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