vrfs-927: added new promotional table for home page data

db/manifest

@@ -81,3 +81,5 @@ notification_band_invite.sql
 band_photo_filepicker.sql
 bands_geocoding.sql
 store_s3_filenames.sql
+home_page_promos.sql
+

db/up/home_page_promos.sql

@@ -0,0 +1,28 @@
+-- 
+CREATE TABLE promotionals(
+    id VARCHAR(64) PRIMARY KEY DEFAULT uuid_generate_v4(),
+
+    /* allows for single table inheritance */
+    type VARCHAR(128) NOT NULL DEFAULT 'JamRuby::PromoBuzz',
+    /* state machine */
+    aasm_state VARCHAR(64) DEFAULT 'hidden',
+    /* order of promo within its types */
+    position integer NOT NULL DEFAULT 0,
+    /* optional expiration date */
+    expires_at TIMESTAMP DEFAULT NULL,
+    /* standard AR timestamps */
+    created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
+
+    /* references latest recording or session polymorphically */
+    latest_id VARCHAR(64) DEFAULT NULL, 
+    latest_type VARCHAR(128) DEFAULT NULL,
+
+    /* used for buzz promo type */
+    original_fpfile_photo VARCHAR(8000) DEFAULT NULL,
+    photo_url VARCHAR(2048) DEFAULT NULL,
+    text_short VARCHAR(512) DEFAULT NULL,
+    text_long VARCHAR(4096) DEFAULT NULL
+);
+
+CREATE INDEX promo_latest_idx ON promotionals(latest_id, latest_type);

ruby/lib/jam_ruby.rb

@@ -83,6 +83,7 @@ require "jam_ruby/models/mix"
 require "jam_ruby/models/claimed_recording"
 require "jam_ruby/models/crash_dump"
 require "jam_ruby/models/isp_score_batch"
+require "jam_ruby/models/promotional"
 
 include Jampb
 

ruby/lib/jam_ruby/models/promotional.rb

@@ -0,0 +1,45 @@
+class JamRuby::Promotional < ActiveRecord::Base
+  self.table_name = :promotionals
+  self.abstract_class = true
+
+  attr_accessible :expires_at, :position, :aasm_state
+
+  include AASM
+  HIDDEN_STATE = :hidden
+  ACTIVE_STATE = :active
+  EXPIRED_STATE = :expired
+
+  aasm do
+    state HIDDEN_STATE, :initial => true
+    state ACTIVE_STATE
+    state EXPIRED_STATE
+    
+    event :activate do
+      transitions :from => [HIDDEN_STATE, EXPIRED_STATE], :to => ACTIVE_STATE
+    end
+    
+    event :expire do
+      transitions :from => [HIDDEN_STATE, ACTIVE_STATE], :to => EXPIRED_STATE
+    end
+
+    event :hide do
+      transitions :from => [HIDDEN_STATE, ACTIVE_STATE], :to => HIDDEN_STATE
+    end
+
+  end
+
+  def state
+    aasm_state
+  end
+
+end
+
+class JamRuby::PromoBuzz < JamRuby::Promotional
+  attr_accessible :original_fpfile_photo, :photo_url, :text_short, :text_long
+
+end
+
+class JamRuby::PromoLatest < JamRuby::Promotional
+  belongs_to :latest, :polymorphic => true
+
+end