Update backend models, controllers, and session

dev.py

@@ -6,28 +6,48 @@ import sys
 
 print(sys.argv)
 
-port = sys.argv[1]
+# Extract port (first arg if it's not a command)
+commands = ["src", "lib", "ls", "reset", "follow", "db"]
+port = None
+if len(sys.argv) > 1 and sys.argv[1] not in commands:
+    port = sys.argv[1]
 
-cmd = sys.argv[1]
 
 for cmd in sys.argv[1:]:
     print(cmd)
     match cmd:
         case "src":
-            subprocess.call(["mpremote", "connect", port, "fs", "cp", "-r", ".", ":" ], cwd="src")
+            if port:
+                subprocess.call(["mpremote", "connect", port, "fs", "cp", "-r", ".", ":" ], cwd="src")
+            else:
+                print("Error: Port required for 'src' command")
         case "lib":
-            subprocess.call(["mpremote", "connect", port, "fs", "cp", "-r", "lib", ":" ])
+            if port:
+                subprocess.call(["mpremote", "connect", port, "fs", "cp", "-r", "lib", ":" ])
+            else:
+                print("Error: Port required for 'lib' command")
         case "ls":
-            subprocess.call(["mpremote", "connect", port, "fs", "ls", ":" ])
+            if port:
+                subprocess.call(["mpremote", "connect", port, "fs", "ls", ":" ])
+            else:
+                print("Error: Port required for 'ls' command")
         case "reset":
-            with serial.Serial(port, baudrate=115200) as ser:
-                ser.write(b'\x03\x03\x04')
+            if port:
+                with serial.Serial(port, baudrate=115200) as ser:
+                    ser.write(b'\x03\x03\x04')
+            else:
+                print("Error: Port required for 'reset' command")
         case "follow":
-            with serial.Serial(port, baudrate=115200) as ser:
-                while True:
-                    if ser.in_waiting > 0:  # Check if there is data in the buffer
-                        data = ser.readline().decode('utf-8').strip()  # Read and decode the data
-                        print(data)
-
-
-
+            if port:
+                with serial.Serial(port, baudrate=115200) as ser:
+                    while True:
+                        if ser.in_waiting > 0:  # Check if there is data in the buffer
+                            data = ser.readline().decode('utf-8').strip()  # Read and decode the data
+                            print(data)
+            else:
+                print("Error: Port required for 'follow' command")
+        case "db":
+            if port:
+                subprocess.call(["mpremote", "connect", port, "fs", "cp", "-r", "db", ":" ])
+            else:
+                print("Error: Port required for 'db' command")