Create app.py

app.py

@@ -0,0 +1,112 @@
+import gradio as gr
+import sqlite3
+import datetime
+
+# Create or connect to the database
+conn = sqlite3.connect("attendance.db")
+c = conn.cursor()
+
+# Create necessary tables
+c.execute('''CREATE TABLE IF NOT EXISTS users (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                username TEXT UNIQUE,
+                password TEXT,
+                role TEXT,
+                device_id TEXT
+            )''')
+
+c.execute('''CREATE TABLE IF NOT EXISTS attendance (
+                id INTEGER PRIMARY KEY AUTOINCREMENT,
+                username TEXT,
+                date TEXT,
+                time TEXT,
+                session TEXT
+            )''')
+conn.commit()
+
+# Auth functions
+def register_user(username, password, role):
+    try:
+        c.execute("INSERT INTO users (username, password, role) VALUES (?, ?, ?)", (username, password, role))
+        conn.commit()
+        return "User registered successfully."
+    except sqlite3.IntegrityError:
+        return "Username already exists."
+
+def login_user(username, password):
+    c.execute("SELECT * FROM users WHERE username=? AND password=?", (username, password))
+    return c.fetchone()
+
+def set_device(username, device_id):
+    c.execute("UPDATE users SET device_id=? WHERE username=?", (device_id, username))
+    conn.commit()
+    return "Device registered."
+
+def check_device(username, device_id):
+    c.execute("SELECT device_id FROM users WHERE username=?", (username,))
+    result = c.fetchone()
+    return result and result[0] == device_id
+
+# Attendance marking
+def mark_attendance(username, session):
+    date = datetime.date.today().isoformat()
+    time = datetime.datetime.now().strftime("%H:%M:%S")
+    c.execute("INSERT INTO attendance (username, date, time, session) VALUES (?, ?, ?, ?)", (username, date, time, session))
+    conn.commit()
+    return f"Attendance marked at {time} for session: {session}"
+
+# View attendance dashboard
+def view_attendance():
+    c.execute("SELECT * FROM attendance ORDER BY date DESC, time DESC")
+    records = c.fetchall()
+    return "\n".join([f"{r[1]} | {r[2]} | {r[3]} | {r[4]}" for r in records])
+
+# Gradio UI
+with gr.Blocks() as app:
+    gr.Markdown("# Attendance System (No Firebase)")
+
+    with gr.Tab("Register"):
+        reg_username = gr.Text(label="Username")
+        reg_password = gr.Text(label="Password", type="password")
+        reg_role = gr.Radio(["teacher", "student"], label="Role")
+        reg_button = gr.Button("Register")
+        reg_output = gr.Textbox(label="Result")
+        reg_button.click(fn=register_user, inputs=[reg_username, reg_password, reg_role], outputs=reg_output)
+
+    with gr.Tab("Login & Mark Attendance"):
+        log_username = gr.Text(label="Username")
+        log_password = gr.Text(label="Password", type="password")
+        log_device = gr.Text(label="Device ID")
+        session_input = gr.Text(label="Session ID")
+        login_button = gr.Button("Login & Mark")
+        login_output = gr.Textbox(label="Result")
+
+        def login_and_mark(username, password, device_id, session):
+            user = login_user(username, password)
+            if not user:
+                return "Login failed."
+            if not user[4]:
+                set_device(username, device_id)
+                return mark_attendance(username, session)
+            elif check_device(username, device_id):
+                return mark_attendance(username, session)
+            else:
+                return "Unauthorized device."
+
+        login_button.click(fn=login_and_mark, inputs=[log_username, log_password, log_device, session_input], outputs=login_output)
+
+    with gr.Tab("Dashboard (Teacher Only)"):
+        dash_username = gr.Text(label="Teacher Username")
+        dash_password = gr.Text(label="Password", type="password")
+        dash_button = gr.Button("View Attendance")
+        dash_output = gr.Textbox(label="Attendance Records", lines=20)
+
+        def dashboard(username, password):
+            user = login_user(username, password)
+            if user and user[3] == "teacher":
+                return view_attendance()
+            return "Access denied."
+
+        dash_button.click(fn=dashboard, inputs=[dash_username, dash_password], outputs=dash_output)
+
+app.launch()