Files
unsupervised-scheduler/unsupervised-schedular.php
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Kydoimosandanthropic/claude-opus-4-8 e389e40843
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Send each scheduled payment's due notice exactly once
The daily billing scan runs on request via WP-Cron and can overlap
itself under concurrent traffic. Each run emailed the payments it
created with no record that a notice had gone out, so two overlapping
runs could send a payer two identical "Payment due" emails for one
charge — read by families as being billed twice, though only one row
exists.

Stamp us_payments.notice_sent_at atomically before emailing: the scan
now claims each payment with a conditional UPDATE ... WHERE
notice_sent_at IS NULL and only notices, credits and batches the rows
it won. A competing run finds them claimed and stays quiet, so exactly
one notice is sent regardless of how the scan is triggered. A one-time
backfill stamps existing scheduled rows on upgrade so already-noticed
charges are not re-emailed.

Co-authored-by: anthropic/claude-opus-4-8
2026-09-17 13:19:25 -03:00

45 lines
1.3 KiB
PHP

<?php
/**
* Plugin Name: Unsupervised Scheduler
* Plugin URI: https://git.unsupervised.ca/Unsupervised/unsupervised-scheduler
* Description: Instructor/student lesson scheduling for WordPress.
* Version: 1.5.8
* Requires at least: 6.2
* Requires PHP: 8.1
* Author: Unsupervised
* Author URI: https://unsupervised.ca
* License: GPL-2.0-or-later
* Text Domain: unsupervised-schedular
* Update URI: https://git.unsupervised.ca/Unsupervised/unsupervised-scheduler
*/
declare(strict_types=1);
namespace Unsupervised\Schedular;
if (! defined('ABSPATH')) {
exit;
}
define('USC_VERSION', '1.5.8');
define('USC_PLUGIN_FILE', __FILE__);
define('USC_PLUGIN_DIR', plugin_dir_path(__FILE__));
define('USC_PLUGIN_URL', plugin_dir_url(__FILE__));
define('USC_TABLE_AVAILABILITY', $GLOBALS['wpdb']->prefix . 'us_availability');
define('USC_TABLE_LESSONS', $GLOBALS['wpdb']->prefix . 'us_lessons');
require_once USC_PLUGIN_DIR . 'vendor/autoload.php';
register_activation_hook(__FILE__, static function (): void {
(new Installer())->run();
});
register_deactivation_hook(__FILE__, static function (): void {
wp_clear_scheduled_hook('us_generate_due_payments');
flush_rewrite_rules();
});
add_action('plugins_loaded', static function (): void {
Plugin::boot();
});