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import type { z } from 'astro/zod';
import type { RSSOptions } from './index.js';
/** Normalize URL to its canonical form */
export function createCanonicalURL(
url: string,
trailingSlash?: RSSOptions['trailingSlash'],
base?: string
): string {
let pathname = url.replace(/\/index.html$/, ''); // index.html is not canonical
if (!getUrlExtension(url)) {
// add trailing slash if there’s no extension or `trailingSlash` is true
pathname = pathname.replace(/\/*$/, '/');
}
pathname = pathname.replace(/\/+/g, '/'); // remove duplicate slashes (URL() won’t)
const canonicalUrl = new URL(pathname, base).href;
if (trailingSlash === false) {
// remove the trailing slash
return canonicalUrl.replace(/\/*$/, '');
}
return canonicalUrl;
}
/** Check if a URL is already valid */
export function isValidURL(url: string): boolean {
try {
new URL(url);
return true;
} catch {}
return false;
}
function getUrlExtension(url: string) {
const lastDot = url.lastIndexOf('.');
const lastSlash = url.lastIndexOf('/');
return lastDot > lastSlash ? url.slice(lastDot + 1) : '';
}
const flattenErrorPath = (errorPath: (string | number)[]) => errorPath.join('.');
export const errorMap: z.ZodErrorMap = (error, ctx) => {
if (error.code === 'invalid_type') {
const badKeyPath = JSON.stringify(flattenErrorPath(error.path));
if (error.received === 'undefined') {
return { message: `${badKeyPath} is required.` };
} else {
return { message: `${badKeyPath} should be ${error.expected}, not ${error.received}.` };
}
}
return { message: ctx.defaultError };
};
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