Finalizing #9

- Added service handler for system services
- Control OP25 from service handler
- Generate and save OP25 config file
- Handlers for OP25

client/modules/serviceHandler.mjs

@@ -0,0 +1,52 @@
+import { exec } from 'child_process';
+
+/**
+ * Starts the given service from the command line.
+ * @param {string} serviceName The service name to be started. Ex: ... start "{serviceName}.service"
+ * @returns {Promise<void>}
+ */
+export const startService = async (serviceName) => {
+    return new Promise((resolve, reject) => {
+        exec(`sudo systemctl start ${serviceName}.service`, (error, stdout, stderr) => {
+            if (error) {
+                reject(error);
+            } else {
+                resolve();
+            }
+        });
+    });
+};
+
+/**
+ * Restarts the given service from the command line.
+ * @param {string} serviceName The service name to be restarted. Ex: ... restart "{serviceName}.service"
+ * @returns {Promise<void>}
+ */
+export const restartService = async (serviceName) => {
+    return new Promise((resolve, reject) => {
+        exec(`sudo systemctl restart ${serviceName}.service`, (error, stdout, stderr) => {
+            if (error) {
+                reject(error);
+            } else {
+                resolve();
+            }
+        });
+    });
+};
+
+/**
+ * Stops the given service from the command line.
+ * @param {string} serviceName The service name to be stopped. Ex: ... stop "{serviceName}.service"
+ * @returns {Promise<void>}
+ */
+export const stopService = async (serviceName) => {
+    return new Promise((resolve, reject) => {
+        exec(`sudo systemctl stop ${serviceName}.service`, (error, stdout, stderr) => {
+            if (error) {
+                reject(error);
+            } else {
+                resolve();
+            }
+        });
+    });
+};