Move PermalinkGenerator out of lib directory

lib/open_food_network/permalink_generator.rb

@@ -1,48 +0,0 @@
-# frozen_string_literal: true
-
-# Finds a unique permalink for a new or updated record.
-# It considers soft-deleted records which are ignored by Spree.
-# Spree's work:
-# https://github.com/spree/spree/blob/09b55f7/core/lib/spree/core/permalinks.rb
-#
-# This may become obsolete with Spree 2.3.
-# https://github.com/spree/spree/commits/master/core/lib/spree/core/permalinks.rb
-module PermalinkGenerator
-  def self.included(base)
-    base.extend(ClassMethods)
-  end
-
-  module ClassMethods
-    def find_available_value(existing, requested)
-      return requested unless existing.include?(requested)
-
-      used_indices = existing.map do |p|
-        p.slice!(/^#{requested}/)
-        p.match(/^\d+$/).to_s.to_i
-      end
-      options = (1..used_indices.length + 1).to_a - used_indices
-      requested + options.first.to_s
-    end
-  end
-
-  def create_unique_permalink(requested)
-    existing = others.where("permalink LIKE ?", "#{requested}%").pluck(:permalink)
-    self.class.find_available_value(existing, requested)
-  end
-
-  def others
-    if id.nil?
-      scope_with_deleted
-    else
-      scope_with_deleted.where('id != ?', id)
-    end
-  end
-
-  def scope_with_deleted
-    if self.class.respond_to?(:with_deleted)
-      self.class.with_deleted
-    else
-      self.class.where(nil)
-    end
-  end
-end