Class: SubscriptionsController

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# File 'app/controllers/subscriptions_controller.rb', line 181

def destroy
  @subscription = Subscription.find(params[:id])
  auth!
  @subscription.destroy

  respond_to do |format|
    format.html { redirect_to(manage_screen_field_subscriptions_url(@screen, @field)) }
    format.xml  { head :ok }
  end
end

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# File 'app/controllers/subscriptions_controller.rb', line 63

def edit
  @subscription = Subscription.find(params[:id])
  auth!
end

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# File 'app/controllers/subscriptions_controller.rb', line 8

def get_field
  @field = Field.find(params[:field_id])
end

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# File 'app/controllers/subscriptions_controller.rb', line 4

def get_screen
  @screen = Screen.find(params[:screen_id])
end

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# File 'app/controllers/subscriptions_controller.rb', line 14

def index
  @subscriptions = @screen.subscriptions.all
  auth!

  respond_to do |format|
    format.html # index.html.erb
    format.xml  { render :xml => @subscriptions }
  end
end

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# File 'app/controllers/subscriptions_controller.rb', line 25

def manage
  @subscription = Subscription.new 
  #stub out the screen ID so that CanCan can find an owner to auth
  @subscription.screen_id = @screen.id
  auth! 
  
  @this_field = Field.find(params[:field_id])
  @fields = @screen.template.positions.collect{|p| p.field}
  
  respond_to do |format|
    format.html # manage.html.erb
  end
end

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# File 'app/controllers/subscriptions_controller.rb', line 53

def new
  @feed = Feed.find(params[:feed_id])

  respond_to do |format|
    format.html # show.html.erb
    format.js  { render :layout => false }
  end
end

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# File 'app/controllers/subscriptions_controller.rb', line 110

def save_all
  #Create parallel arrays to store feeds and their weights for each subscription
  @feed_ids = Array.new
  @weights = Array.new
  @errnos = Array.new
  
  #Populate instance var with all subscription id's submitted
  if params.has_key?("subscription_id")
    @subscription_ids = params[:subscription_id].values
  end
  
  #Correspondingly populate the feed_ids array with the value of subscription 
  if params.has_key?("subscription_feed")
    @feed_ids = params[:subscription_feed].values
  end
  
  #Have the weights of those subsciptions in yet annother corresponding array
  if params.has_key?("subscription_weight")
    @weights = params[:subscription_weight].values
  end
  
  #Do some fun auth stuff before we actually do anything dangerous
  auth!   
  
  #Get a hold of all the subscriptions ID's that aren't in the form and destroy them (as the user deleted them in the form)
  @all_screen_subs = @screen.subscriptions.where(:field_id => @field.id).map(&:id)
  #Use the subtraction operator to get the difference between the arrays
  unless @subscription_ids.nil?
    @subs_to_delete = @all_screen_subs - @subscription_ids.map! { |i| i.to_i }

    unless @subs_to_delete.empty?
      #Search and destroy removed subscriptions
      @subs_to_delete.each do |d|
        Subscription.find(d).destroy
      end
    end    
  end
  
  #raise "feed_ids: #{@feed_ids}"
  if @feed_ids.empty?
    #If the feed_ids array is empty, the user has removed all the subscriptions - NUKE IT FROM ORBIT
    @screen.subscriptions.where(:field_id => @field.id).destroy_all
  else
    #Iterate through all feed ID's the user has submitted (using an iterator i)
    @feed_ids.each_with_index do |feed_id, i|
      #Check for an existing subscription corresponding the the ID the user submitted
      @this_subscription = Subscription.where(:field_id => @field.id, :feed_id => feed_id).first
      if @this_subscription.nil?
        #Create a shiny new object if we don't come up with it
        @this_subscription = Subscription.new
      end
      
      #Update attributes of all subscriptions present in form and populate array with any errors encountered
      @errnos[i] = !@this_subscription.update_attributes(:screen => @screen, :field => @field, :feed_id => feed_id, :weight => @weights[i])
    end
  end

  respond_to do |format|
    @errnos.each_with_index do |errno, i|
      if errno
        format.html { render :action => "new", :notice => "Failed to update subscriptions for this screen position" }
        format.xml  { render :xml => @subscriptions[i].errors, :status => :unprocessable_entity }
      end
    end
    format.html { redirect_to(manage_screen_field_subscriptions_path(@screen, @field), :notice => t('subscriptions.records_updated')) }
    format.xml  { render :xml => @subscriptions, :status => :created, :location => @subscriptions }
  end
end

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# File 'app/controllers/subscriptions_controller.rb', line 41

def show
  @subscription = Subscription.find(params[:id])
  auth!

  respond_to do |format|
    format.html # show.html.erb
    format.xml  { render :xml => @subscription }
  end
end