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app.py

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+import app as gr
+from auth import login, signup
+from certificate_ai import read_pdf, verify_certificate
+from db import cert_collection
+
+current_user = {"username":None,"role":None}
+
+
+def user_login(username,password):
+
+    role = login(username,password)
+
+    if role == "user":
+        current_user["username"] = username
+        return "User Login Successful"
+
+    if role == "admin":
+        current_user["username"] = username
+        return "Admin Login Successful"
+
+    return "Invalid Login"
+
+
+def upload_certificate(file):
+
+    text = read_pdf(file)
+
+    result = verify_certificate(text)
+
+    cert_collection.insert_one({
+        "username":current_user["username"],
+        "certificate_text":text,
+        "result":result
+    })
+
+    return result
+
+
+def view_certificates():
+
+    data = cert_collection.find()
+
+    output = []
+
+    for d in data:
+        output.append([d["username"],d["result"]])
+
+    return output
+
+
+with gr.Blocks() as demo:
+
+    gr.Markdown("# Internship Certificate Verification System")
+
+    with gr.Tab("Signup"):
+
+        username = gr.Textbox(label="Username")
+        password = gr.Textbox(label="Password",type="password")
+        role = gr.Dropdown(["user","admin"])
+
+        signup_btn = gr.Button("Signup")
+        signup_output = gr.Textbox()
+
+        signup_btn.click(signup,
+                         inputs=[username,password,role],
+                         outputs=signup_output)
+
+
+    with gr.Tab("Login"):
+
+        l_user = gr.Textbox(label="Username")
+        l_pass = gr.Textbox(label="Password",type="password")
+
+        login_btn = gr.Button("Login")
+        login_output = gr.Textbox()
+
+        login_btn.click(user_login,
+                        inputs=[l_user,l_pass],
+                        outputs=login_output)
+
+
+    with gr.Tab("Upload Certificate"):
+
+        file = gr.File(label="Upload PDF")
+
+        verify_btn = gr.Button("Verify")
+
+        result = gr.Textbox(label="Result")
+
+        verify_btn.click(upload_certificate,
+                         inputs=file,
+                         outputs=result)
+
+
+    with gr.Tab("Admin Dashboard"):
+
+        view_btn = gr.Button("View Certificates")
+
+        table = gr.Dataframe(headers=["Username","Result"])
+
+        view_btn.click(view_certificates,
+                       outputs=table)
+
+
+demo.launch()

auth.py

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+import bcrypt
+from db import users_collection
+
+def signup(username, password, role):
+
+    hashed = bcrypt.hashpw(password.encode(), bcrypt.gensalt())
+
+    user = {
+        "username": username,
+        "password": hashed,
+        "role": role
+    }
+
+    users_collection.insert_one(user)
+
+    return "Signup Successful"
+
+
+def login(username, password):
+
+    user = users_collection.find_one({"username": username})
+
+    if user and bcrypt.checkpw(password.encode(), user["password"]):
+        return user["role"]
+
+    return None

certificate_ai.py

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+import pdfplumber
+from openai import OpenAI
+import os
+from dotenv import load_dotenv
+load_dotenv()
+
+client = OpenAI(base_url="https://openrouter.ai/api/v1", api_key=os.getenv("key"))
+
+def read_pdf(pdf_file):
+
+    text = ""
+
+    with pdfplumber.open(pdf_file) as pdf:
+        for page in pdf.pages:
+            text += page.extract_text()
+
+    return text
+
+
+def verify_certificate(text):
+
+    prompt = f"""
+    Analyze this internship certificate text and determine if it looks fake or genuine.
+    Return only: Fake or Genuine.
+
+    Certificate:
+    {text}
+    """
+
+    response = client.chat.completions.create(
+        model="z-ai/glm-4.5-air:free",
+        messages=[{"role":"user","content":prompt}]
+    )
+
+    return response.choices[0].message.content

db.py

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+from pymongo import MongoClient
+
+MONGO_URI = "mongodb+srv://KavinTharanika:Tharakavin0114@cluster0.rqic8gp.mongodb.net/?retryWrites=true&w=majority"
+
+client = MongoClient(MONGO_URI)
+
+db = client["certificate_system"]
+
+users_collection = db["users"]
+cert_collection = db["certificates"]

requirements.txt

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+gradio 
+pymongo 
+pdfplumber 
+openai 
+bcrypt 
+python-dotenv