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path: root/lib/gitlab/hook_data/issuable_builder.rb
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module Gitlab
  module HookData
    class IssuableBuilder
      CHANGES_KEYS = %i[previous current].freeze

      attr_accessor :issuable

      def initialize(issuable)
        @issuable = issuable
      end

      def build(user: nil, changes: {})
        hook_data = {
          object_kind: issuable.class.name.underscore,
          user: user.hook_attrs,
          project: issuable.project.hook_attrs,
          object_attributes: issuable.hook_attrs,
          labels: issuable.labels.map(&:hook_attrs),
          changes: final_changes(changes.slice(*safe_keys)),
          # DEPRECATED
          repository: issuable.project.hook_attrs.slice(:name, :url, :description, :homepage)
        }

        if issuable.is_a?(Issue)
          hook_data[:assignees] = issuable.assignees.map(&:hook_attrs) if issuable.assignees.any?
        else
          hook_data[:assignee] = issuable.assignee.hook_attrs if issuable.assignee
        end

        hook_data
      end

      def safe_keys
        issuable_builder::SAFE_HOOK_ATTRIBUTES + issuable_builder::SAFE_HOOK_RELATIONS
      end

      private

      def issuable_builder
        case issuable
        when Issue
          Gitlab::HookData::IssueBuilder
        when MergeRequest
          Gitlab::HookData::MergeRequestBuilder
        end
      end

      def final_changes(changes_hash)
        changes_hash.reduce({}) do |hash, (key, changes_array)|
          hash[key] = Hash[CHANGES_KEYS.zip(changes_array)]
          hash
        end
      end
    end
  end
end