<?php
// Exit if accessed directly
if (!defined('ABSPATH')) {
exit;
}
global $wpdb;
$awqc_table_name = $wpdb->prefix . 'history_qr'; // table name
$awqc_message = '';
$awqc_notice = '';
$awqc_default = array(
'id' => 0,
'name' => ''
);
/**
* Validate generate QR form data
*
* @param array $item Form data to validate
* @return bool|string True if valid, error message string if invalid
*/
function awqc_validate_generate_qr($item)
{
$messages = array();
if (empty($item['name'])) {
$messages[] = esc_html__('Name is required', 'attendance_with_qr_code');
}
if (empty($messages)) {
return true;
}
return implode('<br />', $messages);
}
// If submit will update the data
if (isset($_REQUEST['nonce']) && wp_verify_nonce(sanitize_text_field(wp_unslash($_REQUEST['nonce'])), basename(__FILE__))) {
// Check user capabilities
if (!current_user_can('manage_options')) {
wp_die(esc_html__('You do not have sufficient permissions to access this page.', 'attendance_with_qr_code'));
}
// Sanitize input data
$awqc_item = array(
'id' => isset($_REQUEST['id']) ? intval($_REQUEST['id']) : 0,
'name' => isset($_REQUEST['name']) ? sanitize_text_field(wp_unslash($_REQUEST['name'])) : '',
);
// validate data, and if all ok save item to database
$awqc_item_valid = awqc_validate_generate_qr($awqc_item);
if ($awqc_item_valid === true) {
// phpcs:ignore WordPress.DB.DirectDatabaseQuery.DirectQuery,WordPress.DB.DirectDatabaseQuery.NoCaching
$awqc_result = $wpdb->insert($awqc_table_name, array('name' => $awqc_item['name']), array('%s'));
$awqc_item['id'] = $wpdb->insert_id;
if ($awqc_result) {
$awqc_message = esc_html__('QR code was successfully generated', 'attendance_with_qr_code');
} else {
$awqc_notice = esc_html__('There was an error while generating the QR code', 'attendance_with_qr_code');
}
} else {
// if $awqc_item_valid not true it contains error message(s)
$awqc_notice = $awqc_item_valid;
}
}
?>
<div class="wrap">
<h1 class="wp-heading-inline"><?php echo esc_html__('Generate QR Code', 'attendance_with_qr_code'); ?></h1>
<hr class="wp-header-end">
<?php if (!empty($awqc_notice)) : ?>
<div class="notice notice-error is-dismissible" style="margin: 20px 0;">
<p><?php echo wp_kses_post($awqc_notice); ?></p>
</div>
<?php endif; ?>
<?php if (!empty($awqc_message)) : ?>
<div class="notice notice-success is-dismissible" style="margin: 20px 0;">
<p><?php echo esc_html($awqc_message); ?></p>
</div>
<?php endif; ?>
<div class="notice notice-info" style="margin: 20px 0;">
<p><strong><?php echo esc_html__('Generate QR Code', 'attendance_with_qr_code'); ?></strong> <?php echo esc_html__('Create QR codes for employees or students. Enter a name and generate a unique QR code that can be used for attendance tracking.', 'attendance_with_qr_code'); ?></p>
</div>
<div class="row-col">
<div class="col-60">
<div class="awqc-form-item">
<form id="form" method="POST">
<input type="hidden" name="nonce" value="<?php echo esc_attr(wp_create_nonce(basename(__FILE__))); ?>" />
<table class="form-table" role="presentation">
<tbody>
<tr>
<th scope="row">
<label for="name"><?php echo esc_html__('Employee/Student Name', 'attendance_with_qr_code'); ?></label>
</th>
<td>
<input type="text" id="name" name="name" class="regular-text" placeholder="<?php esc_attr_e('Enter full name', 'attendance_with_qr_code'); ?>" value="<?php echo isset($_POST['name']) ? esc_attr(sanitize_text_field(wp_unslash($_POST['name']))) : ''; ?>" required>
<p class="description">
<span class="dashicons dashicons-info-outline" aria-hidden="true"></span>
<?php echo esc_html__('Enter the full name of the employee or student. This name will be encoded in the QR code.', 'attendance_with_qr_code'); ?>
</p>
</td>
</tr>
</tbody>
</table>
<p class="submit">
<input type="submit" id="submit" class="button button-primary" name="submit" value="<?php esc_attr_e('Generate QR Code', 'attendance_with_qr_code'); ?>">
</p>
</form>
</div>
</div>
<div class="col-40">
<div class="awqc-qr-preview">
<h3><?php echo esc_html__('QR Code Preview', 'attendance_with_qr_code'); ?></h3>
<?php
// Display QR code if form was successfully submitted
// Use sanitized value from form processing above if available
if (!empty($awqc_message) && isset($awqc_item) && !empty($awqc_item['name'])) {
$awqc_name = $awqc_item['name'];
$awqc_qr = json_encode(array('name' => $awqc_name));
// Use local QR generator with caching for faster loading
$awqc_qr_image_url = awqc_get_qr_code_url($awqc_qr, 250);
$awqc_qr_download_url = awqc_get_qr_code_url($awqc_qr, 400);
echo '<img src="' . esc_url($awqc_qr_image_url) . '" alt="' . esc_attr__('QR Code', 'attendance_with_qr_code') . '">';
echo '<p style="margin: 10px 0;"><strong>' . esc_html($awqc_name) . '</strong></p>';
echo '<a href="' . esc_url($awqc_qr_download_url) . '" download="qr-code-' . esc_attr(sanitize_file_name($awqc_name)) . '.png" class="button button-primary button-center">';
echo '<span class="dashicons dashicons-download" style="margin-top: 3px;"></span> ' . esc_html__('Download QR Code', 'attendance_with_qr_code');
echo '</a>';
} else {
echo '<img src="' . esc_url(AWQC_PLUGIN_URL . 'assets/img/qr-default.png') . '" alt="' . esc_attr__('QR Code Preview', 'attendance_with_qr_code') . '" style="opacity: 0.5;">';
echo '<p class="description" style="margin-top: 10px; font-size: 13px;">' . esc_html__('Enter a name and click "Generate QR Code" to create a QR code.', 'attendance_with_qr_code') . '</p>';
}
?>
</div>
</div>
</div>
</div><!-- .wrap -->
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