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/**
* @project iii-for-vk
* @author Valentin Popov <info@valentineus.link>
* @license See LICENSE.md file included in this distribution.
*/
import urlParseLax from 'url-parse-lax';
import queryString from 'querystring';
import iiiClient from 'iii-client';
import EventEmitter from 'events';
import inherits from 'inherits';
import https from 'https';
import SDK from 'vksdk';
inherits(Bot, EventEmitter);
module.exports = Bot;
/**
* Class representing a Bot.
* @class
*/
function Bot(opts) {
opts = opts || {};
var self = this;
self.uuid = opts.uuid;
self.token = opts.token;
self.appID = opts.appID;
self.appSecret = opts.appSecret;
}
/**
* Initial initialization of all systems and services.
* @param {requestCallback} callback - The callback that handles the response.
*/
Bot.prototype.init = function(callback) {
var self = this;
// Initialize the connection to the social network
self._vk = new SDK({
appId: self.appID,
appSecret: self.appSecret,
https: true,
secure: true
});
// Setting the user's token
self._vk.setToken(self.token);
// Starting services
self._eventLoop();
// Connecting filters
self._filterMessages();
// Connecting to the bot server
iiiClient.connect(self.uuid, (raw) => callback(raw.cuid));
};
/**
* Receive a message by its ID.
* @param {Number} id - The message ID.
* @param {requestCallback} callback - The callback that handles the response.
*/
Bot.prototype.getMessageByID = function(id, callback) {
id = id || false;
var self = this;
self._vk.request('messages.getById', {
message_ids: id,
preview_length: 0
}, (raw) => {
if (raw.error) throw new Error(raw.error.error_msg);
callback(raw.response.items.shift());
});
};
/**
* Simplifies the sending of a message to the user.
* The social network API is used.
* More information: https://vk.com/dev/messages.send
* @param {Object} options - Object with parameters.
* @param {Object} options.user_id - User ID.
* @param {Object} options.message - Message text.
* @param {requestCallback} callback - The callback that handles the response.
*/
Bot.prototype.sendMessageToVK = function(options) {
options = options || {};
var self = this;
self._vk.request('messages.send', options, () => {});
};
/**
* Simplifies sending a message to the bot.
* @param {Object} options - Object with parameters.
* @param {Object} options.cuid - Session identifier.
* @param {Object} options.text - Message text.
* @param {requestCallback} callback - The callback that handles the response.
*/
Bot.prototype.sendMessageToBot = function(options, callback) {
options = options || {};
iiiClient.send(options, (answer) => callback(answer));
};
/**
* The event startup service.
*/
Bot.prototype._eventLoop = function() {
var self = this;
self._getEvents();
self.on('events', (data) => {
self._getEvents(data.ts);
});
};
/**
* Filter events for incoming messages.
* @fires: Bot#messages
*/
Bot.prototype._filterMessages = function() {
var self = this;
self.on('events', function(data) {
data.updates.filter(function(item) {
if (item[0] == 4) self.emit('messages', item);
});
});
};
/**
* Obtaining the Long Poll server address.
* @param {requestCallback} callback - The callback that handles the response.
*/
Bot.prototype._getLongPollServer = function(callback) {
var self = this;
self._vk.request('messages.getLongPollServer', {
need_pts: false
}, (raw) => {
if (raw.error) throw new Error(raw.error.error_msg);
callback(raw.response);
});
};
/**
* Waiting and returning the event.
* @fires: Bot#events
* @param {String=} [ts] - The ID of the last event.
*/
Bot.prototype._getEvents = function(ts) {
var self = this;
// Server address request
self._getLongPollServer(function(raw) {
ts = ts || raw.ts;
// Analysis of the connection address
var url = urlParseLax(raw.server);
// Details: https://vk.com/dev/using_longpoll
var options = queryString.stringify({
act: 'a_check',
key: raw.key,
ts: ts,
wait: 25,
mode: 2,
version: 1
});
// Configuring the connection
var query = {
hostname: url.hostname,
path: url.pathname + '?' + options
};
https.get(query, function(response) {
var answer = {};
response.setEncoding('utf8');
response.on('data', (data) => answer = data);
response.on('end', () => {
answer = JSON.parse(answer);
self.emit('events', answer);
});
}).on('error', (error) => Error(error));
});
};
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