feat(welcome): add welcome message handling to repository interfaces

- Introduced abstract methods for getting and setting custom welcome messages in both synchronous and asynchronous repository classes.
- Implemented in-memory storage for welcome messages and global verification status in the InMemoryRepository class.
- Enhanced user verification logic to support global verification across all chats.

Author: MattiaFailla

src/python_italy_bot/config.py

@@ -49,3 +49,4 @@ def __init__(self) -> None:
         )
         self.main_group_id: int | None = _get_optional_int("MAIN_GROUP_ID")
         self.local_group_ids: list[int] = _get_int_list("LOCAL_GROUP_IDS")
+        self.rules_url: str | None = _get_optional_env("RULES_URL")

src/python_italy_bot/db/base.py

@@ -86,6 +86,26 @@ def add_report(
         """Record a report."""
         ...
 
+    @abstractmethod
+    def get_welcome_message(self, chat_id: int) -> str | None:
+        """Get custom welcome message for a chat."""
+        ...
+
+    @abstractmethod
+    def set_welcome_message(self, chat_id: int, message: str | None) -> None:
+        """Set custom welcome message for a chat. Pass None to remove."""
+        ...
+
+    @abstractmethod
+    def is_globally_verified(self, user_id: int) -> bool:
+        """Check if user is globally verified across all chats."""
+        ...
+
+    @abstractmethod
+    def mark_globally_verified(self, user_id: int) -> None:
+        """Mark user as globally verified."""
+        ...
+
 
 class AsyncRepository(ABC):
     """Abstract interface for data persistence (async)."""
@@ -170,6 +190,26 @@ async def add_report(
         """Record a report."""
         ...
 
+    @abstractmethod
+    async def get_welcome_message(self, chat_id: int) -> str | None:
+        """Get custom welcome message for a chat."""
+        ...
+
+    @abstractmethod
+    async def set_welcome_message(self, chat_id: int, message: str | None) -> None:
+        """Set custom welcome message for a chat. Pass None to remove."""
+        ...
+
+    @abstractmethod
+    async def is_globally_verified(self, user_id: int) -> bool:
+        """Check if user is globally verified across all chats."""
+        ...
+
+    @abstractmethod
+    async def mark_globally_verified(self, user_id: int) -> None:
+        """Mark user as globally verified."""
+        ...
+
     async def close(self) -> None:
         """Close any resources (override if needed)."""
         pass

src/python_italy_bot/db/in_memory.py

@@ -15,6 +15,8 @@ def __init__(self) -> None:
         self._bans: list[Ban] = []
         self._mutes: list[Mute] = []
         self._reports: list[Report] = []
+        self._welcome_messages: dict[int, str] = {}
+        self._globally_verified: set[int] = set()
 
     async def add_pending_verification(self, user_id: int, chat_id: int) -> None:
         self._pending.add((user_id, chat_id))
@@ -117,3 +119,18 @@ async def add_report(
                 created_at=datetime.now(timezone.utc),
             )
         )
+
+    async def get_welcome_message(self, chat_id: int) -> str | None:
+        return self._welcome_messages.get(chat_id)
+
+    async def set_welcome_message(self, chat_id: int, message: str | None) -> None:
+        if message is None:
+            self._welcome_messages.pop(chat_id, None)
+        else:
+            self._welcome_messages[chat_id] = message
+
+    async def is_globally_verified(self, user_id: int) -> bool:
+        return user_id in self._globally_verified
+
+    async def mark_globally_verified(self, user_id: int) -> None:
+        self._globally_verified.add(user_id)