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@@ -26,6 +26,12 @@ class Site < ActiveRecord::Base
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     @@template_handlers.keys
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   end
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+  @@spam_detection_engines = []
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+  def self.register_spam_detection_engine(name, klass)
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+    @@spam_detection_engines<< [name, klass.name]
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+  end
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+  cattr_reader :spam_detection_engines
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+
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   has_many  :sections, :order => "position", :dependent => :destroy do
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     def home
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       find_by_path ''

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@@ -44,17 +44,21 @@
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 <div id="spam" class="setgroup">
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   <h3>Spam prevention</h3>
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-  <p>At the moment Mephisto uses <%= link_to 'Akismet', 'http://akismet.com' %> to automatically handle spam.  If you leave out the Akismet settings, you can moderate new comments from the Overview.</p>
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   <dl class="setform">
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-    <dt><label>Akismet API Key</label></dt> 
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-    <dd><%= f.text_field :akismet_key %></dd>
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-    <dt><label>Blog url</label></dt> 
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-    <dd><%= f.text_field :akismet_url %></dd>
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     <dt><label for="site_comment_age">Comments</label></dt>
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     <dd><%= f.select :comment_age, comment_expiration_options %></dd>
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     <dt>
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       <label><%= f.check_box 'approve_comments' %> Approve and publish all comments automatically.</label>
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     </dt>
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+    <dt><label for="site_spam_detection_engine">Spam Detection Engine</label></dt>
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+    <dd><%= f.select :spam_detection_engine, Site.spam_detection_engines %></dd>
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+  </dl>
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+  <p>At the moment Mephisto uses <%= link_to 'Akismet', 'http://akismet.com' %> to automatically handle spam.  If you leave out the Akismet settings, you can moderate new comments from the Overview.</p>
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+  <dl class="setform">
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+    <dt><label>Akismet API Key</label></dt> 
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+    <dd><%#= f.text_field :akismet_key %></dd>
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+    <dt><label>Blog url</label></dt> 
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+    <dd><%#= f.text_field :akismet_url %></dd>
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   </dl>
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 </div>
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@@ -1,6 +1,8 @@
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 module Mephisto
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   module SpamDetectionEngines
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     class AkismetEngine < Mephisto::SpamDetectionEngine::Base
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+      Site.register_spam_detection_engine "Akismet", self
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+
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       def ham?(permalink_url, comment)
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         check_valid!
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         !akismet.comment_check(comment_spam_options(permalink_url, comment))

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@@ -1,6 +1,8 @@
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 module Mephisto
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   module SpamDetectionEngines
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     class DefensioEngine < Mephisto::SpamDetectionEngine::Base
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+      Site.register_spam_detection_engine "Defensio", self
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+
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       def valid?
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         [:defensio_url, :defensio_key].all? {|key| !options[key].blank?}
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       end

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@@ -1,6 +1,8 @@
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 module Mephisto
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   module SpamDetectionEngines
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     class NullEngine < Mephisto::SpamDetectionEngine::Base
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+      Site.register_spam_detection_engine "None", self
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+
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       def ham?(permalink_url, comment)
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         true
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       end