move filters to their own class

lib/jekyll-seo-tag.rb

@@ -1,9 +1,11 @@
 require "jekyll"
 require "jekyll-seo-tag/version"
-require "jekyll-seo-tag/drop"
 
 module Jekyll
   class SeoTag < Liquid::Tag
+    autoload :Drop,    "jekyll-seo-tag/drop"
+    autoload :Filters, "jekyll-seo-tag/filters"
+
     attr_accessor :context
 
     # Matches all whitespace that follows either

lib/jekyll-seo-tag/drop.rb

@@ -2,12 +2,6 @@ module Jekyll
   class SeoTag
     class Drop < Jekyll::Drops::Drop
       TITLE_SEPARATOR = " | ".freeze
-      INCLUDES = [Jekyll::Filters, Liquid::StandardFilters].freeze
-
-      INCLUDES.each do |klass|
-        include klass
-        klass.instance_methods.each { |method| private method }
-      end
 
       def initialize(text, context)
         @obj = {}
@@ -129,9 +123,9 @@ module Jekyll
         @logo ||= begin
           return unless site["logo"]
           if absolute_url? site["logo"]
-            uri_escape site["logo"]
+            filters.uri_escape site["logo"]
           else
-            uri_escape absolute_url site["logo"]
+            filters.uri_escape filters.absolute_url site["logo"]
           end
         end
       end
@@ -155,10 +149,10 @@ module Jekyll
         image["path"] ||= image["facebook"] || image["twitter"]
 
         unless absolute_url? image["path"]
-          image["path"] = absolute_url image["path"]
+          image["path"] = filters.absolute_url image["path"]
         end
 
-        image["path"] = uri_escape image["path"]
+        image["path"] = filters.uri_escape image["path"]
 
         @image = image.to_liquid
       end
@@ -169,6 +163,10 @@ module Jekyll
 
       private
 
+      def filters
+        @filters ||= Jekyll::SeoTag::Filters.new(@context)
+      end
+
       def page
         @page ||= @context.registers[:page].to_liquid
       end
@@ -194,7 +192,7 @@ module Jekyll
       def format_string(string)
         methods = %i[markdownify strip_html normalize_whitespace escape_once]
         methods.each do |method|
-          string = send(method, string)
+          string = filters.public_send(method, string)
         end
 
         string unless string.empty?

lib/jekyll-seo-tag/filters.rb

@@ -0,0 +1,12 @@
+module Jekyll
+  class SeoTag
+    class Filters
+      include Jekyll::Filters
+      include Liquid::StandardFilters
+
+      def initialize(context)
+        @context = context
+      end
+    end
+  end
+end