@push.rocks/smartdata/dist_ts/classes.collectionfactory.js

An advanced library for NoSQL data organization and manipulation using TypeScript with support for MongoDB, data validation, collections, and custom data types.

import * as plugins from './plugins.js';
import { SmartdataCollection } from './classes.collection.js';
import { SmartdataDb } from './classes.db.js';
/**
 * Per-SmartdataDb collection cache.
 *
 * Historically this class keyed its cache by class name alone, which meant
 * the first SmartdataDb to request a collection of a given class name
 * "won" — every subsequent call from a different SmartdataDb instance
 * received the cached collection bound to the first db. That silently
 * broke multi-tenant SaaS apps (one db per tenant), tests instantiating
 * multiple SmartdataDbs in sequence, and any in-process db cluster switch.
 *
 * The cache is now keyed by `(SmartdataDb instance, className)` using a
 * WeakMap of db → Map<className, SmartdataCollection>. Entries are GC'd
 * with their parent db automatically.
 */
export class CollectionFactory {
    perDbCollections = new WeakMap();
    getCollection = (nameArg, dbArg) => {
        if (!(dbArg instanceof SmartdataDb)) {
            // Preserve the historical behavior of returning undefined-ish for
            // non-db args. All in-repo callers already guard on instanceof
            // before using the result (see classes.collection.ts).
            return undefined;
        }
        let dbMap = this.perDbCollections.get(dbArg);
        if (!dbMap) {
            dbMap = new Map();
            this.perDbCollections.set(dbArg, dbMap);
        }
        let coll = dbMap.get(nameArg);
        if (!coll) {
            coll = new SmartdataCollection(nameArg, dbArg);
            dbMap.set(nameArg, coll);
        }
        return coll;
    };
    /**
     * @deprecated Internal back-compat shim. The previous field was a public
     * Record<className, SmartdataCollection> but was not part of the
     * documented public API. WeakMap is not iterable, so this getter returns
     * an empty object — anyone actually relying on the old shape would get
     * clean nothing rather than wrong-db data. Will be removed in 8.0.
     */
    get collections() {
        return {};
    }
}
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