New enumeration system

lib/common/models/wp_item/existable.rb

@@ -0,0 +1,55 @@
+# encoding: UTF-8
+
+# HACK
+module Typhoeus
+  class Response
+
+    # Compare the body hash to error_404_hash and homepage_hash
+    # returns true if they are different, false otherwise
+    #
+    # @return [ Boolean ]
+    def has_valid_hash?(error_404_hash, homepage_hash)
+      body_hash = Digest::MD5.hexdigest(self.body)
+
+      body_hash != error_404_hash && body_hash != homepage_hash
+    end
+  end
+end
+
+class WpItem
+  module Existable
+
+    def exists?(options = {}, response = nil)
+      unless response
+        response = Browser.instance.get(url)
+      end
+      exists_from_response?(response, options)
+    end
+
+    protected
+
+    # options:
+    #   :error_404_hash
+    #   :homepage_hash
+    #   :exclude_content REGEXP
+    #
+    # @return [ Boolean ]
+    def exists_from_response?(response, options = {})
+      # FIXME : The response is supposed to follow locations, so we should not have 301 or 302.
+      # However, due to an issue with Typhoeus or Webmock, the location is not followed in specs
+      if [200, 301, 302, 401, 403].include?(response.code)
+        if response.has_valid_hash?(options[:error_404_hash], options[:homepage_hash])
+          if options[:exclude_content]
+            unless response.body.match(options[:exclude_content])
+              return true
+            end
+          else
+            return true
+          end
+        end
+      end
+      false
+    end
+
+  end
+end