Updated scripts and added new

util.py

@@ -0,0 +1,36 @@
+import sys
+from pathlib import Path
+from zipfile import ZipFile
+
+
+def is_valid_zip(file: Path) -> bool:
+    """
+    Checks if a zip file is a save file from the minimax simulator, e.g. if the contents
+    are a 'machine.json' and 'signal.json' file.
+    """
+    if not file.suffix == ".zip":
+        return False
+    with ZipFile(file) as machine_zip:
+        zip_content = machine_zip.namelist()
+    return set(zip_content) == set(("machine.json", "signal.json"))
+
+
+def select_zip(zips: list[Path]) -> Path:
+    """
+    Prompts the user to select a single zip file from a list, and returns it.
+    """
+    print("Multiple zip files found. Please select one:")
+    for index, f in enumerate(zips, start=1):
+        print(f"[{index}] {f.name}")
+    while True:
+        try:
+            selection = input("Enter the number of the zip file to select:    ")
+            selection = int(selection) - 1
+            if selection <= 0 or selection > len(zips):
+                print(f"Please select a number between 1 and {len(zips)}.")
+            else:
+                return zips[selection]
+        except ValueError:
+            print("Please enter a valid integer.")
+        except KeyboardInterrupt:
+            sys.exit("Aborted")