Skip images with missing src

[rails.git] / lib / rich_text.rb

diff --git a/lib/rich_text.rb b/lib/rich_text.rb
index 56d358bd8dcb2823afa64a7dcb56e62f5a40d589..edfa535f434c07d23fb88412ad9dd673c38645d5 100644 (file)
--- a/lib/rich_text.rb
+++ b/lib/rich_text.rb
@@ -49,6 +49,10 @@ module RichText
         (spammy_phrases * 40)
     end
 
+    def image
+      nil
+    end
+
     protected
 
     def simple_format(text)
@@ -80,12 +84,37 @@ module RichText
 
   class Markdown < Base
     def to_html
-      linkify(sanitize(Kramdown::Document.new(self).to_html), :all)
+      linkify(sanitize(document.to_html), :all)
     end
 
     def to_text
       to_s
     end
+
+    def image
+      return @image if defined? @image
+
+      @image = first_image_element(document.root)&.attr&.[]("src")
+    end
+
+    private
+
+    def document
+      @document ||= Kramdown::Document.new(self)
+    end
+
+    def first_image_element(element)
+      return element if image?(element) && element.attr["src"].present?
+
+      element.children.find do |child|
+        nested_image = first_image_element(child)
+        break nested_image if nested_image
+      end
+    end
+
+    def image?(element)
+      element.type == :img || (element.type == :html_element && element.value == "img")
+    end
   end
 
   class Text < Base