private static $self = false;

public function __construct() {

add_action('admin_menu', [$this, 'eotnot_admin_menus'], 11);

add_action('admin_init', [$this, 'eotnot_admin_init']);

add_action('wp_ajax_nopriv_eotnot_row_markup', function() {

$this->eotnot_row_markup($_POST['eotnot_index'], null, true);

});

add_action('wp_ajax_eotnot_row_markup', function() {

$this->eotnot_row_markup($_POST['eotnot_index'], null, true);

});

add_action('ws_plugin__s2member_during_auto_eot_system', [$this, 'eotnot_add_expired_meta']);

register_activation_hook(__FILE__, [$this, 'eotnot_activation']);

add_action('eotnot_eot_cron', [$this, 'eotnot_send_emails']);

register_deactivation_hook(__FILE__, [$this, 'eotnot_deactivation']);

}

public function eotnot_activation() {

wp_schedule_event(strtotime('+ 1 minute', time()), 'hourly', 'eotnot_eot_cron');

}

public function eotnot_deactivation() {

wp_clear_scheduled_hook('eotnot_eot_cron');

}

public function admin_print_styles() {

wp_enqueue_style('eotnot_styles');

wp_enqueue_script('eotnot_scripts');

wp_localize_script( 'eotnot_scripts', 'ajax_object',

array( 'ajax_url' => admin_url( 'admin-ajax.php' ) ) );

}

public function eotnot_admin_init() {

register_setting( 'eotnot_options', 'eotnot_options', [$this, 'eotnot_options_validate'] );

add_settings_section('eotnot_settings_section', 'Notifications', function() {echo ''; }, 'eotnot');

add_settings_field('eotnot_from',

'Send Notifications From <span class="eotnot_instruction">(see <a href="https://codex.wordpress.org/Function_Reference/wp_mail#Valid_Address_Formats" target="_blank">the codex</a> for valid formats)</span>',

[$this, 'eotnot_from_markup'],

'eotnot',

'eotnot_settings_section'

);

add_settings_field('eotnot_reminder', '', [$this, 'eotnot_reminder_markup'], 'eotnot', 'eotnot_settings_section');

add_settings_field('eotnot_end', '', [$this, 'eotnot_end_markup'], 'eotnot', 'eotnot_settings_section');

wp_register_style( 'eotnot_styles', plugins_url( 'dist/css/styles.css', __FILE__ ) );

wp_register_script( 'eotnot_scripts', plugins_url( 'dist/js/scripts.js', __FILE__ ) );

}

public function eotnot_reminder_markup() {

$options = get_option('eotnot_options');

$index = 0;

foreach($options['eotnot_reminder'] as $notification) {

echo $this->eotnot_row_markup($index, $notification);

$index++;

}

echo $this->eotnot_row_markup($index);

}

public function eotnot_from_markup() {

$options = get_option('eotnot_options');

echo "<input id='eotnot_from' placeholder='Me Myself <me@example.net>' name='eotnot_options[eotnot_from]' type='text' value='{$options['eotnot_from']}' />";

echo "</td></tr></table><table class='eotnot_reminders_table'>";

}

public function eotnot_end_markup() {

echo '</table>';

}

public function eotnot_options_validate($input) {

foreach($input['eotnot_reminder'] as $index => $notification) {

if($notification['eotnot_reminder_title'] == '') {

unset($input['eotnot_reminder'][$index]);

}

}

return $input;

}

public function eotnot_admin_menus() {

$page = add_submenu_page('ws-plugin--s2member-start', 'End-of-Term Notifications', 'EOT Notifications', 'manage_options', 'eotnot-options', [$this, 'eotnot_options_html']);

add_action( 'admin_print_styles-' . $page, [$this, 'admin_print_styles'] );

}

public function eotnot_options_html() {

echo '<div class="wrap">

<h2>Renewal Emails</h2>

<form id="eotnot-settings-form" data-parsley-validate action="options.php" method="post">';

settings_fields('eotnot_options');

do_settings_sections('eotnot');

echo '<button type="button" class="eotnot-add-another button button-secondary">Add Another</button><br>';

echo '<input class="button button-primary" name="Submit" type="submit" value="';

esc_attr_e('Save Changes');

echo '" />

</form>

</div>';

}

public function eotnot_row_markup($index, $notification = null, $ajax = false) {

ob_start();

echo "<tr>

<td>

<h4 class='eotnot-notification-title".(!$notification ? " eotnot-notification-title--new" : "")."'>".($notification ? $notification['eotnot_reminder_title']."<span class='dashicons dashicons-arrow-right-alt2'></span>" : "New Notification")."</h4>

</td>

</tr>

<tr class='eotnot-notification-content".(!$notification ? " eotnot-notification-content--new" : "")."'>

<td>

<table>

<tr>

<td>

<input name='eotnot_options[eotnot_reminder][$index][id]' type='hidden' value='".$index."'>

<label>Title</label>

</td>

<td colspan='4'>

<input name='eotnot_options[eotnot_reminder][$index][eotnot_reminder_title]' size='40' type='text' value=\"".($notification ? $notification['eotnot_reminder_title'] : "")."\" />

</td>

</tr>

<tr>

<td>

<label>Trigger</label>

</td>

<td colspan='2'>

<label class='eotnot-sublabel'>Trigger Amount</label>

<input name='eotnot_options[eotnot_reminder][$index][eotnot_reminder_trigger_number]' type='number' min='0' value=\"".($notification ? $notification['eotnot_reminder_trigger_number'] : "")."\" />

</td>

<td colspan='1'>

<label class='eotnot-sublabel'>Trigger Unit</label>

<select name='eotnot_options[eotnot_reminder][$index][eotnot_reminder_trigger_units]'>";

$unit_options = ['days' => 'Days', 'weeks' => 'Weeks', 'hours' => 'Hours', 'minutes' => 'Minutes'];

foreach($unit_options as $unit_option => $label) {

echo "<option ".($notification['eotnot_reminder_trigger_units'] == $unit_option ? "selected " : "")."value=\"".$unit_option."\">".$label."</option>";

}

echo "</select>

</td>

<td colspan='1'>

<label class='eotnot-sublabel'>Trigger Period</label>

<select name='eotnot_options[eotnot_reminder][$index][eotnot_reminder_trigger_period]'>

<option value='-'>Before</option>

<option value='+'>After</option>

</select>

</td>

</tr>

<tr>

<td>

<label>Subject</label>

</td>

<td colspan='4'>

<input name='eotnot_options[eotnot_reminder][$index][eotnot_reminder_subject]' size='40' type='text' value=\"".($notification ? stripslashes($notification['eotnot_reminder_subject']) : "")."\" />

</td>

</tr>

</table>

<table>

<tr>

<td>

<label>Email Content</label>";

echo '<label class="eotnot-sublabel">To use user information in your content, use shortcodes of the format [eot_userinfo="<a href="https://codex.wordpress.org/Function_Reference/get_userdata#Notes" target="_blank">{user_field_here}</a>"].';

wp_editor(

($notification ? $notification['eotnot_reminder_content'] : ""),

"eotnot_wysiwyg_content_$index",

['textarea_name'=>"eotnot_options[eotnot_reminder][$index][eotnot_reminder_content]"]);

echo "</td>

</tr>

</table>

<table>

<tr>

<td>

<button type='button' class='button button-primary preview-notification'>Preview Email</button>

</td>

</tr>

</table>

</td>

</tr>";

if(!$ajax) {

return ob_get_clean();

} else {

ob_flush();

wp_die();

}

}

public function eotnot_send_emails() {

$users = get_users();

$time = time();

foreach($users as $user) {

if( ( $eot = get_user_field ( 's2member_auto_eot_time', $user->ID ) ) || ( $eot = get_user_meta( $user->ID, 'eotnot_last_expired_at', true ) ) ) {

$lastEmailSent = get_user_meta($user->ID, 'eotnot_last_sent', true);

if(!$lastEmailSent) $lastEmailSent = 0;

$options = get_option('eotnot_options');

foreach($options['eotnot_reminder'] as $notification) {

$sendAt = strtotime($notification['eotnot_reminder_trigger_period'].' '.$notification['eotnot_reminder_trigger_number'].' '.$notification['eotnot_reminder_trigger_units'], $eot);

if($sendAt < $lastEmailSent || $sendAt > $time) {

continue;

}

$sent = $this->eotnot_send_email($notification['eotnot_reminder_subject'], $notification['eotnot_reminder_content'], $user->ID);

if($sent) {

update_user_meta($user->ID, 'eotnot_last_sent', $time);

}

}

}

}

}

public function eotnot_send_email($subject, $content, $user_id) {

return wp_mail(get_userdata($user_id)->user_email, $this->parse_user_shortcodes($subject, $user_id), '<html><body>'.$this->get_email_content($content, $user_id).'</body></html>', ['Content-Type: text/html; charset=UTF-8', 'From: '.get_option('eotnot_options', get_option('admin_email'))['eotnot_from']]);

}

public function parse_user_shortcodes($content, $user_id) {

$userdata = get_userdata($user_id);

$regex_match = array();

foreach($userdata->data as $key=>$value) {

$regex_match[] = "/\[eot_userinfo=\"($key)\"\]/";

}

$content = preg_replace_callback($regex_match, function($matches) use ($userdata) {

return $userdata->$matches[1];

}, $content);

return $content;

}

public function get_email_content($content, $user_id) {

return apply_filters('the_content', $this->parse_user_shortcodes($content, $user_id));

}

public function eotnot_add_expired_meta($vars) {

update_user_meta($vars['user']->data->ID, 'eotnot_last_expired_at', $vars['auto_eot_time']);

}

public static function getInstance() {

if(!self::$self) {

self::$self = new self();

}

return self::$self;

}