Truncate long richtext descriptions

[rails.git] / lib / rich_text.rb

diff --git a/lib/rich_text.rb b/lib/rich_text.rb
index f554e5ab59d665a6b48332dab22b8e12d2ae115e..03800725ad98cc8af64c561288c4e0ff6269f39a 100644 (file)
--- a/lib/rich_text.rb
+++ b/lib/rich_text.rb
@@ -3,6 +3,8 @@ module RichText
     "Business Description:", "Additional Keywords:"
   ].freeze
 
+  MAX_DESCRIPTION_LENGTH = 500
+
   def self.new(format, text)
     case format
     when "html" then HTML.new(text || "")
@@ -109,6 +111,11 @@ module RichText
       @image_element.attr["alt"] if @image_element
     end
 
+    def description
+      @paragraph_element = first_paragraph_element(document.root) unless defined? @paragraph_element
+      truncated_text_content(@paragraph_element) if @paragraph_element
+    end
+
     private
 
     def document
@@ -124,9 +131,40 @@ module RichText
       end
     end
 
+    def first_paragraph_element(element)
+      return element if paragraph?(element)
+
+      element.children.find do |child|
+        nested_paragraph = first_paragraph_element(child)
+        break nested_paragraph if nested_paragraph
+      end
+    end
+
+    def truncated_text_content(element)
+      text = ""
+
+      append_text = lambda do |child|
+        if child.type == :text
+          text << child.value
+        else
+          child.children.each do |c|
+            append_text.call(c)
+            break if text.length > MAX_DESCRIPTION_LENGTH
+          end
+        end
+      end
+      append_text.call(element)
+
+      text.truncate(MAX_DESCRIPTION_LENGTH)
+    end
+
     def image?(element)
       element.type == :img || (element.type == :html_element && element.value == "img")
     end
+
+    def paragraph?(element)
+      element.type == :p || (element.type == :html_element && element.value == "p")
+    end
   end
 
   class Text < Base