New version of this thing

.gitignore

@@ -5,3 +5,4 @@ db.json
 lib/
 .yarn/cache
 .yarn/install-state.gz
+persist/

Dockerfile

@@ -1,21 +1,29 @@
+FROM node:19 as builder
+
+RUN mkdir -p /app
+WORKDIR /app
+
+COPY ["package.json", "yarn.lock", ".yarnrc.yml", "/app/"]
+COPY ["src", "/app/src"]
+
+RUN yarn install
+RUN yarn build
+
 FROM node:19 
 
 LABEL maintainer="Fabian Stamm <dev@fabianstamm.de>"
 
-RUN apt-get update
+RUN mkdir -p /app
-
+WORKDIR /app
-RUN mkdir -p /usr/src/app
-WORKDIR /usr/src/app
 
 ENV NODE_ENV=production
 
 COPY ["package.json", "yarn.lock", ".yarnrc.yml", "/usr/src/app/"]
-COPY ".yarn" /usr/src/app/.yarn
 
 RUN yarn install
 
-COPY lib/ /usr/src/app/lib
+COPY --from=builder lib/ /app/lib
 
-VOLUME [ "/usr/src/app/logs", "/usr/src/app/persist"]
+VOLUME [ "/app/logs", "/app/persist"]
 
-CMD ["npm", "run", "start"]
+CMD ["node", "lib/index.js"]

example_feeds.txt

@@ -0,0 +1,2 @@
+https://www.netcup-sonderangebote.de/feed
+https://xkcd.com/rss.xml

package.json

@@ -9,7 +9,9 @@
     "scripts": {
         "start": "node lib/index.js",
         "build": "tsc",
-        "dev": "nodemon -e ts --exec 'node --loader ts-node/esm src/index.ts'"
+        "dev-ts": "tsc -w",
+        "dev-node": "nodemon lib/index.js",
+        "dev": "run-p dev-ts dev-node"
     },
     "devDependencies": {
         "@types/dotenv": "^8.2.0",
@@ -17,6 +19,7 @@
         "@types/node": "^18.15.11",
         "@types/node-fetch": "^3.0.3",
         "nodemon": "^2.0.22",
+        "npm-run-all": "^4.1.5",
         "ts-node": "^10.9.1",
         "typescript": "^5.0.4"
     },
@@ -28,9 +31,15 @@
         "lodash": "^4.17.21",
         "lowdb": "^5.1.0",
         "node-fetch": "^3.3.1",
+        "pino": "^8.11.0",
+        "pino-pretty": "^10.0.0",
+        "reflect-metadata": "^0.1.13",
         "rss-parser": "^3.13.0",
+        "run-p": "^0.0.0",
+        "sqlite3": "^5.1.6",
         "ssl-root-cas": "^1.3.1",
-        "telegraf": "^4.12.2"
+        "telegraf": "^4.12.2",
+        "typeorm": "^0.3.15"
     },
     "packageManager": "yarn@3.5.0"
 }

src/data_source.ts

@@ -0,0 +1,25 @@
+import "reflect-metadata";
+import { DataSource } from "typeorm";
+import { Feed } from "./models/Feed.js";
+import { User } from "./models/User.js";
+import { Post } from "./models/Post.js";
+import Logging from "./log.js";
+
+export const AppDataSource = new DataSource({
+   type: "sqlite",
+   database: "persist/db.sqlite",
+   logging: false,
+   entities: [User, Feed, Post],
+   subscribers: [],
+   migrations: [],
+})
+
+export const appDataSourceReady = AppDataSource.initialize().then(() => {
+   Logging.info("Database initialized!");
+   return AppDataSource.synchronize().then(() => {
+      Logging.info("Database synchronized!");
+   })
+}).catch((err) => {
+   Logging.info("Database initialization failed!");
+   Logging.error(err);
+});

src/feed_fetcher.ts

@@ -0,0 +1,117 @@
+import { LessThan } from "typeorm";
+import { AppDataSource } from "./data_source.js";
+import Logging from "./log.js";
+import { Feed } from "./models/Feed.js";
+import { createHash } from "crypto";
+import rss from "rss-parser";
+import { Post } from "./models/Post.js";
+import bot from "./telegram.js";
+
+interface RSSFeed {
+   title: string;
+   language: string;
+   description: string;
+   copyright: string;
+
+   items: RSSFeedItem[];
+}
+
+interface RSSFeedItem {
+   title: string;
+   link: string;
+   content: string,
+   contentSnippet: string;
+   guid: string;
+}
+
+function calculateHash(item: RSSFeedItem) {
+   let hash = createHash("sha512");
+   if (item.content)
+      hash.update(item.content);
+   if (item.guid)
+      hash.update(item.guid);
+   if (item.title)
+      hash.update(item.title);
+   if (item.link)
+      hash.update(item.link);
+   if (item.contentSnippet)
+      hash.update(item.contentSnippet);
+   return hash.digest("hex");
+}
+
+async function checkFeed(feed: Feed) {
+   Logging.info("Fetching feed: %s", feed.url);
+   let data = await fetch(feed.url).then(res => res.text());
+   Logging.info("Received Data");
+   Logging.debug(data);
+
+   const parser = new rss();
+   Logging.info("Parsing feed");
+   let feedData = await parser.parseString(data).catch(err => Logging.error(err)) as RSSFeed;
+   Logging.info("Parsed feed");
+
+   Logging.info("Checking for new items");
+
+
+   for (let entry of feedData.items) {
+      let hash = calculateHash(entry);
+      let post = await AppDataSource.manager.findOne(Post, {
+         where: {
+            feed,
+            hash
+         }
+      });
+      if (!post) {
+         post = AppDataSource.manager.create(Post, {
+            feed,
+            hash
+         })
+
+         const decode = (inp) => inp;
+
+         feed.subscriber.map(async sub => {
+            bot.telegram.sendMessage(
+               sub.chatid,
+               entry.guid + "\n" + decode(entry.title) + "\n\n" + decode(entry.contentSnippet)
+            ).catch(err => Logging.error(err)).then(() => Logging.debug("Message Sent"))
+         })
+
+         await AppDataSource.manager.save(post);
+      }
+   }
+
+
+   // Logging.debug(feedData.items.length, feedData.items.map(e => calculateHash(e)));
+   // const newItems = feedData.items.filter(item => !feed.itemExists(item));
+
+   // // Sending notifications
+   // await sendFeedTelegraf(feed, newItems);
+
+   // feed.addItems(newItems);
+}
+
+// const FEED_CHECK_INTERVAL = 1000 * 60 * 60;
+const FEED_CHECK_INTERVAL = 1000 * 30;
+
+export default async function checkFeeds() {
+   while (true) {
+      let feed = await AppDataSource.manager.findOne(Feed, {
+         where: {
+            lastCheck: LessThan(new Date(Date.now() - FEED_CHECK_INTERVAL))
+         },
+         relations: {
+            subscriber: true
+         }
+      })
+
+      if (!feed) {
+         await new Promise(y => setTimeout(y, 1000));
+         continue;
+      }
+
+      await checkFeed(feed);
+
+      feed.lastCheck = new Date();
+      await AppDataSource.manager.save(feed);
+   }
+}

src/index.ts

@@ -1,230 +1,18 @@
-// require('https').globalAgent.options.ca = require('ssl-root-cas/latest').create();
-// require('ssl-root-cas').inject();
-process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
 
-import * as _Logging from "@hibas123/nodelogging";
+import { AppDataSource, appDataSourceReady } from "./data_source.js";
-import { createHash } from "crypto";
+import checkFeeds from "./feed_fetcher.js";
-import * as dotenv from "dotenv";
+import Logging from "./log.js";
-import { decode } from "html-entities";
+import { User } from "./models/User.js";
+import bot from "./telegram.js";
 
-import fetch from "node-fetch";
+appDataSourceReady.then(() => {
-import rss from "rss-parser";
+   return Promise.allSettled([
-import { Telegraf } from "telegraf";
+      bot.launch({}),
-import { message } from "telegraf/filters";
+      checkFeeds()
-import * as fs from "fs";
+   ])
-import lodash from 'lodash'
+}).then(() => {
-
+   Logging.info("Exiting...");
-const Logging = (_Logging.default as any).default as typeof _Logging.default;
+}).catch(err => {
-
+   Logging.error(err);
-Promise.resolve().then(async () => {
+   process.exit(1);
-    const { Low, LowSync } = await import("lowdb");
+});
-    // @ts-ignore
-    const { JSONFileSync } = await import("lowdb/node") as any;
-
-    class LowWithLodash<T> extends LowSync<T> {
-        chain: lodash.ExpChain<this['data']> = lodash.chain(this).get('data')
-    }
-
-    dotenv.config();
-    const parser = new rss();
-    // const entities = new AllHtmlEntities();
-
-    if (!fs.existsSync("./persist")) {
-        fs.mkdirSync("./persist")
-    }
-
-    // @ts-ignore
-    const adapter = new JSONFileSync<{ feeds: IDBFeed[] }>("persist/db.json");
-    const db: any = new LowWithLodash(adapter);
-    db.read();
-
-    db.chain.defaults({ feeds: [] });
-    db.write();
-
-    interface IDBFeed {
-        url: string;
-        subscriber: number[];
-        oldEntries: string[];
-    }
-
-    class Database {
-        static findFeed(url: string): DBFeed {
-            const feed = db.chain.get("feeds").find(e => e.url === url).value();
-            return feed ? new DBFeed(feed) : undefined;
-        }
-
-
-        static addFeed(url: string): IDBFeed {
-            const feed = {
-                url: url,
-                oldEntries: [],
-                subscriber: []
-            };
-            db.chain.get("feeds").unshift(feed)
-            db.write();
-            return feed;
-        }
-
-        static addSubscriber(url: string, chatid: number) {
-            const feed = this.findFeed(url);
-            if (!feed)
-                this.addFeed(url);
-            else {
-                if (feed.subscriber.some(e => e === chatid)) {
-                    return;
-                }
-            }
-            db.chain.get("feeds").find(e => e.url === url).get("subscriber").push(chatid)
-            db.write();
-        }
-
-        static findSubscribed(chatid: number) {
-            return db.chain.get("feeds").filter(e => e.subscriber.indexOf(chatid) >= 0).value();
-        }
-
-        static removeSubscriber(url: string, chatid: number) {
-            db.chain.get("feeds").find(e => e.url === url).get("subscriber").remove(e => e === chatid)
-            db.write();
-        }
-
-        static addItems(url: string, hashes: string[]) {
-            db.chain.get("feeds").find(e => e.url === url).get("oldEntries").unshift(...hashes)
-            db.write();
-        }
-
-        static getAll() {
-            return db.chain.get("feeds").map(feed => new DBFeed(feed)).value();
-        }
-    }
-
-
-    class DBFeed implements IDBFeed {
-        url: string;
-        subscriber: number[];
-        oldEntries: string[];
-
-        constructor(dbobject?: IDBFeed) {
-            if (dbobject) {
-                for (let key in dbobject)
-                    this[key] = dbobject[key];
-            }
-        }
-
-        itemExists(item: IFeedItem): boolean {
-            const hash = calculateHash(item);
-            return !!this.oldEntries.find(e => e === hash);
-        }
-
-        addItems(items: IFeedItem[]) {
-            Database.addItems(this.url, items.map(item => calculateHash(item)));
-        }
-    }
-
-
-    interface Feed {
-        title: string;
-        language: string;
-        description: string;
-        copyright: string;
-
-        items: IFeedItem[];
-    }
-
-    interface IFeedItem {
-        title: string;
-        link: string;
-        content: string,
-        contentSnippet: string;
-        guid: string;
-    }
-
-    function calculateHash(item: IFeedItem) {
-        let hash = createHash("sha512");
-        if (item.content)
-            hash.update(item.content);
-        if (item.guid)
-            hash.update(item.guid);
-        if (item.title)
-            hash.update(item.title);
-        if (item.link)
-            hash.update(item.link);
-        if (item.contentSnippet)
-            hash.update(item.contentSnippet);
-        return hash.digest("hex");
-    }
-
-    async function checkFeed(feed: DBFeed) {
-        Logging.log("Fetching:", feed.url);
-        let data = await fetch(feed.url).then(res => res.text());
-        Logging.log("Received Data");
-
-        let feedData = await parser.parseString(data).catch(err => Logging.error(err)) as Feed;
-
-        // Check for new items
-        Logging.debug(feedData.items.length, feedData.items.map(e => calculateHash(e)));
-        const newItems = feedData.items.filter(item => !feed.itemExists(item));
-
-        // Sending notifications
-        await sendFeedTelegraf(feed, newItems);
-
-        feed.addItems(newItems);
-    }
-
-
-    const bot = new Telegraf(process.env.TG_TOKEN)
-
-    bot.start(async ctx => {
-        await ctx.reply("Send some RSS Feed URLs to get started.");
-    })
-
-    bot.command("list", async (ctx) => {
-        const chatid = ctx.chat.id;
-        const feeds = Database.findSubscribed(chatid).map(feed => feed.url).join("\n");
-        await ctx.reply("You are currently subscribed to: \n" + feeds);
-    })
-
-    bot.on(message("text", "entities"), async ctx => {
-        const chatid = ctx.chat.id;
-        Logging.debug("Message From:", chatid, ctx.message);
-
-        const urls = ctx.message.entities.filter(e => e.type === "url").map(e => ctx.message.text.substr(e.offset, e.length));
-        await Promise.all(urls.map(async url => {
-            Database.addSubscriber(url, chatid);
-            await ctx.reply("Subscribed to: " + url);
-            let feed = Database.findFeed(url)
-            if (feed)
-                checkFeed(feed);
-            else
-                Logging.error("Cannot find created feed!")
-        }))
-        if (urls.length === 0)
-            await ctx.reply("No URLs found in message.");
-    })
-
-    bot.launch()
-
-    async function sendFeedTelegraf(feed: DBFeed, items: IFeedItem[]) {
-        Logging.debug("Before send", feed, items);
-        await Promise.all(feed.subscriber.map(
-            subscriber => Promise.all(
-                items.map(
-                    item => bot.telegram.sendMessage(
-                        subscriber,
-                        item.guid + "\n" + decode(item.title) + "\n\n" + decode(item.contentSnippet)
-                    ).catch(err => Logging.error(err)).then(() => Logging.debug("Message Sent"))
-                )
-            )
-        ));
-    }
-
-    function checkAll() {
-        Database.getAll().map(feed => checkFeed(feed).catch(err => Logging.error(err)).finally(() => {
-            db.write();
-        }));
-    }
-
-    setInterval(() => {
-        checkAll();
-    }, 1000 * 60 * 60);
-    checkAll();
-})

src/log.ts

@@ -0,0 +1,12 @@
+import pino from "pino";
+
+const Logging = pino({
+   transport: {
+      target: "pino-pretty",
+      options: {
+         colorize: true
+      }
+   }
+})
+
+export default Logging;

src/models/Feed.ts

@@ -0,0 +1,24 @@
+import { Entity, Unique, PrimaryGeneratedColumn, Column, ManyToMany, JoinTable, OneToMany, Relation } from "typeorm";
+import { User } from "./User.js";
+import { Post } from "./Post.js";
+
+@Entity()
+export class Feed {
+   @PrimaryGeneratedColumn()
+   id: number;
+
+   @Column()
+   url: string;
+
+   @Column({
+      default: "1970-01-01 01:00:00.000"
+   })
+   lastCheck?: Date;
+
+   @ManyToMany(() => User, user => user.feeds)
+   @JoinTable()
+   subscriber: Relation<User>[];
+
+   @OneToMany(() => Post, post => post.feed)
+   oldEntries: Relation<Post>[];
+}

src/models/Post.ts

@@ -0,0 +1,11 @@
+import { PrimaryColumn, Entity, ManyToOne, Relation } from "typeorm";
+import { Feed } from "./Feed.js";
+
+@Entity()
+export class Post {
+   @PrimaryColumn()
+   hash: string;
+
+   @ManyToOne(() => Feed, (feed) => feed.oldEntries)
+   feed: Relation<Feed>;
+}

src/models/User.ts

@@ -0,0 +1,15 @@
+import { PrimaryGeneratedColumn, ManyToMany, Relation, Entity, Column, Unique } from "typeorm"
+import { Feed } from "./Feed.js";
+
+@Entity()
+@Unique("chatid", ["chatid"])
+export class User {
+   @PrimaryGeneratedColumn()
+   id: number;
+
+   @Column()
+   chatid: number;
+
+   @ManyToMany(() => Feed, feed => feed.subscriber)
+   feeds: Relation<Feed>[];
+}

src/old_index.ts

@@ -0,0 +1,230 @@
+// require('https').globalAgent.options.ca = require('ssl-root-cas/latest').create();
+// require('ssl-root-cas').inject();
+process.env.NODE_TLS_REJECT_UNAUTHORIZED = "0";
+
+import * as _Logging from "@hibas123/nodelogging";
+import { createHash } from "crypto";
+import * as dotenv from "dotenv";
+import { decode } from "html-entities";
+
+import fetch from "node-fetch";
+import rss from "rss-parser";
+import { Telegraf } from "telegraf";
+import { message } from "telegraf/filters";
+import * as fs from "fs";
+import lodash from 'lodash'
+
+const Logging = (_Logging.default as any).default as typeof _Logging.default;
+
+Promise.resolve().then(async () => {
+    const { Low, LowSync } = await import("lowdb");
+    // @ts-ignore
+    const { JSONFileSync } = await import("lowdb/node") as any;
+
+    class LowWithLodash<T> extends LowSync<T> {
+        chain: lodash.ExpChain<this['data']> = lodash.chain(this).get('data')
+    }
+
+    dotenv.config();
+    const parser = new rss();
+    // const entities = new AllHtmlEntities();
+
+    if (!fs.existsSync("./persist")) {
+        fs.mkdirSync("./persist")
+    }
+
+    // @ts-ignore
+    const adapter = new JSONFileSync<{ feeds: IDBFeed[] }>("persist/db.json");
+    const db: any = new LowWithLodash(adapter);
+    db.read();
+
+    db.chain.defaults({ feeds: [] });
+    db.write();
+
+    interface IDBFeed {
+        url: string;
+        subscriber: number[];
+        oldEntries: string[];
+    }
+
+    class Database {
+        static findFeed(url: string): DBFeed {
+            const feed = db.chain.get("feeds").find(e => e.url === url).value();
+            return feed ? new DBFeed(feed) : undefined;
+        }
+
+
+        static addFeed(url: string): IDBFeed {
+            const feed = {
+                url: url,
+                oldEntries: [],
+                subscriber: []
+            };
+            db.chain.get("feeds").unshift(feed)
+            db.write();
+            return feed;
+        }
+
+        static addSubscriber(url: string, chatid: number) {
+            const feed = this.findFeed(url);
+            if (!feed)
+                this.addFeed(url);
+            else {
+                if (feed.subscriber.some(e => e === chatid)) {
+                    return;
+                }
+            }
+            db.chain.get("feeds").find(e => e.url === url).get("subscriber").push(chatid)
+            db.write();
+        }
+
+        static findSubscribed(chatid: number) {
+            return db.chain.get("feeds").filter(e => e.subscriber.indexOf(chatid) >= 0).value();
+        }
+
+        static removeSubscriber(url: string, chatid: number) {
+            db.chain.get("feeds").find(e => e.url === url).get("subscriber").remove(e => e === chatid)
+            db.write();
+        }
+
+        static addItems(url: string, hashes: string[]) {
+            db.chain.get("feeds").find(e => e.url === url).get("oldEntries").unshift(...hashes)
+            db.write();
+        }
+
+        static getAll() {
+            return db.chain.get("feeds").map(feed => new DBFeed(feed)).value();
+        }
+    }
+
+
+    class DBFeed implements IDBFeed {
+        url: string;
+        subscriber: number[];
+        oldEntries: string[];
+
+        constructor(dbobject?: IDBFeed) {
+            if (dbobject) {
+                for (let key in dbobject)
+                    this[key] = dbobject[key];
+            }
+        }
+
+        itemExists(item: IFeedItem): boolean {
+            const hash = calculateHash(item);
+            return !!this.oldEntries.find(e => e === hash);
+        }
+
+        addItems(items: IFeedItem[]) {
+            Database.addItems(this.url, items.map(item => calculateHash(item)));
+        }
+    }
+
+
+    interface Feed {
+        title: string;
+        language: string;
+        description: string;
+        copyright: string;
+
+        items: IFeedItem[];
+    }
+
+    interface IFeedItem {
+        title: string;
+        link: string;
+        content: string,
+        contentSnippet: string;
+        guid: string;
+    }
+
+    function calculateHash(item: IFeedItem) {
+        let hash = createHash("sha512");
+        if (item.content)
+            hash.update(item.content);
+        if (item.guid)
+            hash.update(item.guid);
+        if (item.title)
+            hash.update(item.title);
+        if (item.link)
+            hash.update(item.link);
+        if (item.contentSnippet)
+            hash.update(item.contentSnippet);
+        return hash.digest("hex");
+    }
+
+    async function checkFeed(feed: DBFeed) {
+        Logging.log("Fetching:", feed.url);
+        let data = await fetch(feed.url).then(res => res.text());
+        Logging.log("Received Data");
+
+        let feedData = await parser.parseString(data).catch(err => Logging.error(err)) as Feed;
+
+        // Check for new items
+        Logging.debug(feedData.items.length, feedData.items.map(e => calculateHash(e)));
+        const newItems = feedData.items.filter(item => !feed.itemExists(item));
+
+        // Sending notifications
+        await sendFeedTelegraf(feed, newItems);
+
+        feed.addItems(newItems);
+    }
+
+
+    const bot = new Telegraf(process.env.TG_TOKEN)
+
+    bot.start(async ctx => {
+        await ctx.reply("Send some RSS Feed URLs to get started.");
+    })
+
+    bot.command("list", async (ctx) => {
+        const chatid = ctx.chat.id;
+        const feeds = Database.findSubscribed(chatid).map(feed => feed.url).join("\n");
+        await ctx.reply("You are currently subscribed to: \n" + feeds);
+    })
+
+    bot.on(message("text", "entities"), async ctx => {
+        const chatid = ctx.chat.id;
+        Logging.debug("Message From:", chatid, ctx.message);
+
+        const urls = ctx.message.entities.filter(e => e.type === "url").map(e => ctx.message.text.substr(e.offset, e.length));
+        await Promise.all(urls.map(async url => {
+            Database.addSubscriber(url, chatid);
+            await ctx.reply("Subscribed to: " + url);
+            let feed = Database.findFeed(url)
+            if (feed)
+                checkFeed(feed);
+            else
+                Logging.error("Cannot find created feed!")
+        }))
+        if (urls.length === 0)
+            await ctx.reply("No URLs found in message.");
+    })
+
+    bot.launch()
+
+    async function sendFeedTelegraf(feed: DBFeed, items: IFeedItem[]) {
+        Logging.debug("Before send", feed, items);
+        await Promise.all(feed.subscriber.map(
+            subscriber => Promise.all(
+                items.map(
+                    item => bot.telegram.sendMessage(
+                        subscriber,
+                        item.guid + "\n" + decode(item.title) + "\n\n" + decode(item.contentSnippet)
+                    ).catch(err => Logging.error(err)).then(() => Logging.debug("Message Sent"))
+                )
+            )
+        ));
+    }
+
+    function checkAll() {
+        Database.getAll().map(feed => checkFeed(feed).catch(err => Logging.error(err)).finally(() => {
+            db.write();
+        }));
+    }
+
+    setInterval(() => {
+        checkAll();
+    }, 1000 * 60 * 60);
+    checkAll();
+})

src/telegram.ts

@@ -0,0 +1,162 @@
+import { Markup, Telegraf } from "telegraf";
+import { message } from "telegraf/filters";
+import { AppDataSource } from "./data_source.js";
+import { User } from "./models/User.js";
+import Logging from "./log.js";
+import { Feed } from "./models/Feed.js";
+
+
+const bot = new Telegraf(process.env.TG_TOKEN)
+
+function botHandler<T>(handler: (ctx: T) => Promise<any>) {
+   return async (ctx: T) => {
+      try {
+         await handler(ctx);
+      } catch (err) {
+         Logging.error(err);
+         (ctx as any).reply("An error occured while processing your request.");
+      }
+   }
+}
+
+bot.start(botHandler(async ctx => {
+   await ctx.reply("Send some RSS Feed URLs to get started.");
+}));
+
+bot.command("list", botHandler(async (ctx) => {
+
+   let user = await AppDataSource.manager.findOne(User, {
+      where: {
+         chatid: ctx.chat.id
+      },
+      relations: {
+         feeds: true,
+      }
+   })
+
+   if (!user) {
+      ctx.reply("You have no feeds yet.");
+   } else {
+      ctx.reply("You are currently subscribed to: \n" + user.feeds.map(feed => feed.url).join("\n"));
+   }
+}));
+
+bot.command("delete", botHandler(async ctx => {
+   let user = await AppDataSource.manager.findOne(User, {
+      where: {
+         chatid: ctx.chat.id
+      },
+      relations: {
+         feeds: true,
+      }
+   })
+
+   if (!user || user.feeds.length === 0) {
+      ctx.reply("You have no feeds yet.");
+   } else {
+
+      ctx.replyWithHTML("Select a feed to delete:", {
+         ...Markup.inlineKeyboard(user.feeds.map(feed => Markup.button.callback(feed.url, "delete:" + feed.id)))
+      })
+   }
+}));
+
+bot.on("callback_query", botHandler(async ctx => {
+   Logging.info("Callback Query:");
+   Logging.info(ctx.callbackQuery);
+
+   const remove_options = () => {
+      ctx.editMessageReplyMarkup({
+         inline_keyboard: []
+      })
+   }
+
+   let data = (ctx.callbackQuery as any).data;
+   if (!data) {
+      ctx.answerCbQuery("Invalid data");
+      remove_options();
+      return
+   }
+
+   let [action, id] = data.split(":");
+   if (!action || !id) {
+      ctx.answerCbQuery("Invalid data");
+      remove_options();
+      return
+   }
+
+   if (action === "delete") {
+      let user = await AppDataSource.manager.findOne(User, {
+         where: {
+            chatid: ctx.chat.id
+         },
+         relations: {
+            feeds: true,
+         }
+      });
+
+      if (user) {
+         user.feeds = user.feeds.filter(feed => feed.id !== Number(id));
+         await AppDataSource.manager.save(user);
+      }
+   } else {
+      ctx.answerCbQuery("Invalid action");
+      remove_options();
+      return
+   }
+
+   ctx.answerCbQuery("Success");
+   remove_options();
+}));
+
+bot.on(message("text", "entities"), botHandler(async ctx => {
+   let user = await AppDataSource.manager.findOne(User, {
+      where: {
+         chatid: ctx.chat.id
+      }
+   });
+
+   if (!user) {
+      user = AppDataSource.manager.create(User, {
+         chatid: ctx.chat.id,
+         feeds: [],
+      })
+
+      await AppDataSource.manager.save(user);
+   }
+
+
+   Logging.debug("Received message:", ctx.message);
+   const urls = ctx.message.entities.filter(e => e.type === "url").map(e => ctx.message.text.slice(e.offset, e.offset + e.length));
+   Logging.debug("URLs:", urls);
+
+   for (let url of urls) {
+      let normalized = new URL(url).href;
+      Logging.debug("Normalized URL:", normalized);
+
+      let feed = await AppDataSource.manager.findOne(Feed, {
+         where: {
+            url: normalized
+         },
+         relations: {
+            subscriber: true,
+         }
+      });
+
+      if (feed) {
+         feed.subscriber.push(user);
+         await AppDataSource.manager.save(feed);
+      } else {
+         feed = AppDataSource.manager.create(Feed, {
+            oldEntries: [],
+            subscriber: [user],
+            url: normalized,
+         })
+         await AppDataSource.manager.save(feed);
+      }
+   }
+
+   await ctx.reply("Added feeds.");
+}));
+
+export default bot;

tsconfig.json

@@ -8,7 +8,9 @@
     "esModuleInterop": true,
     "preserveWatchOutput": true,
     "forceConsistentCasingInFileNames": true,
-    "skipLibCheck": true
+    "skipLibCheck": true,
+    "experimentalDecorators": true,
+    "emitDecoratorMetadata": true
   },
   "include": ["./src"],
   "exclude": ["node_modules"]