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File: /data/www/welovefamily.at/welovefamily.at/htdocs/wp-content/plugins/sweepstake/SweepstakePlugin.php
<?php

class SweepstakePlugin
{
    const POSTTYPE_SWEEPSTAKE = 'sweepstake';

    const DB_TABLE_SUBSCRIBERS = 'wp_sweepstake_subscribers';

    const SHORTCODE         = 'sweepstake';
    const SHORTCODE_ATTR    = 'feld';

    private static $initiated = false;
    
    protected $options;

    public function init()
    {
        if (!self::$initiated) {
            $this->initHooks();
            $this->registerPostTypes();
        }

        $this->options = get_option('sweepstake_settings', array());
    }

    /**
     * Initializes WordPress hooks
     */
    private function initHooks()
    {
        self::$initiated = true;

        add_shortcode(self::SHORTCODE, array($this, 'shortcode_sweepstake'));

        add_action('before_delete_post', array($this, 'before_delete_post'));
        add_action('delete_user', array($this, 'delete_user'));
    }

    public function registerPostTypes()
    {
        $labels = array(
            'name'                => __('Gewinnspiele', 'sweepstake'),
            'singular_name'       => __('Gewinnspiel', 'sweepstake'),
            'add_new'             => _x('Neues Gewinnspiel hinzufügen', 'sweepstake', 'sweepstake'),
            'add_new_item'        => __('Neues Gewinnspiel hinzufügen', 'sweepstake'),
            'edit_item'           => __('Gewinnspiel bearbeiten', 'sweepstake'),
            'new_item'            => __('Neues Gewinnspiel', 'sweepstake'),
            'view_item'           => __('Gewinnspiel anzeigen', 'sweepstake'),
            'search_items'        => __('Nach Gewinnspiel suchen', 'sweepstake'),
            'not_found'           => __('Kein Gewinnspiel gefunden', 'sweepstake'),
            'not_found_in_trash'  => __('Kein Gewinnspiel im Papierkorb gefunden', 'sweepstake'),
            'parent_item_colon'   => __('Eltern Gewinnspiel:', 'sweepstake'),
            'menu_name'           => __('Gewinnspiele', 'sweepstake'),
        );
        $args = array(
            'labels'              => $labels,
            'hierarchical'        => false,
            'description'         => __('Gewinnspiele'),
            'taxonomies'          => array(),
            'public'              => true,
            'show_ui'             => true,
            'show_in_menu'        => true,
            'show_in_admin_bar'   => true,
            'menu_position'       => null,
            'menu_icon'           => 'dashicons-star-filled',
            'show_in_nav_menus'   => true,
            'publicly_queryable'  => true,
            'exclude_from_search' => false,
            'has_archive'         => true,
            'query_var'           => true,
            'can_export'          => true,
            'rewrite'             => array('slug' => 'gewinnspiel'),
            'capability_type'     => 'post',
            'map_meta_cap'        => true,
            'supports'            => array(
                'title',
                'editor',
                //'author',
                'thumbnail',
                //'excerpt',
                'custom-fields',
                //'trackbacks',
                //'comments',
                'revisions',
                'page-attributes',
                //'post-formats'
            )
        );
    
        register_post_type(self::POSTTYPE_SWEEPSTAKE, $args);
    }

    public function shortcode_sweepstake($attr)
    {
            $a = shortcode_atts(array(
                self::SHORTCODE_ATTR => null
            ), $attr);

            return get_sweepstake_data($a[self::SHORTCODE_ATTR]);
    }

    public function delete_user($userid)
    {
        global $wpdb;
        $wpdb->query($wpdb->prepare("DELETE FROM " . self::DB_TABLE_SUBSCRIBERS . " WHERE user_id = %d", $userid));
    }

    public function before_delete_post($postid)
    {
        // We check if the global post type isn't ours and just return
        global $post_type;   
        if ($post_type != self::POSTTYPE_SWEEPSTAKE) {
            return;
        }

        global $wpdb;
        $wpdb->query($wpdb->prepare("DELETE FROM " . self::DB_TABLE_SUBSCRIBERS . " WHERE post_id = %d", $postid));
    }

    public static function plugin_activation()
    {
        if (version_compare($GLOBALS['wp_version'], SWEEPSTAKE__MINIMUM_WP_VERSION, '<')) {
        }

        add_option('sweepstake_settings', array(
            )
        );
    }

    public static function plugin_deactivation()
    {
    }

    public static function debugLog($var)
    {
        if (defined('WP_DEBUG_LOG') && WP_DEBUG_LOG) {
            error_log(print_r(compact('var'), 1));
        }
    }
}


// Template Tags

function is_sweepstake_subscriber($postId = null, $userId = null)
{
    if ($postId === null) {
        $postId = get_the_ID();
    }
    if ($userId === null) {
        $userId = get_current_user_id();
    }

    global $wpdb;
    $count = $wpdb->get_var($wpdb->prepare("SELECT COUNT(*) FROM " . SweepstakePlugin::DB_TABLE_SUBSCRIBERS . " WHERE post_id = %d AND user_id = %d", $postId, $userId));

    return (bool)$count;
}

function sweepstake_subscribe($postId = null, $userId = null)
{
    if ($postId === null) {
        $postId = get_the_ID();
    }
    if ($userId === null) {
        $userId = get_current_user_id();
    }

    if (!is_sweepstake_subscriber($postId, $userId)) {
        global $wpdb;
        return (bool)$wpdb->insert(
            SweepstakePlugin::DB_TABLE_SUBSCRIBERS,
            array(
                'post_id' => $postId,
                'user_id' => $userId
            ),
            array( 
                '%d',
                '%d'
            ) 
        );
    }

    return false;
}

function get_sweepstake_winners($postId = null)
{
    if ($postId === null) {
        $postId = get_the_ID();
    }

    $winners = get_post_meta($postId, '_sweepstake_winner', true);
    if (!empty($winners)) {
        $winners = maybe_unserialize($winners);
    }
    if (!is_array($winners)) {
        $winners = array();
    }

    return $winners;
}

function get_sweepstake_enddate($postId = null)
{
    if ($postId === null) {
        $postId = get_the_ID();
    }

    $date = get_post_meta($postId, 'sweepstake_enddate', true);
    
    return empty($date) ? false : strtotime($date);
}

function is_sweepstake_running($postId = null)
{
    if ($postId === null) {
        $postId = get_the_ID();
    }

    $endTimestamp = get_sweepstake_enddate($postId);
    $time = mktime(0, 0, 0);

    return (bool)($endTimestamp && $endTimestamp >= $time);
}