implement google chat notification type

server/notification-providers/google-chat.js

@@ -0,0 +1,46 @@
+const NotificationProvider = require("./notification-provider");
+const axios = require("axios");
+const { setting } = require("../util-server");
+const { getMonitorRelativeURL } = require("../../src/util");
+
+class GoogleChat extends NotificationProvider {
+
+    name = "Google Chat";
+
+    async send(notification, msg, monitorJSON = null, heartbeatJSON = null) {
+        let okMsg = "Sent Successfully.";
+        try {
+            // Google Chat message formatting: https://developers.google.com/chat/api/guides/message-formats/basic
+
+            let textMsg = ''
+            if (heartbeatJSON && heartbeatJSON.status === UP) {
+                textMsg = `✅ Application is back online`;
+            } else {
+                textMsg = `🔴 Application went down`;
+            }
+
+            if (monitorJSON && monitorJSON.name) {
+                textMsg += `\n*${monitorJSON.name}*`;
+            }
+
+            textMsg += `\n${msg}`;
+
+            const baseURL = await setting("primaryBaseURL");
+            if (baseURL) {
+                textMsg += `\n${baseURL + getMonitorRelativeURL(monitorJSON.id)}`;
+            }
+
+            const data = {
+                "text": textMsg,
+            };
+
+            await axios.post(notification.googleChatWebhookURL, data);
+            return okMsg;
+        } catch (error) {
+            this.throwGeneralAxiosError(error);
+        }
+
+    }
+}
+
+module.exports = GoogleChat;