From 9a4a4a2f08e1bc9c16432eac84f6a155d27c4922 Mon Sep 17 00:00:00 2001
From: minie4 <minie4@gmx.de>
Date: Fri, 23 Jun 2023 18:56:59 +0200
Subject: [PATCH] =?UTF-8?q?=F0=9F=8E=89=20Mostly=20working=20matrix=20bot?=
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8
Content-Transfer-Encoding: 8bit

(timetable group handling missing)
---
 .gitignore        |   3 +
 index.js          | 280 +++++++++++++++++++++++++++
 package-lock.json | 469 ++++++++++++++++++++++++++++++++++++++++++++++
 package.json      |  18 ++
 timetable.js      |  74 ++++++++
 5 files changed, 844 insertions(+)
 create mode 100644 .gitignore
 create mode 100644 index.js
 create mode 100644 package-lock.json
 create mode 100644 package.json
 create mode 100644 timetable.js

diff --git a/.gitignore b/.gitignore
new file mode 100644
index 0000000..7439756
--- /dev/null
+++ b/.gitignore
@@ -0,0 +1,3 @@
+node_modules/
+.env
+data.json
\ No newline at end of file
diff --git a/index.js b/index.js
new file mode 100644
index 0000000..01af3f3
--- /dev/null
+++ b/index.js
@@ -0,0 +1,280 @@
+import * as sdk from "matrix-js-sdk";
+import fetch from "node-fetch";
+import "dotenv/config";
+import { JsonDB, Config } from "node-json-db";
+import { TimetableClient } from "./timetable.js";
+
+const db = new JsonDB(new Config("data", true, true, "/"));
+const timetable = new TimetableClient(
+  process.env.TIMETABLE_ENDPOINT,
+  process.env.TIMETABLE_TOKEN
+);
+
+await db.push("/rooms", {}, false);
+
+// Login
+const userId = process.env.MATRIX_USER;
+const client = sdk.createClient({
+  baseUrl: process.env.MATRIX_URL,
+  accessToken: process.env.MATRIX_TOKEN,
+  userId: userId,
+  fetchFn: fetch,
+});
+
+client.once("sync", function (state) {
+  if (state === "PREPARED") {
+    console.log("sync finished");
+  }
+});
+
+// Auto-join invited rooms
+client.on("RoomMember.membership", function (_, member) {
+  if (member.membership === "invite" && member.userId === userId) {
+    client
+      .joinRoom(member.roomId)
+      .then(function () {
+        console.log("Auto-joined %s", member.roomId);
+      })
+      .catch(() => {
+        client.leave(member.roomId);
+      });
+  }
+});
+
+function formatUpdateMessage(update) {
+  let message = "";
+  if (update.type == "addition") message += "🆕";
+  else if (update.type == "deletion") message += "🗑";
+  else if (update.type == "change") message += "✏";
+
+  if (update.type == "addition" || update.type == "deletion") {
+    message += " ";
+    if (update.change.type == "cancellation") message += "🚫";
+    else message += "📑";
+  }
+  message += ` <b>${update.lesson}th Lesson</b><br><ul>\n`;
+
+  if (update.type == "addition" || update.type == "deletion") {
+    message += `\n<li><b>Subject:</b> ${
+      update.change.change.subject || "Unknown"
+    }`;
+    if (update.change.change.teacher) {
+      message += `</li>\n<li><b>Teacher:</b> <del>${
+        update.change.teacher || "Unknown"
+      }</del> ${update.change.change.teacher}`;
+    } else {
+      message += `</li>\n<li><b>Teacher:</b> ${
+        update.change.teacher || "Unknown"
+      }`;
+    }
+    message += `</li>\n<li><b>Room:</b> ${
+      update.change.change.room || "Unknown"
+    }`;
+    if (update.change.notes) {
+      message += `</li>\n<li><b>Notes:</b></li>\n${update.change.notes}`;
+    }
+  } else {
+    for (const change of Object.keys(update.change)) {
+      const changeValue = update.change[change];
+      message += `<br>\n${
+        change.charAt(0).toUpperCase() + change.slice(1)
+      }: <del>${changeValue.before}</del> ${changeValue.after}`;
+    }
+  }
+
+  return message;
+}
+
+// Check for timetable updates
+setTimeout(async () => {
+  const history = await timetable.getUpdates();
+  const lastCheck = await db.getObjectDefault("/lastTimetableUpdate", 0);
+  const updates = history.filter((entry) => entry.updatedAt > lastCheck);
+
+  await db.push("/lastTimetableUpdate", new Date().getTime());
+
+  const rooms = await db.getData("/rooms");
+  for (const update of updates) {
+    for (const roomId of Object.keys(rooms)) {
+      const room = rooms[roomId];
+      if (!update.class.includes(room.filter)) continue;
+      console.log(update);
+
+      let message = formatUpdateMessage(update);
+      client.sendHtmlMessage(roomId, plainText(message), message);
+    }
+  }
+}, 1000);
+
+// Handle events
+client.on("Room.timeline", async function (event, room) {
+  if (event.getLocalAge() > 5000) return;
+  if (event.event.sender == userId) return;
+  try {
+    if (event.getType() === "m.room.message") {
+      await handleMessage(event, room.roomId);
+    } else if (
+      event.getType() === "m.reaction" ||
+      event.getType() === "m.room.redaction"
+    ) {
+      await handleReaction(event, room.roomId);
+    }
+  } catch (e) {
+    client.sendTextMessage(
+      room.roomId,
+      "⛔ Your command failed executing! Please try again"
+    );
+  }
+});
+
+function plainText(message) {
+  return message.replace("<li>", "- ").replace(/<[^>]+>/g, "");
+}
+
+function sendReaction(room, toEvent, text) {
+  client.sendEvent(room, "m.reaction", {
+    "m.relates_to": {
+      rel_type: "m.annotation",
+      event_id: toEvent,
+      key: text,
+    },
+  });
+}
+
+async function handleMessage(event, room) {
+  const body = event.event.content.body;
+  const sender = event.event.sender;
+
+  const userState = await db.getObjectDefault(`/rooms/${room}/state`);
+
+  if (!userState) {
+    if (body == "help") {
+      // Send help message
+      const helpMessage = `<b>Available commands</b>:<ul>
+<li> <code>help</code>: List available commands </li>
+<li> <code>info</code>: Get information about the current room's configuration </li>
+<li> <code>filter [class (eg. 10c)]</code>: Set the class to filter for. Use only filter available in the timetable v2 app.</li>
+<li> <code>timetable</code>: Set your timetable</li>
+<li> <code>groups</code>: Configure your timetable groups</li>
+<li> <code>reset</code>: Reset the configuration for this room</li>
+`;
+      client.sendHtmlMessage(room, plainText(helpMessage), helpMessage);
+    } else if (body == "info") {
+      // Send room information
+      const roomData = await db.getObjectDefault(`/rooms/${room}`);
+      if (!roomData) {
+        client.sendTextMessage(
+          room,
+          "⛔ This room has no configuration data yet"
+        );
+        return;
+      }
+      const response = `<b>Current Room Configuration</b>:
+<br>Filter: <code>${roomData.filter || "None"}</code>
+<br>Timetable ID: <code>${roomData.timetable || "Not set"}</code>
+<br>Timetable Groups: <code>${(roomData.groups || []).join(", ")}</code>`;
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else if (body.startsWith("filter ")) {
+      // Set filtering
+      const filter = body.split(" ")[1].toLowerCase();
+      const response = `👍 Now filtering for <code>${filter}</code>`;
+      await db.push(`/rooms/${room}/filter`, filter);
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else if (body == "timetable") {
+      // Timetable
+      if (!(await db.getObjectDefault(`/rooms/${room}/filter`))) {
+        client.sendTextMessage(room, "⛔ You need to configure a filter first");
+        return;
+      }
+      // Query timetables
+      const timetables = await timetable.getTimetables(
+        await db.getData(`/rooms/${room}/filter`)
+      );
+      await db.push(`/rooms/${room}/state`, "timetable");
+      let response = `🛠 Which timetable do you want to use?<ul>\n`;
+      // Build response message
+      for (const timetable of timetables.timetables) {
+        response += `<li><code>${timetable.id}</code>: ${timetable.title}</li>\n`;
+      }
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else if (body == "groups") {
+      if (!(await db.getObjectDefault(`/rooms/${room}/timetable`))) {
+        client.sendTextMessage(room, "⛔ You need to select a timetable first");
+        return;
+      }
+      // Timetable groups
+      await db.push(`/rooms/${room}/state`, "groups");
+      await db.push(`/rooms/${room}/stateData/sender`, event.sender.userId);
+      const groups = await timetable.getGroups(
+        await db.getData(`/rooms/${room}/filter`),
+        await db.getData(`/rooms/${room}/timetable`)
+      );
+      let response = `🛠 Set your timetable groups by reacting with the correct group. React with ✅ to confirm your selection.<ul>`;
+      const message = await client.sendHtmlMessage(
+        room,
+        plainText(response),
+        response
+      );
+      for (const group of groups) {
+        sendReaction(room, message.event_id, group);
+      }
+      sendReaction(room, message.event_id, "✅");
+    } else if (body == "reset") {
+      // Reset room
+      await db.delete(`/rooms/${room}`);
+      const response = "⚠ The configuration for this room was reset!";
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else {
+      const response =
+        "Unknown command! Type <code>help</code> for a list of valid commands";
+      client.sendHtmlMessage(room, plainText(response), response);
+    }
+  } else {
+    // If user is in setup mode
+    if (body == "abort") {
+      await db.delete(`/rooms/${room}/state`);
+      const response = `❌ Aborted current action`;
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else if (userState == "timetable") {
+      const timetable = parseInt(body);
+      if (!timetable) {
+        client.sendTextMessage(room, "Please enter the timetable id!");
+        return;
+      }
+      await db.push(`/rooms/${room}/timetable`, timetable);
+      await db.delete(`/rooms/${room}/state`);
+      const response = `✅ Now using timetable <code>${timetable}</code>`;
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else {
+      const response =
+        "⚠ You are currently in setup mode. Complete the setup or type <code>abort</code> to execute other commands.";
+      client.sendHtmlMessage(room, plainText(response), response);
+    }
+  }
+}
+
+async function handleReaction(event, room) {
+  const state = await db.getObjectDefault(`/rooms/${room}/state`);
+  if (state == "groups") {
+    const stateData = await db.getData(`/rooms/${room}/stateData`);
+    if (event.sender.userId != stateData.sender) return;
+    if (event.event.content["m.relates_to"].key == "✅") {
+      await db.push(`/rooms/${room}/groups`, Object.values(stateData.groups));
+      await db.delete(`/rooms/${room}/stateData`);
+      await db.delete(`/rooms/${room}/state`);
+      const response = `✅ Now using timetable groups <code>${Object.values(
+        stateData.groups
+      ).join(", ")}</code>`;
+      client.sendHtmlMessage(room, plainText(response), response);
+    } else if (event.getType() === "m.reaction") {
+      await db.push(
+        `/rooms/${room}/stateData/groups/${event.event.event_id}`,
+        event.event.content["m.relates_to"].key
+      );
+    } else {
+      await db.delete(`/rooms/${room}/stateData/groups/${event.event.redacts}`);
+    }
+  }
+}
+
+client.startClient(0);
diff --git a/package-lock.json b/package-lock.json
new file mode 100644
index 0000000..664a27c
--- /dev/null
+++ b/package-lock.json
@@ -0,0 +1,469 @@
+{
+  "name": "timetable-v2-notify",
+  "version": "1.0.0",
+  "lockfileVersion": 2,
+  "requires": true,
+  "packages": {
+    "": {
+      "name": "timetable-v2-notify",
+      "version": "1.0.0",
+      "license": "MIT",
+      "dependencies": {
+        "dotenv": "^16.3.1",
+        "matrix-js-sdk": "^26.1.0",
+        "node-fetch": "^3.3.1",
+        "node-json-db": "^2.2.0"
+      }
+    },
+    "node_modules/@babel/runtime": {
+      "version": "7.22.5",
+      "resolved": "https://registry.npmjs.org/@babel/runtime/-/runtime-7.22.5.tgz",
+      "integrity": "sha512-ecjvYlnAaZ/KVneE/OdKYBYfgXV3Ptu6zQWmgEF7vwKhQnvVS6bjMD2XYgj+SNvQ1GfK/pjgokfPkC/2CO8CuA==",
+      "dependencies": {
+        "regenerator-runtime": "^0.13.11"
+      },
+      "engines": {
+        "node": ">=6.9.0"
+      }
+    },
+    "node_modules/@matrix-org/matrix-sdk-crypto-js": {
+      "version": "0.1.0-alpha.11",
+      "resolved": "https://registry.npmjs.org/@matrix-org/matrix-sdk-crypto-js/-/matrix-sdk-crypto-js-0.1.0-alpha.11.tgz",
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+    "node_modules/@types/retry": {
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+        "node": ">=0.8.x"
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+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "paypal",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "dependencies": {
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+        "web-streams-polyfill": "^3.0.3"
+      },
+      "engines": {
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+    "node_modules/matrix-events-sdk": {
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+      "dependencies": {
+        "@babel/runtime": "^7.12.5",
+        "@matrix-org/matrix-sdk-crypto-js": "^0.1.0-alpha.10",
+        "another-json": "^0.2.0",
+        "bs58": "^5.0.0",
+        "content-type": "^1.0.4",
+        "loglevel": "^1.7.1",
+        "matrix-events-sdk": "0.0.1",
+        "matrix-widget-api": "^1.3.1",
+        "p-retry": "4",
+        "sdp-transform": "^2.14.1",
+        "unhomoglyph": "^1.0.6",
+        "uuid": "9"
+      },
+      "engines": {
+        "node": ">=16.0.0"
+      }
+    },
+    "node_modules/matrix-widget-api": {
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+      "dependencies": {
+        "@types/events": "^3.0.0",
+        "events": "^3.2.0"
+      }
+    },
+    "node_modules/node-domexception": {
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+      "funding": [
+        {
+          "type": "github",
+          "url": "https://github.com/sponsors/jimmywarting"
+        },
+        {
+          "type": "github",
+          "url": "https://paypal.me/jimmywarting"
+        }
+      ],
+      "engines": {
+        "node": ">=10.5.0"
+      }
+    },
+    "node_modules/node-fetch": {
+      "version": "3.3.1",
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+}
diff --git a/package.json b/package.json
new file mode 100644
index 0000000..5fa27c2
--- /dev/null
+++ b/package.json
@@ -0,0 +1,18 @@
+{
+  "name": "timetable-v2-notify",
+  "type": "module",
+  "version": "1.0.0",
+  "description": "",
+  "main": "index.js",
+  "scripts": {
+    "test": "echo \"Error: no test specified\" && exit 1"
+  },
+  "author": "minie4",
+  "license": "MIT",
+  "dependencies": {
+    "dotenv": "^16.3.1",
+    "matrix-js-sdk": "^26.1.0",
+    "node-fetch": "^3.3.1",
+    "node-json-db": "^2.2.0"
+  }
+}
diff --git a/timetable.js b/timetable.js
new file mode 100644
index 0000000..9c025e5
--- /dev/null
+++ b/timetable.js
@@ -0,0 +1,74 @@
+import fetch from "node-fetch";
+
+export class TimetableClient {
+  constructor(apiEndpoint, token) {
+    this.apiEndpoint = apiEndpoint;
+    this.token = token;
+  }
+  login(password) {
+    fetch(
+      this.apiEndpoint + `/token?password=${encodeURIComponent(password)}`,
+      { method: "post" }
+    )
+      .then((e) => {
+        if (e.status == 401) {
+          console.warn("Invalid Timetable V2 password!");
+          return;
+        } else if (e.status != 200) {
+          console.log("Failed requesting Timetable V2 API-Token!");
+          return;
+        }
+        return e.json();
+      })
+      .then((token) => (this.token = token.token));
+  }
+  getTimetables(forClass) {
+    return new Promise((resolve, reject) => {
+      fetch(
+        this.apiEndpoint +
+          `/timetable?token=${encodeURIComponent(
+            this.token
+          )}&class=${encodeURIComponent(forClass)}`
+      )
+        .then((e) => {
+          if (e.status != 200) reject();
+          else return e.json();
+        })
+        .then((timetables) => resolve(timetables));
+    });
+  }
+  async getGroups(timetableClass, timetableId) {
+    const timetables = await fetch(
+      this.apiEndpoint +
+        `/timetable?token=${encodeURIComponent(
+          this.token
+        )}&class=${encodeURIComponent(timetableClass)}`
+    );
+    const timetable = (await timetables.json()).timetables.find(
+      (e) => e.id == timetableId
+    );
+
+    const foundTimetableGroups = [];
+    if (!timetable.data) return [];
+    // Make a list of all possible timetable groups
+    // found in the current timetable
+    for (const day of timetable.data) {
+      for (const lesson of day) {
+        if (Array.isArray(lesson) && lesson.length > 1) {
+          for (const group of lesson) {
+            if (group.group && !foundTimetableGroups.includes(group.group)) {
+              foundTimetableGroups.push(group.group);
+            }
+          }
+        }
+      }
+    }
+    return foundTimetableGroups;
+  }
+  async getUpdates() {
+    const history = await fetch(
+      this.apiEndpoint + "/history" + `?token=${encodeURIComponent(this.token)}`
+    );
+    return await history.json();
+  }
+}