1 files changed, 56 insertions, 0 deletions
diff --git a/node_modules/tapable/lib/HookMap.js b/node_modules/tapable/lib/HookMap.js
new file mode 100644
index 0000000..0397d8e
--- /dev/null
+++ b/node_modules/tapable/lib/HookMap.js
@@ -0,0 +1,56 @@
+/*
+	MIT License http://www.opensource.org/licenses/mit-license.php
+	Author Tobias Koppers @sokra
+*/
+"use strict";
+
+class HookMap {
+	constructor(factory) {
+		this._map = new Map();
+		this._factory = factory;
+		this._interceptors = [];
+	}
+
+	get(key) {
+		return this._map.get(key);
+	}
+
+	for(key) {
+		const hook = this.get(key);
+		if (hook !== undefined) {
+			return hook;
+		}
+		let newHook = this._factory(key);
+		const interceptors = this._interceptors;
+		for (let i = 0; i < interceptors.length; i++) {
+			newHook = interceptors[i].factory(key, newHook);
+		}
+		this._map.set(key, newHook);
+		return newHook;
+	}
+
+	intercept(interceptor) {
+		this._interceptors.push(
+			Object.assign(
+				{
+					factory: (key, hook) => hook
+				},
+				interceptor
+			)
+		);
+	}
+
+	tap(key, options, fn) {
+		return this.for(key).tap(options, fn);
+	}
+
+	tapAsync(key, options, fn) {
+		return this.for(key).tapAsync(options, fn);
+	}
+
+	tapPromise(key, options, fn) {
+		return this.for(key).tapPromise(options, fn);
+	}
+}
+
+module.exports = HookMap;