Method setUsedConditionally

lib/ExportsInfo.js:1283–1328

* Sets used conditionally. * @param {(condition: UsageStateType) => boolean} condition compare with old value * @param {UsageStateType} newValue set when condition is true * @param {RuntimeSpec} runtime only apply to this runtime * @returns {boolean} true when something has changed

(condition, newValue, runtime)

	 * @returns {boolean} true when something has changed
	 */
	setUsedConditionally(condition, newValue, runtime) {
		if (runtime === undefined) {
			if (this._globalUsed === undefined) {
				this._globalUsed = newValue;
				return true;
			}
			if (this._globalUsed !== newValue && condition(this._globalUsed)) {
				this._globalUsed = newValue;
				return true;
			}
		} else if (this._usedInRuntime === undefined) {
			if (newValue !== UsageState.Unused && condition(UsageState.Unused)) {
				this._usedInRuntime = new Map();
				forEachRuntime(runtime, (runtime) =>
					/** @type {UsedInRuntime} */
					(this._usedInRuntime).set(/** @type {string} */ (runtime), newValue)
				);
				return true;
			}
		} else {
			let changed = false;
			forEachRuntime(runtime, (runtime_) => {
				const runtime = /** @type {string} */ (runtime_);
				const usedInRuntime =
					/** @type {UsedInRuntime} */
					(this._usedInRuntime);
				let oldValue =
					/** @type {UsageStateType} */
					(usedInRuntime.get(runtime));
				if (oldValue === undefined) oldValue = UsageState.Unused;
				if (newValue !== oldValue && condition(oldValue)) {
					if (newValue === UsageState.Unused) {
						usedInRuntime.delete(runtime);
					} else {
						usedInRuntime.set(runtime, newValue);
					}
					changed = true;
				}
			});
			if (changed) {
				if (this._usedInRuntime.size === 0) this._usedInRuntime = undefined;
				return true;
			}
		}
		return false;
	}

	/**
	 * Updates used using the provided new value.