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Viewing: pwa-icon.php

<?php
require_once __DIR__ . '/config/config.php';
require_once __DIR__ . '/app/core/Database.php';
require_once __DIR__ . '/app/core/Model.php';
require_once __DIR__ . '/app/models/Ajuste.php';

function normalizePwaIconPath(string $path, string $fallback = ''): string
{
    $path = trim($path);
    if ($path === '') {
        $path = $fallback;
    }

    return $path;
}

function resolvePwaLocalPath(string $assetPath): ?string
{
    $assetPath = trim($assetPath);
    if ($assetPath === '') {
        return null;
    }

    if (preg_match('/^(https?:)?\/\//i', $assetPath) || str_starts_with($assetPath, 'data:')) {
        return null;
    }

    $assetPath = ltrim(str_replace('\\', '/', $assetPath), '/');
    $fullPath = ROOT_PATH . '/' . $assetPath;

    return is_file($fullPath) ? $fullPath : null;
}

function createImageResourceFromFile(string $path)
{
    $extension = strtolower(pathinfo($path, PATHINFO_EXTENSION));

    return match ($extension) {
        'png' => @imagecreatefrompng($path),
        'jpg', 'jpeg' => @imagecreatefromjpeg($path),
        'gif' => @imagecreatefromgif($path),
        'webp' => function_exists('imagecreatefromwebp') ? @imagecreatefromwebp($path) : false,
        default => false,
    };
}

$requestedSize = isset($_GET['size']) ? (int)$_GET['size'] : 512;
$allowedSizes = [180, 192, 512];
$size = in_array($requestedSize, $allowedSizes, true) ? $requestedSize : 512;
$fallbackPath = ROOT_PATH . '/public/assets/img/PNG.png';
$sourcePath = $fallbackPath;

try {
    $ajustesMap = Ajuste::getMap();
    $faviconSetting = normalizePwaIconPath($ajustesMap['favicon'] ?? '', 'public/assets/img/favicon.png');
    $faviconLocalPath = resolvePwaLocalPath($faviconSetting);

    if ($faviconLocalPath) {
        $sourcePath = $faviconLocalPath;
    }
} catch (Throwable $e) {
}

if (!extension_loaded('gd')) {
    if (is_file($sourcePath)) {
        header('Content-Type: image/png');
        readfile($sourcePath);
        exit;
    }

    http_response_code(404);
    exit;
}

$source = createImageResourceFromFile($sourcePath);
if (!$source) {
    $source = createImageResourceFromFile($fallbackPath);
}

if (!$source) {
    http_response_code(404);
    exit;
}

$canvas = imagecreatetruecolor($size, $size);
imagealphablending($canvas, false);
imagesavealpha($canvas, true);
$transparent = imagecolorallocatealpha($canvas, 0, 0, 0, 127);
imagefilledrectangle($canvas, 0, 0, $size, $size, $transparent);

$sourceWidth = imagesx($source);
$sourceHeight = imagesy($source);
$scale = min($size / max($sourceWidth, 1), $size / max($sourceHeight, 1));
$targetWidth = max(1, (int)round($sourceWidth * $scale));
$targetHeight = max(1, (int)round($sourceHeight * $scale));
$targetX = (int)floor(($size - $targetWidth) / 2);
$targetY = (int)floor(($size - $targetHeight) / 2);

imagecopyresampled($canvas, $source, $targetX, $targetY, 0, 0, $targetWidth, $targetHeight, $sourceWidth, $sourceHeight);

header('Content-Type: image/png');
header('Cache-Control: public, max-age=86400');
imagepng($canvas);
imagedestroy($canvas);
imagedestroy($source);
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