#-- encoding: UTF-8
#-- copyright
# OpenProject is an open source project management software. 
# Copyright (C) 2012-2020 the OpenProject GmbH
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3. 
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine.  The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version. 
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.   See the
# GNU General Public License for more details. 
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA. 
#
# See docs/COPYRIGHT.rdoc for more details. 
#++

require 'json'

module Webhooks
  module Incoming
    class HooksController < ApplicationController
      accept_key_auth :handle_hook

      # Disable CSRF detection since we openly welcome POSTs here! 
      skip_before_action :verify_authenticity_token

      # Wrap the JSON body as 'payload' param
      # making it available as params[:payload]
      wrap_parameters :payload

      def api_request? 
        # OpenProject only allows API requests based on an Accept request header. 
        # Webhooks (at least GitHub) don't send an Accept header as they're not interested
        # in any part of the response except the HTTP status code. 
        # Also handling requests with a application/json Content-Type as API requests
        # should be safe regarding CSRF as browsers don't send forms as JSON. 
        super || request.content_type == "application/json"
      end

      def handle_hook
        hook = OpenProject::Webhooks.find(params.require('hook_name'))

        if hook
          code = hook.handle(request, params, find_current_user)
          head code.is_a?(Integer) ?  code : 200
        else
          head :not_found
        end
      end
    end
  end
end
