rosa-build/app/models/concerns/feed/issue.rb

module Feed::Issue
  extend ActiveSupport::Concern

  included do
    after_commit :new_issue_notifications, on: :create

    after_commit :send_assign_notifications,                on: :create, if: ->(i) { i.assignee }
    after_commit -> { send_assign_notifications(:update) }, on: :update

    after_commit :send_hooks,                on: :create
    after_commit -> { send_hooks(:update) }, on: :update, if: ->(i) { i.previous_changes['status'].present? }
  end

  private

  def new_issue_notifications
    collect_recipients.each do |recipient|
      next if user_id == recipient.id
      if recipient.notifier.can_notify && recipient.notifier.new_issue && assignee_id != recipient.id
        UserMailer.new_issue_notification(self, recipient).deliver
      end
      ActivityFeed.create(
        user: recipient,
        kind: 'new_issue_notification',
        data: {
          user_name:       user.name,
          user_email:      user.email,
          user_id:         user_id,
          issue_serial_id: serial_id,
          issue_title:     title,
          project_id:      project.id,
          project_name:    project.name,
          project_owner:   project.owner.uname
        }
      )
    end
    Comment.create_link_on_issues_from_item(self)
  end

  def send_assign_notifications(action = :create)
    if(action == :create && assignee_id) || previous_changes['assignee_id'].present?
      if assignee.notifier.issue_assign && assignee.notifier.can_notify
        UserMailer.issue_assign_notification(self, assignee).deliver
      end
      ActivityFeed.create(
        user: assignee,
        kind: 'issue_assign_notification',
        data: {
          user_name:       assignee.name,
          user_email:      assignee.email,
          issue_serial_id: serial_id,
          issue_title:     title,
          project_id:      project.id,
          project_name:    project.name,
          project_owner:   project.owner.uname
        }
      )
    end
    # dont remove outdated issues link
    Comment.create_link_on_issues_from_item(self) if previous_changes['title'].present? || previous_changes['body'].present?
  end

  def send_hooks(action = :create)
    project.hooks.each{ |h| h.receive_issues(self, action) }
  end
end