ТЕМА: Покодим (уроки программирования для RPG maker MV)

(function () {
 
    // Request
 
    function Request() {
        this.initialize.apply(this, arguments);
    }
 
    Request.prototype.initialize = function (url, params) {
        this.url = url;
        this.params = params;
 
        var request = this;
 
        this.http = new XMLHttpRequest();
        this.http.onreadystatechange = function () {
            if(this.readyState == 4 && this.status == 200) {
                if (request.onFinish) {
                    request.onFinish(this.responseText);
                }
            }
        };
    };
 
    Request.prototype.get = function(onFinish) {
        this._send('GET', onFinish);
    };
 
    Request.prototype.post = function (onFinish) {
        this._send('POST', onFinish);
    };
 
    Request.prototype._send = function(method, onFinish) {
        this.onFinish = onFinish;
 
        this.http.open(method, this.url, true);
        this.http.setRequestHeader('Content-type', 'application/x-www-form-urlencoded');
 
        if (this.params) {
            var paramsStr = this._stringFromRequestParams(this.params);
            this.http.send(paramsStr);
        } else {
            this.http.send(null);
        }
    };
 
    Request.prototype._stringFromRequestParams = function (params) {
        var result = "";
 
        for (var key in params) {
            var val = params[key]
 
            if (result.length > 0) {
                result += `&${key}=${val}`;
            } else {
                result += `${key}=${val}`;
            }
        }
 
        return result;
    };
 
 
    // Chat Client
 
    function LightChat() {
        this.initialize.apply(this, arguments);
    }
 
    LightChat.prototype.initialize = function () {
        this.baseUrl = 'http://rpgmaker.ru';
        this.username = 'Anonymous';
    };
 
    LightChat.prototype._findFormTags = function(url, onFinish) {
        var request = new Request(url);
        request.get(function (html) {
            var returnVal = html.match(/name="return"\svalue="([^"]*?)"/)[1];
            var formTag = html.match(/name="([^"]*?)"\svalue="1"/)[1];
 
            onFinish(returnVal, formTag);
        });
    };
 
    LightChat.prototype._findUsername = function(html) {
        return html.match(/\<a\shref="\/social\/mypage"\>([\w\d]+)\<\/a\>/)[1];
    };
 
    LightChat.prototype.login = function (username, password, onFinish) {
        var me = this;
 
        this._findFormTags(this.baseUrl, function (returnVal, formTag) {
            var url = `${me.baseUrl}/component/users/?task=user.login&Itemid=`;
            var params = {
                'username' : username,
                'passwd' : password,
                'options' : 'com_users',
                'task' : 'user.login',
                'return' : returnVal,
                formTag : '1'
            };
 
            var req = new Request(url, params);
            req.post(function (html) {
                me.username = me._findUsername(html);
                onFinish(me.username);
            });
        });
    };
 
    LightChat.prototype.sendMessage = function(message) {
        var url = "http://rpgmaker.ru/?mode=addshout";
        var params = {'n': this.username, 'c': message, 'u': 'http://', 'h': ''}
 
        var req = new Request(url, params);
        req.post(function (html) {
            console.log('Message sent!');
        });
    };
 
    LightChat.prototype.loadMessages = function (onFinish) {
        var url = `${this.baseUrl}/?mode=getshouts&jal_lastID=0`;
 
        var req = new Request(url);
        req.get(function (html) {
            var rawHistory = html.match(/<div\sid="contenttop">([^\b]+)/)[1];
 
            var historyRawRegex = /(\d+?)\|\|(\d+?)###([^#]+?)###([^#]+?)###([^#]*?)###/ig;
            var messages = new Array();
 
            while (res = historyRawRegex.exec(rawHistory)) {
                messages.push({
                    'messageId' : res[1],
                    'senderId' : res[2],
                    'senderName' : res[3],
                    'avatarUrl' : res[4],
                    'text' : res[5]})
            }
 
            onFinish(messages);
        });
    };
 
 
    // Usage example
 
    var client = new LightChat();
 
    client.login('user', 'password', function (username) {
        console.log(`User logged in as ${username}!`);
        client.sendMessage('Всем дня!');
 
        client.loadMessages(function (messages) {
            for (msg in messages) {
                console.log(`${msg.senderName}: ${msg.text}`)
            }
        });
    });
})();