import { readFileSync } from 'fs';
import { fileURLToPath } from 'url';
import { dirname, join } from 'path';
const __filename = fileURLToPath(import.meta.url);
const __dirname = dirname(__filename);
export interface WcagCriterion {
id: string;
name: string;
level: 'A' | 'AA' | 'AAA';
principle: string;
guideline: string;
description: string;
techniques: string[];
failures: string[];
tests: string[];
}
export interface WcagData {
metadata: {
version: string;
lastUpdated: string;
source: string;
};
principles: Array<{
id: string;
name: string;
description: string;
}>;
criteria: WcagCriterion[];
}
let wcagData: WcagData | null = null;
export function loadCriteria(): WcagData {
if (wcagData) {
return wcagData;
}
const dataPath = join(__dirname, '../data/wcag-criteria.json');
const rawData = readFileSync(dataPath, 'utf-8');
wcagData = JSON.parse(rawData) as WcagData;
return wcagData;
}
export function findByNumber(criterionId: string): WcagCriterion | null {
const data = loadCriteria();
const normalized = criterionId.replace(/^wcag/i, '').trim();
return data.criteria.find(c => c.id === normalized) || null;
}
export function findByKeyword(keyword: string): WcagCriterion[] {
const data = loadCriteria();
const lowerKeyword = keyword.toLowerCase();
return data.criteria.filter(c =>
c.name.toLowerCase().includes(lowerKeyword) ||
c.description.toLowerCase().includes(lowerKeyword) ||
c.guideline.toLowerCase().includes(lowerKeyword) ||
c.tests.some(t => t.toLowerCase().includes(lowerKeyword))
);
}
export function findByLevel(level: 'A' | 'AA' | 'AAA'): WcagCriterion[] {
const data = loadCriteria();
return data.criteria.filter(c => c.level === level);
}
export function findByPrinciple(principle: string): WcagCriterion[] {
const data = loadCriteria();
const lowerPrinciple = principle.toLowerCase();
return data.criteria.filter(c =>
c.principle.toLowerCase().includes(lowerPrinciple)
);
}
export function getAllCriteria(): WcagCriterion[] {
const data = loadCriteria();
return data.criteria;
}
export function getMetadata() {
const data = loadCriteria();
return data.metadata;
}
