lib/transit/package/post.rb in transit-0.0.1 vs lib/transit/package/post.rb in transit-0.0.2

@@ -1,43 +1,97 @@
-module Transit
-  module Package
+module Transit::Package
+  module Post
     
-    module Post
-      extend ActiveSupport::Concern
+    autoload :Validations,  'transit/package/post/validations'
+    
+    extend ActiveSupport::Concern
+    
+    included do      
+      class_attribute :delivery_template, instance_writer: false
+      self.delivery_template = :post
       
-      included do
-        
-        field :title,       :type => String
-        field :post_date,   :type => Date
-        field :slug,        :type => String
-        field :teaser,      :type => String
-        
-        validates :title, :presence   => true
-        validates :slug,  :presence   => { :allow_blank => false }, 
-                          :uniqueness => { :scope => :_type, :message => "A post already exists with this exact title." }
-        
-        scope :published, where(:published => true, :post_date.lte => Date.today)
-        modded_with :sluggable, :fields => :title, :as => :slug
-        alias :timestamp_method :post_date               
-      end
+      include Transit::Model::Base
       
-      # Grab the previous post for a previous > next link list
-      #
-      def previous_post
-        @previous_post ||= self.class.only(:title, :slug).where(:post_date.lt => self.post_date).descending(:post_date).first
-      end
+      field :title,           :type => String
+      field :post_date,       :type => Date
+      field :slug,            :type => String,  :default => nil
+      field :teaser,          :type => String
+      field :default_teaser,  :type => String,  :default => ''
+      field :published,       :type => Boolean, :default => false
 
-      # Grab the next post for a previous > next link list
-      #
-      def next_post
-        @next_post ||= self.class.only(:title, :slug).where(:post_date.gt => self.post_date).ascending(:post_date).first
-      end
+      field :display_image, :type => Boolean, :default => true
       
-      def timestamp
-        return "" if self.post_date.nil?
-        self.post_date.strftime("%B %d, %Y")
-      end
+      scope :published, where(:published => true, :post_date.lte => Date.today.to_time.midnight)
+      before_validation :make_slugged_title, :if => lambda{ |p| p.published? }
+      before_save :make_slugged_title, :if => lambda{ |p| p.published? }
+      before_save :force_post_date_to_midnight
+      after_save :set_default_teaser
       
+      include Validations
+      
+    end
+    
+    # Grab the post "previous" to this one, ordered by post date
+    # @example
+    #   @post.previous_post
+    # 
+    def previous_post
+      @previous_post ||= self.class.only(:title, :slug).where(:post_date.lt => self.post_date).descending(:post_date).first
+    end
+
+    # Grab the post "next" to this one, ordered by post date
+    # @example
+    #   @post.next_post
+    #
+    def next_post
+      @next_post ||= self.class.only(:title, :slug).where(:post_date.gt => self.post_date).ascending(:post_date).first
+    end
+    
+    # Returns a timestamp formatted to a normal "post date"
+    # 
+    def timestamp
+      return "" if self.post_date.nil?
+      self.post_date.to_time.midnight.strftime("%B %d, %Y")
+    end
+    
+    # The "teaser" is a shortened version of a post used to display on "index" pages.
+    # Post models include a "teaser" and a "default teaser" allowing teasers to be 
+    # automatically generated from the first paragraph of the html body. It is assumed that 
+    # all posts will include at least one Text context containing the body of the post
+    # 
+    def teaser
+      return self.attributes['teaser'] unless self.attributes['teaser'].to_s.blank?
+      default_teaser.to_s
+    end
+    
+    private
+    
+    # Generate a URL-friendly slug from the title of this post
+    # 
+    def make_slugged_title
+      return true unless self.published?
+      return true unless self.slug.to_s.blank?
+      self.slug = self.title.to_slug
+    end
+    
+    # Generate the default teaser copy from the post's first html paragraph
+    # 
+    def set_default_teaser
+      return true unless self.default_teaser.blank?
+      textfield = self.contexts.ascending(:position).detect{ |c| c._type.to_s == 'Text' }
+      return true unless textfield      
+      doc = ::Nokogiri::HTML::DocumentFragment.parse(textfield.body)
+      self.update_attribute(:default_teaser, doc.xpath('.//p').first.try(:text).to_s)
+      doc = nil
+      true
+    end
+    
+    # Since mongo uses Time objects, make sure date is set to midnight so that it 
+    # always shows up on that date.
+    # 
+    def force_post_date_to_midnight
+      return true if self.post_date.nil?
+      self.post_date = self.post_date.to_time.midnight
     end
     
   end
 end
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