Первое задание

.gitmodules

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+[submodule "assets/js/EventEmitter"]
+	path = assets/js/EventEmitter
+	url = git://github.com/Wolfy87/EventEmitter.git
+[submodule "assets/js/Heir"]
+	path = assets/js/Heir
+	url = git://github.com/Wolfy87/Heir.git

First_server/lights.html

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+<script type='text/javascript' src="../assets/js/EventEmitter/EventEmitter.js"></script>
+<script type='text/javascript' src="../assets/js/Heir/heir.js"></script>
+
+<script>
+var json = '{"green":4000,"yellow":1000,"red":6000}';
+
+function Traffic_lights(config_file)
+{
+    this.state = null
+    this.switchTime = null;
+
+    this.tram_mode = false;
+    this.wait_for_tram = 3000;
+    this.green_for_tram = 10000;
+    this.percent_of_curr_color = 0.9;
+
+    this._timeout = null
+    this._config = config_file || null;
+    if (this._config)
+        this._config = JSON.parse(this._config)
+
+    Traffic_lights.prototype.toYellow = function () {
+        if (this._timeout) {
+            clearTimeout(this._timeout)
+        }
+        this.switchTime = new Date();
+        this.state = 'yellow'
+        this._timeout = setTimeout(function () {
+            this.toRed();
+        }.bind(this), this._config[this.state])
+    }
+
+    Traffic_lights.prototype.toGreen = function () {
+        if (this._timeout) {
+            clearTimeout(this._timeout)
+        }
+        this.switchTime = new Date();
+        this.state = 'green'
+        this._timeout = setTimeout(function () {
+            this.toYellow();
+        }.bind(this), this._config[this.state])
+    }
+
+    Traffic_lights.prototype.toRed = function () {
+        if (this._timeout) {
+            clearTimeout(this._timeout)
+        }
+        this.switchTime = new Date();
+        this.state = 'red'
+        this._timeout = setTimeout(function () {
+            this.toGreen();
+        }.bind(this), this._config[this.state])
+    }
+
+    Traffic_lights.prototype.getState = function() { // current state
+        if (this.tram_mode)
+            return 'green'
+        else
+            return this.state
+    };
+
+    Traffic_lights.prototype.stopIt = function() { // Stop switching lights
+        if (this._timeout) {
+            clearTimeout(this._timeout)
+        }
+    }
+
+    Traffic_lights.prototype.passTram = function() {
+        console.log("Трамвай на подходе");
+        setTimeout(function() {
+            this.tram_mode = true;
+            console.log("Трамвай пошел");
+            setTimeout(function() {
+                this.tram_mode = false; // Трамвай как-будто не проезжал, таймер все это время шел, как обычно.
+                // Можно, конечно, было понимать, что надо вернуться в старое состояние до трамвая
+                // Проверим, так ли много осталось от текущего цвета, стоит ли в него переходить
+                if (this.switchTime - new Date() > self.percent_of_curr_color * this._config[this.state])
+                    switch(this.state) {
+                        case 'green':
+                            this.toYellow();
+                            break;
+                        case 'yellow':
+                            this.toRed();
+                            break;
+                        case 'red':
+                            this.toGreen();
+                            break;
+                    }
+            }.bind(this), this.green_for_tram)
+        }.bind(this), this.wait_for_tram)
+    }
+
+    // Traffic_lights.prototype.tramPassed = function() {
+
+    // }
+
+    Traffic_lights.prototype.onEventEmmiter = function(event_emmiter) {
+        event_emmiter.addListener('Tram is comming', function() {this.passTram();}.bind(this))
+    }
+
+}
+
+function Tram(){}
+heir.inherit(Tram, EventEmitter); // Tram is a subclass of EventEmmiter
+
+// Creating Objects
+var my_Lights = new Traffic_lights(json);
+my_Lights.toGreen();
+
+var my_tram = new Tram();
+my_Lights.onEventEmmiter(my_tram);
+
+//Asking server for tram state every 7 seconds
+//CORS решен с помощью добавления "Access-Control-Allow-Origin", "*"
+setInterval(function() {
+    var sURL = "http://" + "localhost:3000" + "/tram_api";
+    var xhr = new XMLHttpRequest();
+    xhr.open("GET", sURL, true);
+    xhr.onreadystatechange = function() {
+        if (xhr.readyState == 4) {
+            var resp = JSON.parse(xhr.responseText);
+            //console.log(resp.is_tram_comming);
+            if (resp.is_tram_comming)
+                my_tram.emit("Tram is comming");
+        }
+    }
+    xhr.send();
+}, 7000);
+
+// Tests
+// Check state once in a sec
+intervalID = setInterval(function () {
+    console.log(this.getState());
+}.bind(my_Lights), 1000);
+
+</script>
+
+<button onclick='my_tram.emit("Tram is comming")'>Ручное выпускание трамвая</button>
+<button onclick='my_Lights.stopIt()'>Выключить светофор</button>
+<button onclick='clearInterval(intervalID)'>Закончить проверку состояний</button>

First_server/package.json

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+{
+  "name": "Tram-server",
+  "description": "Second task CRI",
+  "version": "0.0.1",
+  "private": true,
+  "dependencies": {
+    "express": "4.x"
+  }
+}

First_server/server.js

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+var express = require('express');
+var app = express();
+
+var is_tram_comming = 0
+
+setInterval(function () {
+	is_tram_comming = (is_tram_comming += 1) % 2
+    console.log("Changing tram state to: ", is_tram_comming);
+}, 20000);
+
+app.get('/', function(req, res){
+	res.setHeader("Access-Control-Allow-Origin", "*");
+	res.send('The state of tram is: ' + is_tram_comming);
+});
+
+app.get('/tram_api', function(req, res){
+	res.setHeader("Access-Control-Allow-Origin", "*");
+    res.json({ is_tram_comming: is_tram_comming, 
+  	           "permissions": ["http://www.google.com/", "http://*/"], 
+  	         })
+});
+
+var server = app.listen(3000, function() {
+    console.log('Listening on port %d', server.address().port);
+});