forked from mystiq/hydrogen-web
61 lines
1.8 KiB
TypeScript
61 lines
1.8 KiB
TypeScript
/*
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Copyright 2020 Bruno Windels <bruno@windels.cloud>
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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import { Platform } from "../platform/web/Platform";
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import { MediaRepository } from "../matrix/net/MediaRepository";
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export function avatarInitials(name: string): string {
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let firstChar = name.charAt(0);
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if (firstChar === "!" || firstChar === "@" || firstChar === "#") {
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firstChar = name.charAt(1);
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}
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return firstChar.toUpperCase();
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}
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/**
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* calculates a numeric hash for a given string
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*
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* @param {string} str string to hash
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*
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* @return {number}
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*/
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function hashCode(str: string): number {
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let hash = 0;
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let i: number;
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let chr: number;
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if (str.length === 0) {
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return hash;
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}
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for (i = 0; i < str.length; i++) {
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chr = str.charCodeAt(i);
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hash = ((hash << 5) - hash) + chr;
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hash |= 0;
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}
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return Math.abs(hash);
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}
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export function getIdentifierColorNumber(id: string): number {
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return (hashCode(id) % 8) + 1;
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}
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export function getAvatarHttpUrl(avatarUrl: string, cssSize: number, platform: Platform, mediaRepository: MediaRepository): string | null {
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if (avatarUrl) {
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const imageSize = cssSize * platform.devicePixelRatio;
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return mediaRepository.mxcUrlThumbnail(avatarUrl, imageSize, imageSize, "crop");
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}
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return null;
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}
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