add node modules

node_modules/before-after-hook/lib/register.js

@@ -0,0 +1,27 @@
+module.exports = register;
+
+function register(state, name, method, options) {
+  if (typeof method !== "function") {
+    throw new Error("method for before hook must be a function");
+  }
+
+  if (!options) {
+    options = {};
+  }
+
+  if (Array.isArray(name)) {
+    return name.reverse().reduce(function (callback, name) {
+      return register.bind(null, state, name, callback, options);
+    }, method)();
+  }
+
+  return Promise.resolve().then(function () {
+    if (!state.registry[name]) {
+      return method(options);
+    }
+
+    return state.registry[name].reduce(function (method, registered) {
+      return registered.hook.bind(null, method, options);
+    }, method)();
+  });
+}