option to strip links from excerpts

app/models/post.rb

@@ -221,14 +221,14 @@ class Post < ActiveRecord::Base
                 user_id: user_id).first.try(:user)
   end
 
-  def self.excerpt(cooked, maxlength = nil)
+  def self.excerpt(cooked, maxlength = nil, options = {})
     maxlength ||= SiteSetting.post_excerpt_maxlength
-    PrettyText.excerpt(cooked, maxlength)
+    PrettyText.excerpt(cooked, maxlength, options)
   end
 
   # Strip out most of the markup
-  def excerpt(maxlength = nil)
-    Post.excerpt(cooked, maxlength)
+  def excerpt(maxlength = nil, options = {})
+    Post.excerpt(cooked, maxlength, options)
   end
 
   # What we use to cook posts

app/serializers/topic_list_item_serializer.rb

@@ -60,7 +60,7 @@ class TopicListItemSerializer < ListableTopicSerializer
   end
 
   def excerpt
-    object.posts.first.try(:excerpt,200) || nil
+    object.posts.first.try(:excerpt,220, strip_links: true) || nil
   end
 
 end

lib/pretty_text.rb

@@ -239,14 +239,16 @@ module PrettyText
 
     attr_reader :excerpt
 
-    def initialize(length)
+    def initialize(length,options)
       @length = length
       @excerpt = ""
       @current_length = 0
+      @strip_links = options[:strip_links] == true
     end
 
-    def self.get_excerpt(html, length)
-      me = self.new(length)
+    def self.get_excerpt(html, length, options)
+
+      me = self.new(length,options)
       parser = Nokogiri::HTML::SAX::Parser.new(me)
       begin
         copy = "<div>"
@@ -271,11 +273,13 @@ module PrettyText
             characters("[image]")
           end
         when "a"
+          unless @strip_links
             c = "<a "
             c << attributes.map{|k,v| "#{k}='#{v}'"}.join(' ')
             c << ">"
             characters(c, false, false, false)
             @in_a = true
+          end
         when "aside"
           @in_quote = true
       end
@@ -284,8 +288,10 @@ module PrettyText
     def end_element(name)
       case name
       when "a"
+        unless @strip_links
           characters("</a>",false, false, false)
           @in_a = false
+        end
       when "p", "br"
         characters(" ")
       when "aside"
@@ -307,8 +313,8 @@ module PrettyText
     end
   end
 
-  def self.excerpt(html, length)
-    ExcerptParser.get_excerpt(html, length)
+  def self.excerpt(html, max_length, options={})
+    ExcerptParser.get_excerpt(html, max_length, options)
   end
 
 end

spec/components/pretty_text_spec.rb

@@ -104,6 +104,11 @@ test
   end
 
   describe "Excerpt" do
+
+    it "should have an option to strip links" do
+      PrettyText.excerpt("<a href='http://cnn.com'>cnn</a>",100, strip_links: true).should == "cnn"
+    end
+
     it "should preserve links" do
       PrettyText.excerpt("<a href='http://cnn.com'>cnn</a>",100).should == "<a href='http://cnn.com'>cnn</a>"
     end