refactor StartupCheck into class, lock if already run for multithreading

tubearchivist/home/apps.py

@@ -8,46 +8,69 @@ from home.src.ta.config import AppConfig as ArchivistConfig
 from home.src.ta.ta_redis import RedisArchivist
 
 
-def sync_redis_state():
-    """make sure redis gets new config.json values"""
-    print("sync redis")
-    config_handler = ArchivistConfig()
-    config_handler.load_new_defaults()
+class StartupCheck:
+    """checks to run at application startup"""
 
+    def __init__(self):
+        self.config_handler = ArchivistConfig()
+        self.redis_con = RedisArchivist()
+        self.has_run = self.get_has_run()
 
-def make_folders():
-    """make needed cache folders here so docker doesn't mess it up"""
-    folders = [
-        "download",
-        "channels",
-        "videos",
-        "playlists",
-        "import",
-        "backup",
-    ]
-    config = ArchivistConfig().config
-    cache_dir = config["application"]["cache_dir"]
-    for folder in folders:
-        folder_path = os.path.join(cache_dir, folder)
-        try:
-            os.makedirs(folder_path)
-        except FileExistsError:
-            continue
+    def run(self):
+        """run all startup checks"""
+        print("run startup checks")
+        self.release_lock()
+        index_check()
+        self.sync_redis_state()
+        self.make_folders()
+        self.set_has_run()
 
+    def get_has_run(self):
+        """validate if check has already executed"""
+        return self.redis_con.get_message("startup_check")
 
-def release_lock():
-    """make sure there are no leftover locks set in redis on container start"""
-    all_locks = [
-        "manual_import",
-        "downloading",
-        "dl_queue",
-        "dl_queue_id",
-        "rescan",
-    ]
-    for lock in all_locks:
-        response = RedisArchivist().del_message(lock)
-        if response:
-            print("deleted leftover key from redis: " + lock)
+    def set_has_run(self):
+        """startup checks run"""
+        message = {"status": True}
+        self.redis_con.set_message("startup_check", message, expire=120)
+
+    def sync_redis_state(self):
+        """make sure redis gets new config.json values"""
+        print("sync redis")
+        self.config_handler.load_new_defaults()
+
+    def make_folders(self):
+        """make needed cache folders here so docker doesn't mess it up"""
+        folders = [
+            "download",
+            "channels",
+            "videos",
+            "playlists",
+            "import",
+            "backup",
+        ]
+        cache_dir = self.config_handler.config["application"]["cache_dir"]
+        for folder in folders:
+            folder_path = os.path.join(cache_dir, folder)
+            try:
+                os.makedirs(folder_path)
+            except FileExistsError:
+                continue
+
+    def release_lock(self):
+        """make sure there are no leftover locks set in redis"""
+        all_locks = [
+            "startup_check",
+            "manual_import",
+            "downloading",
+            "dl_queue",
+            "dl_queue_id",
+            "rescan",
+        ]
+        for lock in all_locks:
+            response = self.redis_con.del_message(lock)
+            if response:
+                print("deleted leftover key from redis: " + lock)
 
 
 class HomeConfig(AppConfig):
@@ -57,7 +80,9 @@ class HomeConfig(AppConfig):
     name = "home"
 
     def ready(self):
-        release_lock()
-        index_check()
-        sync_redis_state()
-        make_folders()
+        startup = StartupCheck()
+        if startup.has_run["status"]:
+            print("startup checks run in other thread")
+            return
+
+        startup.run()