app.py

import torch
from PIL import Image
import gradio as gr
import spaces
from transformers import AutoModelForCausalLM, AutoTokenizer, TextIteratorStreamer
import os
from threading import Thread
from pydantic import BaseModel
from typing import Optional
import io
from io import BytesIO

import pymupdf
import docx
from pptx import Presentation

from fastapi import FastAPI, File, Form, UploadFile, HTTPException
from fastapi.responses import HTMLResponse
from fastapi.staticfiles import StaticFiles
from fastapi.responses import StreamingResponse
from fastapi.responses import PlainTextResponse

import uvicorn 
import json

app = FastAPI()

@app.post("/test/")
async def test_endpoint(message: dict):
    if "text" not in message:
        raise HTTPException(status_code=400, detail="Missing 'text' in request body")
    
    response = {"message": f"Received your message: {message['text']}"}
    return response


MODEL_LIST = ["nikravan/glm-4vq"]

HF_TOKEN = os.environ.get("HF_TOKEN", None)
MODEL_ID = MODEL_LIST[0]
MODEL_NAME = "GLM-4vq"

TITLE = "<h1>AI CHAT DOCS</h1>"

DESCRIPTION = f"""
<center>
<p> 
<br>
USANDO MODELO: <a href="https://hf.co/nikravan/glm-4vq">{MODEL_NAME}</a>
</center>"""

CSS = """
h1 {
    text-align: center;
    display: block;
}
"""


tokenizer = AutoTokenizer.from_pretrained(MODEL_ID, trust_remote_code=True)



def extract_text(path):
    return open(path, 'r').read()


def extract_pdf(path):
    doc = pymupdf.open(path)
    text = ""
    for page in doc:
        text += page.get_text()
    return text


def extract_docx(path):
    doc = docx.Document(path)
    data = []
    for paragraph in doc.paragraphs:
        data.append(paragraph.text)
    content = '\n\n'.join(data)
    return content


def extract_pptx(path):
    prs = Presentation(path)
    text = ""
    for slide in prs.slides:
        for shape in slide.shapes:
            if hasattr(shape, "text"):
                text += shape.text + "\n"
    return text


# def mode_load(path):
#     choice = ""
#     file_type = path.split(".")[-1]
#     print(file_type)
#     if file_type in ["pdf", "txt", "py", "docx", "pptx", "json", "cpp", "md"]:
#         if file_type.endswith("pdf"):
#             content = extract_pdf(path)
#         elif file_type.endswith("docx"):
#             content = extract_docx(path)
#         elif file_type.endswith("pptx"):
#             content = extract_pptx(path)
#         else:
#             content = extract_text(path)
#         choice = "doc"
#         print(content[:100])
#         return choice, content[:5000]


#     elif file_type in ["png", "jpg", "jpeg", "bmp", "tiff", "webp"]:
#         content = Image.open(path).convert('RGB')
#         choice = "image"
#         return choice, content

#     else:
#         raise gr.Error("Oops, unsupported files.")


def mode_load(path):
    choice = ""
    file_type = path.split(".")[-1].lower()
    print(file_type)
    
    if file_type in ["pdf", "txt", "py", "docx", "pptx", "json", "cpp", "md"]:
        if file_type == "pdf":
            content = extract_pdf(path)
        elif file_type == "docx":
            content = extract_docx(path)
        elif file_type == "pptx":
            content = extract_pptx(path)
        else:
            content = extract_text(path)
        choice = "doc"
        print(content[:100])
        return choice, content[:5000]
    
    elif file_type in ["png", "jpg", "jpeg", "bmp", "tiff", "webp"]:
        try:
            content = Image.open(path).convert('RGB')
            choice = "image"
            return choice, content
        except Exception as e:
            raise ValueError(f"Error processing image file: {e}")
    
    else:
        raise ValueError("Oops, unsupported file type.")


@spaces.GPU()
def stream_chat(message, history: list, temperature: float, max_length: int, top_p: float, top_k: int, penalty: float):
    
    model = AutoModelForCausalLM.from_pretrained(
        MODEL_ID,
        torch_dtype=torch.bfloat16,
        low_cpu_mem_usage=True,
        trust_remote_code=True
    )
        
    print(f'message is - {message}')
    print(f'history is - {history}')
    conversation = []
    prompt_files = []
    if message["files"]:
        choice, contents = mode_load(message["files"][-1])
        if choice == "image":
            conversation.append({"role": "user", "image": contents, "content": message['text']})
        elif choice == "doc":
            format_msg = contents + "\n\n\n" + "{} files uploaded.\n" + message['text']
            conversation.append({"role": "user", "content": format_msg})
    else:
        if len(history) == 0:
            # raise gr.Error("Please upload an image first.")
            contents = None
            conversation.append({"role": "user", "content": message['text']})
        else:
            # image = Image.open(history[0][0][0])
            for prompt, answer in history:
                if answer is None:
                    prompt_files.append(prompt[0])
                    conversation.extend([{"role": "user", "content": ""}, {"role": "assistant", "content": ""}])
                else:
                    conversation.extend([{"role": "user", "content": prompt}, {"role": "assistant", "content": answer}])
            if len(prompt_files) > 0:
                choice, contents = mode_load(prompt_files[-1])
            else:
                choice = ""
                conversation.append({"role": "user", "image": "", "content": message['text']})


            if choice == "image":
                conversation.append({"role": "user", "image": contents, "content": message['text']})
            elif choice == "doc":
                format_msg = contents + "\n\n\n" + "{} files uploaded.\n" + message['text']
                conversation.append({"role": "user", "content": format_msg})
    print(f"Conversation is -\n{conversation}")

    input_ids = tokenizer.apply_chat_template(conversation, tokenize=True, add_generation_prompt=True,
                                              return_tensors="pt", return_dict=True).to(model.device)
    streamer = TextIteratorStreamer(tokenizer, timeout=60.0, skip_prompt=True, skip_special_tokens=True)

    generate_kwargs = dict(
        max_length=max_length,
        streamer=streamer,
        do_sample=True,
        top_p=top_p,
        top_k=top_k,
        temperature=temperature,
        repetition_penalty=penalty,
        eos_token_id=[151329, 151336, 151338],
    )
    gen_kwargs = {**input_ids, **generate_kwargs}

    with torch.no_grad():
        thread = Thread(target=model.generate, kwargs=gen_kwargs)
        thread.start()
        buffer = ""
        for new_text in streamer:
            buffer += new_text
            yield buffer


chatbot = gr.Chatbot(
    #rtl=True,
)
chat_input = gr.MultimodalTextbox(
    interactive=True,
    placeholder="Enter message or upload a file ...",
    show_label=False,
    #rtl=True,



)

EXAMPLES = [
    [{"text": "Resumir Documento"}],
    [{"text": "Explicar la Imagen"}],
    [{"text": "¿De qué es la foto?", "files": ["perro.jpg"]}],
    [{"text": "Quiero armar un JSON, solo el JSON sin texto, que contenga los datos de la primera mitad de la tabla de la imagen (las primeras 10 jurisdicciones 901-910). Ten en cuenta que los valores numéricos son decimales de cuatro dígitos. La tabla contiene las siguientes columnas: Codigo, Nombre, Fecha Inicio, Fecha Cese, Coeficiente Ingresos, Coeficiente Gastos y Coeficiente Unificado. La tabla puede contener valores vacíos, en ese caso dejarlos como null. Cada fila de la tabla representa una jurisdicción con sus respectivos valores.", }]
]

@spaces.GPU()
def simple_chat(message, temperature: float = 0.8, max_length: int = 4096, top_p: float = 1, top_k: int = 10, penalty: float = 1.0):
    model = AutoModelForCausalLM.from_pretrained(
        MODEL_ID,
        torch_dtype=torch.bfloat16,
        low_cpu_mem_usage=True,
        trust_remote_code=True
    )
        
    print(f'Message is - {message}')

    conversation = []

    if message["file_content"]:
        with open(message['file_name'], 'wb') as temp_file:
            temp_file.write(message['file_content'].read())
            temp_file_path = temp_file.name
            
        choice, contents = mode_load(temp_file_path)
        
        if choice == "image":
            conversation.append({"role": "user", "image": contents, "content": message['text']})
        elif choice == "doc":
            format_msg = contents + "\n\n\n" + "{} files uploaded.\n".format(message['file_name']) + message['text']
            conversation.append({"role": "user", "content": format_msg})
    else:
        conversation.append({"role": "user", "content": message['text']})

    print(f"Conversation is -\n{conversation}")

    input_ids = tokenizer.apply_chat_template(conversation, tokenize=True, add_generation_prompt=True,
                                              return_tensors="pt", return_dict=True).to(model.device)
    
    streamer = TextIteratorStreamer(tokenizer, timeout=60.0, skip_prompt=True, skip_special_tokens=True)

    generate_kwargs = dict(
        max_length=max_length,
        streamer=streamer,
        do_sample=True,
        top_p=top_p,
        top_k=top_k,
        temperature=temperature,
        repetition_penalty=penalty,
        eos_token_id=[151329, 151336, 151338],
    )
    gen_kwargs = {**input_ids, **generate_kwargs}

    buffer = ""

    def generate_text():
        nonlocal buffer
        with torch.no_grad():
            model.generate(**gen_kwargs)
            for new_text in streamer:
                buffer += new_text

    thread = Thread(target=generate_text)
    thread.start()

    thread.join()

    try:
        buffer = buffer.strip()
        buffer = buffer.strip('`')
        buffer = buffer.strip('json')
        json_content = json.loads(buffer)
        formatted_text = format_json_to_string(json_content)
    except json.JSONDecodeError:
        print("entro error")
        formatted_text = buffer

    print("---------")
    print("Respuesta: ")
    print(" ")
    print(formatted_text)
    print(" ")
    print("---------")

    return PlainTextResponse(formatted_text)

def format_json_to_string(json_content):
    return json.dumps(json_content, ensure_ascii=False)


@app.post("/chat/")
async def test_endpoint(
    text: str = Form(...), 
    file: UploadFile = File(None)
):
    if file:
        file_content = BytesIO(await file.read())
        file_name = file.filename
        
        message = {
            "text": text,
            "file_content": file_content,
            "file_name": file_name
        }
    else:
        message = {
            "text": text,
            "file_content": None,
            "file_name": None
        }
    
    print(message)
    response = simple_chat(message)
    
    return response


with gr.Blocks(css=CSS, theme="soft", fill_height=True) as demo:
    gr.HTML(TITLE)
    gr.HTML(DESCRIPTION)
    gr.ChatInterface(
        fn=stream_chat,
        multimodal=True,


        textbox=chat_input,
        chatbot=chatbot,
        fill_height=True,
        additional_inputs_accordion=gr.Accordion(label="⚙️ Parameters", open=False, render=False),
        additional_inputs=[
            gr.Slider(
                minimum=0,
                maximum=1,
                step=0.1,
                value=0.8,
                label="Temperature",
                render=False,
            ),
            gr.Slider(
                minimum=1024,
                maximum=8192,
                step=1,
                value=4096,
                label="Max Length",
                render=False,
            ),
            gr.Slider(
                minimum=0.0,
                maximum=1.0,
                step=0.1,
                value=1.0,
                label="top_p",
                render=False,
            ),
            gr.Slider(
                minimum=1,
                maximum=20,
                step=1,
                value=10,
                label="top_k",
                render=False,
            ),
            gr.Slider(
                minimum=0.0,
                maximum=2.0,
                step=0.1,
                value=1.0,
                label="Repetition penalty",
                render=False,
            ),
        ],
    ),
    gr.Examples(EXAMPLES, [chat_input])

if __name__ == "__main__":

    app = gr.mount_gradio_app(app, demo, "/")
    uvicorn.run(app, host="0.0.0.0", port=7860)

    #app.mount("/static", StaticFiles(directory="static", html=True), name="static")
    # app = gr.mount_gradio_app(app, block, "/", gradio_api_url="http://localhost:7860/")
    # uvicorn.run(app, host="0.0.0.0", port=7860)
    
    demo.queue(api_open=False).launch(show_api=False, share=False, )#server_name="0.0.0.0", )