Plugins: extract slug generation to common util

Author: kouloumos

_plugins/auto-anchor.rb

@@ -16,10 +16,7 @@ def auto_anchor(content)
         ## No match, pass item through unchanged
         string
       else
-        ## Remove double-quotes from titles before attempting to slugify
-        title.gsub!('"', '')
-        ## Use Liquid/Jekyll slugify filter to choose our id
-        slug = "\#{{ \"#{title}\" | slugify: 'latin' }}"
+        slug = generate_slug(title)
         id_prefix = "- {:#{slug} .anchor-list} <a href=\"#{slug}\" class=\"anchor-list-link\">●</a>"
         string.sub!(/-/, id_prefix)
       end

_plugins/common_utils.rb

@@ -0,0 +1,10 @@
+def generate_slug(title)
+  ## Remove double-quotes from titles before attempting to slugify
+  title.gsub!('"', '')
+  ## Use Liquid/Jekyll slugify filter to choose our id
+  liquid_string = "\#{{ \"#{title}\" | slugify: 'latin' }}"
+  slug = Liquid::Template.parse(liquid_string)
+  # An empty context is used here because we only need to parse the liquid
+  # string and don't require any additional variables or data.
+  slug.render(Liquid::Context.new) 
+end

_plugins/recap_references_generator.rb

@@ -30,17 +30,6 @@ def generate(site)
     end
   end
 
-  def generate_slug(title)
-    ## Remove double-quotes from titles before attempting to slugify
-    title.gsub!('"', '')
-    ## Use Liquid/Jekyll slugify filter to choose our id
-    liquid_string = "\#{{ \"#{title}\" | slugify: 'latin' }}"
-    slug = Liquid::Template.parse(liquid_string)
-    # An empty context is used here because we only need to parse the liquid
-    # string and don't require any additional variables or data.
-    slug.render(Liquid::Context.new) 
-  end
-
   def find_title(string, in_list=true, slugify=true)
     # this conditional prefix is for the special case of the review club section
     # which is not a list item (no dash (-) at the start of the line)