api.php

<?php
header('Content-Type: application/json');
header('Access-Control-Allow-Origin: *');

$action = $_GET['action'] ?? '';

switch ($action) {
    case 'info':
        getVideoInfo();
        break;
    case 'search':
        searchYouTube();
        break;
    case 'spotify':
        importSpotifyPlaylist();
        break;
    default:
        echo json_encode(['error' => 'Unknown action']);
}

function getVideoInfo() {
    $url = $_GET['url'] ?? '';
    $id = extractYoutubeId($url);
    
    if (!$id) {
        echo json_encode(['error' => 'Invalid YouTube URL']);
        return;
    }

    $oembed = "https://www.youtube.com/oembed?url=https://www.youtube.com/watch?v={$id}&format=json";
    $context = stream_context_create(['http' => ['timeout' => 10]]);
    $data = @file_get_contents($oembed, false, $context);
    
    if ($data) {
        $info = json_decode($data, true);
        echo json_encode([
            'id' => $id,
            'title' => $info['title'] ?? 'Unknown Title',
            'author' => $info['author_name'] ?? 'Unknown Artist',
            'thumbnail' => "https://img.youtube.com/vi/{$id}/maxresdefault.jpg",
            'duration' => getDuration($id)
        ]);
    } else {
        echo json_encode([
            'id' => $id,
            'title' => 'Unknown Title',
            'author' => 'Unknown Artist',
            'thumbnail' => "https://img.youtube.com/vi/{$id}/maxresdefault.jpg",
            'duration' => 0
        ]);
    }
}

function getDuration($id) {
    $url = "https://www.youtube.com/watch?v={$id}";
    $context = stream_context_create(['http' => ['timeout' => 5]]);
    $html = @file_get_contents($url, false, $context);
    
    if ($html && preg_match('/"approxDurationMs":"(\d+)"/', $html, $m)) {
        return intval($m[1]) / 1000;
    }
    return 0;
}

function searchYouTube() {
    $q = $_GET['q'] ?? '';
    if (!$q) {
        echo json_encode(['error' => 'No search query']);
        return;
    }

    $query = urlencode($q);
    $url = "https://www.youtube.com/results?search_query={$query}";
    $context = stream_context_create([
        'http' => [
            'timeout' => 6,
            'header' => "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36\r\n"
        ]
    ]);
    
    $html = @file_get_contents($url, false, $context);
    $results = [];

    if ($html) {
        preg_match_all('/\/watch\?v=([a-zA-Z0-9_-]{11})/', $html, $matches);
        $ids = array_unique($matches[1]);
        $titles = [];
        $authors = [];
        
        preg_match_all('/"title":{"runs":\[{"text":"([^"]+)"}\]}/', $html, $titleMatches);
        if (!empty($titleMatches[1])) {
            $titles = $titleMatches[1];
        }

        preg_match_all('/"author":{"name":"([^"]+)"/', $html, $authorMatches);
        if (!empty($authorMatches[1])) {
            $authors = $authorMatches[1];
        }

        foreach ($ids as $i => $id) {
            if ($i >= 15) break;
            $results[] = [
                'id' => $id,
                'title' => $titles[$i] ?? "Video {$id}",
                'author' => $authors[$i] ?? '',
                'thumbnail' => "https://img.youtube.com/vi/{$id}/default.jpg"
            ];
        }
    }

    echo json_encode($results);
}

function extractYoutubeId($url) {
    $patterns = [
        '/youtube\.com\/watch\?v=([a-zA-Z0-9_-]{11})/',
        '/youtu\.be\/([a-zA-Z0-9_-]{11})/',
        '/youtube\.com\/embed\/([a-zA-Z0-9_-]{11})/',
        '/youtube\.com\/shorts\/([a-zA-Z0-9_-]{11})/'
    ];

    foreach ($patterns as $pattern) {
        if (preg_match($pattern, $url, $matches)) {
            return $matches[1];
        }
    }
    
    if (preg_match('/^[a-zA-Z0-9_-]{11}$/', $url)) {
        return $url;
    }
    
    return null;
}

/* ========== SPOTIFY PLAYLIST IMPORT (via embed) ========== */

function importSpotifyPlaylist() {
    $input = $_GET['url'] ?? '';

    $playlistId = extractSpotifyId($input);
    if (!$playlistId) {
        echo json_encode(['error' => 'Link/embed Spotify playlist tidak valid']);
        return;
    }

    $tracks = fetchEmbedTracks($playlistId);
    if ($tracks === null) {
        echo json_encode(['error' => 'Gagal mengambil data dari Spotify']);
        return;
    }
    if (empty($tracks)) {
        echo json_encode(['error' => 'Tidak ada track ditemukan']);
        return;
    }

    // Ambil max 20, kirim nama+artist doang
    $tracks = array_slice($tracks, 0, 20);
    $results = array_map(fn($t) => ['name' => $t['name'], 'artist' => $t['artist']], $tracks);

    echo json_encode($results);
}

function extractSpotifyId($input) {
    // Format: open.spotify.com/playlist/ID
    if (preg_match('/spotify\.com\/playlist\/([a-zA-Z0-9]+)/', $input, $m)) return $m[1];
    // Format: spotify:playlist:ID
    if (preg_match('/spotify:playlist:([a-zA-Z0-9]+)/', $input, $m)) return $m[1];
    // ID mentah
    if (preg_match('/^[a-zA-Z0-9]{22}$/', trim($input), $m)) return trim($input);
    return null;
}

function fetchEmbedTracks($playlistId) {
    $url = "https://open.spotify.com/embed/playlist/{$playlistId}";
    $context = stream_context_create([
        'http' => [
            'header'  => "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36\r\nAccept-Language: en-US,en;q=0.9\r\n",
            'timeout' => 15,
        ]
    ]);

    $html = @file_get_contents($url, false, $context);
    if (!$html) return null;

    // Strategy 1: Cari data JSON di script tag
    preg_match_all('/<script[^>]*>(.*?)<\/script>/s', $html, $scriptMatches);
    foreach ($scriptMatches[1] as $script) {
        $script = trim($script);
        // Coba parse sebagai JSON langsung
        if (strpos($script, '{') === 0 || strpos($script, '[') === 0) {
            $data = @json_decode($script, true);
            if ($data) {
                $found = digTracks($data);
                if (!empty($found)) return $found;
            }
        }
        // Coba format: window.__INITIAL_STATE__ = {...}
        if (preg_match('/window\.__PRELOADED_STATE__\s*=\s*({.*?});/s', $script, $sm)) {
            $data = @json_decode($sm[1], true);
            if ($data && ($found = digTracks($data))) return $found;
        }
    }

    // Strategy 2: Cari pola "title":"...","subtitle":"..." di HTML
    $tracks = [];
    if (preg_match_all('/"title"\s*:\s*"((?:[^"\\\\]|\\\\.)*)"\s*,\s*"subtitle"\s*:\s*"((?:[^"\\\\]|\\\\.)*)"/', $html, $matches, PREG_SET_ORDER)) {
        foreach ($matches as $m) {
            $name = json_decode('"' . $m[1] . '"');
            $artist = json_decode('"' . $m[2] . '"');
            if ($name && $artist) {
                $tracks[] = ['name' => $name, 'artist' => $artist];
            }
        }
        if (!empty($tracks)) return $tracks;
    }

    // Strategy 3: Cari JSON array di dalam script dengan keyword "track"
    if (preg_match('/\[.*?"name".*?"artists".*?\]/s', $html, $jm)) {
        $data = @json_decode($jm[0], true);
        if ($data && ($found = digTracks($data))) return $found;
    }

    return [];
}

function digTracks($data) {
    $tracks = [];

    // Langsung ketemu track
    if (isset($data['name'], $data['artists'][0]['name'])) {
        return [['name' => $data['name'], 'artist' => $data['artists'][0]['name']]];
    }

    if (is_array($data)) {
        foreach ($data as $key => $value) {
            if (is_array($value)) {
                // Cek apakah item ini adalah track
                if (isset($value['track']['name'], $value['track']['artists'][0]['name'])) {
                    $tracks[] = ['name' => $value['track']['name'], 'artist' => $value['track']['artists'][0]['name']];
                } elseif (isset($value['name'], $value['artists'][0]['name'])) {
                    $tracks[] = ['name' => $value['name'], 'artist' => $value['artists'][0]['name']];
                } elseif (is_int($key)) {
                    // Array numerik — telusuri lebih dalam
                    $sub = digTracks($value);
                    $tracks = array_merge($tracks, $sub);
                } else {
                    // Cari di level ini
                    $sub = digTracks($value);
                    if (!empty($sub)) {
                        $tracks = array_merge($tracks, $sub);
                        if (count($tracks) > 30) break;
                    }
                }
            }
        }
    }

    return $tracks;
}

function searchYoutubeFirst($query) {
    $q = urlencode($query);
    $url = "https://www.youtube.com/results?search_query={$q}";
    $context = stream_context_create([
        'http' => [
            'timeout' => 5,
            'header'  => "User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36\r\n"
        ]
    ]);

    $html = @file_get_contents($url, false, $context);
    if (!$html) return null;

    if (preg_match('/\/watch\?v=([a-zA-Z0-9_-]{11})/', $html, $m)) {
        return $m[1];
    }
    return null;
}