radio/api/nowplaying.php

<?php
/**
 * api/nowplaying.php
 * ------------------
 * Fetches the station's current metadata from whatever backend the operator
 * uses (Icecast, AzuraCast, Shoutcast, or a custom JSON feed) and returns a
 * single normalized shape the browser can rely on:
 *
 *   {
 *     "online":         true|false,
 *     "artist":         "…",
 *     "title":          "…",
 *     "album":          "…",
 *     "art":            "…" | "",     // empty if the provider has no art
 *     "listeners":      12 | null,
 *     "listeners_peak": 34 | null
 *   }
 *
 * Doing this server-side avoids browser CORS problems and hides internal
 * backend addresses (e.g. 127.0.0.1 / LAN IPs) from visitors.
 */

require_once __DIR__ . '/_bootstrap.php';

$provider = cfg('nowplaying.provider');
$url      = cfg('nowplaying.url');
$timeout  = cfg('nowplaying.timeout');
$delim    = cfg('nowplaying.delimiter');

$out = [
    'online'         => false,
    'artist'         => '',
    'title'          => '',
    'album'          => '',
    'art'            => '',
    'listeners'      => null,
    'listeners_peak' => null,
];

/** Remove configured junk (e.g. " (Remastered)", ".mp3") from a string. */
function clean_str($s) {
    $patterns = cfg('nowplaying.cleanup');
    if (empty($patterns)) return trim($s);
    $isRegex = cfg('nowplaying.cleanup_is_regex');
    foreach ($patterns as $p) {
        if ($p === '') continue;
        if ($isRegex) {
            $out = @preg_replace('/' . str_replace('/', '\\/', $p) . '/i', '', $s);
            if ($out !== null) $s = $out; // ignore invalid patterns
        } else {
            $s = str_ireplace($p, '', $s);
        }
    }
    return trim($s);
}

/** Split "Artist <delim> Title" into [artist, title]. */
function split_title($combined, $delim) {
    $combined = trim((string) $combined);
    if ($combined === '') return ['', ''];
    if ($delim !== '' && strpos($combined, $delim) !== false) {
        $parts = explode($delim, $combined, 2);
        return [trim($parts[0]), trim($parts[1])];
    }
    // No delimiter found — treat the whole thing as the title.
    return ['', $combined];
}

$raw = http_get($url, $timeout);
if ($raw === null) {
    json_out($out); // backend unreachable -> offline
}
$data = json_decode($raw, true);
if (!is_array($data)) {
    json_out($out);
}

switch ($provider) {

    /* --------------------------------------------------------------- */
    case 'azuracast':
        $np = $data['now_playing'] ?? [];
        $song = $np['song'] ?? [];
        $out['artist'] = (string) ($song['artist'] ?? '');
        $out['title']  = (string) ($song['title']  ?? '');
        $out['album']  = (string) ($song['album']  ?? '');
        $out['art']    = (string) ($song['art']    ?? '');
        if ($out['artist'] === '' && $out['title'] === '' && !empty($song['text'])) {
            [$out['artist'], $out['title']] = split_title($song['text'], $delim);
        }
        $out['listeners']      = isset($data['listeners']['current']) ? (int) $data['listeners']['current'] : null;
        $out['listeners_peak'] = isset($data['listeners']['total'])   ? (int) $data['listeners']['total']   : null;
        $out['online'] = !empty($data['is_online']) && ($out['title'] !== '' || $out['artist'] !== '');
        break;

    /* --------------------------------------------------------------- */
    case 'shoutcast':
        $combined = $data['streamtitle'] ?? $data['songtitle'] ?? '';
        [$out['artist'], $out['title']] = split_title($combined, $delim);
        $out['listeners']      = isset($data['currentlisteners']) ? (int) $data['currentlisteners'] : null;
        $out['listeners_peak'] = isset($data['peaklisteners'])    ? (int) $data['peaklisteners']    : null;
        $out['online'] = ($out['title'] !== '' || $out['artist'] !== '');
        break;

    /* --------------------------------------------------------------- */
    case 'custom':
        $c = cfg('nowplaying.custom');
        if (!empty($c['title_combined'])) {
            [$out['artist'], $out['title']] = split_title(dot_get($data, $c['title_combined'], ''), $delim);
        } else {
            $out['artist'] = (string) dot_get($data, $c['artist'], '');
            $out['title']  = (string) dot_get($data, $c['title'], '');
        }
        $out['album']     = (string) dot_get($data, $c['album'], '');
        $out['art']       = (string) dot_get($data, $c['art'], '');
        $listeners        = dot_get($data, $c['listeners'], null);
        $out['listeners'] = ($listeners === null) ? null : (int) $listeners;
        $out['online']    = ($out['title'] !== '' || $out['artist'] !== '');
        break;

    /* --------------------------------------------------------------- */
    case 'icecast':
    default:
        $ice = $data['icestats'] ?? [];
        $source = $ice['source'] ?? null;
        if ($source === null) break;

        // "source" can be a single object or a list of mounts.
        $sources = isset($source[0]) ? $source : [$source];
        $mount   = cfg('nowplaying.mount');
        $chosen  = null;

        if ($mount !== '') {
            foreach ($sources as $s) {
                $listenurl = (string) ($s['listenurl'] ?? '');
                if ($listenurl !== '' && substr($listenurl, -strlen($mount)) === $mount) {
                    $chosen = $s;
                    break;
                }
            }
        }
        if ($chosen === null) {
            // First source that actually has a title, else the first one.
            foreach ($sources as $s) {
                if (!empty($s['title']) || !empty($s['artist'])) { $chosen = $s; break; }
            }
            if ($chosen === null) $chosen = $sources[0];
        }

        // Liquidsoap can emit artist/title separately; prefer that.
        if (!empty($chosen['artist']) || !empty($chosen['title'])) {
            $maybeArtist = (string) ($chosen['artist'] ?? '');
            $maybeTitle  = (string) ($chosen['title']  ?? '');
            if ($maybeArtist !== '' && $maybeTitle !== '') {
                $out['artist'] = trim($maybeArtist);
                $out['title']  = trim($maybeTitle);
            } else {
                [$out['artist'], $out['title']] = split_title($maybeTitle !== '' ? $maybeTitle : $maybeArtist, $delim);
            }
        }
        $out['listeners']      = isset($chosen['listeners'])    ? (int) $chosen['listeners']    : null;
        $out['listeners_peak'] = isset($chosen['listener_peak']) ? (int) $chosen['listener_peak'] : null;
        $out['online'] = ($out['title'] !== '' || $out['artist'] !== '');
        break;
}

// Strip configured junk from the metadata before returning it.
$out['artist'] = clean_str($out['artist']);
$out['title']  = clean_str($out['title']);

json_out($out);