Initial commit

app/domain/usecase/GetLatestModelUseCase.py

@@ -0,0 +1,21 @@
+from app.domain.ModelStorage import ModelStorage
+from app.domain.Model import Model
+from app.domain.Exception import ModelNotFoundError
+from app.domain.ModelRepository import ModelRepository
+
+
+class GetLatestModelUseCase:
+    def __init__(self, repository: ModelRepository, storage: ModelStorage) -> None:
+        self._repository = repository
+        self._storage = storage
+
+    def execute(self, version: str | None = None, filename: str | None = None) -> Model:
+        model = self._repository.get_latest()
+        if model is None:
+            raise ModelNotFoundError("No models have been uploaded yet.")
+        if version is not None and model.version != version:
+            raise ModelNotFoundError("Latest model does not match requested version.")
+        if filename is not None and model.filename != filename:
+            raise ModelNotFoundError("Latest model does not match requested filename.")
+        self._storage.ensure_model_file_exists(model.file_path)
+        return model