Update app.py

app.py

@@ -1,16 +1,170 @@
+import os
+import json
+import re
 import gradio as gr
-from huggingface_hub import InferenceApi
-from duckduckgo_search import DDGS
 import requests
-import json
+from duckduckgo_search import DDGS
 from typing import List
 from pydantic import BaseModel, Field
-import os
+from tempfile import NamedTemporaryFile
+from langchain_community.vectorstores import FAISS
+from langchain_community.document_loaders import PyPDFLoader
+from langchain_community.embeddings import HuggingFaceEmbeddings
+from llama_parse import LlamaParse
+from langchain_core.documents import Document
+from huggingface_hub import InferenceClient
+import inspect
 
 # Environment variables and configurations
 huggingface_token = os.environ.get("HUGGINGFACE_TOKEN")
+llama_cloud_api_key = os.environ.get("LLAMA_CLOUD_API_KEY")
+CLOUDFLARE_ACCOUNT_ID = os.environ.get("CLOUDFLARE_ACCOUNT_ID")
+CLOUDFLARE_AUTH_TOKEN = os.environ.get("CLOUDFLARE_AUTH_TOKEN")
+
+MODELS = [
+    "Qwen/Qwen2-72B-Instruct",
+    "google/gemma-2-9b",
+    "microsoft/Phi-3-mini-4k-instruct",
+    "Qwen/Qwen2-7B-Instruct",
+    "mistralai/Mistral-Nemo-Instruct-2407",
+    "mistralai/Mistral-7B-Instruct-v0.3",
+    "mistralai/Mixtral-8x7B-Instruct-v0.1",
+    "cloudflare/llama-3.1-8b-instruct"  # Added Cloudflare Llama 3.1 model
+]
+
+# Initialize LlamaParse
+llama_parser = LlamaParse(
+    api_key=llama_cloud_api_key,
+    result_type="markdown",
+    num_workers=4,
+    verbose=True,
+    language="en",
+)
+
+def load_document(file: NamedTemporaryFile, parser: str = "pypdf") -> List[Document]:
+    """Loads and splits the document into pages."""
+    if parser == "pypdf":
+        loader = PyPDFLoader(file.name)
+        return loader.load_and_split()
+    elif parser == "llamaparse":
+        try:
+            documents = llama_parser.load_data(file.name)
+            return [Document(page_content=doc.text, metadata={"source": file.name}) for doc in documents]
+        except Exception as e:
+            print(f"Error using Llama Parse: {str(e)}")
+            print("Falling back to PyPDF parser")
+            loader = PyPDFLoader(file.name)
+            return loader.load_and_split()
+    else:
+        raise ValueError("Invalid parser specified. Use 'pypdf' or 'llamaparse'.")
+
+def get_embeddings():
+    return HuggingFaceEmbeddings(model_name="sentence-transformers/all-mpnet-base-v2")
+
+def update_vectors(files, parser):
+    if not files:
+        return "Please upload at least one PDF file."
+    
+    embed = get_embeddings()
+    total_chunks = 0
+    
+    all_data = []
+    for file in files:
+        data = load_document(file, parser)
+        all_data.extend(data)
+        total_chunks += len(data)
+    
+    if os.path.exists("faiss_database"):
+        database = FAISS.load_local("faiss_database", embed, allow_dangerous_deserialization=True)
+        database.add_documents(all_data)
+    else:
+        database = FAISS.from_documents(all_data, embed)
+    
+    database.save_local("faiss_database")
+    
+    return f"Vector store updated successfully. Processed {total_chunks} chunks from {len(files)} files using {parser}."
+
+def generate_chunked_response(prompt, model, max_tokens=1000, max_chunks=5, temperature=0.7):
+    if model == "cloudflare/llama-3.1-8b-instruct":
+        return generate_cloudflare_response(prompt, max_tokens, temperature)
+    
+    client = InferenceClient(
+        model,
+        token=huggingface_token,
+    )
+    
+    full_response = ""
+    messages = [{"role": "user", "content": prompt}]
+    
+    try:
+        for message in client.chat_completion(
+            messages=messages,
+            max_tokens=max_tokens,
+            temperature=temperature,
+            stream=True,
+        ):
+            chunk = message.choices[0].delta.content
+            if chunk:
+                full_response += chunk
+        
+    except Exception as e:
+        print(f"Error in generating response: {str(e)}")
+    
+    # Clean up the response
+    clean_response = re.sub(r'<s>\[INST\].*?\[/INST\]\s*', '', full_response, flags=re.DOTALL)
+    clean_response = clean_response.replace("Using the following context:", "").strip()
+    clean_response = clean_response.replace("Using the following context from the PDF documents:", "").strip()
+    
+    return clean_response
+
+def generate_cloudflare_response(prompt, max_tokens, temperature):
+    try:
+        response = requests.post(
+            f"https://api.cloudflare.com/client/v4/accounts/{CLOUDFLARE_ACCOUNT_ID}/ai/run/@cf/meta/llama-3.1-8b-instruct",
+            headers={"Authorization": f"Bearer {CLOUDFLARE_AUTH_TOKEN}"},
+            json={
+                "messages": [
+                    {"role": "system", "content": "You are a friendly assistant"},
+                    {"role": "user", "content": prompt}
+                ],
+                "max_tokens": max_tokens,
+                "temperature": temperature
+            }
+        )
+        
+        # Check if the request was successful
+        response.raise_for_status()
+        
+        result = response.json()
+        if not result:
+            raise ValueError("Empty response from Cloudflare API")
+        
+        if 'result' not in result:
+            raise ValueError(f"Unexpected response format. 'result' key missing. Response: {result}")
+        
+        if 'response' not in result['result']:
+            raise ValueError(f"Unexpected response format. 'response' key missing. Result: {result['result']}")
+        
+        return result['result']['response']
+    
+    except requests.exceptions.RequestException as e:
+        error_message = f"Network error when calling Cloudflare API: {str(e)}"
+        print(error_message)
+        return f"Error: {error_message}"
+    except json.JSONDecodeError as e:
+        error_message = f"Error decoding JSON response from Cloudflare API: {str(e)}"
+        print(error_message)
+        return f"Error: {error_message}"
+    except ValueError as e:
+        error_message = str(e)
+        print(error_message)
+        return f"Error: {error_message}"
+    except Exception as e:
+        error_message = f"Unexpected error in generate_cloudflare_response: {str(e)}"
+        print(error_message)
+        return f"Error: {error_message}"
+
 
-# Function to perform a DuckDuckGo search
 def duckduckgo_search(query):
     with DDGS() as ddgs:
         results = ddgs.text(query, max_results=5)
@@ -22,82 +176,140 @@ class CitingSources(BaseModel):
         description="List of sources to cite. Should be an URL of the source."
     )
 
-def get_response_with_search(query):
-    # Perform the web search
+def get_response_from_pdf(query, model, temperature=0.7):
+    embed = get_embeddings()
+    if os.path.exists("faiss_database"):
+        database = FAISS.load_local("faiss_database", embed, allow_dangerous_deserialization=True)
+    else:
+        return "No documents available. Please upload PDF documents to answer questions."
+
+    retriever = database.as_retriever()
+    relevant_docs = retriever.get_relevant_documents(query)
+    context_str = "\n".join([doc.page_content for doc in relevant_docs])
+
+    prompt = f"""<s>[INST] Using the following context from the PDF documents:
+{context_str}
+Write a detailed and complete response that answers the following user question: '{query}'
+Do not include a list of sources in your response. [/INST]"""
+
+    generated_text = generate_chunked_response(prompt, model, temperature=temperature)
+
+    # Clean the response
+    clean_text = re.sub(r'<s>\[INST\].*?\[/INST\]\s*', '', generated_text, flags=re.DOTALL)
+    clean_text = clean_text.replace("Using the following context from the PDF documents:", "").strip()
+
+    return clean_text
+
+def get_response_with_search(query, model, temperature=0.7):
     search_results = duckduckgo_search(query)
-    
-    # Use the search results as context for the model
     context = "\n".join(f"{result['title']}\n{result['body']}\nSource: {result['href']}\n" 
                         for result in search_results if 'body' in result)
     
-    # Prompt formatted for Mistral-7B-Instruct
     prompt = f"""<s>[INST] Using the following context:
 {context}
 Write a detailed and complete research document that fulfills the following user request: '{query}'
 After writing the document, please provide a list of sources used in your response. [/INST]"""
     
-    # API endpoint for Mistral-7B-Instruct-v0.3
-    API_URL = "https://api-inference.huggingface.co/models/mistralai/Mistral-7B-Instruct-v0.3"
-    
-    # Headers
-    headers = {"Authorization": f"Bearer {huggingface_token}"}
+    generated_text = generate_chunked_response(prompt, model, temperature=temperature)
     
-    # Payload
-    payload = {
-        "inputs": prompt,
-        "parameters": {
-            "max_new_tokens": 1000,
-            "temperature": 0.7,
-            "top_p": 0.95,
-            "top_k": 40,
-            "repetition_penalty": 1.1
-        }
-    }
+    # Clean the response
+    clean_text = re.sub(r'<s>\[INST\].*?\[/INST\]\s*', '', generated_text, flags=re.DOTALL)
+    clean_text = clean_text.replace("Using the following context:", "").strip()
     
-    # Make the API call
-    response = requests.post(API_URL, headers=headers, json=payload)
+    # Split the content and sources
+    parts = clean_text.split("Sources:", 1)
+    main_content = parts[0].strip()
+    sources = parts[1].strip() if len(parts) > 1 else ""
     
-    if response.status_code == 200:
-        result = response.json()
-        if isinstance(result, list) and len(result) > 0:
-            generated_text = result[0].get('generated_text', 'No text generated')
-            
-            # Remove the instruction part
-            content_start = generated_text.find("[/INST]")
-            if content_start != -1:
-                generated_text = generated_text[content_start + 7:].strip()
-            
-            # Split the response into main content and sources
-            parts = generated_text.split("Sources:", 1)
-            main_content = parts[0].strip()
-            sources = parts[1].strip() if len(parts) > 1 else ""
-            
-            return main_content, sources
-        else:
-            return f"Unexpected response format: {result}", ""
+    return main_content, sources
+
+def chatbot_interface(message, history, use_web_search, model, temperature):
+    if not message.strip():  # Check if the message is empty or just whitespace
+        return history
+
+    if use_web_search:
+        main_content, sources = get_response_with_search(message, model, temperature)
+        formatted_response = f"{main_content}\n\nSources:\n{sources}"
     else:
-        return f"Error: API returned status code {response.status_code}", ""
-
-def chatbot_interface(message, history):
-    main_content, sources = get_response_with_search(message)
-    formatted_response = f"{main_content}\n\nSources:\n{sources}"
-    return formatted_response
-
-# Gradio chatbot interface
-iface = gr.ChatInterface(
-    fn=chatbot_interface,
-    title="AI-powered Web Search Assistant",
-    description="Ask questions, and I'll search the web and provide answers using the Mistral-7B-Instruct model.",
-    examples=[
-        ["What are the latest developments in AI?"],
-        ["Tell me about recent updates on GitHub"],
-        ["What are the best hotels in Galapagos, Ecuador?"],
-        ["Summarize recent advancements in Python programming"],
-    ],
-    retry_btn="Retry",
-    undo_btn="Undo",
-    clear_btn="Clear",
-)
+        response = get_response_from_pdf(message, model, temperature)
+        formatted_response = response
+
+    # Check if the last message in history is the same as the current message
+    if history and history[-1][0] == message:
+        # Replace the last response instead of adding a new one
+        history[-1] = (message, formatted_response)
+    else:
+        # Add the new message-response pair
+        history.append((message, formatted_response))
+
+    return history
+
+
+def clear_and_update_chat(message, history, use_web_search, model, temperature):
+    updated_history = chatbot_interface(message, history, use_web_search, model, temperature)
+    return "", updated_history  # Return empty string to clear the input
+
+# Gradio interface
+with gr.Blocks() as demo:
+    
+    is_generating = gr.State(False)
+
+    def protected_clear_and_update_chat(message, history, use_web_search, model, temperature, is_generating):
+        if is_generating:
+            return message, history, is_generating
+        is_generating = True
+        updated_message, updated_history = clear_and_update_chat(message, history, use_web_search, model, temperature)
+        is_generating = False
+        return updated_message, updated_history, is_generating
+    
+    gr.Markdown("# AI-powered Web Search and PDF Chat Assistant")
+    
+    with gr.Row():
+        file_input = gr.Files(label="Upload your PDF documents", file_types=[".pdf"])
+        parser_dropdown = gr.Dropdown(choices=["pypdf", "llamaparse"], label="Select PDF Parser", value="pypdf")
+        update_button = gr.Button("Upload Document")
+    
+    update_output = gr.Textbox(label="Update Status")
+    update_button.click(update_vectors, inputs=[file_input, parser_dropdown], outputs=update_output)
+    
+    chatbot = gr.Chatbot(label="Conversation")
+    msg = gr.Textbox(label="Ask a question")
+    use_web_search = gr.Checkbox(label="Use Web Search", value=False)
+    
+    with gr.Row():
+        model_dropdown = gr.Dropdown(choices=MODELS, label="Select Model", value=MODELS[2])
+        temperature_slider = gr.Slider(minimum=0.1, maximum=1.0, value=0.7, step=0.1, label="Temperature")
+    
+    submit = gr.Button("Submit")
+
+    gr.Examples(
+        examples=[
+            ["What are the latest developments in AI?"],
+            ["Tell me about recent updates on GitHub"],
+            ["What are the best hotels in Galapagos, Ecuador?"],
+            ["Summarize recent advancements in Python programming"],
+        ],
+        inputs=msg,
+    )
+
+    submit.click(protected_clear_and_update_chat, 
+                 inputs=[msg, chatbot, use_web_search, model_dropdown, temperature_slider, is_generating], 
+                 outputs=[msg, chatbot, is_generating])
+    msg.submit(protected_clear_and_update_chat, 
+               inputs=[msg, chatbot, use_web_search, model_dropdown, temperature_slider, is_generating], 
+               outputs=[msg, chatbot, is_generating])
+
+    gr.Markdown(
+    """
+    ## How to use
+    1. Upload PDF documents using the file input at the top.
+    2. Select the PDF parser (pypdf or llamaparse) and click "Upload Document" to update the vector store.
+    3. Ask questions in the textbox. 
+    4. Toggle "Use Web Search" to switch between PDF chat and web search.
+    5. Adjust Temperature and Repetition Penalty sliders to fine-tune the response generation.
+    6. Click "Submit" or press Enter to get a response.
+    """
+    )
 
 if __name__ == "__main__":
-    iface.launch(share=True)
+    demo.launch(share=True)