Rebuild rubocop TODOs after auto-correcting

.rubocop_todo.yml

@@ -1,257 +1,31 @@
 # This configuration was generated by
 # `rubocop --auto-gen-config`
-# on 2017-11-27 22:40:12 +0530 using RuboCop version 0.51.0.
+# on 2018-04-04 10:16:39 -0700 using RuboCop version 0.54.0.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
-# Offense count: 1
+# Offense count: 8
 # Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
+# Configuration parameters: EnforcedHashRocketStyle, EnforcedColonStyle, EnforcedLastArgumentHashStyle.
-# SupportedStyles: with_first_parameter, with_fixed_indentation
+# SupportedHashRocketStyles: key, separator, table
-Layout/AlignParameters:
+# SupportedColonStyles: key, separator, table
-  Exclude:
+# SupportedLastArgumentHashStyles: always_inspect, always_ignore, ignore_implicit, ignore_explicit
-    - 'Vagrantfile'
+Layout/AlignHash:
-
-# Offense count: 9
-# Cop supports --auto-correct.
-Layout/ClosingParenthesisIndentation:
-  Exclude:
-    - 'app/controllers/conference_registrations_controller.rb'
-    - 'spec/support/omniauth_macros.rb'
-
-# Offense count: 14
-# Cop supports --auto-correct.
-Layout/CommentIndentation:
-  Exclude:
-    - 'app/controllers/admin/comments_controller.rb'
-    - 'app/controllers/admin/difficulty_levels_controller.rb'
-    - 'app/models/conference.rb'
-    - 'app/models/program.rb'
-    - 'app/models/track.rb'
-    - 'spec/features/volunteers_spec.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Layout/EmptyLineAfterMagicComment:
-  Exclude:
-    - 'spec/models/conference_spec.rb'
-
-# Offense count: 109
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: empty_lines, no_empty_lines
-Layout/EmptyLinesAroundBlockBody:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Layout/EmptyLinesAroundExceptionHandlingKeywords:
-  Exclude:
-    - 'app/models/payment.rb'
-
-# Offense count: 9
-# Cop supports --auto-correct.
-# Configuration parameters: AllowForAlignment, ForceEqualSignAlignment.
-Layout/ExtraSpacing:
-  Exclude:
-    - 'Guardfile'
-    - 'app/controllers/application_controller.rb'
-    - 'config.ru'
-    - 'db/migrate/20140623101032_create_ahoy_events.rb'
-    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
-    - 'db/migrate/20140719160903_create_delayed_jobs.rb'
-    - 'spec/models/conference_spec.rb'
-
-# Offense count: 42
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
-# SupportedStyles: consistent, special_for_inner_method_call, special_for_inner_method_call_in_parentheses
-Layout/FirstParameterIndentation:
-  Enabled: false
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
-# SupportedStyles: special_inside_parentheses, consistent, align_brackets
-Layout/IndentArray:
-  Exclude:
-    - 'app/models/conference.rb'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: IndentationWidth.
-Layout/IndentAssignment:
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-    - 'app/models/conference.rb'
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
-# SupportedStyles: special_inside_parentheses, consistent, align_braces
-Layout/IndentHash:
   Exclude:
     - 'app/models/user.rb'
-    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
+    - 'spec/mailers/mailbot_spec.rb'
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: normal, rails
-Layout/IndentationConsistency:
-  Exclude:
-    - 'app/controllers/users_controller.rb'
-    - 'app/models/event.rb'
-    - 'spec/controllers/subscriptions_controller_spec.rb'
-
-# Offense count: 4
-# Cop supports --auto-correct.
-Layout/LeadingCommentSpace:
-  Exclude:
-    - 'Guardfile'
-    - 'app/models/comment.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: symmetrical, new_line, same_line
-Layout/MultilineArrayBraceLayout:
-  Exclude:
-    - 'app/controllers/conference_registrations_controller.rb'
 
 # Offense count: 5
 # Cop supports --auto-correct.
-Layout/MultilineBlockLayout:
+# Configuration parameters: EnforcedStyle, IndentationWidth.
+# SupportedStyles: with_first_parameter, with_fixed_indentation
+Layout/AlignParameters:
   Exclude:
-    - 'app/serializers/conference_serializer.rb'
+    - 'spec/controllers/admin/conferences_controller_spec.rb'
-
+    - 'spec/controllers/admin/registration_periods_controller_spec.rb'
-# Offense count: 6
+    - 'spec/models/email_settings_spec.rb'
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: symmetrical, new_line, same_line
-Layout/MultilineHashBraceLayout:
-  Exclude:
-    - 'app/serializers/conference_serializer.rb'
-    - 'spec/models/event_spec.rb'
-
-# Offense count: 40
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: symmetrical, new_line, same_line
-Layout/MultilineMethodCallBraceLayout:
-  Enabled: false
-
-# Offense count: 53
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
-# SupportedStyles: aligned, indented, indented_relative_to_receiver
-Layout/MultilineMethodCallIndentation:
-  Enabled: false
-
-# Offense count: 23
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, IndentationWidth.
-# SupportedStyles: aligned, indented
-Layout/MultilineOperationIndentation:
-  Exclude:
-    - 'app/controllers/application_controller.rb'
-    - 'app/models/conference.rb'
-    - 'app/models/event.rb'
-    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Layout/SpaceAfterComma:
-  Exclude:
-    - 'lib/tasks/data_demo.rake'
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: space, no_space
-Layout/SpaceAroundEqualsInParameterDefault:
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-    - 'app/models/event.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: AllowForAlignment.
-Layout/SpaceAroundOperators:
-  Exclude:
-    - 'lib/tasks/data.rake'
-
-# Offense count: 463
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, SupportedStylesForEmptyBraces.
-# SupportedStyles: space, no_space
-# SupportedStylesForEmptyBraces: space, no_space
-Layout/SpaceBeforeBlockBraces:
-  Enabled: false
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Layout/SpaceBeforeComma:
-  Exclude:
-    - 'lib/tasks/data_demo.rake'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Layout/SpaceBeforeSemicolon:
-  Exclude:
-    - 'Guardfile'
-
-# Offense count: 54
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, EnforcedStyleForEmptyBraces, SupportedStylesForEmptyBraces, SpaceBeforeBlockParameters.
-# SupportedStyles: space, no_space
-# SupportedStylesForEmptyBraces: space, no_space
-Layout/SpaceInsideBlockBraces:
-  Exclude:
-    - 'app/controllers/admin/comments_controller.rb'
-    - 'app/controllers/admin/questions_controller.rb'
-    - 'app/helpers/application_helper.rb'
-    - 'app/models/program.rb'
-    - 'app/models/ticket.rb'
-    - 'app/models/user.rb'
-    - 'lib/tasks/events_registrations.rake'
-    - 'spec/controllers/admin/event_schedules_controller_spec.rb'
-    - 'spec/controllers/admin/schedules_controller_spec.rb'
-    - 'spec/features/splashpage_spec.rb'
-    - 'spec/models/ability_spec.rb'
-    - 'spec/models/user_spec.rb'
-
-# Offense count: 19
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, EnforcedStyleForEmptyBraces, SupportedStylesForEmptyBraces.
-# SupportedStyles: space, no_space, compact
-# SupportedStylesForEmptyBraces: space, no_space
-Layout/SpaceInsideHashLiteralBraces:
-  Exclude:
-    - 'app/controllers/admin/conferences_controller.rb'
-    - 'app/controllers/api/v1/speakers_controller.rb'
-    - 'app/models/conference.rb'
-    - 'app/models/event_type.rb'
-    - 'app/models/user.rb'
-    - 'spec/models/event_spec.rb'
-    - 'spec/models/payment_spec.rb'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Layout/SpaceInsidePercentLiteralDelimiters:
-  Exclude:
-    - 'Gemfile'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: final_newline, final_blank_line
-Layout/TrailingBlankLines:
-  Exclude:
-    - 'lib/tasks/event_attatchments.rake'
-    - 'lib/tasks/roles.rake'
 
 # Offense count: 13
 Lint/AmbiguousBlockAssociation:
@@ -276,60 +50,34 @@ Lint/IneffectiveAccessModifier:
     - 'app/models/commercial.rb'
     - 'app/models/conference.rb'
 
-# Offense count: 2
+# Offense count: 140
-Lint/RescueWithoutErrorClass:
-  Exclude:
-    - 'app/controllers/users/omniauth_callbacks_controller.rb'
-    - 'lib/tasks/migrate_config.rake'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Lint/ScriptPermission:
-  Exclude:
-    - 'Guardfile'
-    - 'Rakefile'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: IgnoreEmptyBlocks, AllowUnusedKeywordArguments.
-Lint/UnusedBlockArgument:
-  Exclude:
-    - 'lib/tasks/user.rake'
-
-# Offense count: 136
 Metrics/AbcSize:
-  Max: 98
+  Max: 94
 
-# Offense count: 258
+# Offense count: 310
 # Configuration parameters: CountComments, ExcludedMethods.
 Metrics/BlockLength:
-  Max: 471
+  Max: 1420
 
-# Offense count: 28
+# Offense count: 32
 Metrics/CyclomaticComplexity:
   Max: 14
 
-# Offense count: 2774
+# Offense count: 136
-# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-# URISchemes: http, https
-Metrics/LineLength:
-  Max: 619
-
-# Offense count: 133
 # Configuration parameters: CountComments.
 Metrics/MethodLength:
-  Max: 63
+  Max: 60
 
-# Offense count: 4
+# Offense count: 5
 # Configuration parameters: CountComments.
 Metrics/ModuleLength:
-  Max: 200
+  Max: 180
 
-# Offense count: 20
+# Offense count: 22
 Metrics/PerceivedComplexity:
   Max: 16
 
-# Offense count: 20
+# Offense count: 18
 Naming/AccessorMethodName:
   Exclude:
     - 'app/controllers/application_controller.rb'
@@ -367,44 +115,268 @@ Naming/PredicateName:
     - 'app/models/contact.rb'
 
 # Offense count: 2
-# Configuration parameters: EnforcedStyle, SupportedStyles.
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to
+Naming/UncommunicativeMethodParamName:
+  Exclude:
+    - 'app/models/conference.rb'
+
+# Offense count: 2
+# Configuration parameters: EnforcedStyle.
 # SupportedStyles: snake_case, normalcase, non_integer
 Naming/VariableNumber:
   Exclude:
     - 'spec/models/ticket_purchase_spec.rb'
 
-
 # Offense count: 1
 # Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
+# Configuration parameters: EnforcedStyle, Include.
-# SupportedStyles: is_a?, kind_of?
+# SupportedStyles: action, filter
-Style/ClassCheck:
+# Include: app/controllers/**/*.rb
+Rails/ActionFilter:
   Exclude:
+    - 'app/controllers/users/omniauth_callbacks_controller.rb'
+
+# Offense count: 103
+# Cop supports --auto-correct.
+Rails/ActiveRecordAliases:
+  Enabled: false
+
+# Offense count: 124
+# Cop supports --auto-correct.
+Rails/ApplicationRecord:
+  Enabled: false
+
+# Offense count: 11
+# Cop supports --auto-correct.
+# Configuration parameters: NilOrEmpty, NotPresent, UnlessPresent.
+Rails/Blank:
+  Exclude:
+    - 'app/controllers/conferences_controller.rb'
+    - 'app/controllers/users/omniauth_callbacks_controller.rb'
+    - 'app/models/program.rb'
+    - 'app/models/user.rb'
+    - 'db/migrate/20160309182655_remove_dietary_choices_table.rb'
+    - 'spec/factories/event_schedule.rb'
+
+# Offense count: 19
+# Configuration parameters: Include.
+# Include: db/migrate/*.rb
+Rails/CreateTableWithTimestamps:
+  Enabled: false
+
+# Offense count: 126
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: strict, flexible
+Rails/Date:
+  Enabled: false
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforceForPrefixed.
+Rails/Delegate:
+  Exclude:
+    - 'app/models/event.rb'
+    - 'app/models/room.rb'
+    - 'app/models/track.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: Whitelist.
+# Whitelist: find_by_sql
+Rails/DynamicFindBy:
+  Exclude:
+    - 'app/controllers/admin/events_controller.rb'
+    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
+
+# Offense count: 5
+Rails/FilePath:
+  Exclude:
+    - 'app/pdfs/ticket_pdf.rb'
+    - 'spec/features/lodgings_spec.rb'
+    - 'spec/features/sponsor_spec.rb'
+    - 'spec/spec_helper.rb'
+
+# Offense count: 7
+# Cop supports --auto-correct.
+# Configuration parameters: Include.
+# Include: app/models/**/*.rb
+Rails/FindBy:
+  Exclude:
+    - 'app/models/event.rb'
+    - 'app/models/openid.rb'
+    - 'app/models/ticket_purchase.rb'
+    - 'app/models/user.rb'
+
+# Offense count: 6
+# Configuration parameters: Include.
+# Include: app/models/**/*.rb
+Rails/HasAndBelongsToMany:
+  Exclude:
+    - 'app/models/conference.rb'
+    - 'app/models/qanswer.rb'
+    - 'app/models/question.rb'
+    - 'app/models/registration.rb'
+    - 'app/models/vchoice.rb'
+
+# Offense count: 18
+# Configuration parameters: Include.
+# Include: app/models/**/*.rb
+Rails/HasManyOrHasOneDependent:
+  Exclude:
+    - 'app/models/answer.rb'
+    - 'app/models/event.rb'
+    - 'app/models/payment.rb'
+    - 'app/models/physical_ticket.rb'
+    - 'app/models/question_type.rb'
+    - 'app/models/registration.rb'
+    - 'app/models/role.rb'
+    - 'app/models/room.rb'
+    - 'app/models/sponsorship_level.rb'
+    - 'app/models/ticket_purchase.rb'
+    - 'app/models/track.rb'
+    - 'app/models/user.rb'
+    - 'app/models/vday.rb'
+    - 'app/models/visit.rb'
+    - 'app/models/vposition.rb'
+
+# Offense count: 254
+# Cop supports --auto-correct.
+# Configuration parameters: Include.
+# Include: spec/**/*, test/**/*
+Rails/HttpPositionalArguments:
+  Enabled: false
+
+# Offense count: 8
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: numeric, symbolic
+Rails/HttpStatus:
+  Exclude:
+    - 'app/controllers/admin/commercials_controller.rb'
+    - 'app/controllers/admin/event_schedules_controller.rb'
+    - 'app/controllers/admin/programs_controller.rb'
+    - 'app/controllers/admin/tracks_controller.rb'
+    - 'app/controllers/admin/venue_commercials_controller.rb'
+    - 'app/controllers/commercials_controller.rb'
+
+# Offense count: 14
+# Configuration parameters: Include.
+# Include: app/models/**/*.rb
+Rails/InverseOf:
+  Exclude:
+    - 'app/models/booth.rb'
+    - 'app/models/conference.rb'
+    - 'app/models/event.rb'
+    - 'app/models/program.rb'
+    - 'app/models/track.rb'
+    - 'app/models/user.rb'
+    - 'app/models/venue.rb'
+    - 'app/models/visit.rb'
+
+# Offense count: 1
+# Configuration parameters: Include.
+# Include: app/controllers/**/*.rb
+Rails/LexicallyScopedActionFilter:
+  Exclude:
+    - 'app/controllers/registrations_controller.rb'
+
+# Offense count: 4
+Rails/OutputSafety:
+  Exclude:
+    - 'app/helpers/events_helper.rb'
+    - 'app/helpers/format_helper.rb'
+    - 'app/models/commercial.rb'
+
+# Offense count: 15
+# Cop supports --auto-correct.
+Rails/PluralizationGrammar:
+  Exclude:
+    - 'spec/models/conference_spec.rb'
+
+# Offense count: 5
+# Cop supports --auto-correct.
+Rails/Presence:
+  Exclude:
+    - 'app/controllers/schedules_controller.rb'
+    - 'app/helpers/application_helper.rb'
+    - 'app/models/user.rb'
+    - 'db/migrate/20140820124117_undo_wrong_migration20140801080705_add_users_to_events.rb'
+
+# Offense count: 23
+# Cop supports --auto-correct.
+# Configuration parameters: NotNilAndNotEmpty, NotBlank, UnlessBlank.
+Rails/Present:
+  Exclude:
+    - 'app/helpers/users_helper.rb'
+    - 'app/models/campaign.rb'
+    - 'app/models/cfp.rb'
     - 'app/models/email_settings.rb'
+    - 'app/models/event.rb'
+    - 'app/models/program.rb'
+    - 'app/models/venue.rb'
+    - 'db/migrate/20141104131625_generate_username.rb'
+
+# Offense count: 52
+# Configuration parameters: Include.
+# Include: db/migrate/*.rb
+Rails/ReversibleMigration:
+  Exclude:
+    - 'db/migrate/20140530082708_remove_color_defaults.rb'
+    - 'db/migrate/20140605125153_update_event_states.rb'
+    - 'db/migrate/20140610173021_change_person_id_to_user_id_in_registrations.rb'
+    - 'db/migrate/20140611123926_change_person_id_to_user_id_in_votes.rb'
+    - 'db/migrate/20140623150541_drop_person_and_event_person_tables.rb'
+    - 'db/migrate/20140731165107_move_conference_contact_details_to_contact.rb'
+    - 'db/migrate/20140801164901_move_conference_media_to_commercial.rb'
+    - 'db/migrate/20140801170430_move_event_media_to_commercial.rb'
+    - 'db/migrate/20140820093735_migrating_supporter_registrations_to_ticket_users.rb'
+    - 'db/migrate/20140821103643_split_ticket_price_in_price_and_currency.rb'
+    - 'db/migrate/20140825093132_move_splashpage_attributes_from_conference_to_splashpage.rb'
+    - 'db/migrate/20140930092923_move_sponsor_email_to_contact.rb'
+    - 'db/migrate/20141117222919_drop_splash_descriptions_and_photo.rb'
+    - 'db/migrate/20141130182139_drop_table_event_attachments.rb'
+
+# Offense count: 8
+# Configuration parameters: Blacklist.
+# Blacklist: decrement!, decrement_counter, increment!, increment_counter, toggle!, touch, update_all, update_attribute, update_column, update_columns, update_counters
+Rails/SkipsModelValidations:
+  Exclude:
+    - 'app/models/concerns/revision_count.rb'
+    - 'db/migrate/20140730104658_migrate_roles_for_cancancan.rb'
+    - 'db/migrate/20161229080315_add_comments_count_to_events.rb'
+    - 'db/migrate/20180226032958_add_created_at_and_updated_at_to_event_types.rb'
+    - 'db/migrate/20180313012253_add_timestamps_to_tickets.rb'
+    - 'lib/tasks/user.rake'
+    - 'spec/controllers/conferences_controller_spec.rb'
+
+# Offense count: 50
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: strict, flexible
+Rails/TimeZone:
+  Exclude:
+    - 'app/models/comment.rb'
+    - 'app/models/conference.rb'
+    - 'db/migrate/20180226032958_add_created_at_and_updated_at_to_event_types.rb'
+    - 'db/migrate/20180313012253_add_timestamps_to_tickets.rb'
+    - 'lib/tasks/dump_db.rake'
+    - 'spec/controllers/admin/comments_controller_spec.rb'
+    - 'spec/controllers/admin/programs_controller_spec.rb'
+    - 'spec/factories/users.rb'
+    - 'spec/models/campaign_spec.rb'
+    - 'spec/models/conference_spec.rb'
+
+# Offense count: 2
+Security/Open:
+  Exclude:
+    - 'app/pdfs/ticket_pdf.rb'
 
 # Offense count: 1
 Style/ClassVars:
   Exclude:
     - 'spec/support/kneet_connections.rb'
 
-# Offense count: 2
+# Offense count: 11
-# Cop supports --auto-correct.
-Style/ColonMethodCall:
-  Exclude:
-    - 'app/models/commercial.rb'
-    - 'app/models/contact.rb'
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, SingleLineConditionsOnly, IncludeTernaryExpressions.
-# SupportedStyles: assign_to_condition, assign_inside_condition
-Style/ConditionalAssignment:
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-    - 'db/migrate/20140610165551_migrate_data_person_to_user.rb'
-    - 'db/migrate/20140820124117_undo_wrong_migration20140801080705_add_users_to_events.rb'
-
-# Offense count: 9
 Style/DateTime:
   Exclude:
     - 'app/models/conference.rb'
@@ -412,301 +384,66 @@ Style/DateTime:
     - 'spec/models/conference_spec.rb'
     - 'spec/models/program_spec.rb'
 
-# Offense count: 488
+# Offense count: 495
 Style/Documentation:
   Enabled: false
 
-# Offense count: 2
+# Offense count: 20
-# Cop supports --auto-correct.
-Style/EmptyCaseCondition:
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-    - 'app/helpers/versions_helper.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/EmptyLiteral:
-  Exclude:
-    - 'spec/models/conference_spec.rb'
-
-# Offense count: 9
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: compact, expanded
-Style/EmptyMethod:
-  Exclude:
-    - 'app/controllers/admin/lodgings_controller.rb'
-    - 'app/controllers/admin/registration_periods_controller.rb'
-    - 'app/controllers/users_controller.rb'
-    - 'db/migrate/20121223115125_create_tracks_table.rb'
-    - 'db/migrate/20121223115135_create_events_table.rb'
-    - 'db/migrate/20130103134212_create_registrations_table.rb'
-    - 'db/migrate/20130206192339_rename_attending_social_events_with_partner.rb'
-    - 'db/migrate/20130216122155_set_registration_defaults_to_false.rb'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-Style/Encoding:
-  Exclude:
-    - 'app/uploaders/picture_uploader.rb'
-    - 'spec/models/conference_spec.rb'
-
-# Offense count: 32
 # Configuration parameters: MinBodyLength.
 Style/GuardClause:
-  Enabled: false
-
-# Offense count: 4
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, UseHashRocketsWithSymbolValues, PreferHashRocketsForNonAlnumEndingSymbols.
-# SupportedStyles: ruby19, hash_rockets, no_mixed_keys, ruby19_no_mixed_keys
-Style/HashSyntax:
   Exclude:
-    - 'Gemfile'
+    - 'app/controllers/admin/organizations_controller.rb'
-    - 'lib/tasks/user.rake'
-
-# Offense count: 22
-# Cop supports --auto-correct.
-# Configuration parameters: MaxLineLength.
-Style/IfUnlessModifier:
-  Exclude:
-    - 'app/controllers/api/v1/events_controller.rb'
     - 'app/controllers/conference_registrations_controller.rb'
-    - 'app/controllers/users/omniauth_callbacks_controller.rb'
-    - 'app/helpers/application_helper.rb'
-    - 'app/models/commercial.rb'
-    - 'app/models/conference.rb'
-    - 'app/models/email_settings.rb'
-    - 'app/models/user.rb'
-    - 'db/migrate/20151031092713_change_conference_id_to_venue_id_in_rooms.rb'
-    - 'lib/tasks/events_registrations.rake'
-    - 'spec/controllers/admin/conferences_controller_spec.rb'
-    - 'spec/support/flash.rb'
-
-# Offense count: 8
-# Cop supports --auto-correct.
-Style/LineEndConcatenation:
-  Exclude:
-    - 'spec/features/cfp_spec.rb'
-    - 'spec/features/conference_spec.rb'
-    - 'spec/features/registration_periods_spec.rb'
-
-# Offense count: 9
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: require_parentheses, require_no_parentheses, require_no_parentheses_except_multiline
-Style/MethodDefParentheses:
-  Exclude:
-    - 'app/models/conference.rb'
-    - 'app/models/user.rb'
-    - 'lib/tasks/demo_data_for_development.rake'
-
-# Offense count: 7
-# Cop supports --auto-correct.
-Style/MultilineIfModifier:
-  Exclude:
     - 'app/controllers/conferences_controller.rb'
+    - 'app/controllers/registrations_controller.rb'
     - 'app/controllers/schedules_controller.rb'
+    - 'app/helpers/events_helper.rb'
+    - 'app/models/ability.rb'
     - 'app/models/cfp.rb'
-    - 'app/models/event.rb'
+    - 'app/models/conference.rb'
+    - 'app/models/registration.rb'
     - 'app/models/registration_period.rb'
+    - 'app/models/user.rb'
+    - 'db/migrate/20140820124117_undo_wrong_migration20140801080705_add_users_to_events.rb'
+    - 'lib/tasks/data.rake'
 
-# Offense count: 2
+# Offense count: 37
 # Cop supports --auto-correct.
-Style/MutableConstant:
+Style/IfUnlessModifier:
-  Exclude:
-    - 'app/models/event_user.rb'
-    - 'lib/tasks/migrate_config.rake'
-
-# Offense count: 4
-# Cop supports --auto-correct.
-# Configuration parameters: Whitelist.
-# Whitelist: be, be_a, be_an, be_between, be_falsey, be_kind_of, be_instance_of, be_truthy, be_within, eq, eql, end_with, include, match, raise_error, respond_to, start_with
-Style/NestedParenthesizedCalls:
-  Exclude:
-    - 'spec/features/conference_spec.rb'
-    - 'spec/models/conference_spec.rb'
-
-# Offense count: 27
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, MinBodyLength, SupportedStyles.
-# SupportedStyles: skip_modifier_ifs, always
-Style/Next:
   Enabled: false
 
-# Offense count: 117
+# Offense count: 1
-# Cop supports --auto-correct.
+Style/MixinUsage:
-# Configuration parameters: EnforcedOctalStyle, SupportedOctalStyles.
-# SupportedOctalStyles: zero_with_o, zero_only
-Style/NumericLiteralPrefix:
   Exclude:
-    - 'spec/controllers/admin/conferences_controller_spec.rb'
+    - 'spec/spec_helper.rb'
-    - 'spec/controllers/conference_registration_controller_spec.rb'
-    - 'spec/helpers/date_time_helper_spec.rb'
-    - 'spec/models/conference_spec.rb'
-    - 'spec/models/email_settings_spec.rb'
-    - 'spec/models/registration_spec.rb'
-    - 'spec/serializers/conference_serializer_spec.rb'
-    - 'spec/serializers/event_serializer_spec.rb'
 
-# Offense count: 7
+# Offense count: 41
 # Cop supports --auto-correct.
-# Configuration parameters: Strict.
+# Configuration parameters: AutoCorrect, EnforcedStyle.
-Style/NumericLiterals:
-  MinDigits: 15
-
-# Offense count: 7
-# Cop supports --auto-correct.
-# Configuration parameters: AutoCorrect, EnforcedStyle, SupportedStyles.
 # SupportedStyles: predicate, comparison
 Style/NumericPredicate:
   Exclude:
     - 'spec/**/*'
     - 'app/controllers/admin/conferences_controller.rb'
+    - 'app/helpers/application_helper.rb'
     - 'app/helpers/date_time_helper.rb'
     - 'app/helpers/format_helper.rb'
+    - 'app/models/cfp.rb'
+    - 'app/models/conference.rb'
+    - 'app/models/event.rb'
+    - 'app/models/program.rb'
+    - 'app/models/registration.rb'
+    - 'app/models/ticket_purchase.rb'
     - 'app/models/user.rb'
+    - 'lib/tasks/events_registrations.rake'
 
 # Offense count: 3
 Style/OptionalArguments:
   Exclude:
     - 'app/models/event.rb'
 
-# Offense count: 1
+# Offense count: 2835
-# Cop supports --auto-correct.
+# Configuration parameters: AllowHeredoc, AllowURI, URISchemes, IgnoreCopDirectives, IgnoredPatterns.
-Style/OrAssignment:
+# URISchemes: http, https
-  Exclude:
+Metrics/LineLength:
-    - 'app/controllers/schedules_controller.rb'
+  Max: 619
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: AllowSafeAssignment.
-Style/ParenthesesAroundCondition:
-  Exclude:
-    - 'app/controllers/admin/base_controller.rb'
-    - 'app/controllers/application_controller.rb'
-    - 'app/helpers/format_helper.rb'
-
-# Offense count: 15
-# Cop supports --auto-correct.
-# Configuration parameters: PreferredDelimiters.
-Style/PercentLiteralDelimiters:
-  Exclude:
-    - 'Gemfile'
-    - 'app/controllers/admin/users_controller.rb'
-    - 'app/models/cfp.rb'
-    - 'app/models/comment.rb'
-    - 'app/models/commercial.rb'
-    - 'app/models/conference.rb'
-    - 'app/models/contact.rb'
-    - 'app/models/registration.rb'
-    - 'app/models/subscription.rb'
-    - 'app/models/track.rb'
-    - 'app/uploaders/picture_uploader.rb'
-    - 'spec/models/program_spec.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: short, verbose
-Style/PreferredHashMethods:
-  Exclude:
-    - 'lib/tasks/migrate_config.rake'
-
-# Offense count: 6
-# Cop supports --auto-correct.
-# Configuration parameters: SupportedStyles.
-# SupportedStyles: compact, exploded
-Style/RaiseArgs:
-  EnforcedStyle: compact
-
-# Offense count: 1
-# Cop supports --auto-correct.
-Style/RedundantParentheses:
-  Exclude:
-    - 'app/controllers/admin/base_controller.rb'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, AllowInnerSlashes.
-# SupportedStyles: slashes, percent_r, mixed
-Style/RegexpLiteral:
-  Exclude:
-    - 'Guardfile'
-
-# Offense count: 3
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: only_raise, only_fail, semantic
-Style/SignalException:
-  Exclude:
-    - 'lib/tasks/user.rake'
-    - 'spec/support/flash.rb'
-
-# Offense count: 1
-# Cop supports --auto-correct.
-# Configuration parameters: AllowIfMethodIsEmpty.
-Style/SingleLineMethods:
-  Exclude:
-    - 'Guardfile'
-
-# Offense count: 16
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, ConsistentQuotesInMultiline.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiterals:
-  Exclude:
-    - 'Gemfile'
-    - 'Vagrantfile'
-    - 'lib/tasks/dump_db.rake'
-    - 'lib/tasks/events_registrations.rake'
-    - 'lib/tasks/factory_girl.rake'
-    - 'lib/tasks/user.rake'
-
-# Offense count: 6
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles.
-# SupportedStyles: single_quotes, double_quotes
-Style/StringLiteralsInInterpolation:
-  Exclude:
-    - 'lib/tasks/dump_db.rake'
-
-# Offense count: 79
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, MinSize, SupportedStyles.
-# SupportedStyles: percent, brackets
-Style/SymbolArray:
-  Enabled: false
-
-# Offense count: 11
-# Cop supports --auto-correct.
-# Configuration parameters: IgnoredMethods.
-# IgnoredMethods: respond_to, define_method
-Style/SymbolProc:
-  Exclude:
-    - 'app/controllers/admin/comments_controller.rb'
-    - 'app/controllers/admin/questions_controller.rb'
-    - 'app/helpers/application_helper.rb'
-    - 'app/models/ability.rb'
-    - 'app/models/admin_ability.rb'
-    - 'db/migrate/20140730104658_migrate_roles_for_cancancan.rb'
-    - 'spec/controllers/admin/conferences_controller_spec.rb'
-    - 'spec/support/flash.rb'
-
-# Offense count: 2
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyle, SupportedStyles, AllowSafeAssignment.
-# SupportedStyles: require_parentheses, require_no_parentheses, require_parentheses_when_complex
-Style/TernaryParentheses:
-  Exclude:
-    - 'app/helpers/format_helper.rb'
-
-# Offense count: 23
-# Cop supports --auto-correct.
-# Configuration parameters: EnforcedStyleForMultiline, SupportedStylesForMultiline.
-# SupportedStylesForMultiline: comma, consistent_comma, no_comma
-Style/TrailingCommaInLiteral:
-  Exclude:
-    - 'Guardfile'
-    - 'db/migrate/20140701123203_add_events_per_week_to_conference.rb'
-    - 'spec/models/conference_spec.rb'

Gemfile

@@ -1,9 +1,9 @@
+# frozen_string_literal: true
+
 source 'https://rubygems.org'
 
 # rails-assets requires >= 1.8.4
-if Gem::Version.new(Bundler::VERSION) < Gem::Version.new('1.8.4')
+abort 'Bundler version >= 1.8.4 is required' if Gem::Version.new(Bundler::VERSION) < Gem::Version.new('1.8.4')
-  abort "Bundler version >= 1.8.4 is required"
-end
 
 # as web framework
 gem 'rails', '~> 5.0.5'
@@ -60,7 +60,7 @@ gem 'rolify'
 gem 'unobtrusive_flash', '>=3'
 
 # as state machine
-gem 'transitions', :require => %w( transitions active_record/transitions )
+gem 'transitions', require: %w[transitions active_record/transitions]
 
 # for comments
 gem 'acts_as_commentable_with_threading'
@@ -164,7 +164,7 @@ gem 'piwik_analytics', '~> 1.0.1'
 
 # for recurring jobs
 gem 'delayed_job_active_record'
-gem 'whenever', :require => false
+gem 'whenever', require: false
 
 # to run scripts
 gem 'daemons'
@@ -192,7 +192,7 @@ gem 'dotenv-rails'
 gem 'feature'
 
 # For countable.js
-gem "countable-rails", "~> 0.0.1"
+gem 'countable-rails', '~> 0.0.1'
 
 # Both are not in a group as we use it also for rake data:demo
 # for fake data
@@ -244,7 +244,7 @@ group :test do
   # as test framework
   gem 'capybara'
   gem 'database_cleaner'
-  gem 'phantomjs', :require => 'phantomjs/poltergeist'
+  gem 'phantomjs', require: 'phantomjs/poltergeist'
   gem 'poltergeist'
   gem 'rspec-rails', '~> 3.5', '>= 3.5.2'
   # for measuring test coverage

Guardfile

@@ -1,4 +1,6 @@
 #!/usr/bin/ruby
+# frozen_string_literal: true
+
 #
 # More info at https://github.com/guard/guard#readme
 
@@ -8,7 +10,9 @@ guard_opts = {
   cmd: 'spring rspec'
 }
 
-def model_specs       ; 'spec/models'       end
+def model_specs
+  'spec/models'
+end
 
 def model_spec(model)
   "spec/models/#{model}_spec.rb"
@@ -19,19 +23,19 @@ def all_testunit_tests
     model_tests,
     controller_tests,
     helper_tests,
-    integration_tests,
+    integration_tests
   ]
 end
 
 def all_specs
   [
-    model_specs,
+    model_specs
   ]
 end
 
 def startup_guards
-  watch(%r{^Gemfile$})                      { yield }
+  watch(/^Gemfile$/)                      { yield }
-  watch(%r{^Gemfile.lock$})                 { yield }
+  watch(/^Gemfile.lock$/)                 { yield }
   watch(%r{^config/routes.rb$})             { yield }
   watch(%r{^config/application\.rb$})       { yield }
   watch(%r{^config/environment\.rb$})       { yield }
@@ -49,9 +53,9 @@ end
 
 group :rspec do
   guard 'rspec', guard_opts do
-    #startup_guards { all_specs }
+    # startup_guards { all_specs }
     rspec_guards
-    #all_specs
+    # all_specs
   end
 end
 

Rakefile

@@ -1,7 +1,9 @@
 #!/usr/bin/env rake
+# frozen_string_literal: true
+
 # Add your own tasks in files placed in lib/tasks ending in .rake,
 # for example lib/tasks/capistrano.rake, and they will automatically be available to Rake.
 
-require File.expand_path('../config/application', __FILE__)
+require File.expand_path('config/application', __dir__)
 
 Osem::Application.load_tasks

Vagrantfile

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # -*- mode: ruby -*-
 # vi: set ft=ruby :
 
@@ -12,7 +14,7 @@ Vagrant.configure(2) do |config|
 
   # Every Vagrant development environment requires a box. You can search for
   # boxes at https://atlas.hashicorp.com/search.
-  config.vm.box = "opensuse/openSUSE-42.2-x86_64"
+  config.vm.box = 'opensuse/openSUSE-42.2-x86_64'
 
   # Disable automatic box update checking. If you disable this, then
   # boxes will only be checked for updates when the user runs
@@ -22,7 +24,7 @@ Vagrant.configure(2) do |config|
   # Create a forwarded port mapping which allows access to a specific port
   # within the machine from a port on the host machine. In the example below,
   # accessing "localhost:8080" will access port 80 on the guest machine.
-  config.vm.network "forwarded_port", guest: 3000, host: 3000
+  config.vm.network 'forwarded_port', guest: 3000, host: 3000
 
   # Create a private network, which allows host-only access to the machine
   # using a specific IP.
@@ -47,7 +49,7 @@ Vagrant.configure(2) do |config|
   # mount without working about the group mismatch
   VAGRANT_UID = 1000 # User vagrant
   VAGRANT_GID = 100  # Group users
-  config.vm.synced_folder ".", "/vagrant",
+  config.vm.synced_folder '.', '/vagrant',
                           owner: VAGRANT_UID, group: VAGRANT_GID
 
   # Provider-specific configuration so you can fine-tune various
@@ -75,7 +77,7 @@ Vagrant.configure(2) do |config|
   # Enable provisioning with a shell script. Additional provisioners such as
   # Puppet, Chef, Ansible, Salt, and Docker are also available. Please see the
   # documentation for more information about their specific syntax and use.
-  config.vm.provision :shell, path: "bootstrap.sh"
+  config.vm.provision :shell, path: 'bootstrap.sh'
   # config.vm.provision "shell", inline: <<-SHELL
   #   sudo apt-get update
   #   sudo apt-get install -y apache2

app/controllers/admin/base_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class BaseController < ApplicationController
     before_action :verify_user_admin
@@ -9,7 +11,7 @@ module Admin
     end
 
     def verify_user_admin
-      if (current_user.nil?)
+      if current_user.nil?
         redirect_to sign_in_path
         return false
       end
@@ -17,7 +19,7 @@ module Admin
              (current_user.has_cached_role? :info_desk, :any) || (current_user.has_cached_role? :organization_admin, :any) ||
              (current_user.has_cached_role? :volunteers_coordinator, :any) ||
              (current_user.has_cached_role? :track_organizer, :any) || current_user.is_admin
-        raise CanCan::AccessDenied.new('You are not authorized to access this page.')
+        raise CanCan::AccessDenied, 'You are not authorized to access this page.'
       end
     end
   end

app/controllers/admin/booths_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class BoothsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -51,7 +53,7 @@ module Admin
     def update
       @url = admin_conference_booth_path(@conference.short_title, @booth.id)
 
-      @booth.update_attributes(booth_params)
+      @booth.update(booth_params)
 
       if @booth.save
         redirect_to admin_conference_booths_path,
@@ -67,9 +69,7 @@ module Admin
       @booth.accept!
 
       if @booth.save
-        if @conference.email_settings.send_on_booths_acceptance
+        Mailbot.conference_booths_acceptance_mail(@booth).deliver if @conference.email_settings.send_on_booths_acceptance
-          Mailbot.conference_booths_acceptance_mail(@booth).deliver
-        end
         redirect_to admin_conference_booths_path(conference_id: @conference.short_title),
                     notice: 'Booth successfully accepted!'
       else

app/controllers/admin/campaigns_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class CampaignsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -25,7 +27,7 @@ module Admin
     def edit; end
 
     def update
-      if @campaign.update_attributes(campaign_params)
+      if @campaign.update(campaign_params)
         redirect_to admin_conference_campaigns_path(conference_id: @conference.short_title),
                     notice: "Campaign '#{@campaign.name}' successfully updated."
       else

app/controllers/admin/cfps_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class CfpsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -33,7 +35,7 @@ module Admin
 
       send_mail_on_cfp_dates_updates = @cfp.notify_on_cfp_date_update?
 
-      if @cfp.update_attributes(cfp_params)
+      if @cfp.update(cfp_params)
         ConferenceCfpUpdateMailJob.perform_later(@conference) if send_mail_on_cfp_dates_updates
         redirect_to admin_conference_program_cfps_path(@conference.short_title),
                     notice: 'Call for papers successfully updated.'

app/controllers/admin/comments_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class CommentsController < Admin::BaseController
     load_and_authorize_resource
@@ -20,9 +22,9 @@ module Admin
       Comment.accessible_by(current_ability).joins('INNER JOIN events ON commentable_id = events.id').order('events.title', 'comments.created_at DESC')
     end
 
-# Grouping all comments by conference, and by event. It returns {:conference => {:event => [{comment_2}, {comment_1 }]}}
+    # Grouping all comments by conference, and by event. It returns {:conference => {:event => [{comment_2}, {comment_1 }]}}
     def grouped_comments(remarks)
-      remarks.group_by{ |comment| comment.commentable.program.conference }.map {|conference, comments| [conference, comments.group_by{|comment| comment.commentable}]}.to_h
+      remarks.group_by { |comment| comment.commentable.program.conference }.map { |conference, comments| [conference, comments.group_by(&:commentable)] }.to_h
     end
   end
 end

app/controllers/admin/commercials_controller.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Admin
   class CommercialsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
-    load_and_authorize_resource through: :conference, except: [:new, :create]
+    load_and_authorize_resource through: :conference, except: %i[new create]
 
     def index
       @commercials = @conference.commercials
@@ -43,7 +45,7 @@ module Admin
     def render_commercial
       result = Commercial.render_from_url(params[:url])
       if result[:error]
-        render text: result[:error], status: 400
+        render text: result[:error], status: :bad_request
       else
         render text: result[:html]
       end

app/controllers/admin/conferences_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class ConferencesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -99,7 +101,7 @@ module Admin
       @conference.assign_attributes(conference_params)
       send_mail_on_conf_update = @conference.notify_on_dates_changed?
 
-      if @conference.update_attributes(conference_params)
+      if @conference.update(conference_params)
         ConferenceDateUpdateMailJob.perform_later(@conference) if send_mail_on_conf_update
         redirect_to edit_admin_conference_path(id: @conference.short_title),
                     notice: 'Conference was successfully updated.'
@@ -136,7 +138,7 @@ module Admin
       @conference_progress = @conference.get_status
 
       # Line charts
-      @registrations = {@conference.short_title => @conference.get_registrations_per_week}
+      @registrations = { @conference.short_title => @conference.get_registrations_per_week }
       @registration_weeks = [0]
       @registration_weeks.push(@registrations[@conference.short_title].length)
 

app/controllers/admin/contacts_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class ContactsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title

app/controllers/admin/difficulty_levels_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class DifficultyLevelsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -5,7 +7,7 @@ module Admin
     load_and_authorize_resource through: :program
 
     def index
-#       authorize! :index, DifficultyLevel.new(program_id: @program.id)
+      #       authorize! :index, DifficultyLevel.new(program_id: @program.id)
     end
 
     def edit; end
@@ -26,7 +28,7 @@ module Admin
     end
 
     def update
-      if @difficulty_level.update_attributes(difficulty_level_params)
+      if @difficulty_level.update(difficulty_level_params)
         redirect_to admin_conference_program_difficulty_levels_path(conference_id: @conference.short_title),
                     notice: 'Difficulty level successfully updated.'
       else

app/controllers/admin/emails_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class EmailsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -6,11 +8,13 @@ module Admin
     def update
       if @conference.email_settings.update(email_params)
         redirect_to admin_conference_emails_path(
-                    @conference.short_title),
+          @conference.short_title
+        ),
                     notice: 'Email settings have been successfully updated.'
       else
         redirect_to admin_conference_emails_path(
-                    @conference.short_title),
+          @conference.short_title
+        ),
                     error: "Updating email settings failed. #{@conference.email_settings.errors.to_a.join('. ')}."
       end
     end

app/controllers/admin/event_schedules_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class EventSchedulesController < Admin::BaseController
     load_and_authorize_resource :event_schedule
@@ -6,7 +8,7 @@ module Admin
       if @event_schedule.save
         render json: { event_schedule_id: @event_schedule.id }
       else
-        render json: { errors: "The event couldn't be scheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: 422
+        render json: { errors: "The event couldn't be scheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: :unprocessable_entity
       end
     end
 
@@ -14,7 +16,7 @@ module Admin
       if @event_schedule.update(event_schedule_params)
         render json: { event_schedule_id: @event_schedule.id }
       else
-        render json: { errors: "The event couldn't be scheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: 422
+        render json: { errors: "The event couldn't be scheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: :unprocessable_entity
       end
     end
 
@@ -22,7 +24,7 @@ module Admin
       if @event_schedule.destroy
         render json: {}
       else
-        render json: { errors: "The event couldn't be unscheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: 422
+        render json: { errors: "The event couldn't be unscheduled. #{@event_schedule.errors.full_messages.join('. ')}" }, status: :unprocessable_entity
       end
     end
 

app/controllers/admin/event_types_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class EventTypesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -24,7 +26,7 @@ module Admin
     end
 
     def update
-      if @event_type.update_attributes(event_type_params)
+      if @event_type.update(event_type_params)
         redirect_to admin_conference_program_event_types_path(conference_id: @conference.short_title),
                     notice: 'Event type successfully updated.'
       else

app/controllers/admin/events_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class EventsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -7,7 +9,7 @@ module Admin
     # For some reason this doesn't work, so a workaround is used
     # load_and_authorize_resource :track, through: :program, only: [:index, :show, :edit]
 
-    before_action :assign_tracks, only: [:index, :show, :edit]
+    before_action :assign_tracks, only: %i[index show edit]
 
     def index
       @difficulty_levels = @program.difficulty_levels
@@ -17,7 +19,7 @@ module Admin
       @scheduled_event_distribution = @conference.scheduled_event_distribution
       @file_name = "events_for_#{@conference.short_title}"
       @event_export_option = params[:event_export_option]
-      @export_formats = [:pdf, :csv, :xlsx]
+      @export_formats = %i[pdf csv xlsx]
 
       respond_to do |format|
         format.html
@@ -69,7 +71,7 @@ module Admin
 
     def update
       @languages = @program.languages_list
-      if @event.update_attributes(event_params)
+      if @event.update(event_params)
 
         if request.xhr?
           render js: 'index'
@@ -139,8 +141,8 @@ module Admin
     def vote
       @votes = @event.votes.includes(:user)
 
-      if (votes = current_user.votes.find_by_event_id(params[:id]))
+      if (votes = current_user.votes.find_by(event_id: params[:id]))
-        votes.update_attributes(rating: params[:rating])
+        votes.update(rating: params[:rating])
       else
         @myvote = @event.votes.build
         @myvote.user = current_user
@@ -178,7 +180,8 @@ module Admin
         :track_id, :state, :language, :is_highlight, :max_attendees,
         # Not used anymore?
         :proposal_additional_speakers, :user, :users_attributes,
-                                    speaker_ids: [])
+        speaker_ids: []
+      )
     end
 
     def comment_params

app/controllers/admin/lodgings_controller.rb

@@ -1,10 +1,11 @@
+# frozen_string_literal: true
+
 module Admin
   class LodgingsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
     load_and_authorize_resource :lodging, through: :conference
 
-    def index
+    def index; end
-    end
 
     def new
       @lodging = @conference.lodgings.new
@@ -24,7 +25,7 @@ module Admin
     def edit; end
 
     def update
-      if @lodging.update_attributes(lodging_params)
+      if @lodging.update(lodging_params)
         redirect_to admin_conference_lodgings_path(conference_id: @conference.short_title),
                     notice: 'Lodging successfully updated.'
       else

app/controllers/admin/organizations_controller.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Admin
   class OrganizationsController < Admin::BaseController
     load_and_authorize_resource :organization
-    before_action :verify_user, only: [:assign_org_admins, :unassign_org_admins]
+    before_action :verify_user, only: %i[assign_org_admins unassign_org_admins]
 
     def index
       @organizations = Organization.all
@@ -25,7 +27,7 @@ module Admin
     def edit; end
 
     def update
-      if @organization.update_attributes(organization_params)
+      if @organization.update(organization_params)
         redirect_to admin_organizations_path,
                     notice: 'Organization successfully updated'
       else

app/controllers/admin/physical_tickets_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class PhysicalTicketsController < Admin::BaseController
     before_action :authenticate_user!

app/controllers/admin/programs_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class ProgramsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -14,7 +16,7 @@ module Admin
       send_mail_on_schedule_public = @program.notify_on_schedule_public?
       event_schedules_count_was = @program.event_schedules.count
 
-      if @program.update_attributes(program_params)
+      if @program.update(program_params)
         ConferenceScheduleUpdateMailJob.perform_later(@conference) if send_mail_on_schedule_public
         respond_to do |format|
           format.html do
@@ -30,7 +32,7 @@ module Admin
             flash.now[:error] = "Updating program failed. #{@program.errors.to_a.join('. ')}."
             render :new
           end
-          format.js { render json: { errors: "The selected schedule couldn't be updated #{@program.errors.to_a.join('. ')}" }, status: 422 }
+          format.js { render json: { errors: "The selected schedule couldn't be updated #{@program.errors.to_a.join('. ')}" }, status: :unprocessable_entity }
         end
       end
     end

app/controllers/admin/questions_controller.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Admin
   class QuestionsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
-    load_and_authorize_resource through: :conference, except: [:new, :create]
+    load_and_authorize_resource through: :conference, except: %i[new create]
 
     def index
       authorize! :index, Question.new(conference_id: @conference.id)
@@ -24,9 +26,7 @@ module Admin
       @question.conference_id = @conference.id
       authorize! :create, @question
 
-      if @question.question_type_id == QuestionType.find_by(title: 'Yes/No').id
+      @question.answers = [Answer.find_by(title: 'Yes'), Answer.find_by(title: 'No')] if @question.question_type_id == QuestionType.find_by(title: 'Yes/No').id
-        @question.answers = [Answer.find_by(title: 'Yes'), Answer.find_by(title: 'No')]
-      end
 
       respond_to do |format|
         if @conference.save
@@ -39,14 +39,12 @@ module Admin
 
     # GET questions/1/edit
     def edit
-      if @question.global
+      redirect_to admin_conference_questions_path(conference_id: @conference.short_title), error: 'Sorry, you cannot edit global questions. Create a new one.' if @question.global
-        redirect_to admin_conference_questions_path(conference_id: @conference.short_title), error: 'Sorry, you cannot edit global questions. Create a new one.'
-      end
     end
 
     # PUT questions/1
     def update
-      if @question.update_attributes(question_params)
+      if @question.update(question_params)
         redirect_to admin_conference_questions_path(conference_id: @conference.short_title), notice: "Question '#{@question.title}' for #{@conference.short_title} successfully updated."
       else
         redirect_to admin_conference_questions_path(conference_id: @conference.short_title), notice: "Update of questions for #{@conference.short_title} failed. #{@question.errors.full_messages.join('. ')}"
@@ -56,7 +54,7 @@ module Admin
     # Update questions used for the conference
     def update_conference
       authorize! :update, Question.new(conference_id: @conference.id)
-      if @conference.update_attributes(conference_params)
+      if @conference.update(conference_params)
         redirect_to admin_conference_questions_path(conference_id: @conference.short_title), notice: "Questions for #{@conference.short_title} successfully updated."
       else
         redirect_to admin_conference_questions_path(conference_id: @conference.short_title), notice: "Update of questions for #{@conference.short_title} failed."
@@ -73,12 +71,9 @@ module Admin
           # Delete question and its answers
           begin
             Question.transaction do
-
               @question.destroy
-              @question.answers.each do |a|
+              @question.answers.each(&:destroy)
-                a.destroy
+              flash[:notice] = "Deleted question: #{@question.title} and its answers: #{@question.answers.map(&:title).join ','}"
-              end
-              flash[:notice] = "Deleted question: #{@question.title} and its answers: #{@question.answers.map {|a| a.title}.join ','}"
             end
           rescue ActiveRecord::RecordInvalid
             flash[:error] = 'Could not delete question.'
@@ -95,7 +90,7 @@ module Admin
     private
 
     def question_params
-      params.require(:question).permit(:title, :global, :answer_ids, :question_type_id, :conference_id, answers_attributes: [:id, :title])
+      params.require(:question).permit(:title, :global, :answer_ids, :question_type_id, :conference_id, answers_attributes: %i[id title])
     end
 
     def conference_params

app/controllers/admin/registration_periods_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class RegistrationPeriodsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -21,11 +23,9 @@ module Admin
       end
     end
 
-    def edit
+    def edit; end
-    end
 
-    def show
+    def show; end
-    end
 
     def update
       @registration_period.assign_attributes(registration_period_params)

app/controllers/admin/registrations_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class RegistrationsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -17,9 +19,9 @@ module Admin
     def edit; end
 
     def update
-      @user.update_attributes(user_params)
+      @user.update(user_params)
 
-      @registration.update_attributes(registration_params)
+      @registration.update(registration_params)
       if @registration.save
         redirect_to admin_conference_registrations_path(@conference.short_title),
                     notice: "Successfully updated registration for #{@registration.user.email}!"

app/controllers/admin/reports_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class ReportsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title

app/controllers/admin/resources_controller.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 module Admin
   class ResourcesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
-    load_and_authorize_resource :resource, only: [:show, :edit, :update, :destroy]
+    load_and_authorize_resource :resource, only: %i[show edit update destroy]
 
     def index; end
 
@@ -23,7 +25,7 @@ module Admin
     end
 
     def update
-      if @resource.update_attributes(resource_params)
+      if @resource.update(resource_params)
         redirect_to admin_conference_resources_path(conference_id: @conference.short_title),
                     notice: 'Resource successfully updated.'
       else

app/controllers/admin/roles_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class RolesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -34,7 +36,7 @@ module Admin
     def update
       role_name = @role.name
 
-      if @role.update_attributes(role_params)
+      if @role.update(role_params)
         url = if @track
                 admin_conference_program_track_role_path(@conference.short_title, @track, @role.name)
               else

app/controllers/admin/rooms_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class RoomsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -24,7 +26,7 @@ module Admin
     end
 
     def update
-      if @room.update_attributes(room_params)
+      if @room.update(room_params)
         redirect_to admin_conference_venue_rooms_path(conference_id: @conference.short_title),
                     notice: 'Room successfully updated.'
       else

app/controllers/admin/schedules_controller.rb

@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 module Admin
   class SchedulesController < Admin::BaseController
     # By authorizing 'conference' resource, we can ensure there will be no unauthorized access to
     # the schedule of a conference, which should not be accessed in the first place
     load_and_authorize_resource :conference, find_by: :short_title
     load_and_authorize_resource :program, through: :conference, singleton: true
-    load_and_authorize_resource :schedule, through: :program, except: [:new, :create]
+    load_and_authorize_resource :schedule, through: :program, except: %i[new create]
     load_resource :event_schedules, through: :schedule
     load_resource :selected_schedule, through: :program, singleton: true
     load_resource :venue, through: :conference, singleton: true

app/controllers/admin/splashpages_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class SplashpagesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -23,7 +25,7 @@ module Admin
     end
 
     def update
-      if @splashpage.update_attributes(splashpage_params)
+      if @splashpage.update(splashpage_params)
         redirect_to admin_conference_splashpage_path,
                     notice: 'Splashpage successfully updated.'
       else

app/controllers/admin/sponsors_controller.rb

@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 module Admin
   class SponsorsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
     load_and_authorize_resource :sponsor, through: :conference
-    before_action :sponsorship_level_required, only: [:index, :new]
+    before_action :sponsorship_level_required, only: %i[index new]
 
     def index
       authorize! :index, Sponsor.new(conference_id: @conference.id)
@@ -26,9 +28,10 @@ module Admin
     end
 
     def update
-      if @sponsor.update_attributes(sponsor_params)
+      if @sponsor.update(sponsor_params)
         redirect_to admin_conference_sponsors_path(
-                    conference_id: @conference.short_title),
+          conference_id: @conference.short_title
+        ),
                     notice: 'Sponsor successfully updated.'
       else
         flash.now[:error] = "Update sponsor failed: #{@sponsor.errors.full_messages.join('. ')}."

app/controllers/admin/sponsorship_levels_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class SponsorshipLevelsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -25,9 +27,10 @@ module Admin
     end
 
     def update
-      if @sponsorship_level.update_attributes(sponsorship_level_params)
+      if @sponsorship_level.update(sponsorship_level_params)
         redirect_to admin_conference_sponsorship_levels_path(
-                    conference_id: @conference.short_title),
+          conference_id: @conference.short_title
+        ),
                     notice: 'Sponsorship level successfully updated.'
       else
         flash.now[:error] = "Update Sponsorship level failed: #{@sponsorship_level.errors.full_messages.join('. ')}."

app/controllers/admin/targets_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class TargetsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -23,7 +25,7 @@ module Admin
     def edit; end
 
     def update
-      if @target.update_attributes(target_params)
+      if @target.update(target_params)
         redirect_to admin_conference_targets_path(conference_id: @conference.short_title),
                     notice: 'Target successfully updated.'
       else

app/controllers/admin/ticket_scannings_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class TicketScanningsController < Admin::BaseController
     before_action :authenticate_user!

app/controllers/admin/tickets_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class TicketsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -27,7 +29,7 @@ module Admin
     def edit; end
 
     def update
-      if @ticket.update_attributes(ticket_params)
+      if @ticket.update(ticket_params)
         redirect_to admin_conference_tickets_path(conference_id: @conference.short_title),
                     notice: 'Ticket successfully updated.'
       else

app/controllers/admin/tracks_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class TracksController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -54,7 +56,7 @@ module Admin
     def edit; end
 
     def update
-      if @track.update_attributes(track_params)
+      if @track.update(track_params)
         redirect_to admin_conference_program_tracks_path(conference_id: @conference.short_title),
                     notice: 'Track successfully updated.'
       else
@@ -120,13 +122,13 @@ module Admin
     end
 
     def update_selected_schedule
-      if @track.update_attributes(params.require(:track).permit(:selected_schedule_id))
+      if @track.update(params.require(:track).permit(:selected_schedule_id))
         respond_to do |format|
           format.js { render json: {} }
         end
       else
         respond_to do |format|
-          format.js { render json: { errors: "The selected schedule couldn't be updated #{@track.errors.to_a.join('. ')}" }, status: 422 }
+          format.js { render json: { errors: "The selected schedule couldn't be updated #{@track.errors.to_a.join('. ')}" }, status: :unprocessable_entity }
         end
       end
     end

app/controllers/admin/users_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class UsersController < Admin::BaseController
     load_and_authorize_resource
@@ -36,9 +38,9 @@ module Admin
       # Variable @show_attributes holds the attributes that are visible for the 'show' action
       # If you want to change the attributes that are shown in the 'show' action of users
       # add/remove the attributes in the following string array
-      @show_attributes = %w(name email username nickname affiliation biography registered attended roles created_at
+      @show_attributes = %w[name email username nickname affiliation biography registered attended roles created_at
                             updated_at sign_in_count current_sign_in_at last_sign_in_at
-                            current_sign_in_ip last_sign_in_ip)
+                            current_sign_in_ip last_sign_in_ip]
     end
 
     def update
@@ -49,7 +51,7 @@ module Admin
         end
       end
 
-      if @user.update_attributes(user_params)
+      if @user.update(user_params)
         redirect_to admin_users_path, notice: "Updated #{@user.name} (#{@user.email})!" + message
       else
         redirect_to admin_users_path, error: "Could not update #{@user.name} (#{@user.email}). #{@user.errors.full_messages.join('. ')}."

app/controllers/admin/venue_commercials_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class VenueCommercialsController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -38,7 +40,7 @@ module Admin
     def render_commercial
       result = Commercial.render_from_url(params[:url])
       if result[:error]
-        render text: result[:error], status: 400
+        render text: result[:error], status: :bad_request
       else
         render text: result[:html]
       end

app/controllers/admin/venues_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class VenuesController < Admin::BaseController
     load_and_authorize_resource :conference, find_by: :short_title
@@ -23,7 +25,7 @@ module Admin
     end
 
     def update
-      if @venue.update_attributes(venue_params)
+      if @venue.update(venue_params)
         redirect_to admin_conference_venue_path(conference_id: @conference.short_title),
                     notice: 'Venue was successfully updated.'
       else

app/controllers/admin/versions_controller.rb

@@ -1,14 +1,14 @@
+# frozen_string_literal: true
+
 module Admin
   class VersionsController < Admin::BaseController
     load_resource :conference, find_by: :short_title, only: :index
     load_and_authorize_resource class: PaperTrail::Version
 
     def index
-      @conferences_with_role = current_user.is_admin? ? Conference.pluck(:short_title) : Conference.with_role([:organizer, :cfp, :info_desk], current_user).pluck(:short_title)
+      @conferences_with_role = current_user.is_admin? ? Conference.pluck(:short_title) : Conference.with_role(%i[organizer cfp info_desk], current_user).pluck(:short_title)
 
-      if current_user.has_cached_role? :organization_admin, :any
+      @conferences_with_role = Organization.with_role('organization_admin', current_user).map { |org| org.conferences.pluck :short_title }.flatten if current_user.has_cached_role? :organization_admin, :any
-        @conferences_with_role = Organization.with_role('organization_admin', current_user).map { |org| org.conferences.pluck :short_title }.flatten
-      end
       @conferences_with_role.uniq!
 
       return if @conference.blank?
@@ -16,7 +16,7 @@ module Admin
     end
 
     def revert_attribute
-      if params[:attribute] && @version.changeset.reject{ |_, values| values[0].blank? && values[1].blank? }.keys.include?(params[:attribute])
+      if params[:attribute] && @version.changeset.reject { |_, values| values[0].blank? && values[1].blank? }.keys.include?(params[:attribute])
         if @version.item[params[:attribute]] == @version.changeset[params[:attribute]][0]
           flash[:error] = 'The item is already in the state that you are trying to revert it back to'
 

app/controllers/admin/volunteers_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   class VolunteersController < Admin::BaseController
     include VolunteersHelper
@@ -24,7 +26,7 @@ module Admin
     end
 
     def update
-      if @conference.update_attributes(conference_params)
+      if @conference.update(conference_params)
         redirect_to admin_conference_volunteers_info_path(conference_id: params[:conference_id]), notice: 'Volunteering options were successfully updated.'
       else
         redirect_to admin_conference_volunteers_info_path(conference_id: params[:conference_id]), error: "Volunteering options update failed: #{@conference.errors.full_messages.join '. '}"

app/controllers/api/base_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   class BaseController < ActionController::Base
     protect_from_forgery with: :exception

app/controllers/api/v1/conferences_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   module V1
     class ConferencesController < Api::BaseController

app/controllers/api/v1/events_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   module V1
     class EventsController < Api::BaseController
@@ -10,9 +12,7 @@ module Api
       def index
         events = Event.includes(:track, :event_type, event_users: :user)
 
-        if @conference
+        events = events.where(program: @conference.program) if @conference
-          events = events.where(program: @conference.program)
-        end
 
         respond_with events.confirmed, callback: params[:callback]
       end

app/controllers/api/v1/rooms_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   module V1
     class RoomsController < Api::BaseController

app/controllers/api/v1/speakers_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   module V1
     class SpeakersController < Api::BaseController
@@ -9,13 +11,13 @@ module Api
 
       def index
         if @conference
-          users = User.joins(event_users: { event: { program: :conference} })
+          users = User.joins(event_users: { event: { program: :conference } })
           users = users.where(conferences: { short_title: @conference.short_title })
         else
           users = User.joins(:event_users)
         end
 
-        users = users.where(event_users: {event_role: :speaker}).uniq
+        users = users.where(event_users: { event_role: :speaker }).uniq
         render json: users, each_serializer: SpeakerSerializer, callback: params['callback']
       end
     end

app/controllers/api/v1/tracks_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Api
   module V1
     class TracksController < Api::BaseController

app/controllers/application_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationController < ActionController::Base
   before_action :set_paper_trail_whodunnit
   include ApplicationHelper
@@ -11,7 +13,7 @@ class ApplicationController < ActionController::Base
   def store_location
     # store last url - this is needed for post-login redirect to whatever the user last visited.
     return unless request.get?
-    if (request.path != '/accounts/sign_in' &&
+    if request.path != '/accounts/sign_in' &&
        request.path != '/accounts/sign_up' &&
        request.path != '/accounts/password/new' &&
        request.path != '/accounts/password/edit' &&
@@ -19,7 +21,7 @@ class ApplicationController < ActionController::Base
        request.path != '/accounts/sign_out' &&
        request.path != '/users/ichain_registration/ichain_sign_up' &&
        !request.path.starts_with?(Devise.ichain_base_url) &&
-        !request.xhr?) # don't store ajax calls
+       !request.xhr? # don't store ajax calls
       session[:return_to] = request.fullpath
     end
   end
@@ -65,6 +67,6 @@ class ApplicationController < ActionController::Base
   end
 
   def not_found
-    raise ActionController::RoutingError.new('Not Found')
+    raise ActionController::RoutingError, 'Not Found'
   end
 end

app/controllers/booths_controller.rb

@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 class BoothsController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title
   load_and_authorize_resource through: :conference
-  skip_authorize_resource only: [:withdraw, :confirm, :restart]
+  skip_authorize_resource only: %i[withdraw confirm restart]
 
   def index
     @booths = current_user.booths.where(conference_id: @conference.id).uniq
@@ -34,7 +36,7 @@ class BoothsController < ApplicationController
 
   def update
     @url = conference_booth_path(@conference.short_title, @booth.id)
-    @booth.update_attributes(booth_params)
+    @booth.update(booth_params)
 
     if @booth.save
       redirect_to conference_booths_path,

app/controllers/commercials_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class CommercialsController < ApplicationController
   load_resource :conference, find_by: :short_title
   before_action :set_event
@@ -35,7 +37,7 @@ class CommercialsController < ApplicationController
   def render_commercial
     result = Commercial.render_from_url(params[:url])
     if result[:error]
-      render text: result[:error], status: 400
+      render text: result[:error], status: :bad_request
     else
       render text: result[:html]
     end

app/controllers/conference_registrations_controller.rb

@@ -1,8 +1,10 @@
+# frozen_string_literal: true
+
 class ConferenceRegistrationsController < ApplicationController
-  before_action :authenticate_user!, except: [:new, :create]
+  before_action :authenticate_user!, except: %i[new create]
   load_resource :conference, find_by: :short_title
-  authorize_resource :conference_registrations, class: Registration, except: [:new, :create]
+  authorize_resource :conference_registrations, class: Registration, except: %i[new create]
-  before_action :set_registration, only: [:edit, :update, :destroy, :show]
+  before_action :set_registration, only: %i[edit update destroy show]
 
   def new
     @registration = Registration.new(conference_id: @conference.id)
@@ -54,9 +56,7 @@ class ConferenceRegistrationsController < ApplicationController
       ahoy.track 'Registered', title: 'New registration'
 
       # Sign in the new user
-      unless current_user
+      sign_in(@registration.user) unless current_user
-        sign_in(@registration.user)
-      end
 
       if @conference.tickets.any? && !current_user.supports?(@conference)
         redirect_to conference_tickets_path(@conference.short_title),
@@ -73,7 +73,7 @@ class ConferenceRegistrationsController < ApplicationController
   end
 
   def update
-    if @registration.update_attributes(registration_params)
+    if @registration.update(registration_params)
       redirect_to  conference_conference_registration_path(@conference.short_title),
                    notice: 'Registration was successfully updated.'
     else
@@ -116,8 +116,9 @@ class ConferenceRegistrationsController < ApplicationController
             vchoice_ids: [], qanswer_ids: [],
             qanswers_attributes: [],
             event_ids: [],
-          user_attributes: [
+            user_attributes: %i[
-            :username, :email, :name, :password, :password_confirmation]
+              username email name password password_confirmation
+            ]
           )
   end
 end

app/controllers/conferences_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferencesController < ApplicationController
   protect_from_forgery with: :null_session
   before_action :respond_to_options
@@ -21,9 +23,7 @@ class ConferencesController < ApplicationController
 
     splashpage = @conference.splashpage
 
-    unless splashpage.present?
+    redirect_to admin_conference_splashpage_path(@conference.short_title) && return if splashpage.blank?
-      redirect_to admin_conference_splashpage_path(@conference.short_title) && return
-    end
 
     if splashpage.include_cfp
       cfps = @conference.program.cfps
@@ -42,16 +42,10 @@ class ConferencesController < ApplicationController
           :room
         ).order('tracks.name')
       end
-      if splashpage.include_booths
+      @booths = @conference.confirmed_booths.order('title') if splashpage.include_booths
-        @booths = @conference.confirmed_booths.order('title')
-      end
-    end
-    if splashpage.include_registrations || splashpage.include_tickets
-      @tickets = @conference.tickets.order('price_cents')
-    end
-    if splashpage.include_lodgings
-      @lodgings = @conference.lodgings.order('name')
     end
+    @tickets = @conference.tickets.order('price_cents') if splashpage.include_registrations || splashpage.include_tickets
+    @lodgings = @conference.lodgings.order('name') if splashpage.include_lodgings
     if splashpage.include_sponsors
       @sponsorship_levels = @conference.sponsorship_levels.eager_load(
         :sponsors
@@ -71,8 +65,10 @@ class ConferencesController < ApplicationController
   end
 
   def respond_to_options
+    if request.options?
       respond_to do |format|
         format.html { head :ok }
-    end if request.options?
+      end
+    end
   end
 end

app/controllers/confirmations_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConfirmationsController < Devise::ConfirmationsController
   protected
 

app/controllers/openids_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class OpenidsController < ApplicationController
   load_and_authorize_resource :user
   load_and_authorize_resource through: :user

app/controllers/organizations_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class OrganizationsController < ApplicationController
   load_and_authorize_resource :organization
 

app/controllers/payments_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PaymentsController < ApplicationController
   before_action :authenticate_user!
   load_and_authorize_resource
@@ -10,9 +12,7 @@ class PaymentsController < ApplicationController
 
   def new
     @total_amount_to_pay = Ticket.total_price(@conference, current_user, paid: false)
-    if @total_amount_to_pay.zero?
+    raise CanCan::AccessDenied.new('Nothing to pay for!', :new, Payment) if @total_amount_to_pay.zero?
-      raise CanCan::AccessDenied.new('Nothing to pay for!', :new, Payment)
-    end
     @unpaid_ticket_purchases = current_user.ticket_purchases.unpaid.by_conference(@conference)
   end
 

app/controllers/physical_tickets_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class PhysicalTicketsController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title

app/controllers/proposals_controller.rb

@@ -1,10 +1,12 @@
+# frozen_string_literal: true
+
 class ProposalsController < ApplicationController
-  before_action :authenticate_user!, except: [:show, :new, :create]
+  before_action :authenticate_user!, except: %i[show new create]
   load_resource :conference, find_by: :short_title
   load_resource :program, through: :conference, singleton: true
   load_and_authorize_resource :event, parent: false, through: :program
   # We authorize manually in these actions
-  skip_authorize_resource :event, only: [:confirm, :restart, :withdraw]
+  skip_authorize_resource :event, only: %i[confirm restart withdraw]
 
   def index
     @event = @program.events.new
@@ -168,8 +170,7 @@ class ProposalsController < ApplicationController
     params.require(:event).permit(:event_type_id, :track_id, :difficulty_level_id,
                                   :title, :subtitle, :abstract, :description,
                                   :require_registration, :max_attendees, :language,
-                                  speaker_ids: []
+                                  speaker_ids: [])
-                                 )
   end
 
   def user_params

app/controllers/registrations_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class RegistrationsController < Devise::RegistrationsController
   prepend_before_action :check_captcha, only: [:create]
 

app/controllers/schedules_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class SchedulesController < ApplicationController
   load_and_authorize_resource
   protect_from_forgery with: :null_session
@@ -8,11 +10,9 @@ class SchedulesController < ApplicationController
   def show
     @rooms = @conference.venue.rooms if @conference.venue
     schedules = @program.selected_event_schedules
-    unless schedules
+    redirect_to events_conference_schedule_path(@conference.short_title) unless schedules
-      redirect_to events_conference_schedule_path(@conference.short_title)
-    end
 
-    @events_xml = schedules.map(&:event).group_by{ |event| event.time.to_date } if schedules
+    @events_xml = schedules.map(&:event).group_by { |event| event.time.to_date } if schedules
     @dates = @conference.start_date..@conference.end_date
     @step_minutes = @program.schedule_interval.minutes
     @conf_start = @conference.start_hour
@@ -20,7 +20,7 @@ class SchedulesController < ApplicationController
 
     # the schedule takes you to today if it is a date of the schedule
     @current_day = @conference.current_conference_day
-    @day = @current_day.present? ? @current_day : @dates.first
+    @day = @current_day.presence || @dates.first
     unless @current_day
       # the schedule takes you to the current time if it is beetween the start and the end time.
       @hour_column = @conference.hours_from_start_time(@conf_start, @conference.end_hour)
@@ -37,7 +37,7 @@ class SchedulesController < ApplicationController
     @dates = @conference.start_date..@conference.end_date
 
     @events_schedules = @program.selected_event_schedules
-    @events_schedules = [] unless @events_schedules
+    @events_schedules ||= []
 
     @unscheduled_events = @program.events.confirmed - @events_schedules.map(&:event)
 
@@ -48,8 +48,10 @@ class SchedulesController < ApplicationController
   private
 
   def respond_to_options
+    if request.options?
       respond_to do |format|
         format.html { head :ok }
-    end if request.options?
+      end
+    end
   end
 end

app/controllers/subscriptions_controller.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 class SubscriptionsController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title
-  load_and_authorize_resource only: [:create, :destroy], through: :conference
+  load_and_authorize_resource only: %i[create destroy], through: :conference
 
   def create
     @subscription = current_user.subscriptions.build(conference_id: @conference.id)

app/controllers/ticket_purchases_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TicketPurchasesController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title

app/controllers/tickets_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TicketsController < ApplicationController
   before_action :authenticate_user!
   load_resource :conference, find_by: :short_title
@@ -8,8 +10,6 @@ class TicketsController < ApplicationController
   def index; end
 
   def check_load_resource
-    if @tickets.empty?
+    redirect_to root_path, notice: "There are no tickets available for #{@conference.title}!" if @tickets.empty?
-      redirect_to root_path, notice: "There are no tickets available for #{@conference.title}!"
-    end
   end
 end

app/controllers/tracks_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class TracksController < ApplicationController
   load_resource :conference, find_by: :short_title
   load_resource :program, through: :conference, singleton: true
@@ -29,7 +31,7 @@ class TracksController < ApplicationController
   end
 
   def update
-    if @track.update_attributes(track_params)
+    if @track.update(track_params)
       redirect_to conference_program_tracks_path(conference_id: @conference.short_title),
                   notice: 'Track request successfully updated.'
     else

app/controllers/users/omniauth_callbacks_controller.rb

@@ -1,6 +1,8 @@
+# frozen_string_literal: true
+
 module Users
   class OmniauthCallbacksController < Devise::OmniauthCallbacksController
-    skip_before_filter :verify_authenticity_token
+    skip_before_action :verify_authenticity_token
     skip_authorization_check
 
     User.omniauth_providers.each do |provider|
@@ -11,7 +13,7 @@ module Users
 
     def handle(provider)
       auth_hash = request.env['omniauth.auth']
-      unless auth_hash.info.email.present?
+      if auth_hash.info.email.blank?
         flash[:error] = "Email field is missing in your #{provider} account"
         redirect_to new_user_registration_path
         return
@@ -27,15 +29,13 @@ module Users
 
       begin
         user.save!
-        if openid.user != user
+        openid.user = user if openid.user != user
-          openid.user = user
-        end
         openid.save!
 
         sign_in user
         redirect_to request.env['omniauth.origin'] || root_path,
                     notice: "#{user.email} signed in successfully with #{provider}"
-      rescue => e
+      rescue StandardError => e
         flash[:error] = e.message
         redirect_back_or_to new_user_registration_path
       end

app/controllers/users_controller.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class UsersController < ApplicationController
   load_and_authorize_resource
 
@@ -7,8 +9,7 @@ class UsersController < ApplicationController
   end
 
   # GET /users/1/edit
-  def edit
+  def edit; end
-  end
 
   # PATCH/PUT /users/1
   def update

app/helpers/admin/volunteers_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Admin
   module VolunteersHelper
     def can_manage_volunteers?(conference)

app/helpers/application_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ApplicationHelper
   # Returns a string build from the start and end date of the given conference.
   #
@@ -60,7 +62,7 @@ module ApplicationHelper
   end
 
   def difficulty_levels(conference)
-    all = conference.program.difficulty_levels.map {|t| t.title}
+    all = conference.program.difficulty_levels.map(&:title)
     first = all[0...-1]
     last = all[-1]
     ts = ''
@@ -83,16 +85,14 @@ module ApplicationHelper
   # Output will be 'title, description and conference'
   def updated_attributes(version)
     version.changeset
-      .reject{ |_, values| values[0].blank? && values[1].blank? }
+           .reject { |_, values| values[0].blank? && values[1].blank? }
-      .keys.map{ |key| key.gsub('_id', '').tr('_', ' ')}.join(', ')
+           .keys.map { |key| key.gsub('_id', '').tr('_', ' ') }.join(', ')
            .reverse.sub(',', ' dna ').reverse
   end
 
   def normalize_array_length(hashmap, length)
     hashmap.each_value do |value|
-      if value.length < length
+      value.fill(value[-1], value.length...length) if value.length < length
-        value.fill(value[-1], value.length...length)
-      end
     end
   end
 
@@ -115,28 +115,26 @@ module ApplicationHelper
     other_event_schedules.each do |other_event_schedule|
       next unless other_event_schedule.event.confirmed?
       other_event_time_range = (other_event_schedule.start_time.strftime '%Y-%m-%d %H:%M')...(other_event_schedule.end_time.strftime '%Y-%m-%d %H:%M')
-      if (event_time_range.to_a & other_event_time_range.to_a).present?
+      concurrent_events << other_event_schedule.event if (event_time_range.to_a & other_event_time_range.to_a).present?
-        concurrent_events << other_event_schedule.event
-      end
     end
     concurrent_events
   end
 
   def speaker_links(event)
-    safe_join(event.speakers.map{ |speaker| link_to speaker.name, admin_user_path(speaker) }, ',')
+    safe_join(event.speakers.map { |speaker| link_to speaker.name, admin_user_path(speaker) }, ',')
   end
 
   def speaker_selector_input(form)
-    users = User.active.pluck(:id, :name, :username, :email).map { |user| [user[0], user[1].blank? ? user[2] : user[1], user[2], user[3]] }.sort_by { |user| user[1].downcase }
+    users = User.active.pluck(:id, :name, :username, :email).map { |user| [user[0], user[1].presence || user[2], user[2], user[3]] }.sort_by { |user| user[1].downcase }
     form.input :speakers, as: :select,
-                          collection: options_for_select(users.map {|user| ["#{user[1]} (#{user[2]}) #{user[3]}", user[0]]}, @event.speakers.map(&:id)),
+                          collection: options_for_select(users.map { |user| ["#{user[1]} (#{user[2]}) #{user[3]}", user[0]] }, @event.speakers.map(&:id)),
                           include_blank: false, label: 'Speakers', input_html: { class: 'select-help-toggle', multiple: 'true' }
   end
 
   def responsibles_selector_input(form)
-    users = User.active.pluck(:id, :name, :username, :email).map { |user| [user[0], user[1].blank? ? user[2] : user[1], user[2], user[3]] }.sort_by { |user| user[1].downcase }
+    users = User.active.pluck(:id, :name, :username, :email).map { |user| [user[0], user[1].presence || user[2], user[2], user[3]] }.sort_by { |user| user[1].downcase }
     form.input :responsibles, as: :select,
-                              collection: options_for_select(users.map {|user| ["#{user[1]} (#{user[2]}) #{user[3]}", user[0]]}, @booth.responsibles.map(&:id)),
+                              collection: options_for_select(users.map { |user| ["#{user[1]} (#{user[2]}) #{user[3]}", user[0]] }, @booth.responsibles.map(&:id)),
                               include_blank: false, label: 'Responsibles', input_html: { class: 'select-help-toggle', multiple: 'true' },
                               hint: 'The people responsible for the booth. You can only select existing users.'
   end
@@ -154,9 +152,7 @@ module ApplicationHelper
   end
 
   def rescheduling_hint(affected_event_count)
-    if affected_event_count > 0
+    "You have #{affected_event_count} scheduled #{'event'.pluralize(affected_event_count)}. Changing the conference hours will unschedule those scheduled outside the conference hours." if affected_event_count > 0
-      "You have #{affected_event_count} scheduled #{'event'.pluralize(affected_event_count)}. Changing the conference hours will unschedule those scheduled outside the conference hours."
-    end
   end
 
   ##

app/helpers/conference_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module ConferenceHelper
   # Return true if only call_for_papers or call_for_tracks or call_for_booths is open
   def one_call_open(*calls)
@@ -6,7 +8,7 @@ module ConferenceHelper
   # Return true if exactly two of those calls are open: call_for_papers , call_for_tracks , call_for_booths
 
   def two_calls_open(*calls)
-    calls.count{ |call| call.try(:open?) } == 2
+    calls.count { |call| call.try(:open?) } == 2
   end
 
   # URL for sponsorship emails

app/helpers/date_time_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module DateTimeHelper
   ##
   # Includes functions related to date or time manipulations

app/helpers/events_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module EventsHelper
   ##
   # Includes functions related to events

app/helpers/format_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module FormatHelper
   ##
   # Includes functions related to formatting (like adding classes, colors)
@@ -44,9 +46,8 @@ module FormatHelper
   def target_progress_color(progress)
     progress = progress.to_i
     result =
-    case
+      if progress >= 90 then 'green'
-    when progress >= 90 then 'green'
+      elsif progress < 90 && progress >= 80 then 'orange'
-    when progress < 90 && progress >= 80 then 'orange'
       else 'red'
       end
 
@@ -55,12 +56,12 @@ module FormatHelper
 
   def days_left_color(days_left)
     days_left = days_left.to_i
-    if days_left > 30
+    result = if days_left > 30
-      result = 'green'
+               'green'
              elsif days_left < 30 && days_left > 10
-      result = 'orange'
+               'orange'
              else
-      result = 'red'
+               'red'
              end
     result
   end
@@ -116,7 +117,7 @@ module FormatHelper
   end
 
   def word_pluralize(count, singular, plural = nil)
-    word = if (count == 1 || count =~ /^1(\.0+)?$/)
+    word = if count == 1 || count =~ /^1(\.0+)?$/
              singular
            else
              plural || singular.pluralize
@@ -134,7 +135,7 @@ module FormatHelper
     g = hexcolor[3..4].to_i(16)
     b = hexcolor[5..6].to_i(16)
     yiq = ((r * 299) + (g * 587) + (b * 114)) / 1000
-    (yiq >= 128) ? 'black' : 'white'
+    yiq >= 128 ? 'black' : 'white'
   end
 
   def td_height(rooms)
@@ -178,17 +179,15 @@ module FormatHelper
     item_class = 'item'
     item_class += ' first' if number == 0
     item_class += ' last' if number == (carousel_number - 1)
-    if (col && ((col / num_cols) == number)) || (!col && number == 0)
+    item_class += ' active' if (col && ((col / num_cols) == number)) || (!col && number == 0)
-      item_class += ' active'
-    end
     item_class
   end
 
   def selected_scheduled?(schedule)
-    (schedule == @selected_schedule) ? 'Yes' : 'No'
+    schedule == @selected_schedule ? 'Yes' : 'No'
   end
 
-  def markdown(text, escape_html=true)
+  def markdown(text, escape_html = true)
     return '' if text.nil?
 
     options = {
@@ -200,7 +199,7 @@ module FormatHelper
     markdown.render(text).html_safe
   end
 
-  def markdown_hint(text='')
+  def markdown_hint(text = '')
     markdown("#{text} Please look at #{link_to '**Markdown Syntax**', 'https://daringfireball.net/projects/markdown/syntax', target: '_blank'} to format your text", false)
   end
 

app/helpers/paths_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module PathsHelper
   ##
   # Includes functions related to links or redirects

app/helpers/users_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module UsersHelper
   ##
   # Includes functions related to users
@@ -12,10 +14,8 @@ module UsersHelper
     Devise.omniauth_providers.each do |provider|
       provider_key = "#{provider}_key"
       provider_secret = "#{provider}_secret"
-      unless Rails.application.secrets.send(provider_key).blank? || Rails.application.secrets.send(provider_secret).blank?
+      providers << provider unless Rails.application.secrets.send(provider_key).blank? || Rails.application.secrets.send(provider_secret).blank?
-        providers << provider
+      providers << provider if ENV["OSEM_#{provider.upcase}_KEY"].present? && ENV["OSEM_#{provider.upcase}_SECRET"].present?
-      end
-      providers << provider if !ENV["OSEM_#{provider.upcase}_KEY"].blank? && !ENV["OSEM_#{provider.upcase}_SECRET"].blank?
     end
 
     providers.uniq
@@ -25,6 +25,6 @@ module UsersHelper
   # Outputs the roles of a user, including the conferences for which the user has the roles
   # Eg. organizer(oSC13, oSC14), cfp(oSC12, oSC13)
   def show_roles(roles)
-    roles.map{ |x| x[0].titleize + ' (' + x[1].join(', ') + ')' }.join ', '
+    roles.map { |x| x[0].titleize + ' (' + x[1].join(', ') + ')' }.join ', '
   end
 end

app/helpers/versions_helper.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module VersionsHelper
   ##
   # Groups functions related to change description
@@ -119,10 +121,9 @@ module VersionsHelper
   end
 
   def event_change_description(version)
-    case
+    if version.event == 'create' then 'submitted new'
-    when version.event == 'create' then 'submitted new'
 
-    when version.changeset['state']
+    elsif version.changeset['state']
       case version.changeset['state'][1]
       when 'unconfirmed' then 'accepted'
       when 'withdrawn' then 'withdrew'

app/jobs/application_job.rb

@@ -1,2 +1,4 @@
+# frozen_string_literal: true
+
 class ApplicationJob < ActiveJob::Base
 end

app/jobs/conference_cfp_update_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferenceCfpUpdateMailJob < ApplicationJob
   queue_as :default
 

app/jobs/conference_date_update_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferenceDateUpdateMailJob < ApplicationJob
   queue_as :default
 

app/jobs/conference_registration_date_update_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferenceRegistrationDateUpdateMailJob < ApplicationJob
   queue_as :default
 

app/jobs/conference_schedule_update_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferenceScheduleUpdateMailJob < ApplicationJob
   queue_as :default
 

app/jobs/conference_venue_update_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ConferenceVenueUpdateMailJob < ApplicationJob
   queue_as :default
 

app/jobs/event_comment_mail_job.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EventCommentMailJob < ApplicationJob
   queue_as :default
 

app/mailers/mailbot.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Mailbot < ActionMailer::Base
   def registration_mail(conference, user)
     mail(to: user.email,

app/models/ability.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Ability
   include CanCan::Ability
 
@@ -15,7 +17,7 @@ class Ability
 
   # Abilities for not signed in users (guests)
   def not_signed_in
-    can [:index, :conferences], Organization
+    can %i[index conferences], Organization
     can [:index], Conference
     can [:show], Conference do |conference|
       conference.splashpage && conference.splashpage.public == true
@@ -31,20 +33,16 @@ class Ability
 
     # can view Commercials of confirmed Events
     can :show, Commercial, commercialable_type: 'Event', commercialable_id: Event.where(state: 'confirmed').pluck(:id)
-    can [:show, :create], User
+    can %i[show create], User
     unless ENV['OSEM_ICHAIN_ENABLED'] == 'true'
-      can :show, Registration do |registration|
+      can :show, Registration, &:new_record?
-        registration.new_record?
-      end
 
       can [:new, :create], Registration do |registration|
         conference = registration.conference
         conference.registration_open? && registration.new_record? && !conference.registration_limit_exceeded?
       end
 
-      can :show, Event do |event|
+      can :show, Event, &:new_record?
-        event.new_record?
-      end
 
       can [:new, :create], Event do |event|
         event.program.cfp_open? && event.new_record?
@@ -78,8 +76,8 @@ class Ability
     can :index, Organization
     can :index, Ticket
     can :manage, TicketPurchase, user_id: user.id
-    can [:new, :create], Payment, user_id: user.id
+    can %i[new create], Payment, user_id: user.id
-    can [:index, :show], PhysicalTicket, user: user
+    can %i[index show], PhysicalTicket, user: user
 
     can [:new, :create], Booth do |booth|
       booth.new_record? && booth.conference.program.cfps.for_booths.try(:open?)
@@ -89,7 +87,7 @@ class Ability
       booth.users.include?(user)
     end
 
-    can [:create, :destroy], Subscription, user_id: user.id
+    can %i[create destroy], Subscription, user_id: user.id
 
     can [:new, :create], Event do |event|
       event.program.cfp_open? && event.new_record?
@@ -108,7 +106,7 @@ class Ability
       track.new_record? && track.program.cfps.for_tracks.try(:open?)
     end
 
-    can [:index, :show, :restart, :confirm, :withdraw], Track, submitter_id: user.id
+    can %i[index show restart confirm withdraw], Track, submitter_id: user.id
 
     can [:edit, :update], Track do |track|
       user == track.submitter && !(track.accepted? || track.confirmed?)

app/models/admin_ability.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class AdminAbility
   include CanCan::Ability
 
@@ -28,12 +30,12 @@ class AdminAbility
       conference.registration_open? && !conference.registration_limit_exceeded? || conference.program.speakers.confirmed.include?(user)
     end
 
-    can [:index, :admins], Organization
+    can %i[index admins], Organization
     can :index, Ticket
     can :manage, TicketPurchase, user_id: user.id
-    can [:new, :create], Payment, user_id: user.id
+    can %i[new create], Payment, user_id: user.id
 
-    can [:create, :destroy], Subscription, user_id: user.id
+    can %i[create destroy], Subscription, user_id: user.id
 
     can [:new, :create], Event do |event|
       event.program.cfp_open? && event.new_record?
@@ -45,11 +47,11 @@ class AdminAbility
     can [:destroy], Openid
     can :access, Admin
     can :index, Commercial, commercialable_type: 'Conference'
-    cannot [:edit, :update, :destroy], Question, global: true
+    cannot %i[edit update destroy], Question, global: true
     # for admins
     can :manage, :all if user.is_admin
     # even admin cannot create new users with ICHAIN enabled
-    cannot [:new, :create], User if ENV['OSEM_ICHAIN_ENABLED'] == 'true'
+    cannot %i[new create], User if ENV['OSEM_ICHAIN_ENABLED'] == 'true'
     cannot :revert_object, PaperTrail::Version do |version|
       (version.event == 'create' && %w[Conference User Event].include?(version.item_type))
     end
@@ -67,9 +69,7 @@ class AdminAbility
     end
 
     # Prevent requests for tracks from being destroyed
-    cannot :destroy, Track do |track|
+    cannot :destroy, Track, &:self_organized?
-      track.self_organized?
-    end
     # Can't accept a booth when booth_limit is reached
     cannot :accept, Booth do |booth|
       conference = booth.conference
@@ -92,10 +92,10 @@ class AdminAbility
     org_ids_for_organization_admin = Organization.with_role(:organization_admin, user).pluck(:id)
     conf_ids_for_organization_admin = Conference.where(organization_id: org_ids_for_organization_admin).pluck(:id)
 
-    can [:read, :update, :destroy, :assign_org_admins, :unassign_org_admins, :admins], Organization, id: org_ids_for_organization_admin
+    can %i[read update destroy assign_org_admins unassign_org_admins admins], Organization, id: org_ids_for_organization_admin
     can :new, Conference
     can :manage, Conference, organization_id: org_ids_for_organization_admin
-    can [:index, :show], Role
+    can %i[index show], Role
 
     signed_in_with_organizer_role(user, conf_ids_for_organization_admin)
   end
@@ -108,7 +108,7 @@ class AdminAbility
     track_ids = Track.joins(:program).where('programs.conference_id IN (?)', conf_ids).pluck(:id)
 
     can :manage, Resource, conference_id: conf_ids
-    can [:read, :update, :destroy], Conference, id: conf_ids
+    can %i[read update destroy], Conference, id: conf_ids
     can :manage, Splashpage, conference_id: conf_ids
     can :manage, Contact, conference_id: conf_ids
     can :manage, EmailSettings, conference_id: conf_ids
@@ -163,8 +163,8 @@ class AdminAbility
         role.resource_type == 'Track' && (track_ids.include? role.resource_id)
     end
 
-    can [:index, :revert_object, :revert_attribute], PaperTrail::Version, item_type: 'User'
+    can %i[index revert_object revert_attribute], PaperTrail::Version, item_type: 'User'
-    can [:index, :revert_object, :revert_attribute], PaperTrail::Version, conference_id: conf_ids
+    can %i[index revert_object revert_attribute], PaperTrail::Version, conference_id: conf_ids
   end
 
   def signed_in_with_cfp_role(user)
@@ -174,7 +174,7 @@ class AdminAbility
     can :show, Conference do |conf|
       conf_ids_for_cfp.include?(conf.id)
     end
-    can [:index, :show, :update], Resource, conference_id: conf_ids_for_cfp
+    can %i[index show update], Resource, conference_id: conf_ids_for_cfp
     can :manage, Booth, conference_id: conf_ids_for_cfp
     can :manage, Event, program: { conference_id: conf_ids_for_cfp }
     can :manage, EventType, program: { conference_id: conf_ids_for_cfp }
@@ -203,7 +203,7 @@ class AdminAbility
         (Conference.with_role(:cfp, user).pluck(:id).include? role.resource_id)
     end
 
-    can [:index, :revert_object, :revert_attribute], PaperTrail::Version,
+    can %i[index revert_object revert_attribute], PaperTrail::Version,
         item_type: %w[Event EventType Track DifficultyLevel EmailSettings Room Cfp Program Comment], conference_id: conf_ids_for_cfp
     can [:index, :revert_object, :revert_attribute], PaperTrail::Version,
         ["item_type = 'Commercial' AND conference_id IN (?) AND (object LIKE '%Event%' OR object_changes LIKE '%Event%')", conf_ids_for_cfp] do |version|
@@ -219,7 +219,7 @@ class AdminAbility
     can :show, Conference do |conf|
       conf_ids_for_info_desk.include?(conf.id)
     end
-    can [:index, :show, :update], Resource, conference_id: conf_ids_for_info_desk
+    can %i[index show update], Resource, conference_id: conf_ids_for_info_desk
     can :manage, Registration, conference_id: conf_ids_for_info_desk
     can :manage, Question, conference_id: conf_ids_for_info_desk
     can :manage, Question do |question|
@@ -240,7 +240,7 @@ class AdminAbility
       role.resource_type == 'Conference' && role.name == 'info_desk' &&
         (Conference.with_role(:info_desk, user).pluck(:id).include? role.resource_id)
     end
-    can [:index, :revert_object, :revert_attribute], PaperTrail::Version, item_type: 'Registration', conference_id: conf_ids_for_info_desk
+    can %i[index revert_object revert_attribute], PaperTrail::Version, item_type: 'Registration', conference_id: conf_ids_for_info_desk
   end
 
   def signed_in_with_volunteers_coordinator_role(user)
@@ -250,7 +250,7 @@ class AdminAbility
     can :show, Conference do |conf|
       conf_ids_for_volunteers_coordinator.include?(conf.id)
     end
-    can [:index, :show, :update], Resource, conference_id: conf_ids_for_volunteers_coordinator
+    can %i[index show update], Resource, conference_id: conf_ids_for_volunteers_coordinator
     can :manage, Vposition, conference_id: conf_ids_for_volunteers_coordinator
     can :manage, Vday, conference_id: conf_ids_for_volunteers_coordinator
 
@@ -286,9 +286,7 @@ class AdminAbility
 
     can :manage, Track, id: track_ids_for_track_organizer
 
-    cannot [:edit, :update], Track do |track|
+    cannot %i[edit update], Track, &:self_organized_and_accepted_or_confirmed?
-      track.self_organized_and_accepted_or_confirmed?
-    end
 
     # Show Roles in the admin sidebar and allow authorization of the index action
     can [:index, :show], Role do |role|

app/models/ahoy/event.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Ahoy
   class Event < ApplicationRecord
     self.table_name = 'ahoy_events'

app/models/answer.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Answer < ApplicationRecord
   has_many :qanswers
   has_many :questions, through: :qanswers

app/models/application_record.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class ApplicationRecord < ActiveRecord::Base
   self.abstract_class = true
 end

app/models/booth.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Booth < ApplicationRecord
   include ActiveRecord::Transitions
   has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }
@@ -41,28 +43,28 @@ class Booth < ApplicationRecord
     state :confirmed
 
     event :restart do
-      transitions to: :new, from: [:withdrawn, :rejected, :canceled]
+      transitions to: :new, from: %i[withdrawn rejected canceled]
     end
     event :withdraw do
-      transitions to: :withdrawn, from: [:new, :to_accept, :accepted, :to_reject, :rejected, :confirmed]
+      transitions to: :withdrawn, from: %i[new to_accept accepted to_reject rejected confirmed]
     end
     event :confirm do
       transitions to: :confirmed, from: [:accepted]
     end
     event :to_accept do
-      transitions to: :to_accept, from: [:new, :to_reject]
+      transitions to: :to_accept, from: %i[new to_reject]
     end
     event :to_reject do
-      transitions to: :to_reject, from: [:new, :to_accept]
+      transitions to: :to_reject, from: %i[new to_accept]
     end
     event :accept do
-      transitions to: :accepted, from: [:new, :to_accept]
+      transitions to: :accepted, from: %i[new to_accept]
     end
     event :reject do
-      transitions to: :rejected, from: [:new, :to_reject]
+      transitions to: :rejected, from: %i[new to_reject]
     end
     event :cancel do
-      transitions to: :canceled, from: [:accepted, :rejected, :to_accept, :to_reject, :confirmed]
+      transitions to: :canceled, from: %i[accepted rejected to_accept to_reject confirmed]
     end
   end
 

app/models/booth_request.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class BoothRequest < ApplicationRecord
   belongs_to :booth
   belongs_to :user

app/models/campaign.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Campaign < ApplicationRecord
   validates :name, :utm_campaign, presence: true
 
@@ -66,11 +68,11 @@ class Campaign < ApplicationRecord
   # * +Hash+ -> parameter => value
   def get_parameters
     conditions = {}
-    conditions[:utm_source] = self[:utm_source] unless self[:utm_source].blank?
+    conditions[:utm_source] = self[:utm_source] if self[:utm_source].present?
-    conditions[:utm_medium] = self[:utm_medium] unless self[:utm_medium].blank?
+    conditions[:utm_medium] = self[:utm_medium] if self[:utm_medium].present?
-    conditions[:utm_term] = self[:utm_term] unless self[:utm_term].blank?
+    conditions[:utm_term] = self[:utm_term] if self[:utm_term].present?
-    conditions[:utm_content] = self[:utm_content] unless self[:utm_content].blank?
+    conditions[:utm_content] = self[:utm_content] if self[:utm_content].present?
-    conditions[:utm_campaign] = self[:utm_campaign] unless self[:utm_campaign].blank?
+    conditions[:utm_campaign] = self[:utm_campaign] if self[:utm_campaign].present?
     conditions
   end
 end

app/models/cfp.rb

@@ -1,7 +1,9 @@
+# frozen_string_literal: true
+
 # cannot delete program if there are events submitted
 
 class Cfp < ApplicationRecord
-  TYPES = %w(events booths tracks).freeze
+  TYPES = %w[events booths tracks].freeze
 
   has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }
   belongs_to :program
@@ -27,11 +29,11 @@ class Cfp < ApplicationRecord
   # * +True+ -> If cfp dates is updated and all other parameters are set
   # * +False+ -> Either cfp date is not updated or one or more parameter is not set
   def notify_on_cfp_date_update?
-    !end_date.blank? && !start_date.blank?\
+    end_date.present? && start_date.present?\
     && (start_date_changed? || end_date_changed?)\
     && program.conference.email_settings.send_on_cfp_dates_updated\
-    && !program.conference.email_settings.cfp_dates_updated_subject.blank?\
+    && program.conference.email_settings.cfp_dates_updated_subject.present?\
-    && !program.conference.email_settings.cfp_dates_updated_body.blank?
+    && program.conference.email_settings.cfp_dates_updated_body.present?
   end
 
   ##
@@ -106,20 +108,22 @@ class Cfp < ApplicationRecord
   private
 
   def before_end_of_conference
-    if program && program.conference && program.conference.end_date && end_date && (end_date > program.conference.end_date)
+    if program&.conference && program.conference.end_date && end_date && (end_date > program.conference.end_date)
       errors
         .add(:end_date, "can't be after the conference end date (#{program.conference.end_date})")
     end
 
-    if program && program.conference && program.conference.end_date && start_date && (start_date > program.conference.end_date)
+    if program&.conference && program.conference.end_date && start_date && (start_date > program.conference.end_date)
       errors
         .add(:start_date, "can't be after the conference end date (#{program.conference.end_date})")
     end
   end
 
   def start_after_end_date
+    if start_date && end_date && start_date > end_date
       errors
-    .add(:start_date, "can't be after the end date") if start_date && end_date && start_date > end_date
+        .add(:start_date, "can't be after the end date")
+    end
   end
 
   def conference_id

app/models/comment.rb

@@ -1,19 +1,21 @@
+# frozen_string_literal: true
+
 class Comment < ApplicationRecord
-  acts_as_nested_set scope: %i(commentable_id commentable_type)
+  acts_as_nested_set scope: %i[commentable_id commentable_type]
   validates :body, presence: true
   validates :user, presence: true
   after_create :send_notification
 
   # NOTE: install the acts_as_votable plugin if you
   # want user to vote on the quality of comments.
-  #acts_as_votable
+  # acts_as_votable
 
   belongs_to :commentable, counter_cache: true, polymorphic: true
 
   # NOTE: Comments belong to a user
   belongs_to :user
 
-  has_paper_trail on: %i(create destroy), meta: { conference_id: :conference_id }
+  has_paper_trail on: %i[create destroy], meta: { conference_id: :conference_id }
 
   # Helper class method that allows you to build a comment
   # by passing a commentable object, a user_id, and comment text
@@ -25,7 +27,7 @@ class Comment < ApplicationRecord
       user_id: user_id
   end
 
-  #helper method to check if a comment has children
+  # helper method to check if a comment has children
   def has_children?
     children.any?
   end

app/models/commercial.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Commercial < ApplicationRecord
   require 'oembed'
 
@@ -6,7 +8,7 @@ class Commercial < ApplicationRecord
   has_paper_trail ignore: [:updated_at], meta: { conference_id: :conference_id }
 
   validates :url, presence: true, uniqueness: { scope: :commercialable }
-  validates :url, format: URI::regexp(%w(http https))
+  validates :url, format: URI.regexp(%w[http https])
 
   validate :valid_url
 
@@ -36,9 +38,7 @@ class Commercial < ApplicationRecord
       errors[:no_event] << id && next unless event
 
       commercial = event.commercials.new(url: url)
-      unless commercial.save
+      errors[:validation_errors] << "Could not create commercial for event with ID #{event.id} (" + commercial.errors.full_messages.to_sentence + ')' unless commercial.save
-        errors[:validation_errors] << "Could not create commercial for event with ID #{event.id} (" + commercial.errors.full_messages.to_sentence + ')'
-      end
     end
     errors
   end
@@ -47,9 +47,7 @@ class Commercial < ApplicationRecord
 
   def valid_url
     result = Commercial.render_from_url(url)
-    if result[:error]
+    errors.add(:base, result[:error]) if result[:error]
-      errors.add(:base, result[:error])
-    end
   end
 
   def self.register_provider

app/models/concerns/revision_count.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module RevisionCount
   extend ActiveSupport::Concern
 

app/models/conference.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Conference < ApplicationRecord
   include RevisionCount
   require 'uri'
@@ -12,7 +14,7 @@ class Conference < ApplicationRecord
 
   belongs_to :organization
 
-  has_paper_trail ignore: %i(updated_at guid revision events_per_week), meta: { conference_id: :id }
+  has_paper_trail ignore: %i[updated_at guid revision events_per_week], meta: { conference_id: :id }
 
   has_and_belongs_to_many :questions
 
@@ -91,7 +93,7 @@ class Conference < ApplicationRecord
   after_create :create_free_ticket
   after_update :delete_event_schedules
 
-  enum ticket_layout: [:portrait, :landscape]
+  enum ticket_layout: %i[portrait landscape]
 
   ##
   # Checks if the user is registered to the conference
@@ -101,7 +103,7 @@ class Conference < ApplicationRecord
   # ====Returns
   # * +false+ -> If the user is registered
   # * +true+ - If the user isn't registered
-  def user_registered? user
+  def user_registered?(user)
     user.present? && registrations.where(user_id: user.id).count > 0
   end
 
@@ -151,7 +153,7 @@ class Conference < ApplicationRecord
   def get_submissions_per_week
     result = []
 
-    if program && program.cfp && program.events
+    if program&.cfp && program.events
       submissions = program.events.select(:week).group(:week).order(:week).count
       start_week = program.cfp.start_week
       weeks = program.cfp.weeks
@@ -168,7 +170,7 @@ class Conference < ApplicationRecord
   #  * +Array+ -> e.g. 'Submitted' => [0, 3, 3, 5]  -> first week 0 events, second week 3 events.
   def get_submissions_data
     result = {}
-    if program && program.cfp && program.events
+    if program&.cfp && program.events
       result = get_events_per_week_by_state
 
       start_week = program.cfp.start_week
@@ -269,8 +271,7 @@ class Conference < ApplicationRecord
   def registration_weeks
     result = 0
     weeks = 0
-    if registration_period &&
+    if registration_period&.start_date &&
-        registration_period.start_date &&
        registration_period.end_date
       weeks = Date.new(registration_period.start_date.year, 12, 31)
                   .strftime('%W').to_i
@@ -343,7 +344,7 @@ class Conference < ApplicationRecord
       tracks: tracks_set?,
       event_types: event_types_set?,
       difficulty_levels: difficulty_levels_set?,
-      splashpage: splashpage && splashpage.public?
+      splashpage: splashpage&.public?
     }
 
     result.update(
@@ -671,9 +672,7 @@ class Conference < ApplicationRecord
         result[state.name] = count
       end
 
-      unless conference.events_per_week
+      conference.events_per_week = {} unless conference.events_per_week
-        conference.events_per_week = {}
-      end
 
       # Write to database
       conference.events_per_week[week] = result
@@ -785,7 +784,7 @@ class Conference < ApplicationRecord
   # the color. We make use of big prime numbers to avoid repetition and to make
   # consecutive colors clearly different.
   def next_color_component(component, i)
-    big_prime_numbers = {r: 113, g: 67, b: 151}
+    big_prime_numbers = { r: 113, g: 67, b: 151 }
     ((i * big_prime_numbers[component]) % 239 + 16).to_s(16)
   end
 
@@ -861,14 +860,11 @@ class Conference < ApplicationRecord
     # Completed weeks
     events_per_week.each do |week, values|
       values.each do |state, value|
-        if %i(confirmed unconfirmed).include?(state)
+        next unless %i[confirmed unconfirmed].include?(state)
-          unless result[state.to_s.capitalize]
+        result[state.to_s.capitalize] = {} unless result[state.to_s.capitalize]
-            result[state.to_s.capitalize] = {}
-          end
         result[state.to_s.capitalize][week.strftime('%W').to_i] = value
       end
     end
-    end
 
     # Actual week
     this_week = Date.today.end_of_week.strftime('%W').to_i
@@ -923,9 +919,7 @@ class Conference < ApplicationRecord
   # * +Array+
   def pad_left(first_week, start_week)
     left = []
-    if first_week > start_week
+    left = Array.new(first_week - start_week - 1, 0) if first_week > start_week
-      left = Array.new(first_week - start_week - 1, 0)
-    end
     left
   end
 
@@ -938,9 +932,7 @@ class Conference < ApplicationRecord
   def assert_keys_are_continuously(hash)
     keys = hash.keys
     (keys.min..keys.max).each do |key|
-      unless hash[key]
+      hash[key] = 0 unless hash[key]
-        hash[key] = 0
-      end
     end
     Hash[hash.sort]
   end
@@ -1048,13 +1040,12 @@ class Conference < ApplicationRecord
 
     grouped.each do |event|
       object = event.send(symbol)
-      if object
+      next unless object
       result[object.title] = {
         'value' => counter[object.id],
         'color' => object.color
       }
     end
-    end
     result
   end
 
@@ -1067,13 +1058,12 @@ class Conference < ApplicationRecord
   def calculate_track_distribution_hash(tracks_grouped, tracks_counter)
     result = {}
     tracks_grouped.each do |event|
-      if event.track
+      next unless event.track
       result[event.track.name] = {
         'value' => tracks_counter[event.track_id],
         'color' => event.track.color
       }
     end
-    end
     result
   end
 
@@ -1145,9 +1135,7 @@ class Conference < ApplicationRecord
     counter.each do |key, value|
       # make PG happy by including the user_id in ORDER
       submitter = submitters.where(user_id: key).order(:user_id).first
-      if submitter
+      result[submitter.user] = value if submitter
-        result[submitter.user] = value
-      end
     end
     result
   end
@@ -1165,9 +1153,9 @@ class Conference < ApplicationRecord
   #
   def generate_guid
     guid = SecureRandom.urlsafe_base64
-#     begin
+    #     begin
-#       guid = SecureRandom.urlsafe_base64
+    #       guid = SecureRandom.urlsafe_base64
-#     end while User.where(:guid => guid).exists?
+    #     end while User.where(:guid => guid).exists?
     self.guid = guid
   end
 
@@ -1175,19 +1163,17 @@ class Conference < ApplicationRecord
   # Adds a random color to the conference
   #
   def add_color
-    unless color
+    self.color = get_color unless color
-      self.color = get_color
-    end
   end
 
   def get_color
-    %w(
+    %w[
       #000000 #0000FF #00FF00 #FF0000 #FFFF00 #9900CC
       #CC0066 #00FFFF #FF00FF #C0C0C0 #00008B #FFD700
       #FFA500 #FF1493 #FF00FF #F0FFFF #EE82EE #D2691E
       #C0C0C0 #A52A2A #9ACD32 #9400D3 #8B008B #8B0000
       #87CEEB #808080 #800080 #008B8B #006400
-      ).sample
+    ].sample
   end
 
   # Calculates items per week from a hash.
@@ -1206,9 +1192,7 @@ class Conference < ApplicationRecord
 
     items.each do |key, value|
       # Padding
-      if last_key < (key.to_i - 1)
+      result += Array.new(key.to_i - last_key - 1, sum) if last_key < (key.to_i - 1)
-        result += Array.new(key.to_i - last_key - 1, sum)
-      end
 
       sum += value
       result.push(sum)
@@ -1216,9 +1200,7 @@ class Conference < ApplicationRecord
     end
 
     # Padding right
-    if result.length < weeks
+    result += Array.new(weeks - result.length, sum) if result.length < weeks
-      result += Array.new(weeks - result.length, sum)
-    end
 
     result
   end

app/models/contact.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class Contact < ApplicationRecord
   has_paper_trail on: [:update], ignore: [:updated_at], meta: { conference_id: :conference_id }
 
@@ -6,7 +8,7 @@ class Contact < ApplicationRecord
   validates :conference, presence: true
   # Conferences only have one contact
   validates :facebook, :twitter, :googleplus, :instagram, :mastodon,
-            format: URI::regexp(%w(http https)), allow_blank: true
+            format: URI.regexp(%w[http https]), allow_blank: true
 
   def has_social_media?
     return true if facebook.present? || twitter.present? || googleplus.present? || instagram.present? || mastodon.present? || email.present?

app/models/difficulty_level.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class DifficultyLevel < ApplicationRecord
   belongs_to :program, touch: true
   has_many :events, dependent: :nullify

app/models/email_settings.rb

@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class EmailSettings < ApplicationRecord
   belongs_to :conference
 
@@ -11,12 +13,15 @@ class EmailSettings < ApplicationRecord
       'conference_start_date' => conference.start_date,
       'conference_end_date' => conference.end_date,
       'registrationlink' => Rails.application.routes.url_helpers.conference_conference_registration_url(
-                            conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')),
+        conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')
+      ),
       'conference_splash_link' => Rails.application.routes.url_helpers.conference_url(
-                                  conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')),
+        conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')
+      ),
 
       'schedule_link' => Rails.application.routes.url_helpers.conference_schedule_url(
-                         conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000'))
+        conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')
+      )
     }
 
     if conference.program.cfp
@@ -43,12 +48,11 @@ class EmailSettings < ApplicationRecord
     if event
       h['eventtitle'] = event.title
       h['proposalslink'] = Rails.application.routes.url_helpers.conference_program_proposals_url(
-                           conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000'))
+        conference.short_title, host: (ENV['OSEM_HOSTNAME'] || 'localhost:3000')
+      )
     end
 
-    if booth
+    h['booth_title'] = booth.title if booth
-      h['booth_title'] = booth.title
-    end
     h
   end
 
@@ -71,8 +75,8 @@ class EmailSettings < ApplicationRecord
 
   def parse_template(text, values)
     values.each do |key, value|
-      if value.kind_of?(Date)
+      if value.is_a?(Date)
-        text = text.gsub "{#{key}}", value.strftime('%Y-%m-%d') unless text.blank?
+        text = text.gsub "{#{key}}", value.strftime('%Y-%m-%d') if text.present?
       else
         text = text.gsub "{#{key}}", value unless text.blank? || value.blank?
       end