Update app.py

app.py

@@ -261,3 +261,135 @@
 # # 🔥 Run Streamlit App
 # if __name__ == '__main__':
 #     main()
+
+import streamlit as st
+import os
+import re
+import torch
+from transformers import AutoModelForCausalLM, AutoTokenizer
+from PyPDF2 import PdfReader
+from peft import get_peft_model, LoraConfig, TaskType
+
+# ✅ Force CPU execution for Hugging Face Spaces
+device = torch.device("cpu")
+
+# 🔹 Load IBM Granite Model (CPU-Compatible)
+MODEL_NAME = "ibm-granite/granite-3.1-2b-instruct"
+
+model = AutoModelForCausalLM.from_pretrained(
+    MODEL_NAME,
+    device_map="cpu",  # Force CPU execution
+    torch_dtype=torch.float32  # Use float32 since Hugging Face runs on CPU
+)
+
+tokenizer = AutoTokenizer.from_pretrained(MODEL_NAME)
+
+# 🔹 Apply LoRA Fine-Tuning Configuration
+lora_config = LoraConfig(
+    r=8,
+    lora_alpha=32,
+    target_modules=["q_proj", "v_proj"],
+    lora_dropout=0.1,
+    bias="none",
+    task_type=TaskType.CAUSAL_LM
+)
+model = get_peft_model(model, lora_config)
+model.eval()
+
+# 🛠 Function to Read & Extract Text from PDFs
+def read_files(file):
+    file_context = ""
+    reader = PdfReader(file)
+    
+    for page in reader.pages:
+        text = page.extract_text()
+        if text:
+            file_context += text + "\n"
+    
+    return file_context.strip()
+
+# 🛠 Function to Format AI Prompts
+def format_prompt(system_msg, user_msg, file_context=""):
+    if file_context:
+        system_msg += f" The user has provided a contract document. Use its context to generate insights, but do not repeat or summarize the document itself."
+    return [
+        {"role": "system", "content": system_msg},
+        {"role": "user", "content": user_msg}
+    ]
+
+# 🛠 Function to Generate AI Responses
+def generate_response(input_text, max_tokens=1000, top_p=0.9, temperature=0.7):
+    model_inputs = tokenizer([input_text], return_tensors="pt").to(device)
+    
+    with torch.no_grad():
+        output = model.generate(
+            **model_inputs,
+            max_new_tokens=max_tokens,
+            do_sample=True,
+            top_p=top_p,
+            temperature=temperature,
+            num_return_sequences=1,
+            pad_token_id=tokenizer.eos_token_id
+        )
+    
+    return tokenizer.decode(output[0], skip_special_tokens=True)
+
+# 🛠 Function to Clean AI Output
+def post_process(text):
+    cleaned = re.sub(r'戥+', '', text)  # Remove unwanted symbols
+    lines = cleaned.splitlines()
+    unique_lines = list(dict.fromkeys([line.strip() for line in lines if line.strip()]))
+    return "\n".join(unique_lines)
+
+# 🛠 Function to Handle RAG with IBM Granite & Streamlit
+def granite_simple(prompt, file):
+    file_context = read_files(file) if file else ""
+    
+    system_message = "You are IBM Granite, a legal AI assistant specializing in contract analysis."
+    
+    messages = format_prompt(system_message, prompt, file_context)
+    input_text = tokenizer.apply_chat_template(messages, tokenize=False, add_generation_prompt=True)
+    
+    response = generate_response(input_text)
+    return post_process(response)
+
+# 🔹 Streamlit UI
+def main():
+    st.set_page_config(page_title="Contract Analysis AI", page_icon="📜")
+
+    st.title("📜 AI-Powered Contract Analysis Tool")
+    st.write("Upload a contract document (PDF) for a detailed AI-driven legal and technical analysis.")
+
+    # 🔹 Sidebar Settings
+    with st.sidebar:
+        st.header("⚙️ Settings")
+        max_tokens = st.slider("Max Tokens", 50, 1000, 250, 50)
+        top_p = st.slider("Top P (sampling)", 0.1, 1.0, 0.9, 0.1)
+        temperature = st.slider("Temperature (creativity)", 0.1, 1.0, 0.7, 0.1)
+
+    # 🔹 File Upload Section
+    uploaded_file = st.file_uploader("📂 Upload a contract document (PDF)", type="pdf")
+
+    if uploaded_file:
+        st.success("✅ File uploaded successfully!")
+        st.write("Click the button below to analyze the contract.")
+
+        # Force button to always render
+        st.markdown('<style>div.stButton > button {display: block; width: 100%;}</style>', unsafe_allow_html=True)
+
+        if st.button("🔍 Analyze Document"):
+            with st.spinner("Analyzing contract document... ⏳"):
+                final_answer = granite_simple(
+                    "Perform a detailed technical analysis of the attached contract document, highlighting potential risks, legal pitfalls, compliance issues, and areas where contractual terms may lead to future disputes or operational challenges.",
+                    uploaded_file
+                )
+
+            # 🔹 Display Analysis Result
+            st.subheader("📑 Analysis Result")
+            st.write(final_answer)
+
+# 🔥 Run Streamlit App
+if __name__ == '__main__':
+    main()
+
+