import fs from 'fs';
import crypto from 'crypto';
import path from 'path';
const CACHE_FILE = '.mmi-cache.json';
// In-memory cache
let cache = {};
/**
* Load cache from disk
*/
export function loadCache() {
try {
if (fs.existsSync(CACHE_FILE)) {
cache = JSON.parse(fs.readFileSync(CACHE_FILE, 'utf8'));
}
} catch (err) {
cache = {};
}
}
/**
* Save cache to disk
*/
function saveCache() {
try {
fs.writeFileSync(CACHE_FILE, JSON.stringify(cache, null, 2));
} catch (err) {
console.error('[Cache] Save error:', err.message);
}
}
/**
* Calculate file hash (MD5)
*/
function getFileHash(filePath) {
const content = fs.readFileSync(filePath, 'utf8');
return crypto.createHash('md5').update(content).digest('hex');
}
/**
* Check if file has changed
* @returns {boolean} true if changed
*/
export function hasFileChanged(filePath) {
const currentHash = getFileHash(filePath);
const cachedHash = cache[filePath];
if (!cachedHash || cachedHash !== currentHash) {
cache[filePath] = currentHash;
saveCache();
return true;
}
return false;
}
/**
* Get only changed files from a list
*/
export function getChangedFiles(files) {
return files.filter(file => hasFileChanged(file));
}
/**
* Clear cache for a project
*/
export function clearCache(projectPath) {
Object.keys(cache).forEach(key => {
if (key.startsWith(projectPath)) {
delete cache[key];
}
});
saveCache();
}
// Load on import
loadCache();
