/*

In-memory cache backend; same shape as `cache/idb.js`. Used when `integrity:false` or IDB unavailable.

Methods are sync but callers `await` uniformly: stays interchangeable with `IdbCache`.

*/

export class MemoryCache {

constructor() {

this.cas = new Map(); // hash -> bytes

this.lockfile = new Map(); // spec -> hash

}

open() { /* no-op */ }

getBytes(hash) {

return this.cas.get(hash) ?? null;

}

putBytes(hash, bytes) {

this.cas.set(hash, bytes);

}

loadLockfile() {

return new Map(this.lockfile);

}

saveLockfile(entries) {

for (const [k, v] of entries) this.lockfile.set(k, v);

}

clear() {

this.cas.clear();

this.lockfile.clear();

}

setVersion(_version) { /* no-op: nothing to invalidate across sessions */ }

getVersion() { return null; }

}