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import glob from 'fast-glob';

import kleur from 'kleur';

/** Makes sure that all translations’ slugs match the English slugs. */

class SlugChecker {

async run() {

const errors = await this.#findMismatchedSlugs();

this.#outputResult(errors);

}

/** Load all Markdown pages and check non-English pages have counterparts in `pages/en/`. */

async #findMismatchedSlugs() {

const enSlugs = new Set();

/** @type {Record<string, string[]>} */

const errorMap = {};

(await glob('./src/content/docs/**/*.{md,mdx}'))

.filter((file) => !file.endsWith('404.mdx'))

.map((file) => {

const [, lang, slug] = file.replace('./src/content/docs/', '').match(/^([^/]+)\/(.+)$/);

if (lang === 'en') enSlugs.add(slug);

return [lang, slug];

})

.forEach(([lang, slug]) => {

if (enSlugs.has(slug)) return;

if (!errorMap[lang]) errorMap[lang] = [];

errorMap[lang].push(slug);

});

return Object.entries(errorMap);

}

/**

* Print the result of the slug check to the console.

* @param {[lang: string, slugs: string[]][]} errors

*/

#outputResult(errors) {

if (errors.length === 0) {

console.log(kleur.green().bold(`\n*** Found no translations with mismatched slugs\n`));

return;

}

const prefix = kleur.gray(` [${kleur.red().bold(' ✖ ')}] `);

let errorCount = 0;

for (const [lang, slugs] of errors) {

errorCount += slugs.length;

const summary = [`\n/${lang}/`, ...slugs.map((slug) => prefix + slug)];

console.error(summary.join('\n'));

}

console.error(kleur.red().bold(`\n*** Found ${errorCount} translations with mismatched slugs`));

console.error(' Rename the files listed above to match English slugs\n');

process.exit(1);

}

}

const checker = new SlugChecker();

checker.run();