add telegram notification

server/notification.js

@@ -0,0 +1,58 @@
+const axios = require("axios");
+const {R} = require("redbean-node");
+
+class Notification {
+    static async send(notification, msg) {
+        if (notification.type === "telegram") {
+            let res = await axios.get(`https://api.telegram.org/bot${notification.telegramBotToken}/sendMessage`, {
+                params: {
+                    chat_id: notification.telegramChatID,
+                    text: msg,
+                }
+            })
+            return true;
+        } else {
+            throw new Error("Notification type is not supported")
+        }
+    }
+
+    static async save(notification, notificationID, userID) {
+        let bean
+
+        if (notificationID) {
+            bean = await R.findOne("notification", " id = ? AND user_id = ? ", [
+                notificationID,
+                userID,
+            ])
+
+            if (! bean) {
+                throw new Error("notification not found")
+            }
+
+        } else {
+            bean = R.dispense("notification")
+        }
+
+        bean.name = notification.name;
+        bean.user_id = userID;
+        bean.config = JSON.stringify(notification)
+        await R.store(bean)
+    }
+
+    static async delete(notificationID, userID) {
+        let bean = await R.findOne("notification", " id = ? AND user_id = ? ", [
+            notificationID,
+            userID,
+        ])
+
+        if (! bean) {
+            throw new Error("notification not found")
+        }
+
+        await R.trash(bean)
+    }
+}
+
+module.exports = {
+    Notification,
+}