37 lines
1.0 KiB
TypeScript
37 lines
1.0 KiB
TypeScript
import { Pipe, PipeTransform, inject } from '@angular/core';
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import { LanguageService } from '../services/language.service';
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@Pipe({
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name: 'langRoute',
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pure: false
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})
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export class LangRoutePipe implements PipeTransform {
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private langService = inject(LanguageService);
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private lastLang = '';
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private lastInput: unknown = null;
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private lastResult: string | (string | number)[] = '';
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transform(value: string | (string | number)[]): string | (string | number)[] {
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const lang = this.langService.currentLanguage();
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// Short-circuit if nothing changed
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if (lang === this.lastLang && value === this.lastInput) {
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return this.lastResult;
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}
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this.lastLang = lang;
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this.lastInput = value;
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if (typeof value === 'string') {
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this.lastResult = value === '/' ? `/${lang}` : `/${lang}${value}`;
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} else if (Array.isArray(value) && value.length > 0) {
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const [first, ...rest] = value;
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this.lastResult = [`/${lang}${first}`, ...rest];
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} else {
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this.lastResult = value;
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}
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return this.lastResult;
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}
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}
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