Aleksander Grygier
35 lines
988 B
TypeScript
35 lines
988 B
TypeScript
/**
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* Favicon utility functions for extracting favicons from URLs.
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*/
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import { getProxiedUrlString } from './cors-proxy';
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import {
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GOOGLE_FAVICON_BASE_URL,
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DEFAULT_FAVICON_SIZE,
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DOMAIN_SEPARATOR,
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ROOT_DOMAIN_MIN_PARTS
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} from '$lib/constants';
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/**
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* Gets a favicon URL for a given URL using Google's favicon service.
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* Returns null if the URL is invalid.
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*
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* @param urlString - The URL to get the favicon for
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* @returns The favicon URL or null if invalid
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*/
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export function getFaviconUrl(urlString: string): string | null {
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try {
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const url = new URL(urlString);
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const hostnameParts = url.hostname.split(DOMAIN_SEPARATOR);
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const rootDomain =
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hostnameParts.length >= ROOT_DOMAIN_MIN_PARTS
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? hostnameParts.slice(-ROOT_DOMAIN_MIN_PARTS).join(DOMAIN_SEPARATOR)
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: url.hostname;
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const googleFaviconUrl = `${GOOGLE_FAVICON_BASE_URL}?domain=${rootDomain}&sz=${DEFAULT_FAVICON_SIZE}`;
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return getProxiedUrlString(googleFaviconUrl);
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} catch {
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return null;
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}
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}
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