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app.py

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+import streamlit as st
+import time
+import os
+import random
+from PIL import Image
+from pathlib import Path
+import base64
+
+# Page configuration
+st.set_page_config(page_title="🪖 PPDT Test Simulator", layout="centered", initial_sidebar_state="collapsed")
+
+# Custom CSS styling
+st.markdown("""
+    <style>
+    .centered {
+        display: flex;
+        justify-content: center;
+        align-items: center;
+        height: 80vh;
+        font-size: 2rem;
+        color: white;
+        background-color: black;
+        border-radius: 10px;
+    }
+    .button-style {
+        width: 100%;
+        font-size: 18px;
+        padding: 10px;
+        border-radius: 8px;
+    }
+    </style>
+""", unsafe_allow_html=True)
+
+# Helper function to show full screen image
+def show_fullscreen_image(img_path, duration, caption=""):
+    image = Image.open(img_path)
+    st.image(image, use_column_width=True, caption=caption)
+    time.sleep(duration)
+    st.empty()
+
+# Play audio using base64 encoding
+def play_audio(file_path):
+    with open(file_path, "rb") as f:
+        audio_bytes = f.read()
+    audio_b64 = base64.b64encode(audio_bytes).decode()
+    audio_html = f"""
+        <audio autoplay>
+            <source src="data:audio/mp3;base64,{audio_b64}" type="audio/mp3">
+        </audio>
+    """
+    st.markdown(audio_html, unsafe_allow_html=True)
+
+# Show black screen with a message
+def show_black_screen(message, duration):
+    st.markdown(f"<div class='centered'>{message}</div>", unsafe_allow_html=True)
+    time.sleep(duration)
+    st.empty()
+
+# Title
+st.markdown("<h1 style='text-align: center;'>🪖 PPDT Test Simulator</h1>", unsafe_allow_html=True)
+st.markdown("<h4 style='text-align: center;'>Simulate Real-Time Picture Perception and Discussion Test</h4>", unsafe_allow_html=True)
+st.write("")
+
+# Main Buttons
+col1, col2 = st.columns(2)
+with col1:
+    show_instruction = st.button("📘 Show Instructions", type="primary")
+with col2:
+    start_test = st.button("🚩 Start New PPDT", type="primary")
+
+# === Instructions Flow ===
+if show_instruction:
+    st.info("🔍 Showing Instruction Page 1...")
+    show_fullscreen_image("images/instr1.jpg", 30, "Instruction Page 1 (30 seconds)")
+
+    st.info("🔍 Showing Instruction Page 2...")
+    show_fullscreen_image("images/instr2.jpg", 30, "Instruction Page 2 (30 seconds)")
+
+    st.success("✅ Instructions Complete! You're ready for the test.")
+
+# === Test Flow ===
+if start_test:
+    st.warning("🕒 Get Ready... Test will begin shortly.")
+    time.sleep(5)
+
+    # Load random image from test image folder
+    image_folder = "images"
+    test_images = [f for f in os.listdir(image_folder) if f.lower().endswith((".jpg", ".png")) and "test" in f.lower()]
+    selected_image = random.choice(test_images)
+
+    # Show PPDT image
+    st.info("📸 Observe the image carefully...")
+    show_fullscreen_image(os.path.join(image_folder, selected_image), 20, "Observe for 20 seconds")
+
+    # Black screen for 30 seconds
+    show_black_screen("🧠 Think and prepare your story...", 30)
+    play_audio("sounds/bell1.mp3")
+
+    # Writing time: 4 minutes
+    show_black_screen("📝 Write your story now (4 minutes)...", 240)
+    play_audio("sounds/bell2.mp3")
+
+    st.balloons()
+    st.success("🎯 Test Finished! Well done, candidate!")
+

requirements.txt

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+streamlit>=1.32.0
+Pillow>=10.0.0

script.py

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+import os
+
+# === Settings ===
+folder_path = "pics"  # Change this if your folder is named differently
+file_extensions = (".jpg", ".jpeg", ".png")
+
+# === Rename Logic ===
+def rename_images_in_folder(path):
+    files = [f for f in os.listdir(path) if f.lower().endswith(file_extensions)]
+    files.sort()  # Optional: Ensures consistent order
+
+    for idx, filename in enumerate(files, start=1):
+        extension = os.path.splitext(filename)[1]
+        new_name = f"test{idx}{extension.lower()}"
+        src = os.path.join(path, filename)
+        dst = os.path.join(path, new_name)
+        os.rename(src, dst)
+        print(f"Renamed: {filename} → {new_name}")
+
+    print("\n✅ Renaming complete!")
+
+# === Run Script ===
+if __name__ == "__main__":
+    rename_images_in_folder(folder_path)