module GoogleContactsApi
  class Contact < GoogleContactsApi::Result
    # :categories, (:content again), :links, (:title again), :email
    # :extended_properties, :deleted, :im, :name,
    # :organizations, :phone_numbers, :structured_postal_addresses, :where
    
    # Returns the array of links, as link is an array for Hashie.
    def links
      self["link"].map { |l| l.href }
    end
    
    # Returns link to get this contact
    def self_link
      _link = self["link"].find { |l| l.rel == "self" }
      _link ? _link.href : nil
    end
    
    # Returns alternative, possibly off-Google home page link
    def alternate_link
      _link = self["link"].find { |l| l.rel == "alternate" }
      _link ? _link.href : nil
    end
    
    # Returns link for photo
    # (still need authentication to get the photo data, though)
    def photo_link
      _link = self["link"].find { |l| l.rel == "http://schemas.google.com/contacts/2008/rel#photo" }
      _link ? _link.href : nil
    end
    
    # Returns binary data for the photo. You can probably
    # use it in a data-uri. This is in PNG format.
    def photo
      return nil unless @api && photo_link
      response = @api.oauth.get(photo_link)
      
      case response.code
      # maybe return a placeholder instead of nil
      when 400; return nil
      when 401; return nil
      when 403; return nil
      when 404; return nil
      when 400...500; return nil
      when 500...600; return nil
      else; return response.body
      end
    end
    
    # Returns link to add/replace the photo
    def edit_photo_link
      _link = self["link"].find { |l| l.rel == "http://schemas.google.com/contacts/2008/rel#edit_photo" }
      _link ? _link.href : nil
    end
    
    # Returns link to edit the contact
    def edit_link
      _link = self["link"].find { |l| l.rel == "edit" }
      _link ? _link.href : nil
    end
    
    # Returns all email addresses for the contact
    def emails
      self["gd$email"] ? self["gd$email"].map { |e| e.address } : []
    end
    
    # Returns primary email for the contact
    def primary_email
      if self["gd$email"]
        _email = self["gd$email"].find { |e| e.primary == "true" }
        _email ? _email.address : nil
      else
        nil # no emails at all
      end
    end
  end
end