refactor: Modularize service management with functions

- Added run_as_su, stop_service, and start_service for better readability and reuse.
- Improved process check with /proc/${PID}.

action.sh

@@ -1,16 +1,33 @@
 #!/system/bin/sh
 
-box_dir=/data/adb/box
+# Definisi variabel
+box_dir="/data/adb/box"
 box_run="${box_dir}/run"
 box_pid="${box_run}/box.pid"
 
-if [ -f "${box_pid}" ]; then
-    echo "正在关闭服务…"
+run_as_su() {
+    su -c "$1"
+}
+
+stop_service() {
     echo "Service is shutting down"
-    su -c $box_dir/scripts/box.iptables disable && su -c $box_dir/scripts/box.service stop
+    run_as_su "${box_dir}/scripts/box.iptables disable"
+    run_as_su "${box_dir}/scripts/box.service stop"
+}
+
+start_service() {
+    echo "Service is starting, please wait for a moment"
+    run_as_su "${box_dir}/scripts/box.service start"
+    run_as_su "${box_dir}/scripts/box.iptables enable"
+}
+
+if [ -f "${box_pid}" ]; then
+    PID=$(cat "${box_pid}")
+    if [ -e "/proc/${PID}" ]; then
+        stop_service
+    else
+        start_service
+    fi
 else
-    echo "正在启动服务，请耐心等待…"
-    echo "Service is starting,please wait for a moment"
-    su -c $box_dir/scripts/box.service start && su -c $box_dir/scripts/box.iptables enable
-    exit
-fi
+    start_service
+fi