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path: root/lib/gitlab/ci/status/composite.rb
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# frozen_string_literal: true

module Gitlab
  module Ci
    module Status
      class Composite
        include Gitlab::Utils::StrongMemoize

        # This class accepts an array of arrays/hashes/or objects
        def initialize(all_statuses, with_allow_failure: true)
          unless all_statuses.respond_to?(:pluck)
            raise ArgumentError, "all_statuses needs to respond to `.pluck`"
          end

          @status_set = Set.new
          @status_key = 0
          @allow_failure_key = 1 if with_allow_failure

          consume_all_statuses(all_statuses)
        end

        # The status calculation is order dependent,
        # 1. In some cases we assume that that status is exact
        #    if the we only have given statues,
        # 2. In other cases we assume that status is of that type
        #    based on what statuses are no longer valid based on the
        #    data set that we have
        # rubocop: disable Metrics/CyclomaticComplexity
        # rubocop: disable Metrics/PerceivedComplexity
        def status
          return if none?

          strong_memoize(:status) do
            if only_of?(:skipped, :ignored)
              'skipped'
            elsif only_of?(:success, :skipped, :success_with_warnings, :ignored)
              'success'
            elsif only_of?(:created, :success_with_warnings, :ignored)
              'created'
            elsif only_of?(:preparing, :success_with_warnings, :ignored)
              'preparing'
            elsif only_of?(:canceled, :success, :skipped, :success_with_warnings, :ignored)
              'canceled'
            elsif only_of?(:pending, :created, :skipped, :success_with_warnings, :ignored)
              'pending'
            elsif any_of?(:running, :pending)
              'running'
            elsif any_of?(:waiting_for_resource)
              'waiting_for_resource'
            elsif any_of?(:manual)
              'manual'
            elsif any_of?(:scheduled)
              'scheduled'
            elsif any_of?(:preparing)
              'preparing'
            elsif any_of?(:created)
              'running'
            else
              'failed'
            end
          end
        end
        # rubocop: enable Metrics/CyclomaticComplexity
        # rubocop: enable Metrics/PerceivedComplexity

        def warnings?
          @status_set.include?(:success_with_warnings)
        end

        private

        def none?
          @status_set.empty?
        end

        def any_of?(*names)
          names.any? { |name| @status_set.include?(name) }
        end

        def only_of?(*names)
          matching = names.count { |name| @status_set.include?(name) }
          matching > 0 &&
            matching == @status_set.size
        end

        def consume_all_statuses(all_statuses)
          columns = []
          columns[@status_key] = :status
          columns[@allow_failure_key] = :allow_failure if @allow_failure_key

          all_statuses
            .pluck(*columns) # rubocop: disable CodeReuse/ActiveRecord
            .each(&method(:consume_status))
        end

        def consume_status(description)
          # convert `"status"` into `["status"]`
          description = Array(description)

          status =
            if success_with_warnings?(description)
              :success_with_warnings
            elsif ignored_status?(description)
              :ignored
            else
              description[@status_key].to_sym
            end

          @status_set.add(status)
        end

        def success_with_warnings?(status)
          @allow_failure_key &&
            status[@allow_failure_key] &&
            ::Ci::HasStatus::PASSED_WITH_WARNINGS_STATUSES.include?(status[@status_key])
        end

        def ignored_status?(status)
          @allow_failure_key &&
            status[@allow_failure_key] &&
            ::Ci::HasStatus::EXCLUDE_IGNORED_STATUSES.include?(status[@status_key])
        end
      end
    end
  end
end