fix: Prevent Multiple App Reloads | closes #12

Implemented a slower but more robust method for detecting file changes. Before triggering an app reload, the new approach verifies whether the file content has actually changed. This resolves the issue discussed in #12, where unnecessary reloads were occurring.

tkreload/app_event_handler.py

@@ -2,12 +2,41 @@
 
 class AppFileEventHandler(FileSystemEventHandler):
     """Handles file changes to trigger app reload."""
-
     def __init__(self, callback, app_file, auto_reload_manager):
         self.callback = callback
         self.app_file = app_file
         self.auto_reload_manager = auto_reload_manager
+        self.last_content = None
 
     def on_modified(self, event):
+        """
+        Called when a file is modified.
+
+        This method checks if the modified file is the one being monitored
+        and if the auto-reload manager is active. If the content of the file
+        has changed, it triggers the provided callback function.
+
+        Args:
+            event: The event object containing information about the file modification.
+        """
         if event.src_path.endswith(self.app_file) and self.auto_reload_manager.get_status():
-            self.callback()
+            current_content = self.read_file_content(self.app_file)
+            if current_content != self.last_content:
+                self.last_content = current_content
+                self.callback()
+
+    def read_file_content(self, file_path):
+        """
+        Reads the content of a file.
+
+        This method opens the specified file in read mode and returns its content
+        as a string.
+
+        Args:
+            file_path (str): The path to the file to be read.
+
+        Returns:
+            str: The content of the file.
+        """
+        with open(file_path, 'r') as file:
+            return file.read()