Initial import from local backup (Documents-Playground/pakerpale)

node_modules/cls-bluebird/lib/shimOnCancel.js

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+'use strict';
+
+/*
+ * cls-bluebird
+ * Function to shim `Promise.prototype._resolveFromExecutor`
+ * in order to patch `onCancel` handler in `new Promise()`.
+ */
+
+// Modules
+var shimmer = require('shimmer');
+
+// Exports
+
+/**
+ * Patch `_resolveFromExecutor` proto method to run `onCancel` callbacks in current CLS context.
+ *
+ * @param {Function} Promise - Bluebird Promise constructor to patch
+ * @param {Object} ns - CLS namespace to bind callbacks to
+ * @returns {undefined}
+ */
+module.exports = function(Promise, ns) {
+	// Patch method
+	shimmer.wrap(Promise.prototype, '_resolveFromExecutor', function(_resolveFromExecutorOriginal) {
+		return function(executor) {
+			// Patch executor
+			var executorPatched = function() {
+				var onCancel = arguments[2];
+				if (onCancel) {
+					// Patch onCancel function
+					arguments[2] = function(fn) {
+						// Bind onCancel handler to current CLS context
+						if (typeof fn === 'function') fn = ns.bind(fn);
+						return onCancel.call(this, fn);
+					};
+				}
+
+				return executor.apply(this, arguments);
+			};
+
+			// Call original method
+			return _resolveFromExecutorOriginal.call(this, executorPatched);
+		};
+	});
+};