Introduce Booths and Call for Booths to OSEM

app/models/booth.rb

@@ -0,0 +1,16 @@
+class Booth < ActiveRecord::Base
+  belongs_to :conference
+  has_many :booth_requests
+  has_many :users, through: :booth_requests
+
+  validates :title,
+            uniqueness: { case_sensitive: fasle},
+            presence: true
+
+  validates :description,
+            :reasoning,
+            :state,
+            :logo_link
+            :conference_id,
+            presence: true
+end

app/models/booth_request.rb

@@ -0,0 +1,10 @@
+class BoothRequest < ActiveRecord::Base
+  belongs_to :booth
+  belongs_to :user
+
+  validates :booth,
+            :user,
+            :role,
+            presence: true
+
+end

app/models/call_for_booth.rb

@@ -0,0 +1,22 @@
+class CallForBooth < ActiveRecord::Base
+  belongs_to :conference
+
+  validates :start_date, :end_date, :booth_limit, presence: true
+  validate :before_end_of_conference
+  validate :start_date_before_end_date
+
+  private
+
+  def before_end_of_conference
+    errors
+    .add(:start_date, "can't be after the conference end date (#{conference.end_date})") if conference && conference.end_date && start_date && (start_date > conference.end_date)
+
+    errors
+    .add(:end_date, "can't be after the conference end date (#{conference.end_date})") if conference && conference.end_date && end_date && (end_date > conference.end_date)
+  end
+
+  def start_date_before_end_date
+    errors
+    .add(:start_date, "can't be after the end date") if start_date && end_date && start_date > end_date
+  end
+end

app/models/conference.rb

@@ -16,6 +16,7 @@ class Conference < ActiveRecord::Base
   has_one :splashpage, dependent: :destroy
   has_one :contact, dependent: :destroy
   has_one :registration_period, dependent: :destroy
+  has_one :call_for_booths, dependent: :destroy
   has_one :email_settings, dependent: :destroy
   has_one :program, dependent: :destroy
   has_one :venue, dependent: :destroy
@@ -24,6 +25,7 @@ class Conference < ActiveRecord::Base
   has_many :supporters, through: :ticket_purchases, source: :user
   has_many :tickets, dependent: :destroy
   has_many :resources, dependent: :destroy
+  has_many :booths,  dependent: :destroy
 
   has_many :lodgings, dependent: :destroy
   has_many :registrations, dependent: :destroy

app/models/user.rb

@@ -50,11 +50,13 @@ class User < ActiveRecord::Base
   has_many :votes, dependent: :destroy
   has_many :voted_events, through: :votes, source: :events
   has_many :subscriptions, dependent: :destroy
+  has_many :booth_requests
+  has_many :booths, through: :users_booths
   accepts_nested_attributes_for :roles
 
   scope :admin, -> { where(is_admin: true) }
   scope :active, -> { where(is_disabled: false) }
-
+  
   validates :email, presence: true
 
   validates :username,