Initial release of Discourse

app/models/incoming_link.rb

@@ -0,0 +1,47 @@
+class IncomingLink < ActiveRecord::Base
+  belongs_to :topic
+
+  validates :domain, :length => { :in => 1..100 }
+  validates :referer, :length => { :in => 3..1000 }
+  validates_presence_of :url
+
+  # Extract the domain
+  before_validation do
+
+    # Referer (remote URL)
+    if referer.present?
+      parsed = URI.parse(referer)
+      self.domain = parsed.host
+    end
+
+    # Our URL
+    if url.present?
+
+      parsed = URI.parse(url)
+
+      begin
+        params = Rails.application.routes.recognize_path(parsed.path)
+        self.topic_id = params[:topic_id] if params[:topic_id].present?
+        self.post_number = params[:post_number] if params[:post_number].present?
+      rescue ActionController::RoutingError
+        # If we can't route to the url, that's OK. Don't save those two fields.
+      end
+    end
+
+  end
+
+  # Update appropriate incoming link counts
+  after_create do
+    if topic_id.present?
+      exec_sql("UPDATE topics
+                SET incoming_link_count = incoming_link_count + 1 
+                WHERE id = ?", topic_id)  
+      if post_number.present?
+        exec_sql("UPDATE posts 
+                  SET incoming_link_count = incoming_link_count + 1 
+                  WHERE topic_id = ? and post_number = ?", topic_id, post_number)  
+      end
+    end    
+  end
+
+end