WebHost: allow getting checksum-specific datapackage via /api/datapackage/<checksum> (#3451)

* WebHost: allow getting checksum-specific datapackage via /api/datapackage/<checksum>

* match import style of /api/generate

WebHostLib/api/__init__.py

@@ -5,7 +5,6 @@ from uuid import UUID
 from flask import Blueprint, abort, url_for
 
 import worlds.Files
-from .. import cache
 from ..models import Room, Seed
 
 api_endpoints = Blueprint('api', __name__, url_prefix="/api")
@@ -49,21 +48,4 @@ def room_info(room: UUID):
     }
 
 
-@api_endpoints.route('/datapackage')
+from . import generate, user, datapackage  # trigger registration
-@cache.cached()
-def get_datapackage():
-    from worlds import network_data_package
-    return network_data_package
-
-
-@api_endpoints.route('/datapackage_checksum')
-@cache.cached()
-def get_datapackage_checksums():
-    from worlds import network_data_package
-    version_package = {
-        game: game_data["checksum"] for game, game_data in network_data_package["games"].items()
-    }
-    return version_package
-
-
-from . import generate, user  # trigger registration

WebHostLib/api/datapackage.py

@@ -0,0 +1,32 @@
+from flask import abort
+
+from Utils import restricted_loads
+from WebHostLib import cache
+from WebHostLib.models import GameDataPackage
+from . import api_endpoints
+
+
+@api_endpoints.route('/datapackage')
+@cache.cached()
+def get_datapackage():
+    from worlds import network_data_package
+    return network_data_package
+
+
+@api_endpoints.route('/datapackage/<string:checksum>')
+@cache.memoize(timeout=3600)
+def get_datapackage_by_checksum(checksum: str):
+    package = GameDataPackage.get(checksum=checksum)
+    if package:
+        return restricted_loads(package.data)
+    return abort(404)
+
+
+@api_endpoints.route('/datapackage_checksum')
+@cache.cached()
+def get_datapackage_checksums():
+    from worlds import network_data_package
+    version_package = {
+        game: game_data["checksum"] for game, game_data in network_data_package["games"].items()
+    }
+    return version_package