Module: ContentItem::ClassMethods

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# File 'lib/content_items/content_item.rb', line 44

def acts_as_content_item
  class_eval <<-EOV
    include Mongoid::Document
    include Mongoid::Timestamps
    include Mongoid::Taggable
    include CoverPicture

    # ContentItems should have an unique title
    field :title
    index :title
    validates_presence_of :title
    validates_uniqueness_of :title

    # ContentItems marked as 'draft' should not be in the default-scope
    field :is_draft, :type => Boolean, :default => true
    scope :drafts, lambda { unscoped.where(is_draft: true ) }

    if self.respond_to?(:is_template)
      scope :published, lambda { unscoped.where(is_draft: false, is_template: false ) }
    else
      scope :published, lambda { unscoped.where(is_draft: false ) }
    end

    # Will return a truncated version of the title if it exceeds the maximum
    # length of titles used in the menu (or wherever you can't display long titles)
    def short_title
      title.truncate(CONSTANTS['title_max_length'].to_i, :omission => '...')
    end

    # Display title with markers for templates and drafts
    def title_and_flags
      title_html = self.t(I18n.locale,:title)||self.title
      if self.respond_to?(:is_template)
        title_html += "&nbsp;<span class='templage_flag'>#{I18n.translate(:is_a_template_flag)}</span>".html_safe if self.is_template
      end
      title_html += "&nbsp;<span class='draft_flag'>#{I18n.translate(:is_a_draft_flag)}</span>".html_safe if self.is_draft
      title_html.html_safe
    end


    # A standard <code>link_to 'Name', @page</code> will put in a link
    # to "/pages/OPBJECT_ID" but we want to see the title in the link
    # (Google prefers that). See: PagesController::permalinked
    def link_to_title
      short_title_for_url.txt_to_url
    end

    def render_intro(interpret=true)
      content_for_intro(interpret)
    end

    def render_for_html(txt,context_view=nil)
      @context_view ||= context_view if context_view
      self.interpreter ||= :markdown
      case self.interpreter.to_sym
      when :markdown
        markdown(txt).html_safe
      when :textile
        RedCloth.new(txt).to_html
      when :simple_text
        txt.each_line.map do |line|
          '<p>' + line.strip + '</p>' unless line.strip.blank?
        end.compact.join("\n")
      else
        txt
      end.gsub( /ATTACHMENT:[([0-9])+]/ ) { |attachment|
        render_attachment(attachment.gsub( /ATTACHMENT:/,'' ).to_i)
      }.gsub( /COMPONENT:[([0-9])+]/ ) { |component|
        component_i = component.gsub( /\D/,'' ).to_i
        render_page_component(component_i)
      }.gsub(/YOUTUBE(_PLAYLIST)?:([a-z|A-Z|0-9|\\-|_])+/) { |tag|
        args = tag.split(':')
        case args[0]
        when 'YOUTUBE'
          embed_youtube_video(args[1])
        when 'YOUTUBE_PLAYLIST'
          embed_youtube_playlist(args[1])
        else
          "ARGUMENT ERROR: " + args.inspect
        end
      }.gsub(/PLUSONE/, '<g:plusone size="small"></g:plusone>')
      .gsub( /\\[LOCATION:([\\d\\., \\-]+)\\]/) {|location|
        render_location_link(location.gsub('LOCATION','').gsub('[','').gsub(']','').gsub(':',''))
      }
      .gsub(/\\[PLACE:([a-z|A-Z|0-9|\\-| |,]+)\\]/) {|place|
        render_place_link(place.gsub('PLACE','').gsub('[','').gsub(']','').gsub(':',''))
      }.html_safe
    end

    private
    def content_for_intro
      raise "ABSTRACT_METHOD_CALLED - Overwrite content_for_intro"
    end

    def render_attachment(idx)
      idx ||= 1
      idx -= 1
      if @context_view
        attachment = self.attachments.all[idx]
        if attachment
          if attachment.file_content_type =~ /image/
            @context_view.image_tag( @context_view.w3c_url(attachment.file.url(:medium)) )
          elsif attachment.file_content_type =~ /video/
            @context_view.video_tag(@context_view.w3c_url(attachment.file.url), :controls => true, :autoplay => false)
          else
            @context_view.link_to(attachment.file_file_name,@context_view.w3c_url(attachment.file.url))
          end
        else
          "ATTACHMENT "+idx.to_s+" NOT FOUND"
        end
     end
    end

    def render_component(idx)
      "RENDER COMPONENT NOT IMPLEMENTED FOR #{self.class.to_s}"
    end

    def embed_youtube_playlist(youtube_tag)
      "<iframe width='560' height='345' src='http://www.youtube.com/p/" +
        youtube_tag +
      "?version=3&amp;hl=en_US' frameborder='0' allowfullscreen=''></iframe>"
    end

    def embed_youtube_video(youtube_tag)
      "<iframe width='420' height='345' src='http://www.youtube.com/embed/"+
        youtube_tag +
        "' frameborder='0' allowfullscreen=''></iframe>"
    end
    
    def render_location_link(location)
      "<a href='#' class='open-location'>"+location+"</a>"
    end

    def render_place_link(place)
      "<a href='#' class='open-place'>"+place+"</a>"
    end
  EOV
end