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/**
* @license
* Copyright (C) 2017 The Android Open Source Project
*
* 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.
*/
import {ChangeInfo, PatchSetNum} from '../../../types/common';
import {ParsedChangeInfo} from '../gr-rest-api-interface/gr-reviewer-updates-parser';
type RevNumberToParentCountMap = {[revNumber: number]: number};
export class RevisionInfo {
/**
* @constructor
* @param change A change object resulting from a change detail
* call that includes revision information.
*/
constructor(private change: ChangeInfo | ParsedChangeInfo) {}
/**
* Get the largest number of parents of the commit in any revision. For
* example, with normal changes this will always return 1. For merge changes
* wherein the revisions are merge commits this will return 2 or potentially
* more.
*/
getMaxParents() {
if (!this.change || !this.change.revisions) {
return 0;
}
return Object.values(this.change.revisions).reduce(
(acc, rev) => Math.max(!rev.commit ? 0 : rev.commit.parents.length, acc),
0
);
}
/**
* Get an object that maps revision numbers to the number of parents of the
* commit of that revision.
*/
getParentCountMap() {
const result: RevNumberToParentCountMap = {};
if (!this.change || !this.change.revisions) {
return {};
}
Object.values(this.change.revisions).forEach(rev => {
if (rev.commit) result[rev._number as number] = rev.commit.parents.length;
});
return result;
}
getParentCount(patchNum: PatchSetNum) {
return this.getParentCountMap()[patchNum as number];
}
/**
* Get the commit ID of the (0-offset) indexed parent in the given revision
* number.
*/
getParentId(patchNum: PatchSetNum, parentIndex: number) {
if (!this.change.revisions) return;
const rev = Object.values(this.change.revisions).find(
rev => rev._number === patchNum
);
if (!rev || !rev.commit) return;
return rev.commit.parents[parentIndex].commit;
}
}