New job: unit conversion. Refactoring to modules

.gitignore

@@ -0,0 +1 @@
+__pycache__

__init__.py

@@ -0,0 +1 @@
+# Package marker

jobs/base.py

@@ -0,0 +1,24 @@
+from datetime import datetime
+
+class Job:
+    def get_name(self):
+        raise NotImplementedError
+
+    def print_body(self, p):
+        raise NotImplementedError
+
+    def run(self, p):
+        # Shared Header
+        p.set(align='center', height=2, width=2, bold=True)
+        p.text(f"{self.get_name()}\n")
+        p.text("-------------\n")
+        
+        p.set(align='left', height=1, width=1, bold=False)
+        now = datetime.now().strftime("%d.%m.%Y %H:%M")
+        p.text(f"Datum: {now}\n\n")
+        
+        # Job specific body
+        self.print_body(p)
+        
+        # Cut
+        p.cut()

jobs/math_homework.py

@@ -0,0 +1,14 @@
+import random
+from .base import Job
+
+class MathHomeworkJob(Job):
+    def get_name(self):
+        return "MALA NASOBILKA"
+
+    def print_body(self, p):
+        p.text("Vypocitej:\n\n")
+        for i in range(1, 11):
+            num1 = random.randint(2, 12)
+            num2 = random.randint(2, 12)
+            p.text(f"{i}) {num1} * {num2} = ____\n\n")
+        p.text("Hodne stesti!\n")

jobs/unit_conversion.py

@@ -0,0 +1,39 @@
+import random
+from .base import Job
+
+class UnitConversionJob(Job):
+    def get_name(self):
+        return "PREVODY JEDNOTEK"
+
+    def print_body(self, p):
+        p.text("Preved:\n\n")
+        
+        # (from_unit, to_unit, factor)
+        conversions = [
+            ('kg', 'g', 1000),
+            ('km', 'm', 1000),
+            ('m', 'cm', 100),
+            ('cm', 'mm', 10),
+            ('h', 'min', 60),
+            ('min', 's', 60)
+        ]
+
+        for i in range(1, 11):
+            u_from, u_to, factor = random.choice(conversions)
+            
+            # Randomly choose direction (multiply or divide)
+            if random.choice([True, False]):
+                # Big to Small (Multiply)
+                val = random.randint(1, 20)
+                question = f"{val} {u_from}"
+                target_unit = u_to
+            else:
+                # Small to Big (Divide) - ensure clean integer
+                target = random.randint(1, 20)
+                val = target * factor
+                question = f"{val} {u_to}"
+                target_unit = u_from
+            
+            p.text(f"{i}) {question} = ____ {target_unit}\n\n")
+            
+        p.text("Hodne stesti!\n")

print_server.py

@@ -1,7 +1,7 @@
-import random
-from datetime import datetime
 from escpos.printer import Usb, Dummy
 from escpos.exceptions import USBNotFoundError
+from jobs.math_homework import MathHomeworkJob
+from jobs.unit_conversion import UnitConversionJob
 
 # ==========================================
 # CONFIGURATION
@@ -36,40 +36,10 @@ def get_printer():
         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'))
+JOBS = [
+    MathHomeworkJob(),
+    UnitConversionJob()
+]
 
 def run_tui():
     print("==========================================")
@@ -78,28 +48,44 @@ def run_tui():
 
     while True:
         print("\nAvailable Jobs:")
-        print("  [1] Print Math Homework (Multiplication)")
+        for i, job in enumerate(JOBS):
+            print(f"  [{i + 1}] {job.get_name()}")
         print("  [q] Quit")
 
         choice = input("\nSelect an option: ").strip().lower()
 
-        if choice == '1':
+        if choice == 'q':
+            print("Exiting...")
+            break
+
+        try:
+            idx = int(choice) - 1
+            if 0 <= idx < len(JOBS):
+                job = JOBS[idx]
+            else:
+                print("Invalid selection.")
+                continue
+        except ValueError:
+            print("Invalid selection.")
+            continue
+
+        if job:
             p = get_printer()
             if p:
-                print("Printing...")
+                print(f"Printing {job.get_name()}...")
                 try:
-                    generate_homework_job(p)
+                    job.run(p)
+                    
+                    # If using Dummy, print the output to console to verify
+                    if isinstance(p, Dummy):
+                        print(p.output.decode('utf-8', errors='ignore'))
+                        
                     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()