Python Personal Diary Application Project

"""A private command-line diary that stores entries locally in diary.json."""

import json
from datetime import datetime
from pathlib import Path

DIARY_FILE = Path("diary.json")


def load_entries():
    if not DIARY_FILE.exists():
        return []
    try:
        return json.loads(DIARY_FILE.read_text(encoding="utf-8"))
    except json.JSONDecodeError:
        print("The diary file could not be read. Starting with an empty diary.")
        return []


def save_entries(entries):
    DIARY_FILE.write_text(json.dumps(entries, indent=2, ensure_ascii=False), encoding="utf-8")


def add_entry(entries):
    print("Write your entry. Enter a blank line to save it.")
    lines = []
    while True:
        line = input()
        if not line:
            break
        lines.append(line)
    if not lines:
        print("Nothing was saved.\n")
        return
    entries.append({"created_at": datetime.now().strftime("%Y-%m-%d %H:%M"), "text": "\n".join(lines)})
    save_entries(entries)
    print("Diary entry saved.\n")


def view_entries(entries):
    if not entries:
        print("No diary entries yet.\n")
        return
    for index, entry in enumerate(reversed(entries), start=1):
        print(f"\n{index}. {entry['created_at']}\n{entry['text']}\n{'-' * 40}")


def main():
    entries = load_entries()
    print("Personal Diary (local file only)")
    while True:
        choice = input("1. Add entry  2. View entries  3. Quit: ").strip()
        if choice == "1":
            add_entry(entries)
        elif choice == "2":
            view_entries(entries)
        elif choice in {"3", "q", "quit", "exit"}:
            print("Diary closed. Keep diary.json private.")
            break
        else:
            print("Choose 1, 2, or 3.\n")


if __name__ == "__main__":
    main()