Music Extension Callbacks

from flask import Flask, request, jsonify
import requests
import os

app = Flask(__name__)

@app.route('/suno-extend-callback', methods=['POST'])
def handle_callback():
    data = request.json
    
    code = data.get('code')
    msg = data.get('msg')
    callback_data = data.get('data', {})
    callback_type = callback_data.get('callbackType')
    task_id = callback_data.get('task_id')
    tracks = callback_data.get('data', [])
    
    print(f"Received Suno music extension callback:")
    print(f"Task ID: {task_id}, Type: {callback_type}")
    print(f"Status: {code}, Message: {msg}")
    
    if code == 200:
        # Task progressed or completed successfully
        print(f"Callback type: {callback_type}")
        print(f"Number of tracks: {len(tracks)}")
        
        if callback_type == 'text':
            print("Text generation completed, waiting for audio...")
        elif callback_type == 'first':
            print("First track completed, processing remaining tracks...")
            download_tracks(tracks, task_id)
        elif callback_type == 'complete':
            print("All tracks completed successfully!")
            download_tracks(tracks, task_id)
            
    else:
        # Task failed
        print(f"Suno music extension failed: {msg}")
        
        # Handle specific error types
        if code == 400:
            print("Validation error - check for copyrighted content")
        elif code == 408:
            print("Rate limited - please wait before retrying")
        elif code == 413:
            print("Content conflict - audio matches existing work")
        elif code == 501:
            print("Generation failed - may need to adjust parameters")
        elif code == 531:
            print("Server error with credit refund - safe to retry")
    
    # Return 200 status code to confirm callback received
    return jsonify({'status': 'received'}), 200

def download_tracks(tracks, task_id):
    """Download audio tracks and cover images"""
    for i, track in enumerate(tracks):
        track_id = track.get('id')
        audio_url = track.get('audio_url')
        image_url = track.get('image_url')
        title = track.get('title')
        duration = track.get('duration')
        
        print(f"Track {i + 1}: {title} ({duration}s)")
        
        # Download audio file
        if audio_url:
            try:
                audio_filename = f"suno_extend_{task_id}_{track_id}.mp3"
                download_file(audio_url, audio_filename)
                print(f"Audio downloaded: {track_id}")
            except Exception as e:
                print(f"Audio download failed for {track_id}: {e}")
        
        # Download cover image
        if image_url:
            try:
                image_filename = f"suno_cover_{task_id}_{track_id}.jpeg"
                download_file(image_url, image_filename)
                print(f"Cover downloaded: {track_id}")
            except Exception as e:
                print(f"Cover download failed for {track_id}: {e}")

def download_file(url, filename):
    """Download file from URL and save locally"""
    response = requests.get(url, stream=True)
    response.raise_for_status()
    
    os.makedirs('downloads', exist_ok=True)
    filepath = os.path.join('downloads', filename)
    
    with open(filepath, 'wb') as f:
        for chunk in response.iter_content(chunk_size=8192):
            f.write(chunk)

if __name__ == '__main__':
    app.run(host='0.0.0.0', port=3000)

<?php
header('Content-Type: application/json');

// Get POST data
$input = file_get_contents('php://input');
$data = json_decode($input, true);

$code = $data['code'] ?? null;
$msg = $data['msg'] ?? '';
$callbackData = $data['data'] ?? [];
$callbackType = $callbackData['callbackType'] ?? '';
$taskId = $callbackData['task_id'] ?? '';
$tracks = $callbackData['data'] ?? [];

error_log("Received Suno music extension callback:");
error_log("Task ID: $taskId, Type: $callbackType");
error_log("Status: $code, Message: $msg");

if ($code === 200) {
    // Task progressed or completed successfully
    error_log("Callback type: $callbackType");
    error_log("Number of tracks: " . count($tracks));
    
    switch ($callbackType) {
        case 'text':
            error_log("Text generation completed, waiting for audio...");
            break;
            
        case 'first':
            error_log("First track completed, processing remaining tracks...");
            downloadTracks($tracks, $taskId);
            break;
            
        case 'complete':
            error_log("All tracks completed successfully!");
            downloadTracks($tracks, $taskId);
            break;
    }
    
} else {
    // Task failed
    error_log("Suno music extension failed: $msg");
    
    // Handle specific error types
    if ($code === 400) {
        error_log("Validation error - check for copyrighted content");
    } elseif ($code === 408) {
        error_log("Rate limited - please wait before retrying");
    } elseif ($code === 413) {
        error_log("Content conflict - audio matches existing work");
    } elseif ($code === 501) {
        error_log("Generation failed - may need to adjust parameters");
    } elseif ($code === 531) {
        error_log("Server error with credit refund - safe to retry");
    }
}

// Return 200 status code to confirm callback received
http_response_code(200);
echo json_encode(['status' => 'received']);

function downloadTracks($tracks, $taskId) {
    foreach ($tracks as $i => $track) {
        $trackId = $track['id'] ?? '';
        $audioUrl = $track['audio_url'] ?? '';
        $imageUrl = $track['image_url'] ?? '';
        $title = $track['title'] ?? '';
        $duration = $track['duration'] ?? 0;
        
        error_log("Track " . ($i + 1) . ": $title ({$duration}s)");
        
        // Download audio file
        if (!empty($audioUrl)) {
            try {
                $audioFilename = "suno_extend_{$taskId}_{$trackId}.mp3";
                downloadFile($audioUrl, $audioFilename);
                error_log("Audio downloaded: $trackId");
            } catch (Exception $e) {
                error_log("Audio download failed for $trackId: " . $e->getMessage());
            }
        }
        
        // Download cover image
        if (!empty($imageUrl)) {
            try {
                $imageFilename = "suno_cover_{$taskId}_{$trackId}.jpeg";
                downloadFile($imageUrl, $imageFilename);
                error_log("Cover downloaded: $trackId");
            } catch (Exception $e) {
                error_log("Cover download failed for $trackId: " . $e->getMessage());
            }
        }
    }
}

function downloadFile($url, $filename) {
    $downloadDir = 'downloads';
    if (!is_dir($downloadDir)) {
        mkdir($downloadDir, 0755, true);
    }
    
    $filepath = $downloadDir . '/' . $filename;
    
    $fileContent = file_get_contents($url);
    if ($fileContent === false) {
        throw new Exception("Failed to download file from URL");
    }
    
    $result = file_put_contents($filepath, $fileContent);
    if ($result === false) {
        throw new Exception("Failed to save file locally");
    }
}
?>