Add alertmanager as supported sender and update deps

ops_bot/config.py

@@ -1,30 +1,37 @@
 import json
 import logging
+import os
+import typing
 from pathlib import Path
 from typing import List, Literal
 
-from pydantic import BaseSettings
+from pydantic_settings import BaseSettings, SettingsConfigDict
 
 from ops_bot.matrix import MatrixClientSettings
 
+env_path = os.getenv("BOT_ENV_FILE")
+
+
+HookType = Literal["gitlab", "pagerduty", "aws-sns", "alertmanager"]
+hook_types = typing.get_args(HookType)
+
 
 class RoutingKey(BaseSettings):
     name: str
     path_key: str
     secret_token: str
     room_id: str
-    hook_type: Literal["gitlab", "pagerduty", "aws-sns"]
+    hook_type: HookType
 
 
 class BotSettings(BaseSettings):
+    model_config = SettingsConfigDict(
+        env_prefix="BOT_", env_file=env_path, env_file_encoding="utf-8"
+    )
     routing_keys: List[RoutingKey]
     log_level: Literal["DEBUG", "INFO", "WARNING", "ERROR", "CRITICAL"] = "INFO"
     matrix: MatrixClientSettings
 
-    class Config:
-        env_prefix = "BOT_"
-        case_sensitive = False
-
     def get_rooms(self) -> List[str]:
         return list(set([key.room_id for key in self.routing_keys]))
 
@@ -35,9 +42,10 @@ def config_file_exists(filename: str) -> bool:
 
 def load_config(filename: str = "config.json") -> BotSettings:
     if config_file_exists(filename):
-        bot_settings = BotSettings.parse_file(filename)
+        with open(filename, "r") as f:
+            bot_settings = BotSettings.model_validate_json(f.read())
     else:
-        bot_settings = BotSettings(_env_file=".env", _env_file_encoding="utf-8")
+        bot_settings = BotSettings()  # type: ignore[call-arg]
     logging.getLogger().setLevel(bot_settings.log_level)
     return bot_settings