| /** |
| * @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; |
| } |
| } |