Detect and output parent theme

lib/common/models/wp_theme/childtheme.rb

@@ -0,0 +1,33 @@
+# encoding: UTF-8
+
+class WpTheme < WpItem
+  module Childtheme
+
+    def is_child_theme?
+      return true unless @theme_template.nil?
+      false
+    end
+
+    def get_parent_theme_style_url
+      if is_child_theme?
+        return style_url.sub("/#{name}/style.css", "/#@theme_template/style.css")
+      end
+      nil
+    end
+
+    def get_parent_theme
+      if is_child_theme?
+        base_url = @uri.clone
+        base_url.path = base_url.path.sub(/(?<url>.*\/)#{Regexp.escape(@wp_content_dir)}\/.+/, '\k<url>')
+        return WpTheme.new(base_url,
+                           {
+                               name: @theme_template,
+                               style_url: get_parent_theme_style_url,
+                               wp_content_dir: @wp_content_dir
+                           })
+      end
+      nil
+    end
+
+  end
+end