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Move Avatar component to jslib (#496)
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138
angular/src/components/avatar.component.ts
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138
angular/src/components/avatar.component.ts
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import {
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Component,
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Input,
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OnChanges,
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OnInit,
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} from '@angular/core';
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import { DomSanitizer } from '@angular/platform-browser';
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import { CryptoFunctionService } from 'jslib-common/abstractions/cryptoFunction.service';
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import { StateService } from 'jslib-common/abstractions/state.service';
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import { Utils } from 'jslib-common/misc/utils';
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@Component({
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selector: 'app-avatar',
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template: '<img [src]="sanitizer.bypassSecurityTrustResourceUrl(src)" title="{{data}}" ' +
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'[ngClass]="{\'rounded-circle\': circle}">',
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})
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export class AvatarComponent implements OnChanges, OnInit {
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@Input() data: string;
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@Input() email: string;
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@Input() size = 45;
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@Input() charCount = 2;
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@Input() textColor = '#ffffff';
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@Input() fontSize = 20;
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@Input() fontWeight = 300;
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@Input() dynamic = false;
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@Input() circle = false;
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src: string;
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constructor(public sanitizer: DomSanitizer, private cryptoFunctionService: CryptoFunctionService,
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private stateService: StateService) { }
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ngOnInit() {
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if (!this.dynamic) {
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this.generate();
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}
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}
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ngOnChanges() {
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if (this.dynamic) {
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this.generate();
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}
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}
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private async generate() {
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const enableGravatars = await this.stateService.get<boolean>('enableGravatars');
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if (enableGravatars && this.email != null) {
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const hashBytes = await this.cryptoFunctionService.hash(this.email.toLowerCase().trim(), 'md5');
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const hash = Utils.fromBufferToHex(hashBytes).toLowerCase();
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this.src = 'https://www.gravatar.com/avatar/' + hash + '?s=' + this.size + '&r=pg&d=retro';
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} else {
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let chars: string = null;
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const upperData = this.data.toUpperCase();
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if (this.charCount > 1) {
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chars = this.getFirstLetters(upperData, this.charCount);
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}
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if (chars == null) {
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chars = this.unicodeSafeSubstring(upperData, this.charCount);
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}
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// If the chars contain an emoji, only show it.
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if (chars.match(Utils.regexpEmojiPresentation)) {
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chars = chars.match(Utils.regexpEmojiPresentation)[0];
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}
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const charObj = this.getCharText(chars);
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const color = this.stringToColor(upperData);
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const svg = this.getSvg(this.size, color);
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svg.appendChild(charObj);
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const html = window.document.createElement('div').appendChild(svg).outerHTML;
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const svgHtml = window.btoa(unescape(encodeURIComponent(html)));
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this.src = 'data:image/svg+xml;base64,' + svgHtml;
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}
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}
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private stringToColor(str: string): string {
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let hash = 0;
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for (let i = 0; i < str.length; i++) {
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// tslint:disable-next-line
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hash = str.charCodeAt(i) + ((hash << 5) - hash);
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}
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let color = '#';
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for (let i = 0; i < 3; i++) {
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// tslint:disable-next-line
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const value = (hash >> (i * 8)) & 0xFF;
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color += ('00' + value.toString(16)).substr(-2);
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}
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return color;
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}
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private getFirstLetters(data: string, count: number): string {
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const parts = data.split(' ');
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if (parts.length > 1) {
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let text = '';
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for (let i = 0; i < count; i++) {
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text += this.unicodeSafeSubstring(parts[i], 1);
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}
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return text;
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}
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return null;
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}
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private getSvg(size: number, color: string): HTMLElement {
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const svgTag = window.document.createElement('svg');
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svgTag.setAttribute('xmlns', 'http://www.w3.org/2000/svg');
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svgTag.setAttribute('pointer-events', 'none');
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svgTag.setAttribute('width', size.toString());
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svgTag.setAttribute('height', size.toString());
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svgTag.style.backgroundColor = color;
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svgTag.style.width = size + 'px';
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svgTag.style.height = size + 'px';
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return svgTag;
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}
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private getCharText(character: string): HTMLElement {
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const textTag = window.document.createElement('text');
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textTag.setAttribute('text-anchor', 'middle');
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textTag.setAttribute('y', '50%');
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textTag.setAttribute('x', '50%');
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textTag.setAttribute('dy', '0.35em');
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textTag.setAttribute('pointer-events', 'auto');
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textTag.setAttribute('fill', this.textColor);
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textTag.setAttribute('font-family', '"Open Sans","Helvetica Neue",Helvetica,Arial,' +
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'sans-serif,"Apple Color Emoji","Segoe UI Emoji","Segoe UI Symbol"');
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textTag.textContent = character;
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textTag.style.fontWeight = this.fontWeight.toString();
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textTag.style.fontSize = this.fontSize + 'px';
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return textTag;
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}
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private unicodeSafeSubstring(str: string, count: number) {
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const characters = str.match(/./ug);
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return characters != null ? characters.slice(0, count).join('') : '';
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}
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}
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