Add USB card reader authentication for edit feature

- Implemented CardReader class to read data from USB card readers
- Added CardSwipePopup with 5-second timeout and visual feedback
- Card data is captured and included in edit metadata
- Card data sent to server when edited images are uploaded
- Added evdev dependency for USB input device handling
- Fallback mode when evdev not available (for development)
- Created test utility (test_card_reader.py) for card reader testing
- Added comprehensive documentation (CARD_READER_AUTHENTICATION.md)
- Added access-card.png icon for authentication popup
- Edit interface requires card swipe or times out after 5 seconds

working_files/test_card_reader.py

@@ -0,0 +1,114 @@
+#!/usr/bin/env python3
+"""
+Test script for USB card reader functionality
+"""
+
+import evdev
+from evdev import InputDevice, categorize, ecodes
+import time
+
+def list_input_devices():
+    """List all available input devices"""
+    print("\n=== Available Input Devices ===")
+    devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
+    
+    for i, device in enumerate(devices):
+        print(f"\n[{i}] {device.path}")
+        print(f"    Name: {device.name}")
+        print(f"    Phys: {device.phys}")
+        capabilities = device.capabilities()
+        if ecodes.EV_KEY in capabilities:
+            print(f"    Type: Keyboard/HID Input Device")
+    
+    return devices
+
+def test_card_reader(device_index=None):
+    """Test reading from a card reader device"""
+    devices = [evdev.InputDevice(path) for path in evdev.list_devices()]
+    
+    if device_index is not None:
+        if device_index >= len(devices):
+            print(f"Error: Device index {device_index} out of range")
+            return
+        device = devices[device_index]
+    else:
+        # Try to find a card reader automatically
+        device = None
+        for dev in devices:
+            if 'keyboard' in dev.name.lower() or 'card' in dev.name.lower() or 'reader' in dev.name.lower():
+                device = dev
+                print(f"Found potential card reader: {dev.name}")
+                break
+        
+        if not device and devices:
+            # Use first keyboard device
+            for dev in devices:
+                capabilities = dev.capabilities()
+                if ecodes.EV_KEY in capabilities:
+                    device = dev
+                    print(f"Using keyboard device: {dev.name}")
+                    break
+        
+        if not device:
+            print("No suitable input device found!")
+            return
+    
+    print(f"\n=== Testing Card Reader ===")
+    print(f"Device: {device.name}")
+    print(f"Path: {device.path}")
+    print("\nSwipe your card now (press Ctrl+C to exit)...\n")
+    
+    card_data = ""
+    
+    try:
+        for event in device.read_loop():
+            if event.type == ecodes.EV_KEY:
+                key_event = categorize(event)
+                
+                if key_event.keystate == 1:  # Key down
+                    key_code = key_event.keycode
+                    
+                    # Handle Enter key (card read complete)
+                    if key_code == 'KEY_ENTER':
+                        print(f"\n✓ Card data received: '{card_data}'")
+                        print(f"  Length: {len(card_data)} characters")
+                        print(f"  Processed ID: card_{card_data.strip().upper()}")
+                        print("\nReady for next card swipe...")
+                        card_data = ""
+                    
+                    # Build card data string
+                    elif key_code.startswith('KEY_'):
+                        char = key_code.replace('KEY_', '')
+                        if len(char) == 1:  # Single character
+                            card_data += char
+                            print(f"Reading: {card_data}", end='\r', flush=True)
+                        elif char.isdigit():  # Handle numeric keys
+                            card_data += char
+                            print(f"Reading: {card_data}", end='\r', flush=True)
+                            
+    except KeyboardInterrupt:
+        print("\n\nTest stopped by user")
+    except Exception as e:
+        print(f"\nError: {e}")
+
+if __name__ == "__main__":
+    print("USB Card Reader Test Tool")
+    print("=" * 50)
+    
+    devices = list_input_devices()
+    
+    if not devices:
+        print("\nNo input devices found!")
+        exit(1)
+    
+    print("\n" + "=" * 50)
+    choice = input("\nEnter device number to test (or press Enter for auto-detect): ").strip()
+    
+    if choice:
+        try:
+            device_index = int(choice)
+            test_card_reader(device_index)
+        except ValueError:
+            print("Invalid device number!")
+    else:
+        test_card_reader()