Method writeLazy

lib/cache/PackFileCacheStrategy.js:1022–1107

* Processes the provided write. * @param {(lazy: LazyFunction) => (() => PackContentItems | Promise<PackContentItems>)} write write function * @returns {void}

(write)

	 * @returns {void}
	 */
	writeLazy(write) {
		if (!this.outdated && this.lazy) {
			// State B1 or C1
			// this.lazy is still the valid deserialized version
			write(this.lazy);
			return;
		}
		if (!this.outdated && this.content) {
			// State A1
			const map = new Map(this.content);
			// Move to state C1
			this.lazy = SerializerMiddleware.unMemoizeLazy(
				write(() => new PackContentItems(map))
			);
			return;
		}
		if (this.content) {
			// State A2 or C2
			/** @type {Content} */
			const map = new Map();
			for (const item of this.items) {
				map.set(item, this.content.get(item));
			}
			// Move to state C1
			this.outdated = false;
			this.content = map;
			this.lazy = SerializerMiddleware.unMemoizeLazy(
				write(() => new PackContentItems(map))
			);
			return;
		}
		const logger = /** @type {Logger} */ (this.logger);
		// State B2
		const { lazyName } = this;
		/** @type {string | undefined} */
		let timeMessage;
		if (lazyName) {
			// only log once
			this.lazyName = undefined;
			timeMessage = `unpack cache content ${lazyName} (${formatSize(
				this.getSize()
			)})`;
			logger.log(
				`starting to unpack cache content ${lazyName} (${formatSize(
					this.getSize()
				)}) because it's outdated and need to be serialized`
			);
			logger.time(timeMessage);
		}
		const value = /** @type {LazyFunction} */ (this.lazy)();
		this.outdated = false;
		if ("then" in value) {
			// Move to state B1
			this.lazy = write(() =>
				value.then((data) => {
					if (timeMessage) {
						logger.timeEnd(timeMessage);
					}