Cellsynt mobile services (#4625)

Co-authored-by: Frank Elsinga <frank@elsinga.de>

server/notification-providers/cellsynt.js

@@ -0,0 +1,39 @@
+const NotificationProvider = require("./notification-provider");
+const axios = require("axios");
+
+class Cellsynt extends NotificationProvider {
+    name = "Cellsynt";
+
+    /**
+     * @inheritdoc
+     */
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        const okMsg = "Sent Successfully.";
+        const data = {
+            // docs at https://www.cellsynt.com/en/sms/api-integration
+            params: {
+                "username": notification.cellsyntLogin,
+                "password": notification.cellsyntPassword,
+                "destination": notification.cellsyntDestination,
+                "text": msg.replace(/[^\x00-\x7F]/g, ""),
+                "originatortype": notification.cellsyntOriginatortype,
+                "originator": notification.cellsyntOriginator,
+                "allowconcat": notification.cellsyntAllowLongSMS ? 6 : 1
+            }
+        };
+        try {
+            const resp = await axios.post("https://se-1.cellsynt.net/sms.php", null, data);
+            if (resp.data == null ) {
+                throw new Error("Could not connect to Cellsynt, please try again.");
+            } else if (resp.data.includes("Error:")) {
+                resp.data = resp.data.replaceAll("Error:", "");
+                throw new Error(resp.data);
+            }
+            return okMsg;
+        } catch (error) {
+            this.throwGeneralAxiosError(error);
+        }
+    }
+}
+
+module.exports = Cellsynt;