Natalia Makishvili

Author: Natalia Makishvili

emitter.js

@@ -1,23 +1,93 @@
 module.exports = function () {
+    var collection = {};
+    var countSeveral = 0;
+    var countEmit = 0;
+    var countThrough;
+
     return {
+        /**
+         * Наполняет collection данными про вызванное событие и соотвествующие ему данные
+         * @param eventName {String}
+         * @param student {Object}
+         * @param callback {Function}
+         */
         on: function (eventName, student, callback) {
+            if (!collection[eventName]) {
+                collection[eventName] = [];
+            }
+
+            var eventItem = {
+                student: student,
+                callback: callback.bind(student)
+            };
 
+            if (eventName.indexOf('.') !== -1) {
+                var parentName = eventName.split('.')[0];
+                var parentEventItems = collection[parentName];
+
+                parentEventItems.forEach(function (item) {
+                    if (item.student === student) {
+                        eventItem.callbackParent = item.callback;
+                    }
+                });
+            }
+            collection[eventName].push(eventItem);
         },
 
+        /**
+         * Удаляет оъект из collection
+         * @param eventName {String}
+         * @param student {Object}
+         */
         off: function (eventName, student) {
+            var events;
+            if (eventName.indexOf('.') === -1) {
+                events = Object.keys(collection).filter(function (name) {
+                    return name.indexOf(eventName) !== -1;
+                });
+            } else {
+                events = [eventName];
+            }
 
+            events.forEach(function (event) {
+                collection[event].forEach(function (item, i) {
+                    if (item.student === student) {
+                        collection[event].splice(i, 1);
+                    }
+                });
+            });
         },
 
+        /**
+         * Вызывает колбеки, которые в collection соотвествуют полученному имени события
+         * @param eventName {String}
+         */
         emit: function (eventName) {
+            countEmit++;
+
+            if (countSeveral && countEmit > countSeveral) {
+                return;
+            }
 
+            if (countThrough && countEmit % countThrough !== 0) {
+                return;
+            }
+
+            var eventItems = collection[eventName];
+            eventItems && eventItems.forEach(function (item) {
+                item.callback();
+                item.callbackParent && item.callbackParent();
+            });
         },
 
         several: function (eventName, student, callback, n) {
-
+            this.on(eventName, student, callback);
+            countSeveral = isNaN(n) ? 0 : n;
         },
 
         through: function (eventName, student, callback, n) {
-
+            this.on(eventName, student, callback);
+            countThrough = n;
         }
     };
 };