| 1 | /** |
| 2 | * Copyright (c) Meta Platforms, Inc. and affiliates. |
| 3 | * |
| 4 | * This source code is licensed under the MIT license found in the |
| 5 | * LICENSE file in the root directory of this source tree. |
| 6 | */ |
| 7 | |
| 8 | import type {CommitInfo} from 'isl/src/types'; |
| 9 | |
| 10 | import {diffLines, splitLines} from 'shared/diff'; |
| 11 | |
| 12 | export function getRealignedBlameInfo( |
| 13 | baseBlame: Array<[line: string, info: CommitInfo | undefined]>, |
| 14 | newCode: string, |
| 15 | ): Array<[line: string, info: CommitInfo | undefined]> { |
| 16 | // TODO: we could refuse to realign for gigantic files, since this is done synchronously it could affect perf. |
| 17 | |
| 18 | const baseLines = baseBlame.map(l => l[0]); |
| 19 | const newLines = splitLines(newCode); |
| 20 | |
| 21 | const lineDiffs = diffLines(baseLines, newLines); |
| 22 | |
| 23 | const newRevisionInfo = [...baseBlame]; |
| 24 | let accumulatedOffset = 0; |
| 25 | |
| 26 | // apply each change to the list of blame |
| 27 | for (const [a1, a2, b1, b2] of lineDiffs) { |
| 28 | const newEntries = new Array<[string, CommitInfo | undefined]>(b2 - b1).fill(['', undefined]); |
| 29 | |
| 30 | newRevisionInfo.splice(a1 + accumulatedOffset, a2 - a1, ...newEntries); |
| 31 | |
| 32 | // We removed (a2-a1) entries, then added (b2-b1) entries, |
| 33 | // which means the *next* a1 index that previously pointed in baseBlame |
| 34 | // needs to be offset according to this change since we're modifying newRevisionInfo in-place. |
| 35 | accumulatedOffset += b2 - b1 - (a2 - a1); |
| 36 | } |
| 37 | |
| 38 | return newRevisionInfo; |
| 39 | } |
| 40 | |
| 41 | /** |
| 42 | * Shorten a commit's author string to show inline: |
| 43 | * John Smith john@company.com -> John Smith |
| 44 | * john@company.com -> john@company.com |
| 45 | */ |
| 46 | export function shortenAuthorName(author: string): string { |
| 47 | const matchLeadingName = /(.*) [<>()a-zA-Z0-9\-_.+]+@.*/.exec(author); |
| 48 | if (matchLeadingName?.[1]) { |
| 49 | return matchLeadingName?.[1]; |
| 50 | } |
| 51 | return author; |
| 52 | } |
| 53 | |