44 lines
1.2 KiB
TypeScript
44 lines
1.2 KiB
TypeScript
// Copyright 2021 Signal Messenger, LLC
|
|
// SPDX-License-Identifier: AGPL-3.0-only
|
|
|
|
import emojiRegex from 'emoji-regex/es2015/RGI_Emoji';
|
|
|
|
import { assert } from './assert';
|
|
import { take } from './iterables';
|
|
|
|
const REGEXP = emojiRegex();
|
|
const MAX_EMOJI_TO_MATCH = 5000;
|
|
|
|
export function replaceEmojiWithSpaces(value: string): string {
|
|
return value.replace(REGEXP, ' ');
|
|
}
|
|
|
|
export type SplitElement = Readonly<{
|
|
type: 'emoji' | 'text';
|
|
value: string;
|
|
}>;
|
|
|
|
export function splitByEmoji(value: string): ReadonlyArray<SplitElement> {
|
|
const emojis = take(value.matchAll(REGEXP), MAX_EMOJI_TO_MATCH);
|
|
|
|
const result: Array<SplitElement> = [];
|
|
let lastIndex = 0;
|
|
for (const match of emojis) {
|
|
const nonEmojiText = value.slice(lastIndex, match.index);
|
|
if (nonEmojiText) {
|
|
result.push({ type: 'text', value: nonEmojiText });
|
|
}
|
|
|
|
result.push({ type: 'emoji', value: match[0] });
|
|
|
|
assert(match.index !== undefined, '`matchAll` should provide indices');
|
|
lastIndex = match.index + match[0].length;
|
|
}
|
|
|
|
const finalNonEmojiText = value.slice(lastIndex);
|
|
if (finalNonEmojiText) {
|
|
result.push({ type: 'text', value: finalNonEmojiText });
|
|
}
|
|
|
|
return result;
|
|
}
|