Method _readContextTimestampAndHash

lib/FileSystemInfo.js:4175–4301

* @private * @type {Processor<string, ContextTimestampAndHash>}

(path, callback)

	 * @type {Processor<string, ContextTimestampAndHash>}
	 */
	_readContextTimestampAndHash(path, callback) {
		/**
		 * Processes the provided timestamp.
		 * @param {ContextTimestamp} timestamp timestamp
		 * @param {ContextHash} hash hash
		 */
		const finalize = (timestamp, hash) => {
			const result =
				/** @type {ContextTimestampAndHash} */
				(timestamp === class="st">"ignore" ? hash : { ...timestamp, ...hash });
			this._contextTshs.set(path, result);
			callback(null, result);
		};
		const cachedHash = this._contextHashes.get(path);
		const cachedTimestamp = this._contextTimestamps.get(path);
		if (cachedHash !== undefined) {
			if (cachedTimestamp !== undefined) {
				finalize(cachedTimestamp, cachedHash);
			} else {
				this.contextTimestampQueue.add(path, (err, entry) => {
					if (err) return callback(err);
					finalize(
						/** @type {ContextFileSystemInfoEntry} */
						(entry),
						cachedHash
					);
				});
			}
		} else if (cachedTimestamp !== undefined) {
			this.contextHashQueue.add(path, (err, entry) => {
				if (err) return callback(err);
				finalize(cachedTimestamp, /** @type {ContextHash} */ (entry));
			});
		} else {
			this._readContext(
				{
					path,
					fromImmutablePath: () =>
						/** @type {ContextTimestampAndHash | Omit<ContextTimestampAndHash, class="st">"safeTime"> | string | null} */ (
							null
						),
					fromManagedItem: (info) => ({
						safeTime: 0,
						timestampHash: info,
						hash: info || class="st">""
					}),
					fromSymlink: (file, target, callback) => {
						callback(null, {
							timestampHash: target,
							hash: target,
							symlinks: new Set([target])
						});
					},
					fromFile: (file, stat, callback) => {
						this._getFileTimestampAndHash(file, callback);
					},
					fromDirectory: (directory, stat, callback) => {
						this.contextTshQueue.increaseParallelism();