Modified controllers and models to enable downloading annotations.

modified:   app/controllers/application_controller.rb
modified:   app/controllers/audio_events_controller.rb
modified:   app/models/audio_event.rb
modified:   app/models/audio_event_tag.rb
modified:   app/models/audio_recording.rb
modified:   app/models/tag.rb
new file:   app/views/audio_events/download.csv.erb

modified:   config/routes.rb
-- added route for downloading audio tags

modified:   db/development_seeds.rb
-- tags are now properly connected to audio events

app/controllers/application_controller.rb

@@ -3,7 +3,26 @@ class ApplicationController < ActionController::Base
 
   # userstamp
   include Userstamp
-
+
+  # from http://stackoverflow.com/a/94626
+  def render_csv(filename = nil)
+    filename ||= params[:action]
+    filename += '.csv'
+
+    if request.env['HTTP_USER_AGENT'] =~ /msie/i
+      headers['Pragma'] = 'public'
+      headers["Content-type"] = "text/plain"
+      headers['Cache-Control'] = 'no-cache, must-revalidate, post-check=0, pre-check=0'
+      headers['Content-Disposition'] = "attachment; filename=\"#{filename}\""
+      headers['Expires'] = "0"
+    else
+      headers["Content-Type"] ||= 'text/csv'
+      headers["Content-Disposition"] = "attachment; filename=\"#{filename}\""
+    end
+
+    render :layout => false
+  end
+
   private 
 
   #def set_stamper

app/controllers/audio_events_controller.rb

@@ -98,4 +98,15 @@ def destroy
       format.json { head :no_content }
     end
   end
+
+  def download
+
+    @annotations = AudioEvent.includes(:tags).all
+
+    respond_to do |format|
+      format.xml { render xml: @annotations  }
+      format.json { render json: @annotations.to_json(:includes => :tags) }
+      format.csv  { render_csv("annotations-#{Time.now.strftime("%Y%m%d")}") }
+    end
+  end
 end

app/models/audio_event.rb

@@ -1,10 +1,10 @@
 class AudioEvent < ActiveRecord::Base
   # relations
   belongs_to :audio_recording
-  has_many :audio_event_tags
+  has_many :audio_event_tags, :inverse_of => :audio_event
   has_many :tags, :through => :audio_event_tags
 
-  accepts_nested_attributes_for :tags
+  accepts_nested_attributes_for :tags, :audio_event_tags
 
   # attr
   attr_accessible :audio_recording_id, :end_time_seconds, :high_frequency_hertz, :is_reference,

app/models/audio_event_tag.rb

@@ -4,6 +4,9 @@ class AudioEventTag < ActiveRecord::Base
   belongs_to :audio_event
   belongs_to :tag
 
+  # attr
+  attr_accessible :audio_event, :tag
+
   # userstamp
   stampable
   belongs_to :user, :class_name => 'User', :foreign_key => :creator_id

app/models/audio_recording.rb

@@ -13,7 +13,7 @@ class AudioRecording < ActiveRecord::Base
   attr_accessible :bit_rate_bps, :channels, :data_length_bytes,
                   :duration_seconds, :file_hash, :media_type, :notes,
                   :recorded_date, :sample_rate_hertz, :status, :uploader_id,
-                  :site_id
+                  :site_id, :uuid
 
   accepts_nested_attributes_for :site
 

app/models/tag.rb

@@ -2,9 +2,11 @@ class Tag < ActiveRecord::Base
   extend Enumerize
 
   # relations
-  has_many :audio_event_tags
+  has_many :audio_event_tags, :inverse_of => :tag
   has_many :audio_events, :through => :audio_event_tags
 
+  accepts_nested_attributes_for :audio_events, :audio_event_tags
+
   # attr
   attr_accessible :is_taxanomic, :text, :type_of_tag
 

app/views/audio_events/download.csv.erb

@@ -0,0 +1,6 @@
+"Tag", "Start Date", "Start Time", "End Date", "End Time", "Max Frequency (hz)", "Min Frequency (hz)", "Projects", "Sites", "Sensor Name", "Score", "Tagged by", "Player link"
+<%= CSV.generate do |csv|
+  @annotations.each do |annotation|
+    csv << [ annotation[:audio_recording_id] ]
+  end
+end %>