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Move Avatar component to jslib (#496)

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Oscar Hinton 2021-10-13 09:55:19 +02:00 committed by GitHub
parent e3ab324d59
commit 56233e4002
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import {
Component,
Input,
OnChanges,
OnInit,
} from '@angular/core';
import { DomSanitizer } from '@angular/platform-browser';
import { CryptoFunctionService } from 'jslib-common/abstractions/cryptoFunction.service';
import { StateService } from 'jslib-common/abstractions/state.service';
import { Utils } from 'jslib-common/misc/utils';
@Component({
selector: 'app-avatar',
template: '<img [src]="sanitizer.bypassSecurityTrustResourceUrl(src)" title="{{data}}" ' +
'[ngClass]="{\'rounded-circle\': circle}">',
})
export class AvatarComponent implements OnChanges, OnInit {
@Input() data: string;
@Input() email: string;
@Input() size = 45;
@Input() charCount = 2;
@Input() textColor = '#ffffff';
@Input() fontSize = 20;
@Input() fontWeight = 300;
@Input() dynamic = false;
@Input() circle = false;
src: string;
constructor(public sanitizer: DomSanitizer, private cryptoFunctionService: CryptoFunctionService,
private stateService: StateService) { }
ngOnInit() {
if (!this.dynamic) {
this.generate();
}
}
ngOnChanges() {
if (this.dynamic) {
this.generate();
}
}
private async generate() {
const enableGravatars = await this.stateService.get<boolean>('enableGravatars');
if (enableGravatars && this.email != null) {
const hashBytes = await this.cryptoFunctionService.hash(this.email.toLowerCase().trim(), 'md5');
const hash = Utils.fromBufferToHex(hashBytes).toLowerCase();
this.src = 'https://www.gravatar.com/avatar/' + hash + '?s=' + this.size + '&r=pg&d=retro';
} else {
let chars: string = null;
const upperData = this.data.toUpperCase();
if (this.charCount > 1) {
chars = this.getFirstLetters(upperData, this.charCount);
}
if (chars == null) {
chars = this.unicodeSafeSubstring(upperData, this.charCount);
}
// If the chars contain an emoji, only show it.
if (chars.match(Utils.regexpEmojiPresentation)) {
chars = chars.match(Utils.regexpEmojiPresentation)[0];
}
const charObj = this.getCharText(chars);
const color = this.stringToColor(upperData);
const svg = this.getSvg(this.size, color);
svg.appendChild(charObj);
const html = window.document.createElement('div').appendChild(svg).outerHTML;
const svgHtml = window.btoa(unescape(encodeURIComponent(html)));
this.src = 'data:image/svg+xml;base64,' + svgHtml;
}
}
private stringToColor(str: string): string {
let hash = 0;
for (let i = 0; i < str.length; i++) {
// tslint:disable-next-line
hash = str.charCodeAt(i) + ((hash << 5) - hash);
}
let color = '#';
for (let i = 0; i < 3; i++) {
// tslint:disable-next-line
const value = (hash >> (i * 8)) & 0xFF;
color += ('00' + value.toString(16)).substr(-2);
}
return color;
}
private getFirstLetters(data: string, count: number): string {
const parts = data.split(' ');
if (parts.length > 1) {
let text = '';
for (let i = 0; i < count; i++) {
text += this.unicodeSafeSubstring(parts[i], 1);
}
return text;
}
return null;
}
private getSvg(size: number, color: string): HTMLElement {
const svgTag = window.document.createElement('svg');
svgTag.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
svgTag.setAttribute('pointer-events', 'none');
svgTag.setAttribute('width', size.toString());
svgTag.setAttribute('height', size.toString());
svgTag.style.backgroundColor = color;
svgTag.style.width = size + 'px';
svgTag.style.height = size + 'px';
return svgTag;
}
private getCharText(character: string): HTMLElement {
const textTag = window.document.createElement('text');
textTag.setAttribute('text-anchor', 'middle');
textTag.setAttribute('y', '50%');
textTag.setAttribute('x', '50%');
textTag.setAttribute('dy', '0.35em');
textTag.setAttribute('pointer-events', 'auto');
textTag.setAttribute('fill', this.textColor);
textTag.setAttribute('font-family', '"Open Sans","Helvetica Neue",Helvetica,Arial,' +
'sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"');
textTag.textContent = character;
textTag.style.fontWeight = this.fontWeight.toString();
textTag.style.fontSize = this.fontSize + 'px';
return textTag;
}
private unicodeSafeSubstring(str: string, count: number) {
const characters = str.match(/./ug);
return characters != null ? characters.slice(0, count).join('') : '';
}
}