commit 57f4d33134f411b6fe789a4d05be81cfa7a51b72
Author: Sagi Dayan <sagidayan@gmail.com>
Date:   Tue Jun 25 23:20:05 2019 -0400

    initial commit

diff --git a/.gitignore b/.gitignore
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+users.json
+# Created by https://www.gitignore.io/api/node,linux
+
+### Linux ###
+*~
+
+# temporary files which can be created if a process still has a handle open of a deleted file
+.fuse_hidden*
+
+# KDE directory preferences
+.directory
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+# Linux trash folder which might appear on any partition or disk
+.Trash-*
+
+# .nfs files are created when an open file is removed but is still being accessed
+.nfs*
+
+### Node ###
+# Logs
+logs
+*.log
+npm-debug.log*
+yarn-debug.log*
+yarn-error.log*
+
+# Runtime data
+pids
+*.pid
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+*.pid.lock
+
+# Directory for instrumented libs generated by jscoverage/JSCover
+lib-cov
+
+# Coverage directory used by tools like istanbul
+coverage
+
+# nyc test coverage
+.nyc_output
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+# Grunt intermediate storage (http://gruntjs.com/creating-plugins#storing-task-files)
+.grunt
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+# Bower dependency directory (https://bower.io/)
+bower_components
+
+# node-waf configuration
+.lock-wscript
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+# Compiled binary addons (http://nodejs.org/api/addons.html)
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+
+# Dependency directories
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+# End of https://www.gitignore.io/api/node,linux
diff --git a/.jshintrc b/.jshintrc
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--- /dev/null
+++ b/.jshintrc
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+{
+    "esnext": true
+}
diff --git a/README.md b/README.md
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+# Telegram Bot that saves photos
+
+
+## Things you will need to do to run it
+
+ - Get a telegram bot token from the botFather
+  - Just talk to [BotFather](https://telegram.me/botfather)  and follow a few simple steps. Once you've created a bot and received your authorization token, copt and paste it into the config file. (botId)
+ - Make sure you have NodeJS and npm installed
+ - Install dependencies.
+  - ``` $ npm install```
+
+All done :)
+
+## Configuration
+
+This bot can be configured via the config.js file.
+Keep the structure of this file as is, and change the values to your needs.
+
+## Running the bot
+
+I would suggest to use [pm2](http://pm2.keymetrics.io) to manage this process. but its your call...
+
+Production Run:
+```
+$ node index.js
+```
+
+Debug Run:
+```
+$ node index.js --printMessage
+```
+> This will print out the firs message the bot receives and will exit.<br>
+So you can see user ID and other data attached to the message.
diff --git a/botEngine.js b/botEngine.js
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+// Node imports
+const fs = require('fs');
+const path = require('path');
+
+// Telegram Module
+const TelegramBot = require('node-telegram-bot-api');
+
+// Congifuration
+const config = require('./config');
+
+let admin_chatId;
+let authorizedUsers;
+let telegram;
+const SLIDESHOW_LOCATION = config.slideShowFolderPath;
+
+/**
+ * Runs the bot.
+ * @param  {Array} args CLI arguments
+ * @return {void}
+ */
+let runBot = (args) => {
+  loadDB();
+  telegram = new TelegramBot(config.botId, {
+    polling: true
+  });
+  telegram.on('message', (msg) => {
+    const chatId = msg.chat.id;
+    if (args.indexOf('--printMessage') > 0) {
+      console.log(JSON.stringify(msg, null, 2));
+      process.exit(0);
+    }
+    if (userAllowd(msg)) {
+      handleMessage(msg);
+    } else {
+      let message = config.messages.sendieResponse.unauthorizedUser;
+      message = message.replace('{username}', msg.from.username);
+      message = message.replace('{messageObj}', JSON.stringify(msg, null, 2));
+      telegram.sendMessage(chatId, message);
+      message = config.messages.adminNotifications.unauthorizedUser;
+      message = message.replace('{username}', msg.from.username);
+      message = message.replace('{messageObj}', JSON.stringify(msg, null, 2));
+      console.warn(message);
+      notifyAdmin(message);
+    }
+  });
+  console.log('Telegram bot is alive and listening!');
+}
+
+/**
+ * Save a photo to config.slideShowFolderPath
+ * @param  {string}   fileId   fileId (received from telegram)
+ * @param  {Function} callback post save function - args: {Error} error, {string} filePath
+ * @return {void}
+ */
+function storeFile(fileId, callback) {
+  telegram.downloadFile(fileId, SLIDESHOW_LOCATION)
+    .then((filePath) => {
+      let message = config.messages.sendieResponse.fileSuccessfullySaved;
+      message = message.replace('{fileLocation}', filePath);
+      callback(null, filePath);
+    })
+    .catch((err) => {
+      callback(err);
+    });
+}
+
+let storeFileCallback = (err, filePath, chatId, photoId) => {
+  let response;
+  if (err) {
+    console.error('Failed to save file...[ERROR]\n', err);
+    response = config.messages.sendieResponse.failedToSaveFile;
+    response = response.replace('{error}', err);
+    telegram.sendMessage(chatId, response);
+    response = config.messages.sendieResponse.failedToSaveFile;
+    response = response.replace('{error}', err);
+    if (admin_chatId !== chatId) notifyAdmin(response, photoId);
+  } else {
+    response = config.messages.sendieResponse.fileSuccessfullySaved;
+    response = response.replace('{fileLocation}', filePath);
+    telegram.sendMessage(chatId, response);
+    response = config.messages.adminNotifications.fileSuccessfullySaved;
+    response = response.replace('{fileLocation}', filePath);
+    if (admin_chatId !== chatId) notifyAdmin(response, photoId);
+  }
+};
+
+/**
+ * This function is called on every message from an authorized user.
+ * @param  {JSON} msg telegram message object
+ * @return {void}
+ */
+let handleMessage = (msg) => {
+  const chatId = msg.chat.id;
+  if (msg.photo || (msg.document && msg.document.mime_type.indexOf('image/') === 0)) { // Handle Images
+    if (msg.photo) {
+      storeFile(msg.photo[msg.photo.length - 1].file_id, (err, filePath) => {
+        storeFileCallback(err, filePath, chatId, msg.photo[msg.photo.length - 1].file_id);
+      });
+    } else { // document - uncompressed photo
+      storeFile(msg.document.file_id, (err, filePath) => {
+        storeFileCallback(err, filePath, chatId, msg.document.file_id);
+      });
+    }
+  } else if (msg.contact) { // Handle Contact
+    addRemoveUser(msg.contact, msg.from);
+  } else {
+    // send a message to the chat acknowledging receipt of their message
+    let message = config.messages.sendieResponse.unableToDoThat;
+    message = message.replace('{username}', msg.from.username);
+    telegram.sendMessage(chatId, message);
+  }
+};
+
+/**
+ * Check if a user is authorized to interact with this bot
+ * @param  {JSON} msg telegram message object
+ * @return {boolean}     true/false
+ */
+let userAllowd = (msg) => {
+  if (msg.from.id === config.admin.id) {
+    admin_chatId = msg.chat.id;
+    return true;
+  }
+  if (config.permissions.allowAll) return true;
+  if (authorizedUsers.indexOf(msg.from.id) >= 0) return true;
+  return false;
+};
+
+/**
+ * Sends a message to admin. Only if config.admin.notifyActivity is true
+ * @param  {string} msg      message to send
+ * @param  {string} photo_id the photo to send to admin incase config.notifyActivity.sendPhoto is true
+ * @return {void}
+ */
+let notifyAdmin = (msg, photo_id) => {
+  if (admin_chatId != null && config.admin.notifyActivity) {
+    telegram.sendMessage(admin_chatId, msg);
+    if (photo_id && config.admin.sendPhotoOnSave) telegram.sendPhoto(admin_chatId, photo_id);
+  }
+};
+
+/**
+ * Will add/remove a user from authorized users list. (Saved in a file)
+ * If a user is not in the list, it will add him. Else remove him.
+ * Will notify admin if wanted (config.admin.notifyActivity) and send the initiating user on fail/success
+ * @param {JSON} contact Telegram contact object. The user to add/remove
+ * @param {JSON} from    Telegram user object. Who wanted to add/remove the contact
+ */
+let addRemoveUser = (contact, from) => {
+  if (!config.permissions.allowAddingUsers) {
+    // Ignore...
+    console.warn('Attempt to add/remove a user. this functionality is disabled.');
+    return;
+  } else {
+    if (from.id != config.admin.id && !config.permissions.allowNonAdminToAddUsers) {
+      telegram.sendMessage(from.id, config.messages.sendieResponse.noPermissions);
+      console.warn('Attempt to add/remove a user from an unpermited user. id: ', from.id);
+      return;
+    }
+  }
+  let toAdd = true;
+  if (authorizedUsers.indexOf(contact.user_id) < 0) {
+    // Add user
+    authorizedUsers.push(contact.user_id);
+  } else {
+    // remove user
+    toAdd = false;
+    authorizedUsers.splice(authorizedUsers.indexOf(contact.user_id), 1);
+  }
+  if (saveToDB()) {
+    let message;
+    if (toAdd) message = config.messages.sendieResponse.userAdded;
+    else message = config.messages.sendieResponse.userRemoved;
+    message = message.replace('{username}', contact.first_name);
+    telegram.sendMessage(from.id, message); // response to the user that added the new one
+    // Not supported yet - a bot can't start a chat with a new user... so can't do this.
+    // if(toAdd) message = config.messages.userAdded.added;
+    // else message = config.messages.userRemoved.removed;
+    // message = message.replace('{username_add_rem}', contact.first_name);
+    // message = message.replace('{username}', from.first_name);
+    // telegram.sendMessage(contact.user_id, message); // Notify the new/old user
+    if (toAdd) message = config.messages.adminNotifications.userAdded;
+    else message = config.messages.adminNotifications.userRemoved;
+    message = message.replace('{username_add_rem}', contact.first_name);
+    message = message.replace('{username}', from.first_name);
+    if (from.id != config.admin.id) notifyAdmin(message); // notifyAdmin
+  } else {
+    console.log('Failed to save DB!!!');
+  }
+}
+
+/**
+ * Load authorized users list from disk (Reading a JSON file). If not exists (Usually on first run), will create the file.
+ * Incase the file is not in valid JSON format. will kill process with err code 1.
+ * @return {void}
+ */
+let loadDB = () => {
+  let dbLocation = config.DBLocation;
+  if (dbLocation[dbLocation.length - 1] != '/') dbLocation += '/users.json';
+  else dbLocation += 'users.json';
+  try {
+    data = fs.readFileSync(path.resolve(dbLocation));
+    try {
+      authorizedUsers = JSON.parse(data.toString());
+      console.log('DB loaded. AuthorizedUsers: ', authorizedUsers);
+    } catch (err) {
+      console.error('DB file is corrupted. Please delete the file', dbLocation, 'And rerun this service');
+      process.exit(1);
+    }
+  } catch (err) {
+    authorizedUsers = [];
+    if (saveToDB()) {
+      console.log('DB was created. Everything is Okay.');
+    } else {
+      console.error('Unable to read from DB. Error:\n', err);
+      process.exit(1);
+    }
+  }
+}
+
+/**
+ * Saves the authorized users list to disk. (config.DBLocation)
+ * @return {boolean} true=success, false=fail
+ */
+let saveToDB = () => {
+  let dbLocation = config.DBLocation;
+  if (dbLocation[dbLocation.length - 1] != '/') dbLocation += '/users.json';
+  else dbLocation += 'users.json';
+  try {
+    fs.writeFileSync(dbLocation, JSON.stringify(authorizedUsers));
+    return true;
+  } catch (err) {
+    console.error('Failed to save to DB... ERROR:\n', err);
+    return false;
+  }
+}
+
+/**
+ * Bot engine exported interface
+ * @type {Object}
+ */
+module.exports = {
+  runBot: runBot
+}
diff --git a/config.js b/config.js
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+/**
+ * Configuration
+ */
+module.exports = {
+    botId: 'xxxxxxxxxx', // Bot token/Id - Get if from botFather
+    slideShowFolderPath: '/full/path/to/folder', // Where to save files
+    DBLocation: '.', // Location of DB file. You need to have permissions to read/write in that location
+    permissions: {
+        allowAll: false, // allow any telegram user to add photos
+        allowAddingUsers: true, // accept contacts as authorized users?
+        allowNonAdminToAddUsers: false // allow non admin users to add contacts to authorized users
+    },
+    admin: {
+        notifyActivity: true,
+        sendPhotoOnSave: true, // send admin the photo that somone else have saved
+        id: 1234 // [Number] Your Telegram UserId
+    },
+    messages: {
+      adminNotifications:{
+        unauthorizedUser: 'Unauthorized user: {username}\nMessage:\n{messageObj}', // Plaseholers: {username}, {messageObj}
+        fileSuccessfullySaved: 'A photo was added.\n', // Plaseholers: {fileLocation}
+        failedToSaveFile: 'Psst...\nYou might want to know, that i have failed you. a fail was not saved.\nError:\n{error}', // Placeholders: {error}
+        userAdded: 'The user {username} added {username_add_rem} to the system', // Plaseholers: {username}, {username_add_rem}
+        userRemoved: 'The user {username} removed {username_add_rem} from the system' // Plaseholers: {username}, {username_add_rem}
+      },
+      sendieResponse: {
+        unauthorizedUser: 'Hi {username}, \n Who the fuck are you?!\n I have notified my creator and he will hunt you down. I would suggest that you disconnect from the Internet', // Plaseholers: {username}, {messageObj}
+        fileSuccessfullySaved: 'Added to your slideshow. Saved at: {fileLocation}', // Plaseholers: {fileLocation}
+        failedToSaveFile: 'Woops,\nsome thing happend... Can\'t save your photo.\nTry Again later', // Placeholders: {error}
+        unableToDoThat: 'Hi {username},\nIm unable to understand you. I\'m able only to accept photos and contacts', // Placeholders: {username}
+        noPermissions: 'You have no permissions to do that...',
+        userAdded: 'Okay, {username} was added as a trusted user.', // Placeholders: {username}
+        userRemoved: 'Sure, I\'ll stop supporting {username}.' // Plaseholers: {username}
+      },
+      userAdded: { // Not supported yet
+        added: 'Hi {username_add_rem},\n{username} added you as a trusted user. this means that you can send me photos to add to the slide show! Try it now' // Plaseholers: {username}, {username_add_rem}
+      },
+      userRemoved:{ // Not supported yet
+        removed: 'Hi {username_add_rem},\n{username} removed you from my system... It\'s not you, it\'s me :(' // Plaseholers: {username}, {username_add_rem}
+      }
+    }
+}
diff --git a/index.js b/index.js
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+/**
+ * A Telegram bot thats saves your photos locally
+ *
+ */
+
+// Import bot engine module
+const botEngine = require('./botEngine');
+console.log('Initializing bot...');
+//Run the bot.
+botEngine.runBot(process.argv);
diff --git a/package.json b/package.json
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+++ b/package.json
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+{
+  "name": "telegram_bot",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "",
+  "license": "ISC",
+  "dependencies": {
+    "node-telegram-bot-api": "^0.27.1"
+  }
+}