From 7b667e22578ceeb27459c26de031b58432f4504c Mon Sep 17 00:00:00 2001
From: Kirill Novak <facevk.02@mail.ru>
Date: Sat, 21 Apr 2018 20:14:10 +0400
Subject: [PATCH] Added session util

---
 src/utils/session.js | 163 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 163 insertions(+)
 create mode 100644 src/utils/session.js

diff --git a/src/utils/session.js b/src/utils/session.js
new file mode 100644
index 0000000..638ef53
--- /dev/null
+++ b/src/utils/session.js
@@ -0,0 +1,163 @@
+"use strict";
+
+const fs = require('fs');
+
+
+
+class EasyVKSession {
+	
+	constructor (vk, dataSession = {}) {
+		
+		let self = this;
+
+		let _props = {
+			session: dataSession,
+			path: vk.params.session_file,
+			vk: vk
+		}
+
+		let canChanged = ["path"];
+
+
+		for (let prop in _props) {
+			let settings = {
+				value: _props[prop]
+			}
+
+			if (canChanged.indexOf(prop) != -1) {
+				settings.configurable = true;
+			}
+
+			Object.defineProperty(self, prop, settings);
+
+		}
+
+		//Use session data with methods
+		for (let prop in self.session) {
+			
+			Object.defineProperty(self, prop, {
+				enumerable: true,
+				configurable: true,
+				value: self.session[prop],
+			});
+
+		}
+
+		return self;
+	}
+
+	/*
+	 *  This method saved your session in file
+	 *  
+	 *  @return {Promise}
+	 *
+	 */
+
+	async save () {
+		
+		let self = this;
+
+		return new Promise((resolve, reject) => {
+			
+			let s;	
+
+			if (!(self.path)) {
+				return reject(new Error('You need set path for session file!'));
+			}
+
+			s = JSON.stringify(self);
+
+			let buf = Buffer.from(s, 'utf8');
+			
+			fs.writeFile(self.path, buf, (err) => {
+				
+				if (err) {
+					reject(err);
+				}
+
+				return resolve({
+					vk: self.vk
+				});
+
+			});
+
+		});
+
+	}
+
+
+	/*
+	 *  This function saves your session and cleaning it, make this empty
+	 *  @returns Promise
+	 *  
+	 */
+
+	async clear () {
+		
+		let self = this;
+
+		return new Promise ((resolve, reject) => {
+			
+			for (let prop in self) {
+				
+				Object.defineProperty(self, prop, {
+					value: undefined,
+					enumerable: true,
+					configurable: true
+				});
+
+			}
+			
+
+			self.save().then(resolve, reject);
+
+		});
+
+	}
+
+	/*
+	 *  This function set up your path session, ou can change sesson path
+	 *	
+	 *  @param {String} path is absolute path for you file
+	 *  @return {Promise}
+	 *
+	 */
+
+	async setPath (path = "") {
+		let self = this;
+
+		return new Promise((resolve, reject) => {
+			
+			fs.writeFile(path, '', (err) => {
+				
+				if (err) {
+					return reject(err);
+				}
+
+
+
+				Object.defineProperty(self, 'path', {
+					configurable: true,
+					value: path
+				});
+
+
+				//Update for easyvk functions, for latest releases
+				self.vk.params.session_file = path;
+
+				return resolve({
+					vk: self.vk
+				});
+
+			});
+
+		});
+	}
+
+
+}
+
+
+
+module.exports = EasyVKSession;
+