media.php

<?php
/**
 * Where media lives — the single place the public pages and the admin agree on.
 *
 * The database stores bare filenames ('ana_margolin_1.m4a'), never paths, so
 * moving to object storage needs no schema change and no data migration. Only
 * the URL prefix moves.
 *
 * Default is local: /images/... and /readings/... served off this host,
 * exactly as before. Create /home/raphi/config/media_config.php returning
 *
 *     <?php return ['media_url' => 'https://media.yiddish.nu'];
 *
 * and every page starts serving from the bucket instead. Delete it to roll
 * back. That one file is the whole switch.
 */

if (!isset($MEDIA_BASE)) {
    $MEDIA_BASE = '';
    $__mcfg = '/home/raphi/config/media_config.php';
    if (is_file($__mcfg)) {
        $__m = require $__mcfg;
        $MEDIA_BASE = rtrim((string)($__m['media_url'] ?? ''), '/');
    }
}

if (!function_exists('media_url')) {
    /**
     * @param string $file bare filename from the database
     * @param string $kind 'images' or 'readings'
     */
    function media_url(?string $file, string $kind): string
    {
        global $MEDIA_BASE;
        $file = trim((string)$file);
        if ($file === '') {
            $file = $kind === 'images' ? 'default.png' : '';
        }
        // Legacy rows might already hold a full URL; leave those alone.
        if (preg_match('#^https?://#i', $file)) {
            return $file;
        }
        return $MEDIA_BASE . '/' . $kind . '/' . rawurlencode($file);
    }
}

if (!function_exists('audio_mime')) {
    function audio_mime(string $file): string
    {
        return match (strtolower(pathinfo($file, PATHINFO_EXTENSION))) {
            'm4a'  => 'audio/mp4',
            'wav'  => 'audio/wav',
            'ogg'  => 'audio/ogg',
            'flac' => 'audio/flac',
            default => 'audio/mpeg',
        };
    }
}

if (!function_exists('image_mime')) {
    function image_mime(string $file): string
    {
        return match (strtolower(pathinfo($file, PATHINFO_EXTENSION))) {
            'png'  => 'image/png',
            'gif'  => 'image/gif',
            'webp' => 'image/webp',
            default => 'image/jpeg',
        };
    }
}