cv/internal/gerrit/whom.go

// Copyright 2021 The LUCI Authors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//      http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package gerrit

import (
	"fmt"
	"sort"

	gerritpb "go.chromium.org/luci/common/proto/gerrit"
)

// Whom identifies one or a group of Gerrit users involved in the code review
// workflow.
type Whom int32

const (
	// Owner is the owner of the CL (user who uploaded the first patchset).
	Owner Whom = 1
	// Reviewers are the reviewers of the CL.
	Reviewers Whom = 2
	// CQVoters are the users who have voted on CQ label to trigger a CV Run.
	CQVoters Whom = 3
)

func (w Whom) String() string {
	switch w {
	case Owner:
		return "owner"
	case Reviewers:
		return "reviewers"
	case CQVoters:
		return "CQ label voters"
	default:
		return fmt.Sprintf("whom[%d]", w)
	}
}

// Whoms is a collection of `Whom`s.
type Whoms []Whom

// ToAccountIDsSorted translates whom to actual Gerrit account ids in a CL.
func (whoms Whoms) ToAccountIDsSorted(ci *gerritpb.ChangeInfo) []int64 {
	accountSet := make(map[int64]struct{})
	for _, whom := range whoms {
		switch whom {
		case Owner:
			accountSet[ci.GetOwner().GetAccountId()] = struct{}{}
		case Reviewers:
			for _, reviewer := range ci.GetReviewers().GetReviewers() {
				accountSet[reviewer.GetAccountId()] = struct{}{}
			}
		case CQVoters:
			for _, vote := range ci.GetLabels()["Commit-Queue"].GetAll() {
				if vote.GetValue() > 0 {
					accountSet[vote.GetUser().GetAccountId()] = struct{}{}
				}
			}
		default:
			panic(fmt.Sprintf("unknown whom: %s", whom))
		}
	}
	ret := make([]int64, 0, len(accountSet))
	for acct := range accountSet {
		ret = append(ret, acct)
	}
	sort.Slice(ret, func(i, j int) bool { return ret[i] < ret[j] })
	return ret
}