Added rough pass at content rendering for grid. Expect howto / docume…

…ntation in wiki soon. [concerto#121]

app/controllers/contents_controller.rb

@@ -125,4 +125,14 @@ def destroy
       format.xml  { head :ok }
     end
   end
+
+  # GET /contents/1/display
+  # Trigger the render function a piece of content and passes all the params
+  # along for processing.  Should send an inline result of the processing.
+  def display
+    @content = Content.find(params[:id])
+    @file = @content.render(params)
+    send_data @file.file_data, :filename => @file.file_name, :type => @file.file_type, :disposition => 'inline'
+  end
+
 end

app/helpers/contents_helper.rb

@@ -22,7 +22,7 @@ def render_content(content, options={})
 
     options[:type] ||= 'default'
 
-    render  :partial => "contents/#{content.type.underscore}/render_#{options[:type]}", 
+    render  :partial => "contents/#{content.class.to_s.underscore}/render_#{options[:type]}", 
             :locals => {:content => content, :options => options}
   end
 end

app/models/graphic.rb

@@ -13,4 +13,29 @@ def set_kind
     self.kind = Kind.where(:name => 'Graphics').first
   end
 
+  # Responsible for display transformations on an image.
+  # Resizes the image to fit a width and height specified (both required ATM).
+  # Returns a new (unsaved) Media instance.
+  def render(options={})
+    # In theory, there should be more code in here to look for a cached image and be smarter
+    # about the resizing, but this is a good first pass.
+    if options.key?(:width) && options.key?(:height)
+      require 'RMagick'
+      @media = self.medias.original.first
+
+      image = Magick::ImageList.new
+      image.from_blob(@media.file_contents)
+      image.resize!(options[:width].to_i, options[:height].to_i)
+
+      file = Media.new(
+        :attachable => self,
+        :file_data => image.to_blob,
+        :file_type => image.mime_type,
+        :file_name => @media.file_name
+      )
+
+      return file
+    end
+  end
+
 end

app/views/contents/_grid.html.erb

@@ -4,7 +4,7 @@
   		<a href=""> 
   			<div class="iconlist_padding"> 
       			<div class="ins"> 
-        				<div class="type-folder"><%= content.data %><%#= image_tag("ph/ph.png", :alt => "") %></div>
+        				<div class="type-folder"><%= render_content(content, :type =>'grid') %></div>
       			</div> 
       			<h2>
 					<%= content.name %>
@@ -16,4 +16,4 @@
   	</li>
 </ul>
 <% end %>
-<div style="clear:both;"></div>
+<div style="clear:both;"></div>

app/views/contents/graphic/_render_grid.html.erb

@@ -1 +1 @@
-<%= image_tag media_path(content.medias.original.first), :alt => content.name %>
+<%= image_tag display_content_path(content, :width => 150, :height => 117), :alt => content.name %>

app/views/contents/ticker/_render_grid.html.erb

@@ -0,0 +1 @@
+<%= content.data %>

config/routes.rb

@@ -40,11 +40,15 @@
   #  feeds.resources :submissions
   #end
 
-  resources :contents, :path => "content"  
+  resources :contents, :path => "content" do
+    get :display, :on => :member
+  end
 
-  resources :graphics, :controller => :contents, :path => "content"
-  resources :tickers, :controller => :contents, :path => "content"
+  resources :graphics, :controller => :contents, :path => "content" do
+    get :display, :on => :member
+  end
 
+  resources :tickers, :controller => :contents, :path => "content"
   # The priority is based upon order of creation:
   # first created -> highest priority.