move wiki functionality to plugin

app/models/page.rb

@@ -1,56 +0,0 @@
-class Page < ActiveRecord::Base
-  include ActsAsTree
-
-  belongs_to :user, :foreign_key => 'updated_by'
-
-  acts_as_versioned version_column: :lock_version, limit: 20
-  self.non_versioned_columns += %w(permalink created_at title)
-
-  acts_as_tree :order => "title"
-
-  attr_accessor :old_title # Save title to create redirect page when editing title
-
-  validates_presence_of :title, :body
-  validates_uniqueness_of :permalink, :title
-
-  before_validation :set_permalink, :on => :create
-  before_validation :update_permalink, :on => :update
-  after_update :create_redirect
-
-  scope :non_redirected, :conditions => {:redirect => nil}
-  scope :no_parent, :conditions => {:parent_id => nil}
-
-  def self.permalink(title)
-    title.gsub(/[\/\.,;@\s]/, "_").gsub(/[\"\']/, "")
-  end
-
-  def homepage?
-    permalink == "Home"
-  end
-
-  def set_permalink
-    unless title.blank?
-      self.permalink = Page.count == 0 ? "Home" : Page.permalink(title)
-    end
-  end
-
-  protected
-
-  def update_permalink
-    if changed.include?("title")
-      set_permalink
-      self.old_title = changes["title"].first # Save title for creating redirect
-    end
-  end
-
-  def create_redirect
-    unless old_title.blank?
-      Page.create :redirect => id,
-        :title => old_title,
-        :body => I18n.t('model.page.redirect', :title => title),
-        :permalink => Page.permalink(old_title),
-        :updated_by => updated_by
-    end
-  end
-end
-