# frozen_string_literal: true

# This concern is used by registerd services such as TeamCityService and
# DroneCiService and add methods to perform validations on the received
# data.

module ServicePushDataValidations
  extend ActiveSupport::Concern

  def merge_request_valid?(data)
    data.dig(:object_attributes, :state) == 'opened' && merge_request_unchecked?(data)
  end

  def push_valid?(data)
    data[:total_commits_count] > 0 &&
      !branch_removed?(data) &&
      # prefer merge request trigger over push to avoid double builds
      !opened_merge_requests?(data)
  end

  def tag_push_valid?(data)
    data[:total_commits_count] > 0 && !branch_removed?(data)
  end

  private

  def branch_removed?(data)
    Gitlab::Git.blank_ref?(data[:after])
  end

  def opened_merge_requests?(data)
    project.merge_requests
      .opened
      .from_project(project)
      .from_source_branches(Gitlab::Git.ref_name(data[:ref]))
      .exists?
  end

  def merge_request_unchecked?(data)
    MergeRequest.state_machines[:merge_status]
      .check_state?(data.dig(:object_attributes, :merge_status))
  end
end