From c3cc449fee89bf9ba7b4cdeca37a4fae2011a504 Mon Sep 17 00:00:00 2001
From: "NGnius (Graham)" <ngniusness@gmail.com>
Date: Fri, 10 Feb 2023 17:22:26 -0500
Subject: [PATCH] Add _unload functionality

---
 main.py | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/main.py b/main.py
index 3e7acb9..bcf1c93 100644
--- a/main.py
+++ b/main.py
@@ -11,6 +11,18 @@ class Plugin:
     # Asyncio-compatible long-running code, executed in a task when the plugin is loaded
     async def _main(self):
         # startup
+        print("PowerTools starting...")
         self.backend_proc = subprocess.Popen([PARENT_DIR + "/bin/backend"])
         while True:
             await asyncio.sleep(1)
+
+    async def _unload(self):
+        # shutdown
+        print("PowerTools unloading...")
+        if self.backend_proc is not None:
+            self.backend_proc.terminate()
+            try:
+                self.backend_proc.wait(timeout=5) # 5 seconds timeout
+            except subprocess.TimeoutExpired:
+                self.backend_proc.kill()
+            self.backend_proc = None