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feat: add liquid filter qr_code

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Benjamin Nussbaum 2026-01-14 14:51:55 +01:00
parent 6bc672c3c4
commit de1a390574
2 changed files with 144 additions and 0 deletions
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47
app/Liquid/Filters/StringMarkup.php
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@ -7,6 +7,7 @@ use Illuminate\Support\Str;
use Keepsuit\Liquid\Filters\FiltersProvider;
use League\CommonMark\CommonMarkConverter;
use League\CommonMark\Exception\CommonMarkException;
use SimpleSoftwareIO\QrCode\Facades\QrCode;
/**
* String, Markup, and HTML filters for Liquid templates
@ -58,4 +59,50 @@ class StringMarkup extends FiltersProvider
{
return strip_tags($html);
}
/**
* Generate a QR code as SVG from the input text
*
* @param string $text The text to encode in the QR code
* @param int|null $moduleSize Optional module size (defaults to 11, which equals 319px)
* @param string|null $errorCorrection Optional error correction level: 'l', 'm', 'q', 'h' (defaults to 'm')
* @return string The SVG QR code
*/
public function qr_code(string $text, ?int $moduleSize = null, ?string $errorCorrection = null): string
{
// Default module_size is 11
// Size calculation: (21 modules for QR code + 4 modules margin on each side * 2) * module_size
// = (21 + 8) * module_size = 29 * module_size
$moduleSize = $moduleSize ?? 11;
$size = 29 * $moduleSize;
$qrCode = QrCode::format('svg')
->size($size);
// Set error correction level if provided
if ($errorCorrection !== null) {
$qrCode->errorCorrection($errorCorrection);
}
$svg = (string) $qrCode->generate($text);
// Add class="qr-code" to the SVG element
// The SVG may start with <?xml...> and then <svg, so we need to find the <svg tag
// Match <svg followed by whitespace or attributes, and insert class before the first attribute or closing >
if (preg_match('/<svg\s+([^>]*)>/', $svg, $matches)) {
$attributes = $matches[1];
// Check if class already exists
if (mb_strpos($attributes, 'class=') === false) {
$svg = preg_replace('/<svg\s+([^>]*)>/', '<svg class="qr-code" $1>', $svg, 1);
} else {
// If class exists, add qr-code to it
$svg = preg_replace('/(<svg\s+[^>]*class=["\'])([^"\']*)(["\'][^>]*>)/', '$1$2 qr-code$3', $svg, 1);
}
} else {
// Fallback: simple replacement if no attributes
$svg = preg_replace('/<svg>/', '<svg class="qr-code">', $svg, 1);
}
return $svg;
}
}