move snake config read functions into battlesnake template and use TemplateSnake as default Version of Snakes

server/Server.py

@@ -1,6 +1,5 @@
 from quart_common.web.logger import build_logger, await_log
 from quart_common.web.env import env_bool, env_int
-from server.Files import read_file
 
 from server.game_state_store import GameStateStoreBuilder
 from snakes import SnakeBuilder
@@ -14,8 +13,7 @@ from server.metrics import (
   MetricsCollector,
 )
 
-import asyncio, signal, logging, json, os, re, time
-from typing import cast
+import asyncio, signal, logging, os, re, time
 from quart import Quart
 
 from server.blueprints import (
@@ -32,15 +30,6 @@ from server.services import (
 )
 
 class Server:
-  default_snake_config = {
-    'apiversion': '1',
-    'author': '',
-    'color': '#888888',
-    'head': 'default',
-    'tail': 'default',
-    'version': '1.0.0',
-  }
-
   def __init__(self, data_path:str, snake_type:str, storage_type:str, debug:bool=False, check_tls_security:bool=False, game_state_backend:str='memory', game_state_redis_url:str='redis://localhost:6379/0', game_state_ttl_sec:int=900, game_state_local_cache:bool=True, metrics_backend:str='memory', metrics_redis_url:str='redis://localhost:6379/0', metrics_ttl_sec:int|None=None, gameplay_db_enabled:bool=True, gameplay_db_path:str|None=None, gameplay_db_busy_timeout_ms:int=5000):
     self.debug = debug
     self.snake_type = snake_type
@@ -97,6 +86,7 @@ class Server:
 
     self.logger = build_logger('Battlesnake', debug_env_var='DEBUG_SERVER')
     self.snake_version = self._get_snake_version()
+
     self.gameplay_database = None
     if gameplay_db_enabled:
       db_path = gameplay_db_path or os.path.join(data_path, 'data', 'database', 'gameplay.sqlite3')
@@ -190,30 +180,10 @@ class Server:
         except Exception:
           continue
 
-  async def _read_json_config_or_create(self) -> dict[str, str]:
-    snake_config = cast(dict[str, str]|None, await read_file(self.config_file, json.load))
-    if not snake_config:
-      return await self._override_snake_config_with_environment_variables(self.default_snake_config)
-    return await self._override_snake_config_with_environment_variables(snake_config)
-
-  async def _override_snake_config_with_environment_variables(self, config:dict[str, str]) -> dict[str, str]:
-    config['version'] = self.snake_version
-
-    for key in ('author', 'color', 'head', 'tail'):
-      value = os.environ.get(f'SNAKE_{key.upper()}')
-      if value is not None:
-        config[key] = value
-
-    version_override = os.environ.get('SNAKE_VERSION')
-    if version_override is not None:
-      config['version'] = version_override
-
-    return config
-
   def _get_snake_version(self) -> str:
     configured_version = SnakeBuilder.get_version(self.snake_type)
     if configured_version is None:
-      return self.default_snake_config['version']
+      return str(SnakeBuilder.get_version('TemplateSnake'))
     return str(configured_version)
 
   def _get_stale_game_timeout_sec(self) -> int:

server/blueprints/battlesnake.py

@@ -5,7 +5,9 @@ from quart import Blueprint, request, jsonify
 
 from quart_common.web.logger import await_log
 from server.database import StorageLoader
+from snakes import DEFAULT_SNAKE_CONFIG
 from server.GameBoard import GameBoard
+from server.Files import read_file
 
 if TYPE_CHECKING:
   from server.Server import Server
@@ -13,12 +15,33 @@ if TYPE_CHECKING:
 def create_battlesnake_blueprint(server:'Server') -> Blueprint:
   blueprint = Blueprint('battlesnake', __name__)
 
+  async def _override_snake_config_with_environment_variables(config:dict[str, str]) -> dict[str, str]:
+    print(config)
+    config['version'] = server.snake_version
+
+    for key in ('author', 'color', 'head', 'tail'):
+      value = os.environ.get(f'SNAKE_{key.upper()}')
+      if value is not None:
+        config[key] = value
+
+    version_override = os.environ.get('SNAKE_VERSION')
+    if version_override is not None:
+      config['version'] = version_override
+
+    return config
+
   @blueprint.get('/')
   async def on_info():
     server.metrics_collector.record_http_request('info')
-    snake_config = await server._read_json_config_or_create()
-    await await_log(server.logger.info(f'INFO Snake: {snake_config}'))
-    return snake_config
+
+    snake_config = cast(dict[str, str]|None, await read_file(server.config_file, json.load))
+    if not snake_config:
+      snake_json = await _override_snake_config_with_environment_variables(DEFAULT_SNAKE_CONFIG)
+    else:
+      snake_json = await _override_snake_config_with_environment_variables(snake_config)
+
+    await await_log(server.logger.info(f'INFO Snake: {snake_json}'))
+    return snake_json
 
   @blueprint.post('/start')
   async def on_start():

snakes/__init__.py

@@ -11,7 +11,15 @@ SNAKE_REGISTRY = {
   "UltimateBattleSnake": "4.5.0",
 }
 
-def build_snake(selected_snake: str):
+DEFAULT_SNAKE_CONFIG = {
+  'apiversion': '1',
+  'author': '',
+  'color': '#888888',
+  'head': 'default',
+  'tail': 'default',
+}
+
+def build_snake(selected_snake:str):
   if selected_snake not in SNAKE_REGISTRY:
     raise ValueError(f"Unknown snake: {selected_snake}")
 
@@ -19,7 +27,7 @@ def build_snake(selected_snake: str):
   snake_class = getattr(snake_module, selected_snake)
   return snake_class()
 
-def get_snake_version(selected_snake: str) -> str | None:
+def get_snake_version(selected_snake:str) -> str|None:
   version = SNAKE_REGISTRY.get(selected_snake)
   if version is None:
     return None
@@ -31,5 +39,5 @@ class SnakeBuilder:
     return build_snake(selected_snake)
 
   @classmethod
-  def get_version(self, selected_snake: str) -> str | None:
+  def get_version(self, selected_snake:str) -> str|None:
     return get_snake_version(selected_snake)