[Mem0] Integrate Graph Memory (#1718)

Co-authored-by: Deshraj Yadav <deshrajdry@gmail.com>

mem0/graphs/configs.py

@@ -0,0 +1,40 @@
+from typing import Optional
+
+from pydantic import BaseModel, Field, field_validator, model_validator
+
+class Neo4jConfig(BaseModel):
+    url: Optional[str] = Field(None, description="Host address for the graph database")
+    username: Optional[str] = Field(None, description="Username for the graph database")
+    password: Optional[str] = Field(None, description="Password for the graph database")
+
+    @model_validator(mode="before")
+    def check_host_port_or_path(cls, values):
+        url, username, password = (
+            values.get("url"),
+            values.get("username"),
+            values.get("password"),
+        )
+        if not url and not username and not password:
+            raise ValueError(
+                "Please provide 'url', 'username' and 'password'."
+            )
+        return values
+
+
+class GraphStoreConfig(BaseModel):
+    provider: str = Field(
+        description="Provider of the data store (e.g., 'neo4j')", 
+        default="neo4j"
+    )
+    config: Neo4jConfig = Field(
+        description="Configuration for the specific data store",
+        default=None
+    )
+
+    @field_validator("config")
+    def validate_config(cls, v, values):
+        provider = values.data.get("provider")
+        if provider == "neo4j":
+            return Neo4jConfig(**v.model_dump())
+        else:
+            raise ValueError(f"Unsupported graph store provider: {provider}")