Add calendar implementation: models, storage, CLI

models.py

@@ -0,0 +1,35 @@
+import json
+from datetime import datetime
+from typing import List, Optional
+
+class Event:
+    """Класс события календаря"""
+    
+    def __init__(self, title: str, date: str, time: str = "", description: str = ""):
+        self.title = title
+        self.date = date  # формат YYYY-MM-DD
+        self.time = time  # формат HH:MM
+        self.description = description
+    
+    def to_dict(self) -> dict:
+        """Преобразует событие в словарь для JSON"""
+        return {
+            "title": self.title,
+            "date": self.date,
+            "time": self.time,
+            "description": self.description
+        }
+    
+    @classmethod
+    def from_dict(cls, data: dict) -> 'Event':
+        """Создаёт событие из словаря"""
+        return cls(
+            title=data["title"],
+            date=data["date"],
+            time=data.get("time", ""),
+            description=data.get("description", "")
+        )
+    
+    def __str__(self) -> str:
+        time_str = f" в {self.time}" if self.time else ""
+        return f"{self.date}{time_str}: {self.title} - {self.description}"