Finish assignment

submissions/Abdiazizb11/Assignment 3/catalog.py

@@ -0,0 +1,115 @@
+# Name: Abdiaziz Bishar Hussein
+# Description: A terminal-based personal movie catalog manager using OOP, file handling, and collections.
+
+from dataclasses import dataclass
+
+@dataclass
+class CatalogItem:
+    """Represents a single item in the catalog."""
+    title: str
+    year: int
+
+    def __str__(self) -> str:
+        """Optional: Custom string representation for nicer printing."""
+        return f"{self.title} ({self.year})"
+
+
+class Catalog:
+    """Manages a collection of CatalogItem objects."""
+    def __init__(self):
+        self.items: list[CatalogItem] = []
+
+    def add_item(self, item: CatalogItem) -> None:
+        """Adds a CatalogItem to the internal list."""
+        self.items.append(item)
+
+    def list_all(self) -> None:
+        """Prints all items in a readable format."""
+        if not self.items:
+            print("\nYour catalog is currently empty.")
+            return
+
+        print("\n--- Current Catalog Items ---")
+        for index, item in enumerate(self.items, 1):
+            print(f"{index}. {item}")
+        print("----------------------------")
+
+
+def load_catalog(path: str, catalog: Catalog) -> None:
+    """Loads catalog data from a text file. Handles FileNotFoundError gracefully."""
+    try:
+        with open(path, "r", encoding="utf-8") as file:
+            for line in file:
+                # Strip newline characters and skip empty lines
+                cleaned_line = line.strip()
+                if not cleaned_line:
+                    continue
+
+                # Split line by the pipe character
+                title, year_str = cleaned_line.split("|")
+
+                # Create the item and add it to the catalog
+                item = CatalogItem(title=title, year=int(year_str))
+                catalog.add_item(item)
+        print(f"\n[System] Successfully loaded data from {path}.")
+    except FileNotFoundError:
+        # If missing, do nothing and start with an empty catalog as required
+        print(f"\n[System] '{path}' not found. Starting with a fresh catalog.")
+    except (ValueError, IndexError):
+        print(f"\n[Warning] Found corrupted data line in '{path}'. Skipping bad entry.")
+
+
+def save_catalog(path: str, catalog: Catalog) -> None:
+    """Saves the catalog items back to the text file using the 'title|year' format."""
+    with open(path, "w", encoding="utf-8") as file:
+        for item in catalog.items:
+            file.write(f"{item.title}|{item.year}\n")
+    print(f"[System] Catalog successfully saved to '{path}'.")
+
+
+def main():
+    # Initialize the catalog tracking object
+    catalog = Catalog()
+    data_file = "catalog_data.txt"
+
+    # Load any existing data before entering the interactive loop
+    load_catalog(data_file, catalog)
+
+    while True:
+        print("\nMy Catalog — Movies")
+        print("1) Add  2) List  3) Save  4) Quit")
+
+        choice = input("Pick (1-4): ").strip()
+
+        if choice == "1":
+            title = input("Title: ").strip()
+            if not title:
+                print("Title cannot be empty. Item not added.")
+                continue
+
+            try:
+                year = int(input("Year: ").strip())
+                new_item = CatalogItem(title=title, year=year)
+                catalog.add_item(new_item)
+                print(f"Added: {new_item}")
+            except ValueError:
+                print("Invalid input. Year must be a valid integer. Item not added.")
+
+        elif choice == "2":
+            catalog.list_all()
+
+        elif choice == "3":
+            save_catalog(data_file, catalog)
+
+        elif choice == "4":
+            print("\nSaving final changes...")
+            save_catalog(data_file, catalog)
+            print("Saved. Bye!")
+            break
+
+        else:
+            print("Invalid choice. Please select an option between 1 and 4.")
+
+
+if __name__ == "__main__":
+    main()