Traillazer Operation

message.rb

class Message < ActiveRecord::Base
  class Create < Trailblazer::Operation
    include CRUD
    model Message, :create

    builds do |params|
      System if params[:conversation].messages.empty?
    end

    contract do
      model Message

      property :user
      property :body
      property :conversation

      validates :user, presence: true
    end

    def process(params)
      conversation = params[:conversation]
      user = params[:user]

      validate(params.fetch(:message, {}).merge(conversation: conversation, user: user)) do |f|
        f.save
      end
    end

    class System < self
      contract do
        model Message

        property :body
        property :conversation

        validates :user, presence: true
      end

      def process(params)
        @conversation = params[:conversation]
        create_hash = params.fetch(:message, {}).merge(conversation: @conversation, body: body)
        validate(create_hash) do |f|
          f.save
        end
      end

      def body
        # [g] gross.
        """
          New conversation between #{@conversation.event.organization} and #{@conversation.user}.\n\n
          #{@conversation.tier.event} - #{@conversation.tier}
        """
      end
    end
  end

  class Update < Create
    action :update
  end
end