app.py

import gradio as gr
import yt_dlp
import os
import tempfile
import shutil
from pathlib import Path
import re
import uuid
session_data = {}

class YouTubeDownloader:
    def __init__(self):
        self.download_dir = tempfile.mkdtemp()

    def is_valid_youtube_url(self, url):
        youtube_regex = re.compile(
            r'(https?://)?(www\.)?(youtube|youtu|youtube-nocookie)\.(com|be)/'
            r'(watch\?v=|embed/|v/|.+\?v=)?([^&=%\?]{11})'
        )
        return youtube_regex.match(url) is not None

    def format_video_info(self, video_info):
        """Format video information into a readable report"""
        if not video_info:
            return "❌ No video information available."
        
        # Format duration
        duration = video_info.get('duration', 0)
        duration_str = f"{duration//3600}:{(duration%3600)//60:02d}:{duration%60:02d}" if duration else "Unknown"
        
        # Format upload date
        upload_date = video_info.get('upload_date', '')
        if upload_date and len(upload_date) == 8:
            formatted_date = f"{upload_date[:4]}-{upload_date[4:6]}-{upload_date[6:8]}"
        else:
            formatted_date = upload_date or "Unknown"
        
        # Format numbers
        def format_number(num):
            if num >= 1_000_000:
                return f"{num/1_000_000:.1f}M"
            elif num >= 1_000:
                return f"{num/1_000:.1f}K"
            else:
                return str(num)
        
        # Build the report
        report = f"""
📹 VIDEO ANALYSIS REPORT
{'='*50}

📝 BASIC INFORMATION:
• Title: {video_info.get('title', 'Unknown')}
• Channel: {video_info.get('channel', 'Unknown')}
• Uploader: {video_info.get('uploader', 'Unknown')}
• Upload Date: {formatted_date}
• Duration: {duration_str}

📊 STATISTICS:
• Views: {format_number(video_info.get('view_count', 0))}
• Likes: {format_number(video_info.get('like_count', 0))}
• Comments: {format_number(video_info.get('comment_count', 0))}
• Channel Followers: {format_number(video_info.get('channel_followers', 0))}

🏷️ CATEGORIES & TAGS:
• Categories: {', '.join(video_info.get('categories', [])) or 'None'}
• Tags: {', '.join(video_info.get('tags', [])[:10]) or 'None'}
{('• More tags...' if len(video_info.get('tags', [])) > 10 else '')}

📖 DESCRIPTION:
{video_info.get('description', 'No description available')[:500]}
{'...' if len(video_info.get('description', '')) > 500 else ''}

🔗 VIDEO URL:
{video_info.get('webpage_url', 'Unknown')}
        """
        
        return report.strip()

    def get_video_info(self, url, progress=gr.Progress(), cookiefile=None):
        if not url or not url.strip():
            return None, "❌ Please enter a YouTube URL"

        if not self.is_valid_youtube_url(url):
            return None, "❌ Invalid YouTube URL. Please enter a valid YouTube video URL"

        try:
            progress(0.2, desc="Fetching video information...")
            ydl_opts = {
                'noplaylist': True,
                'extract_flat': False,
            }
            if cookiefile:
                ydl_opts['cookiefile'] = cookiefile

            with yt_dlp.YoutubeDL(ydl_opts) as ydl:
                try:
                    info = ydl.extract_info(url, download=False)
                    video_info = {
                        'title': info.get('title', 'Unknown'),
                        'description': info.get('description', 'No description available'),
                        'duration': info.get('duration', 0),
                        'view_count': info.get('view_count', 0),
                        'like_count': info.get('like_count', 0),
                        'comment_count': info.get('comment_count', 0),
                        'upload_date': info.get('upload_date', ''),
                        'uploader': info.get('uploader', 'Unknown'),
                        'channel': info.get('channel', 'Unknown'),
                        'channel_followers': info.get('channel_follower_count', 0),
                        'tags': info.get('tags', []),
                        'categories': info.get('categories', []),
                        'thumbnail': info.get('thumbnail', ''),
                        'webpage_url': info.get('webpage_url', url)
                    }
                    progress(1.0, desc="Information retrieved!")
                    return video_info, "✅ Video information retrieved successfully"
                except yt_dlp.DownloadError as e:
                    error_msg = str(e)
                    if "Video unavailable" in error_msg:
                        return None, "❌ Video is unavailable or private"
                    elif "age-restricted" in error_msg.lower():
                        return None, "❌ Video is age-restricted"
                    else:
                        return None, f"❌ Failed to get video info: {error_msg}"
        except Exception as e:
            return None, f"❌ An unexpected error occurred: {str(e)}"

    def download_video(self, url, progress=gr.Progress(), cookiefile=None):
        if not url or not url.strip():
            return None, "❌ Please enter a YouTube URL"

        if not self.is_valid_youtube_url(url):
            return None, "❌ Invalid YouTube URL. Please enter a valid YouTube video URL"

        try:
            progress(0.1, desc="Initializing download...")
            ydl_opts = {
                'format': 'best[ext=mp4]/best',
                'outtmpl': os.path.join(self.download_dir, '%(title)s.%(ext)s'),
                'noplaylist': True,
            }
            if cookiefile:
                ydl_opts['cookiefile'] = cookiefile

            progress(0.3, desc="Fetching video information...")
            with yt_dlp.YoutubeDL(ydl_opts) as ydl:
                try:
                    info = ydl.extract_info(url, download=False)
                    video_title = info.get('title', 'Unknown')
                    duration = info.get('duration', 0)
                    progress(0.5, desc=f"Downloading: {video_title[:50]}...")
                    ydl.download([url])
                    progress(0.9, desc="Finalizing download...")
                    downloaded_files = list(Path(self.download_dir).glob('*'))
                    if downloaded_files:
                        downloaded_file = downloaded_files[0]
                        file_size = downloaded_file.stat().st_size / (1024 * 1024)
                        progress(1.0, desc="Download completed!")
                        success_message = f"✅ Successfully downloaded: {video_title}\n"
                        success_message += f"📁 File size: {file_size:.1f} MB\n"
                        success_message += f"⏱️ Duration: {duration//60}:{duration%60:02d}" if duration else ""
                        return str(downloaded_file), success_message
                    else:
                        return None, "❌ Download completed but file not found"
                except yt_dlp.DownloadError as e:
                    error_msg = str(e)
                    if "Video unavailable" in error_msg:
                        return None, "❌ Video is unavailable or private"
                    elif "age-restricted" in error_msg.lower():
                        return None, "❌ Video is age-restricted and cannot be downloaded"
                    elif "copyright" in error_msg.lower():
                        return None, "❌ Video cannot be downloaded due to copyright restrictions"
                    else:
                        return None, f"❌ Download failed: {error_msg}"
        except Exception as e:
            return None, f"❌ An unexpected error occurred: {str(e)}"

    def cleanup(self):
        try:
            shutil.rmtree(self.download_dir, ignore_errors=True)
        except:
            pass

downloader = YouTubeDownloader()

def create_interface():
    with gr.Blocks(title="YouTube Video Downloader & Analyzer") as demo:
        url_input = gr.Textbox(label="YouTube URL", placeholder="https://www.youtube.com/watch?v=...")
        cookies_input = gr.File(label="Upload cookies.txt (optional)", type="filepath", file_types=[".txt"])
        download_btn = gr.Button("Download Video")
        status_output = gr.Textbox(label="Download Status")
        file_output = gr.File(label="Downloaded Video", visible=False)
        analysis_btn = gr.Button("Show Analysis Results", visible=False)
        analysis_output = gr.Textbox(label="Video Analysis Results", visible=False, lines=20)
        video_info_state = gr.Textbox(value=False)
        

        def handle_download(url, cookies_path):
            if not url or not url.strip():
                return "Please enter a YouTube URL", gr.File(visible=False), gr.Button(visible=False), None

            cookiefile = cookies_path.strip() if cookies_path and os.path.exists(cookies_path.strip()) else None
            video_info, info_message = downloader.get_video_info(url, cookiefile=cookiefile)
            file_path, download_message = downloader.download_video(url, cookiefile=cookiefile)
            print(f"[DEBUG] Download message: {download_message}")

            if file_path and video_info:
                success_message = f"{download_message}\n\nVideo downloaded successfully! Click 'Show Analysis Results' to see detailed information."
                return success_message, gr.File(value=file_path, visible=True), gr.Button(visible=True), gr.State(video_info)
            elif file_path:
                return f"{download_message}\n\nVideo downloaded but analysis data unavailable.", gr.File(value=file_path, visible=True), gr.Button(visible=False), gr.State("")
            else:
                return f"❌ Download failed:\n{download_message}", gr.File(visible=False), gr.Button(visible=False), gr.State(None)

        def show_analysis(video_info):
            print("[DEBUG] Received session_id:", session_id)
            video_info = session_data.get(session_id)
            if video_info:
                return downloader.format_video_info(video_info), gr.Textbox(visible=True)
            return "❌ No analysis data available.", gr.Textbox(visible=True)

        download_btn.click(handle_download, inputs=[url_input, cookies_input], outputs=[status_output, file_output, analysis_btn, video_info_state])
        analysis_btn.click(show_analysis, inputs=[video_info_state], outputs=[analysis_output])
        url_input.submit(handle_download, inputs=[url_input, cookies_input], outputs=[status_output, file_output, analysis_btn, video_info_state])

    return demo

if __name__ == "__main__":
    demo = create_interface()
    import atexit
    atexit.register(downloader.cleanup)
    demo.launch()