created simple engine but still needs to be get better

src/engine/__init__.py

@@ -0,0 +1,46 @@
+from engine.types.operation import Operation
+
+
+class SyncEngine:
+    def __init__(self):
+        pass
+
+    def sync(
+        self, cursor: int, operations: list[Operation]
+    ) -> tuple[int, list[Operation]]:
+        """Sync the local database with the server's database.
+
+        Args:
+            cursor (int): The cursor of the last operation that was applied to the local database.
+            operations (list[Operation]): The list of operations that were performed on the local database since the last sync.
+
+        Returns:
+            tuple[int, list[Operation]]: A tuple containing the new cursor and the list of operations that need to be applied to the local database.
+        """
+        # For now, just return the same cursor and an empty list of operations.
+        new_operations = self.get_operations_after_cursor(cursor)
+        if len(operations) > 0:
+            self.apply_operations(operations)
+        return cursor + len(new_operations), new_operations
+
+    def apply_operations(self, operations: list[Operation]) -> None:
+        """Apply the given operations to the local database.
+
+        Args:
+            operations (list[Operation]): The list of operations to apply to the local database.
+        """
+        # For now, just print the operations.
+        for operation in operations:
+            print("APPLYING OPERATION:", operation.model_dump(), flush=True)
+
+    def get_operations_after_cursor(self, cursor: int) -> list[Operation]:
+        """Get the list of operations that were performed on the server's database after the given cursor.
+
+        Args:
+            cursor (int): The cursor of the last operation that was applied to the local database.
+
+        Returns:
+            list[Operation]: The list of operations that were performed on the server's database after the given cursor.
+        """
+        # For now, just return an empty list of operations.
+        return []

src/server/main.py

@@ -1,7 +1,7 @@
 import asyncio
 import time
 
-from .types.operation import Operation
+from engine.types.operation import Operation
 from .types.sync_request import SyncRequest
 from .types.sync_response import SyncResponse
 

src/server/types/sync_request.py

@@ -1,6 +1,6 @@
 from pydantic import BaseModel
 
-from .operation import Operation
+from engine.types.operation import Operation
 
 
 class SyncRequest(BaseModel):
@@ -15,4 +15,4 @@ class SyncRequest(BaseModel):
 
     @classmethod
     def decode(cls, data: bytes):
-        return cls.model_validate_json(data)
+        return cls.model_validate_json(data)

src/server/types/sync_response.py

@@ -1,7 +1,7 @@
 from pydantic import BaseModel
 
-from .operation import Operation
+from engine.types.operation import Operation
-from .snapshot import Snapshot
+from engine.types.snapshot import Snapshot
 
 
 class SyncResponse(BaseModel):