setup browserify and requires

src/hook.js

@@ -0,0 +1,41 @@
+var RSVP = require('rsvp');
+
+//-- Hooks allow for injecting functions that must all complete in order before finishing
+//   They will execute in parallel but all must finish before continuing
+//   Functions may return a promise if they are asycn.
+
+// this.content = new EPUBJS.Hook();
+// this.content.register(function(){});
+// this.content.trigger(args).then(function(){});
+
+function Hook(context){
+  this.context = context || this;
+  this.hooks = [];
+};
+
+// Adds a function to be run before a hook completes
+Hook.prototype.register = function(func){
+  this.hooks.push(func);
+};
+
+// Triggers a hook to run all functions
+Hook.prototype.trigger = function(){
+  var args = arguments;
+  var context = this.context;
+  var promises = [];
+
+  this.hooks.forEach(function(task, i) {
+    var executing = task.apply(context, args);
+
+    if(executing && typeof executing["then"] === "function") {
+      // Task is a function that returns a promise
+      promises.push(executing);
+    }
+    // Otherwise Task resolves immediately, continue
+  });
+
+
+  return RSVP.all(promises);
+};
+
+module.exports = Hook;