move discord connection to own file

src/class/ConnectionModule.ts

@@ -0,0 +1,7 @@
+import { Connection } from './User';
+import NotificationMessage from './NotificationMessage';
+
+export default class ConnectionModule {
+    run: (message: NotificationMessage, connection: Connection) => void;
+    init: () => void;
+}

src/class/NotificationMessage.ts

@@ -0,0 +1,22 @@
+export default class NotificationMessage {
+    constructor() {
+        this.title = '';
+        this.body = '';
+        this.footer = null;
+        this.isError = false;
+        this.isImportant = false;
+        this.color = 0xFF9A00;
+    }
+    setTitle(title: string) { this.title = title; return this; }
+    setBody(body: string) { this.body = body; return this; }
+    setFooter(footer: string | null) { this.footer = footer; return this; }
+    setColor(color?: string | number | null) { this.color = color == null ? 0xFF9A00 : color; return this; }
+    error(isError?: boolean | null) { this.isError = isError == null ? true : isError; return this; }
+    important(isImportant?: boolean | null) { this.isImportant = isImportant == null ? true : isImportant; return this; }
+    public title: string;
+    public body: string;
+    public footer: string | null;
+    public isError: boolean;
+    public isImportant: boolean;
+    public color: string | number;
+}

src/class/User.ts

@@ -0,0 +1,16 @@
+export default class User {
+    public creds: {
+        schoolName: string,
+        username: string,
+        password: string,
+        baseURL: string,
+    };
+    public connections: Array<Connection>;
+    public ID: string;
+}
+
+export class Connection {
+    type: string;
+    userID: string;
+    channelID: string;
+}

src/connections/discord.ts

@@ -0,0 +1,57 @@
+import Discord from 'discord.js';
+const client = new Discord.Client();
+
+import User, { Connection } from '../class/User';
+import NotificationMessage from '../class/NotificationMessage';
+
+let run = async (message: NotificationMessage, connection: Connection) => {
+    if (!process.env.BOT_TOKEN) return; // Only run when client is enabled
+    if (!client.readyAt) await new Promise(r => client.once('ready', r)) as void; // Wait for client to log in
+    
+    try {
+        const channel = await client.channels.fetch(connection.channelID).catch(()=>{}) as Discord.DMChannel;
+        if (!channel) return console.log(`Could not find channel: ${channel?.id}`);
+        
+        let embed = new Discord.MessageEmbed()
+            .setAuthor(message.title)
+            .setDescription(message.body)
+            .setColor(message.color);
+        
+        if (message.footer) embed.setFooter(message.footer);
+        
+        // Couldn't figure out how to attach the images in the assets folder, so I use hardcoded URLs instead
+        if (message.isImportant) {
+            embed.setAuthor(embed.author.name, 'https://cdn.discordapp.com/attachments/637695358373199879/824676476405940284/info.png');
+        }
+        
+        if (message.isError) {
+            embed.color = 0xff0000;
+            embed.setAuthor(embed.author.name, 'https://cdn.discordapp.com/attachments/637695358373199879/824676465051828334/error.png' );
+        }
+        
+        if (!embed.timestamp) embed.setTimestamp();
+        channel.send(embed)
+            .catch(console.error);
+    } catch(e) {
+        console.warn(e);
+        
+        // If error didn't occur while sending an error message, attempt to send an error to the user.
+        if (!message.isError) {
+            let msg = new NotificationMessage()
+                .setTitle('Error during delivery')
+                .setBody(`\`\`\`js\n${e}\`\`\``);
+            
+            run(msg.error(), connection)
+                .catch(console.warn);
+        }
+    }
+}
+
+let init = async () => {
+    if (!process.env.BOT_TOKEN) return console.log('Discord: No token specified');
+    
+    client.login(process.env.BOT_TOKEN);
+    client.on('ready', () => console.log(`Discord Bot: Logged in as ${client.user.tag}`));
+}
+
+export { run, init };

src/index.ts

@@ -1,76 +1,95 @@
 import * as dotenv from 'dotenv';
 dotenv.config();
 
-import Discord from 'discord.js';
 import Enmap from 'enmap';
 import fs from 'fs';
 import * as WebUntis from 'webuntis';
-
-const untis = new WebUntis.default(
-    process.env.SCHOOLNAME,
-    process.env.USERNAME,
-    process.env.PASSWORD,
-    process.env.BASEURL
-);
-
-console.log('Discord Bot: Logging in');
-const client = new Discord.Client();
-client.login(process.env.BOT_TOKEN);
-client.on('ready', () => console.log(`Discord Bot: Logged in as ${client.user.tag}`));
+import User from './class/User';
+import NotificationMessage from './class/NotificationMessage';
+import ConnectionModule from './class/ConnectionModule';
 
 const seenMessages = new Enmap({ name: "seenMessages" });
 const knownLessons = new Enmap({ name: "knownLessons" });
 
-const defaultEmbedColor = 0xFF9A00;
-
+const usersDB = new Enmap({ name: "users" }) as Enmap<string|number, User>;
+const untisInstances = [] as Array<{ untis: WebUntis.default, user: User }>;
+usersDB.forEach(user => untisInstances.push({
+    untis: new WebUntis.default(
+        user.creds.schoolName,
+        user.creds.username,
+        user.creds.password,
+        user.creds.baseURL
+    ),
+    user: user
+}));
 
 // Periodically attempt to connect to untis and fetch timetable updates
 let fetchUpdates = () => {
-    console.log('Untis: Logging in');
-    try {
-        untis.login()
-        .then(() => {
-            console.log(`Untis: Logged in`)
-
-            fs.readdirSync(`${__dirname}/modules`).filter(file => file.endsWith('.js')).forEach(file => {
-                require(`${__dirname}/modules/${file}`).run();
-            });
-
-            setTimeout(() => untis.logout().then(() => console.log('Untis: Logged out')), 10000);
-        });
-    } catch(e) {
-        console.error(e);
+    console.log(`Fetching ${untisInstances.length} users.`);
+    untisInstances.forEach(({ untis, user }) => {
         try {
-            let embed = new Discord.MessageEmbed()
-                .setTitle('An error has occurred.')
-                .setDescription(`\`\`\`js\n${e}\`\`\``)
-                .setColor(0xff0000);
-            sendEmbed(embed);
+            // Create database entries
+            if (!knownLessons.get(user.ID)) knownLessons.set(user.ID, {});
+            if (!seenMessages.get(user.ID)) seenMessages.set(user.ID, {});
+            
+            untis.login()
+            .then(() => {
+                fs.readdirSync(`${__dirname}/modules`).filter(file => file.endsWith('.js')).forEach(file => {
+                    require(`${__dirname}/modules/${file}`).run(untis, user);
+                });
+                
+                setTimeout(() => untis.logout().then(() => console.log('Untis: Logged out')), 10000);
+            });
         } catch(e) {
             console.error(e);
+            try {
+                sendMessage(new NotificationMessage()
+                        .setTitle('An error has occurred.')
+                        .setBody(`\`\`\`js\n${e}\`\`\``)
+                        .error(),
+                    user);
+            } catch(e) {
+                console.error(e);
+            }
         }
-    }
+    });
 }
 
 fetchUpdates();
 setInterval(fetchUpdates, 60000);
 
 
-async function sendEmbed(embed: Discord.MessageEmbed) {
-    const channel = await client.channels.fetch(process.env.CHANNEL) as Discord.DMChannel;
-    if (!channel) throw `ERROR: Could not find channel`;
-    
-    if (!embed.timestamp) embed.setTimestamp();
-    channel.send(embed).catch(console.error);
+async function sendMessage(message: NotificationMessage, user: User) {
+    user.connections.forEach(async connection => {
+        let path = require('path').join(__dirname, 'connections', connection.type + '.js') as string;
+        if (fs.existsSync(path)) {
+            try {
+                require(path).run(message, connection);
+            } catch(e) {
+                console.warn(e);
+            }
+        } else {        
+            console.log(`Unknown connection type: ${connection.type}`);
+        }
+    });
 }
 
 export default {
-    untis: untis,
-    bot: client,
-    defaultEmbedColor: defaultEmbedColor,
-    sendEmbed: sendEmbed,
+    untisInstances,
+    usersDB,
+    sendEmbed: sendMessage,
     db: {
         seenMessages: seenMessages,
         knownLessons: knownLessons
     }
-};
+};
+
+
+// Initialize clients in dist/connections/*
+fs.readdirSync(`${__dirname}/connections`).filter(file => file.endsWith('.js')).forEach(file => {
+    (require(`${__dirname}/connections/${file}`) as ConnectionModule).init();
+});
+
+// Run tasks in dist/tasks/*
+fs.readdirSync(`${__dirname}/tasks`).filter(file => file.endsWith('.js')).forEach(file =>
+    require(`${__dirname}/tasks/${file}`));

src/modules/scanForNotifications.ts

@@ -1,23 +1,23 @@
 import * as WebUntis from 'webuntis';
 import main from '../index';
-import Discord from 'discord.js';
-const { bot, defaultEmbedColor, untis, db, sendEmbed } = main;
+import User from '../class/User';
+import NotificationMessage from '../class/NotificationMessage';
+const { db, sendEmbed } = main;
 
-export  async function run() {
+export  async function run(untis: WebUntis.default, user: User) {
     let news = await untis.getNewsWidget(new Date(), true);
     if (!news) return;
 
     news.messagesOfDay.forEach(message => {
-        if (db.seenMessages.get(`${message.id}`)) return;
+        if (db.seenMessages.get(user.ID, `${message.id}`)) return;
         console.log('New message found: ' + message.text);
-        let embed = new Discord.MessageEmbed()
-            .setAuthor('Notification')
-            .setColor(defaultEmbedColor)
+        let notif = new NotificationMessage()
+            .setTitle('Notification')
             .setTitle(message.subject)
-            .setDescription(message.text.replace(/\<br\>/g, "\n"))
+            .setBody(message.text.replace(/\<br\>/g, "\n"))
             .setFooter(`Notification ID: ${message.id}`);
         
-        sendEmbed(embed);
-        db.seenMessages.set(`${message.id}`, true);
+        sendEmbed(notif, user);
+        db.seenMessages.set(user.ID, true, `${message.id}`);
     });
 }

src/modules/scanForTimetableChanges.ts

@@ -1,15 +1,16 @@
 import * as WebUntis from 'webuntis';
 import main from '../index';
-import Discord from 'discord.js';
-const { bot, defaultEmbedColor, untis, db, sendEmbed } = main;
+import User from '../class/User';
+import NotificationMessage from '../class/NotificationMessage';
+const { db, sendEmbed } = main;
 
-export  async function run() {
+export  async function run(untis: WebUntis.default, user: User) {
     let timetable = await untis.getOwnTimetableForRange(new Date(Date.now() - 86400000), new Date(Date.now() + (86400000 * 7)), true);
-
+    
     let sentClasses = {};
-
+    
     timetable.forEach(lesson => {
-        let kLesson = db.knownLessons.get(`${lesson.id}`);
+        let kLesson = db.knownLessons.get(user.ID, `${lesson.id}`);
         if (kLesson && hasChanged(lesson, kLesson)) {
             if (sentClasses['' + (lesson.sg || lesson.su?.[0]?.id) + ' -- ' + lesson.date]) return;
             let dateInfo = {
@@ -24,10 +25,8 @@ export  async function run() {
             
             let weekDay = ['Sunday', 'Monday', 'Thursday', 'Wednesday', 'Thursday', 'Friday', 'Saturday'][date.getDay()];
             
-            let embed = new Discord.MessageEmbed()
-                .setTitle(`Lesson updated`)
-                .setColor(defaultEmbedColor)
-                .setAuthor(`${weekDay}, ${date.getDate()}. ${date.getMonth() + 1}.: ${lesson.sg || '(Unnamed lesson)'} - ${lesson.te[0].longname || 'No teacher'}`);
+            let notif = new NotificationMessage()
+                .setTitle(`${weekDay}, ${date.getDate()}. ${date.getMonth() + 1}.: ${lesson.sg || '(Unnamed lesson)'} - ${lesson.te[0].longname || 'No teacher'}`);
             
             let desc = ``;
 
@@ -69,15 +68,15 @@ export  async function run() {
             // Change the embed color when teacher ID is 0.
             // Teacher ID 0 means that the class is canelled (at least on my school),
             // although I don't know if this is always the case.
-            if (lesson.code == 'irregular' || lesson.te[0].id == 0) embed.setColor('A781B4');
+            if (lesson.code == 'irregular' || lesson.te[0].id == 0) notif.setColor('A781B4');
 
-            embed.setDescription(desc);
+            notif.setBody(desc);
             sentClasses['' + (lesson.sg || lesson.su?.[0]?.id) + ' -- ' + lesson.date] = true;
-            sendEmbed(embed);
+            sendEmbed(notif, user);
             console.log(`Sent timetable update`);
-            db.knownLessons.set(`${lesson.id}`, lesson);
+            db.knownLessons.set(user.ID, lesson, `${lesson.id}`);
         }
-        else db.knownLessons.set(`${lesson.id}`, lesson);
+        else db.knownLessons.set(user.ID, lesson, `${lesson.id}`);
     });
 }
 

src/tasks/cleanDB.ts

@@ -0,0 +1,46 @@
+import main from '../index';
+const { db } = main;
+
+/**
+ * To-Do:
+ * - Remove invalid entries from usersDB
+ * - Clean up seenMessages DB
+ */
+
+// Deletes old, unneeded entries from the database
+const run = async () => {
+    // Known lessons DB
+    try {
+        let deleted = 0;
+        db.knownLessons.forEach(userDB => {
+            Object.entries(userDB).forEach(data => {
+                let key: string | number = data[0];
+                let entry: any = data[1];
+                if (!entry.date || unfuckDate(entry.date).getTime() < Date.now() - (86400000 * 2)) {
+                    deleted++;
+                    db.knownLessons.delete(key);
+                }
+            });
+        });
+        if (deleted > 0) console.log(`Cleared ${deleted} entries from knownLessons`);
+    } catch(e) {
+        console.error(e);
+    }
+}
+
+let unfuckDate = (date: number): Date => {
+    let dateInfo = {
+        year: Number(`${date}`.substr(0, 4)),
+        month: Number(`${date}`.substr(4, 2)),
+        day: Number(`${date}`.substr(6, 2))
+    }
+    let newDate = new Date()
+        newDate.setFullYear(dateInfo.year);
+        newDate.setMonth(dateInfo.month - 1);
+        newDate.setDate(dateInfo.day);
+    
+    return newDate;
+}
+
+run();
+setInterval(run, 1000 * 60 * 60 * 12); // Run every 12 hours