Init OP25 crash detection

src/op25Handler/op25Handler.mjs

@@ -3,11 +3,59 @@ const log = new DebugBuilder("client", "op25Handler");
 import { P25ConfigGenerator, NBFMConfigGenerator } from './modules/op25ConfigGenerators.mjs';
 import { getAllPresets } from '../modules/radioPresetHandler.mjs';
 import { startService, stopService } from '../modules/serviceHandler.mjs';
+import axios from 'axios'; // Import axios for HTTP requests
 
 import dotenv from 'dotenv';
-dotenv.config()
+dotenv.config();
 
 let currentSystem = undefined;
+let crashDetectionInterval; // Variable to store the crash detection interval ID
+
+/**
+ * Checks the health of the OP25 web portal by making an HTTP HEAD request.
+ * If the portal does not respond or there is an issue, retries a specified number of times.
+ * If all retry attempts fail, it restarts the OP25 service.
+ *
+ * @async
+ * @function checkServiceHealth
+ * @returns {Promise<void>} Resolves if the web portal is healthy or after the restart process is triggered.
+ * @throws Will log errors related to the health check or service restart.
+ */
+const checkServiceHealth = async () => {
+    try {
+        log.INFO("Checking OP25 web portal health...");
+        // Perform an HTTP HEAD request to the web portal with a 5-second timeout
+        await axios.head('http://localhost:8081', { timeout: 5000 });
+        log.INFO("Web portal is healthy.");
+    } catch (error) {
+        if (error.code === 'ECONNABORTED') {
+            log.ERROR("Request timed out. The web portal took too long to respond.");
+        } else if (error.response) {
+            log.ERROR(`Web portal responded with status ${error.response.status}: ${error.response.statusText}`);
+        } else if (error.request) {
+            log.ERROR("No response received from web portal.");
+        } else {
+            log.ERROR(`Unexpected error occurred: ${error.message}`);
+        }
+
+        // Retry mechanism
+        const retryAttempts = 3;
+        for (let i = 1; i <= retryAttempts; i++) {
+            log.INFO(`Retrying to check web portal health... Attempt ${i}/${retryAttempts}`);
+            try {
+                await axios.head('http://localhost:8081', { timeout: 5000 });
+                log.INFO("Web portal is healthy on retry.");
+                return;
+            } catch (retryError) {
+                log.ERROR(`Retry ${i} failed: ${retryError.message}`);
+                if (i === retryAttempts) {
+                    log.ERROR("All retry attempts failed. Restarting the service...");
+                    await restartOp25();
+                }
+            }
+        }
+    }
+};
 
 /**
  * Creates configuration based on the preset and restarts the OP25 service.
@@ -41,9 +89,7 @@ const createConfigAndRestartService = async (systemName, preset) => {
     const op25ConfigPath = `${op25FilePath}${op25FilePath.endsWith('/') ? 'active.cfg.json' : '/active.cfg.json'}`;
     await generator.exportToFile(op25ConfigPath);
 
-    // Restart the service
-    await stopService('op25-multi_rx');
-    await startService('op25-multi_rx');
+    await restartOp25();
 };
 
 /**
@@ -65,8 +111,23 @@ export const openOP25 = async (systemName) => {
     }
 
     await createConfigAndRestartService(systemName, preset);
+
+    // Start OP25 crash detection
+    if (!crashDetectionInterval) {
+        crashDetectionInterval = setInterval(checkServiceHealth, 30000); // Check every 30 seconds
+        log.INFO("Started crash detection.");
+    }
 };
 
+/**
+ * Restarts the OP25 service without changing the config.
+ * @returns {Promise<void>}
+ */
+export const restartOp25 = async () => {
+    // Restart the service
+    await stopService('op25-multi_rx');
+    await startService('op25-multi_rx');
+}
 
 /**
  * Closes the OP25 service.
@@ -75,6 +136,13 @@ export const openOP25 = async (systemName) => {
 export const closeOP25 = async () => {
     currentSystem = undefined;
     await stopService('op25-multi_rx');
+
+    // Stop crash detection
+    if (crashDetectionInterval) {
+        clearInterval(crashDetectionInterval);
+        crashDetectionInterval = null;
+        log.INFO("Stopped crash detection.");
+    }
 };
 
 /**