Assigns a random color to conference, track and difficulty level

app/assets/javascripts/osem.js

@@ -95,8 +95,32 @@ $(function() {
             $(this).find('span:nth-child(2)').toggleClass("glyphicon-chevron-down glyphicon-chevron-right");
         }
     });
+
+    $('a:contains("Add track")').click(function () {
+        setTimeout(function () {
+                $("div.nested-fields:last div:nth-of-type(2) input").val(get_color());
+            },
+            5)
+    });
+
+    $('a:contains("Add difficulty_level")').click(function () {
+        setTimeout(function () {
+                $("div.nested-fields:last div:nth-of-type(3) input").val(get_color());
+            },
+            5)
+    });
 });
 
+function get_color() {
+    var colors = ['#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'
+    ];
+    return colors[Math.floor(Math.random() * colors.length)];
+}
+
 function word_count(text, divId, maxcount) {
     var r = 0;
     var input = text.value.replace(/\s/g,' ');

app/models/conference.rb

@@ -64,6 +64,7 @@ class Conference < ActiveRecord::Base
   before_create :generate_guid
   before_create :create_venue
   before_create :create_email_settings
+  before_create :add_color
 
   def self.media_types
     media_types = {:youtube => 'YouTube', :slideshare => 'SlideShare',  :flickr => 'Flickr', :vimeo => 'Vimeo', :speakerdeck => 'Speakerdeck', :instagram => 'Instagram'}
@@ -189,4 +190,18 @@ class Conference < ActiveRecord::Base
     self.guid = guid
   end
 
+  ##
+  # Adds a random color to the conference
+  #
+  def add_color
+    if !color
+      self.color = %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
+    end
+  end
 end

db/migrate/20140530082708_remove_color_defaults.rb

@@ -0,0 +1,7 @@
+class RemoveColorDefaults < ActiveRecord::Migration
+  def change
+    change_column_default(:tracks, :color, nil)
+    change_column_default(:conferences, :color, nil)
+    change_column_default(:difficulty_levels, :color, nil)
+  end
+end

db/schema.rb

@@ -11,7 +11,7 @@
 #
 # It's strongly recommended that you check this file into your version control system.
 
-ActiveRecord::Schema.define(version: 20140529133339) do
+ActiveRecord::Schema.define(version: 20140530082708) do
 
   create_table "answers", force: true do |t|
     t.string   "title"
@@ -78,7 +78,7 @@ ActiveRecord::Schema.define(version: 20140529133339) do
     t.boolean  "use_volunteers"
     t.string   "media_id"
     t.string   "media_type"
-    t.string   "color",                    default: "#000000"
+    t.string   "color"
     t.text     "description"
     t.text     "registration_description"
     t.text     "ticket_description"
@@ -100,7 +100,7 @@ ActiveRecord::Schema.define(version: 20140529133339) do
     t.integer  "conference_id"
     t.string   "title"
     t.text     "description"
-    t.string   "color",         default: "#ffffff"
+    t.string   "color"
     t.datetime "created_at"
     t.datetime "updated_at"
   end
@@ -313,7 +313,7 @@ ActiveRecord::Schema.define(version: 20140529133339) do
     t.integer  "conference_id"
     t.string   "name",                              null: false
     t.text     "description"
-    t.string   "color",         default: "#ffffff"
+    t.string   "color"
     t.datetime "created_at"
     t.datetime "updated_at"
   end