Convert into MVC and optimize the code

app/Controllers/activity_controller.py

@@ -0,0 +1,64 @@
+import os
+from flask import request, render_template, current_app
+from datetime import datetime
+
+
+def activity_log_controller():
+    logs = []
+    log_file = os.path.join(current_app.root_path, 'activity.log')
+
+    if os.path.exists(log_file):
+        with open(log_file, 'r') as f:
+            for line in f:
+                parts = line.strip().split(" | ")
+                if len(parts) == 4:
+                    logs.append({
+                        "timestamp": parts[0].replace("Timestamp:", "").strip(),
+                        "user": parts[1].replace("User:", "").strip(),
+                        "action": parts[2].replace("Action:", "").strip(),
+                        "details": parts[3].replace("Details:", "").strip()
+                    })
+
+    # Filters
+    start_date = request.args.get("start_date")
+    end_date = request.args.get("end_date")
+    username = request.args.get("username")
+
+    filtered_logs = logs
+
+    # Date filter
+    if start_date or end_date:
+        try:
+            if start_date:
+                start_dt = datetime.strptime(start_date, "%Y-%m-%d")
+            else:
+                start_dt = datetime.min
+
+            if end_date:
+                end_dt = datetime.strptime(end_date, "%Y-%m-%d")
+            else:
+                end_dt = datetime.max
+
+            filtered_logs = [
+                log for log in filtered_logs
+                if start_dt <= datetime.strptime(
+                    log["timestamp"], "%Y-%m-%d %H:%M:%S"
+                ) <= end_dt.replace(hour=23, minute=59, second=59)
+            ]
+        except Exception as e:
+            print("Date filter error:", e)
+
+    # Username filter
+    if username:
+        filtered_logs = [
+            log for log in filtered_logs
+            if log["user"].lower() == username.lower()
+        ]
+
+    return render_template(
+        "activity_log.html",
+        logs=filtered_logs,
+        start_date=start_date,
+        end_date=end_date,
+        username=username
+    )