Martin Slachta
91 lines
3.0 KiB
PHP
91 lines
3.0 KiB
PHP
<?php
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namespace Reservair\Templating\Elements;
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use Reservair\Templating\RsvTemplateElement;
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use Reservair\Templating\RsvTemplateSymbols;
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use chillerlan\QRCode\Output\QRGdImagePNG;
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use chillerlan\QRCode\QRCode;
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use chillerlan\QRCode\Data\QRMatrix;
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use chillerlan\QRCode\QROptions;
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use chillerlan\QRCode\Output\QROutputInterface;
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/** Renders a QR payment code for the form's total price into an email body. */
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class RsvQrPaymentElement implements RsvTemplateElement {
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public function render(RsvTemplateSymbols $symbols): string {
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$account = trim((string) $symbols->get('account', ''));
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if ($account === '') {
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return ''; // No payee account configured — nothing to render.
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}
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$payload = $this->spayd(
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$account,
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(float) $symbols->get('price', 0),
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(string) $symbols->get('currency', 'CZK'),
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(string) $symbols->get('message', ''),
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(string) $symbols->get('variable_symbol', '')
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);
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$src = $this->image_url($payload);
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if ($src === '') {
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return ''; // Image could not be written.
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}
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return '<img class="rsv-qr-payment" alt="' . esc_attr__('QR platba', 'reservair')
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. '" src="' . esc_url($src) . '" />';
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}
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public function symbols(): array {
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return ['account', 'currency', 'message', 'variable_symbol'];
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}
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/** Builds a SPAYD string (Czech QR payment). '*' is the field delimiter. */
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private function spayd(string $account, float $price, string $currency, string $message, string $vs): string {
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$parts = [
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'SPD*1.0',
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'ACC:' . $account,
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'AM:' . number_format($price, 2, '.', ''),
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'CC:' . $currency,
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];
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if ($message !== '') {
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$parts[] = 'MSG:' . str_replace('*', ' ', $message);
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}
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if ($vs !== '') {
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$parts[] = 'X-VS:' . preg_replace('/\D/', '', $vs);
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}
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return implode('*', $parts);
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}
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/**
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* Writes the QR PNG under uploads (deduped by payload hash) and returns its
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* public URL, or '' if it could not be written.
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*/
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private function image_url(string $payload): string {
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$uploads = wp_upload_dir();
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$dir = $uploads['basedir'] . '/reservair-qr';
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$name = hash('sha256', $payload) . '.png';
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$path = $dir . '/' . $name;
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if (!file_exists($path)) {
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wp_mkdir_p($dir);
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if (file_put_contents($path, $this->png($payload)) === false) {
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return '';
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}
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}
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return $uploads['baseurl'] . '/reservair-qr/' . $name;
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}
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private function png(string $payload): string {
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$options = new QROptions();
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$options->version = 7;
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$options->outputInterface = QRGdImagePNG::class;
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$options->scale = 4;
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$options->outputBase64 = false;
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$options->bgColor = [200, 150, 200];
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return (string) (new QRCode($options))->render($payload);
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}
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}
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