Add gtxmessaging Notification Support (#4481)

Signed-off-by: Christoph Fichtmüller <cf@cfichtmueller.com>
Co-authored-by: Frank Elsinga <frank@elsinga.de>

server/notification-providers/gtx-messaging.js

@@ -0,0 +1,33 @@
+const NotificationProvider = require("./notification-provider");
+const axios = require("axios");
+
+class GtxMessaging extends NotificationProvider {
+    name = "gtxmessaging";
+
+    /**
+     * @inheritDoc
+     */
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+
+        // The UP/DOWN symbols will be replaced with `???` by gtx-messaging
+        const text = msg.replaceAll("🔴 ", "").replaceAll("✅ ", "");
+
+        try {
+            const data = new URLSearchParams();
+            data.append("from", notification.gtxMessagingFrom.trim());
+            data.append("to", notification.gtxMessagingTo.trim());
+            data.append("text", text);
+
+            const url = `https://rest.gtx-messaging.net/smsc/sendsms/${notification.gtxMessagingApiKey}/json`;
+
+            await axios.post(url, data);
+
+            return okMsg;
+        } catch (error) {
+            this.throwGeneralAxiosError(error);
+        }
+    }
+}
+
+module.exports = GtxMessaging;