laurence/eventbrite-for-the-events-calendar
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Initial release of Eventbrite for The Events Calendar (v1.0.0)

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Bidirectional sync between Eventbrite and The Events Calendar, with
WooCommerce ticket purchasing that bypasses Eventbrite's processing
fees by registering buyers as free attendees via API. Includes venue/
organizer sync, QR code ticket generation, attendee management with
CSV export, scheduled sync via WP-Cron, and real-time Eventbrite
webhooks.
This commit is contained in:
Laurence Horrocks-Barlow 2026-05-17 08:48:04 +01:00
commit f3bc795d9a
15 changed files with 3132 additions and 0 deletions
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77
includes/class-eb4tec-qr-code.php Normal file
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<?php
if ( ! defined( 'ABSPATH' ) ) {
exit;
}
final class EB4TEC_QR_Code {
public function generate( string $data, int $size = 0 ): string|WP_Error {
if ( $size <= 0 ) {
$size = (int) get_option( 'eb4tec_qr_size', 200 );
}
$hash = md5( $data );
$uploads = wp_upload_dir();
$dir = trailingslashit( $uploads['basedir'] ) . 'eb4tec-qr/';
$file = $dir . $hash . '.png';
$url = trailingslashit( $uploads['baseurl'] ) . 'eb4tec-qr/' . $hash . '.png';
if ( file_exists( $file ) ) {
return $url;
}
// Create directory if needed.
if ( ! wp_mkdir_p( $dir ) ) {
return new WP_Error( 'eb4tec_qr_dir', __( 'Could not create QR code directory.', 'eb4tec' ) );
}
// Fetch from Google Chart API (no API key required for QR endpoint).
$api_url = add_query_arg( [
'cht' => 'qr',
'chs' => "{$size}x{$size}",
'chl' => rawurlencode( $data ),
'choe' => 'UTF-8',
], 'https://chart.googleapis.com/chart' );
$response = wp_remote_get( $api_url, [ 'timeout' => 15 ] );
if ( is_wp_error( $response ) ) {
return $response;
}
$code = wp_remote_retrieve_response_code( $response );
if ( $code !== 200 ) {
return new WP_Error( 'eb4tec_qr_fetch', __( 'QR code generation failed.', 'eb4tec' ), [ 'status' => $code ] );
}
$body = wp_remote_retrieve_body( $response );
// phpcs:ignore WordPress.WP.AlternativeFunctions.file_system_operations_file_put_contents
if ( false === file_put_contents( $file, $body ) ) {
return new WP_Error( 'eb4tec_qr_write', __( 'Could not save QR code image.', 'eb4tec' ) );
}
return $url;
}
public function get_attendee_qr_data( string $attendee_id, string $order_id, string $event_id ): string {
return "EB4TEC:{$attendee_id}:{$order_id}:{$event_id}";
}
public function render_qr_html( string $url, string $attendee_id = '', int $size = 0 ): string {
if ( $size <= 0 ) {
$size = (int) get_option( 'eb4tec_qr_size', 200 );
}
$alt = $attendee_id
? sprintf( __( 'Ticket QR code for attendee %s', 'eb4tec' ), esc_attr( $attendee_id ) )
: __( 'Ticket QR code', 'eb4tec' );
return sprintf(
'<img src="%s" alt="%s" width="%d" height="%d" class="eb4tec-qr-code" style="display:block;margin:8px 0;">',
esc_url( $url ),
esc_attr( $alt ),
$size,
$size
);
}
}