Initial version: TUI and math homework

print_server.py

@@ -0,0 +1,105 @@
+import random
+from datetime import datetime
+from escpos.printer import Usb, Dummy
+from escpos.exceptions import USBNotFoundError
+
+# ==========================================
+# CONFIGURATION
+# ==========================================
+# Replace these with your specific printer's values found via lsusb or Device Manager
+# Example: 0x04b8 is Epson.
+USB_VENDOR_ID = 0x0525  
+USB_PRODUCT_ID = 0xa700
+INPUT_ENDPOINT = 0x81
+OUTPUT_ENDPOINT = 0x01
+
+# Set to True to print to console instead of physical printer (for testing)
+USE_DUMMY_PRINTER = False 
+
+def get_printer():
+    """
+    Initializes the printer connection.
+    Returns a printer object.
+    """
+    if USE_DUMMY_PRINTER:
+        return Dummy()
+    
+    try:
+        # Initialize USB printer
+        # profile="TM-T88V" is a generic profile, works for many ESC/POS printers
+        p = Usb(USB_VENDOR_ID, USB_PRODUCT_ID, 0, INPUT_ENDPOINT, OUTPUT_ENDPOINT, profile="TM-T88V")
+        return p
+    except USBNotFoundError:
+        print("Error: Printer not found. Check USB connection and IDs.")
+        return None
+    except Exception as e:
+        print(f"Error initializing printer: {e}")
+        return None
+
+def generate_homework_job(p):
+    """
+    Sends ESC/POS commands to the printer to print the homework.
+    """
+    # 1. Header (Center aligned, Double Height/Width)
+    p.set(align='center', height=2, width=2, bold=True)
+    p.text("MALA NASOBILKA\n")
+    p.text("-------------\n")
+    
+    # Reset text formatting for body
+    p.set(align='left', height=1, width=1, bold=False)
+    today = datetime.now().strftime("%d.%m.%Y")
+    p.text(f"Datum: {today}\n\n")
+
+    # 2. Generate and Print Equations
+    p.text("Vypocitej:\n\n")
+    
+    for i in range(1, 11):
+        num1 = random.randint(2, 12)
+        num2 = random.randint(2, 12)
+        
+        # Format: "1)  5 x 4 = ____"
+        line = f"{i}) {num1} * {num2} = ____\n"
+        p.text(line)
+        p.text("\n") # Extra spacing for writing
+
+    p.text("Hodne stesti!\n")
+
+    # 4. Cut Paper
+    p.cut()
+    
+    # If using Dummy, print the output to console to verify
+    if isinstance(p, Dummy):
+        print(p.output.decode('utf-8', errors='ignore'))
+
+def run_tui():
+    print("==========================================")
+    print("      THERMAL PRINTER CONTROL CENTER      ")
+    print("==========================================")
+
+    while True:
+        print("\nAvailable Jobs:")
+        print("  [1] Print Math Homework (Multiplication)")
+        print("  [q] Quit")
+
+        choice = input("\nSelect an option: ").strip().lower()
+
+        if choice == '1':
+            p = get_printer()
+            if p:
+                print("Printing...")
+                try:
+                    generate_homework_job(p)
+                    print("Success! Job sent to printer.")
+                except Exception as e:
+                    print(f"Print Error: {e}")
+                finally:
+                    if not isinstance(p, Dummy):
+                        p.close()
+        elif choice == 'q':
+            print("Exiting...")
+            break
+        else:
+            print("Invalid selection. Please try again.")
+
+if __name__ == '__main__':
+    run_tui()