#!/usr/bin/env node
/**
* Fetches WCAG data from W3C.
*
* Usage:
* node scripts/fetch-wcag-data.js
*
* This script fetches wcag.json from W3C's published WCAG 2.2 JSON
*/
import { writeFile, mkdir } from 'fs/promises';
import { dirname, join } from 'path';
import { fileURLToPath } from 'url';
const __dirname = dirname(fileURLToPath(import.meta.url));
const DATA_DIR = join(__dirname, '..', 'data');
const WCAG_JSON_URL = 'https://www.w3.org/WAI/WCAG22/wcag.json';
async function fetchWcagJson() {
console.log('Fetching WCAG 2.2 JSON from W3C...');
const response = await fetch(WCAG_JSON_URL);
if (!response.ok) {
throw new Error(`Failed to fetch WCAG JSON: ${response.status} ${response.statusText}`);
}
const data = await response.text();
const outputPath = join(DATA_DIR, 'wcag.json');
await writeFile(outputPath, data, 'utf8');
console.log(`✓ Saved wcag.json (${(data.length / 1024).toFixed(1)} KB)`);
// Parse and report stats
const wcag = JSON.parse(data);
const scCount = wcag.principles.reduce((sum, p) =>
sum + p.guidelines.reduce((gSum, g) => gSum + g.successcriteria.length, 0), 0);
const termCount = wcag.terms?.length || 0;
console.log(` → ${wcag.principles.length} principles`);
console.log(` → ${wcag.principles.reduce((sum, p) => sum + p.guidelines.length, 0)} guidelines`);
console.log(` → ${scCount} success criteria`);
console.log(` → ${termCount} glossary terms`);
}
async function main() {
console.log('='.repeat(50));
console.log('WCAG MCP Data Build');
console.log('='.repeat(50));
console.log();
try {
await fetchWcagJson();
console.log('\n' + '='.repeat(50));
console.log('✓ Data build complete!');
console.log('='.repeat(50));
} catch (error) {
console.error('\n✗ Build failed:', error.message);
process.exit(1);
}
}
main();
