Memory component (#60)

* Fixed webloader bug

* Added memory component and Chat Buffer memory

src/beyondllm/generator/generate.py

@@ -7,6 +7,7 @@
 import pysbd
 from .base import BaseGenerator,GeneratorConfig
 from dataclasses import dataclass,field
+from beyondllm.memory.base import BaseMemory
 
 def default_llm():
     api_key = os.getenv('GOOGLE_API_KEY')
@@ -52,7 +53,8 @@ class Generate:
     system_prompt: str = None
     retriever:str = ''
     llm: GeminiModel = field(default_factory=default_llm)
-
+    memory: BaseMemory = None
+
     def __post_init__(self):
         self.pipeline()
 
@@ -63,20 +65,30 @@ def pipeline(self):
         if self.system_prompt is None:
             self.system_prompt = """
             You are an AI assistant who always answer to the user QUERY within the given CONTEXT \
-            You are only job here it to act as knowledge transfer and given accurate response to QUERY by looking in depth into CONTEXT \
-            If QUERY is not with the context, YOU MUST tell `I don't know. The query is not in the given context` \
+            You are only job here it to act as knowledge transfer and given accurate response to QUERY by looking in depth into CONTEXT. \
+            Use both the context and CHAT HISTORY to answer the query. \
+            If QUERY is not within the context or chat history, YOU MUST tell `I don't know. The query is not in the given context` \
             YOU MUST not hallucinate. You are best when it comes to answering from CONTEXT \
-            If you FAIL to execute this task, you will be fired and you will suffer \
+            If you FAIL to execute this task, you will be fired and you will suffer 
             """
 
+        memory_content = ""
+        if self.memory is not None:
+            memory_content = self.memory.get_memory()
+
         template = f"""
         {self.system_prompt}
 
         CONTEXT: {temp}
+        --------------------
+        CHAT HISTORY: {memory_content}
         QUERY: {self.question}
         """
 
         self.RESPONSE = self.llm.predict(template)
+        # Store the question and response in memory
+        if self.memory is not None:
+            self.memory.add_to_memory(question=self.question, response=self.RESPONSE)
         return self.CONTEXT,self.RESPONSE
 
     def call(self):

src/beyondllm/memory/__init__.py

@@ -0,0 +1 @@
+from .chatBufferMemory import ChatBufferMemory

src/beyondllm/memory/base.py

@@ -0,0 +1,35 @@
+from typing import Any, Dict, List, Optional
+from abc import ABC, abstractmethod
+from pydantic import BaseModel
+
+class MemoryConfig(BaseModel):
+    """Base configuration model for all memory components.
+
+    This class can be extended to include more fields specific to certain memory components.
+    """
+    pass 
+
+class BaseMemory(ABC):
+    """
+    Base class for memory components.
+    """
+
+    @abstractmethod
+    def load_memory(self, **kwargs) -> None:
+        """Loads the memory component."""
+        raise NotImplementedError
+
+    @abstractmethod
+    def add_to_memory(self,  context: str, response: str) -> None:
+        """Adds the conversation context and response to memory."""
+        raise NotImplementedError
+
+    @abstractmethod
+    def get_memory(self) -> Any:
+        """Returns the current memory."""
+        raise NotImplementedError
+
+    @abstractmethod
+    def clear_memory(self) -> None:
+        """Clears the memory."""
+        raise NotImplementedError

src/beyondllm/memory/chatBufferMemory.py

@@ -0,0 +1,41 @@
+from dataclasses import dataclass, field
+from typing import List, Optional, Dict
+from .base import BaseMemory, MemoryConfig
+import re
+
+@dataclass
+class ChatBufferMemory(BaseMemory):
+    """
+    ChatBufferMemory stores the recent conversation history as a buffer.
+
+    Args:
+        window_size (int): The maximum number of messages to store in the buffer.
+        memory_key (str): The key to identify the memory.
+        max_tokens (int): The maximum number of tokens to store in the buffer. Defaults to None, which means no limit. 
+    """
+
+    window_size: int = 5
+    memory_key: str = "chat_buffer"
+    _buffer: List[Dict[str, str]] = field(default_factory=list)
+    config: MemoryConfig = field(default_factory=MemoryConfig)
+
+    def load_memory(self, **kwargs) -> None:
+        self._buffer = []
+        self.config = MemoryConfig(**kwargs)
+
+    def add_to_memory(self, question: str, response: str) -> None:
+        """Adds the context and response to the buffer, maintaining the window size."""
+        self._buffer.append(
+            {"question": question, "response": response}
+        )
+
+        if len(self._buffer) > self.window_size+1:
+            self._buffer.pop(0)
+
+    def get_memory(self) -> List[Dict[str, str]]:
+        """Returns the current buffer."""
+        return self._buffer
+
+    def clear_memory(self) -> None:
+        """Clears the buffer."""
+        self._buffer = []