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Fedor Indutny
2025-10-16 17:33:01 -07:00
parent 3387cf6a77
commit 44076ece79
2411 changed files with 0 additions and 0 deletions
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21
ts/util/getColorForCallLink.std.ts Normal file
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// Copyright 2024 Signal Messenger, LLC
// SPDX-License-Identifier: AGPL-3.0-only
import { AVATAR_COLOR_COUNT, AvatarColors } from '../types/Colors.std.js';
import type { AvatarColorType } from '../types/Colors.std.js';
// See https://github.com/signalapp/ringrtc/blob/49b4b8a16f997c7fa9a429e96aa83f80b2065c63/src/rust/src/lite/call_links/base16.rs#L8
const BASE_16_CONSONANT_ALPHABET = 'bcdfghkmnpqrstxz';
// See https://github.com/signalapp/ringrtc/blob/49b4b8a16f997c7fa9a429e96aa83f80b2065c63/src/rust/src/lite/call_links/base16.rs#L127-L139
export function getColorForCallLink(rootKey: string): AvatarColorType {
const rootKeyStart = rootKey.slice(0, 2);
const upper = (BASE_16_CONSONANT_ALPHABET.indexOf(rootKeyStart[0]) || 0) * 16;
const lower = BASE_16_CONSONANT_ALPHABET.indexOf(rootKeyStart[1]) || 0;
const firstByte = upper + lower;
const index = firstByte % AVATAR_COLOR_COUNT;
return AvatarColors[index];
}