refactor(backups): redis model storage utils

selfprivacy_api/utils/redis_model_storage.py

@@ -0,0 +1,30 @@
+from datetime import datetime
+from typing import Optional
+
+
+def store_model_as_hash(redis, redis_key, model):
+    for key, value in model.dict().items():
+        if isinstance(value, datetime):
+            value = value.isoformat()
+        redis.hset(redis_key, key, str(value))
+
+
+def hash_as_model(redis, redis_key: str, model_class):
+    token_dict = _model_dict_from_hash(redis, redis_key)
+    if token_dict is not None:
+        return model_class(**token_dict)
+    return None
+
+
+def _prepare_model_dict(d: dict):
+    for key in d.keys():
+        if d[key] == "None":
+            d[key] = None
+
+
+def _model_dict_from_hash(redis, redis_key: str) -> Optional[dict]:
+    if redis.exists(redis_key):
+        token_dict = redis.hgetall(redis_key)
+        _prepare_model_dict(token_dict)
+        return token_dict
+    return None

tests/test_model_storage.py

@@ -0,0 +1,36 @@
+import pytest
+
+from pydantic import BaseModel
+from datetime import datetime
+from typing import Optional
+
+from selfprivacy_api.utils.redis_model_storage import store_model_as_hash, hash_as_model
+from selfprivacy_api.utils.redis_pool import RedisPool
+
+TEST_KEY = "model_storage"
+redis = RedisPool().get_connection()
+
+@pytest.fixture()
+def clean_redis():
+    redis.delete(TEST_KEY)
+
+
+class DummyModel(BaseModel):
+    name: str
+    date: Optional[datetime]
+
+def test_store_retrieve():
+    model = DummyModel(
+        name= "test",
+        date= datetime.now()
+    )
+    store_model_as_hash(redis, TEST_KEY, model)
+    assert hash_as_model(redis, TEST_KEY, DummyModel) == model 
+
+def test_store_retrieve_none():
+    model = DummyModel(
+        name= "test",
+        date= None
+    )
+    store_model_as_hash(redis, TEST_KEY, model)
+    assert hash_as_model(redis, TEST_KEY, DummyModel) == model