1 files changed, 66 insertions, 0 deletions
diff --git a/R2R/r2r/base/providers/llm_provider.py b/R2R/r2r/base/providers/llm_provider.py
new file mode 100755
index 00000000..9b6499a4
--- /dev/null
+++ b/R2R/r2r/base/providers/llm_provider.py
@@ -0,0 +1,66 @@
+"""Base classes for language model providers."""
+
+import logging
+from abc import abstractmethod
+from typing import Optional
+
+from r2r.base.abstractions.llm import GenerationConfig
+
+from ..abstractions.llm import LLMChatCompletion, LLMChatCompletionChunk
+from .base_provider import Provider, ProviderConfig
+
+logger = logging.getLogger(__name__)
+
+
+class LLMConfig(ProviderConfig):
+    """A base LLM config class"""
+
+    provider: Optional[str] = None
+    generation_config: Optional[GenerationConfig] = None
+
+    def validate(self) -> None:
+        if not self.provider:
+            raise ValueError("Provider must be set.")
+
+        if self.provider and self.provider not in self.supported_providers:
+            raise ValueError(f"Provider '{self.provider}' is not supported.")
+
+    @property
+    def supported_providers(self) -> list[str]:
+        return ["litellm", "openai"]
+
+
+class LLMProvider(Provider):
+    """An abstract class to provide a common interface for LLMs."""
+
+    def __init__(
+        self,
+        config: LLMConfig,
+    ) -> None:
+        if not isinstance(config, LLMConfig):
+            raise ValueError(
+                "LLMProvider must be initialized with a `LLMConfig`."
+            )
+        logger.info(f"Initializing LLM provider with config: {config}")
+
+        super().__init__(config)
+
+    @abstractmethod
+    def get_completion(
+        self,
+        messages: list[dict],
+        generation_config: GenerationConfig,
+        **kwargs,
+    ) -> LLMChatCompletion:
+        """Abstract method to get a chat completion from the provider."""
+        pass
+
+    @abstractmethod
+    def get_completion_stream(
+        self,
+        messages: list[dict],
+        generation_config: GenerationConfig,
+        **kwargs,
+    ) -> LLMChatCompletionChunk:
+        """Abstract method to get a completion stream from the provider."""
+        pass