add_shortcode('publish_party', 'party_contact_suppliers');

function party_contact_suppliers(){
    $alerts = new WP_Query (array (
        'post_type'    => 'alert',
        'post_status' => 'publish'));
    $address_cache = get_option( 'toolset_maps_address_coordinates' );

    // Ballito
    $home_lat = -29.4872902;
    $home_lon = 31.1613188;
    echo '<h3>Ballito</h3>';
    echo '<ol>';
    while($alerts->have_posts()) {
        $alerts->the_post();
        $id = get_the_ID();
        $author = get_the_author();
        $author_id = get_the_author_id();
        $emailaddress = the_author_meta('user_email',$author_id);
        $center_location = get_post_meta($id,'wpcf-center-location',true);
        $radius = get_post_meta($id,'wpcf-radius',true);
        $lat = 0;
        $lon = 0;
        foreach ($address_cache as $key => $value) {
            if ( $value['address_passed'] == $center_location ) {
                $lat = $value['lat'];
                $lon = $value['lon'];
                break;
            }
        }
        $distance = distance($lat,$lon,$home_lat,$home_lon);
        echo '<li>';
        echo '<p>Alert Post ID: '.$id.' Author Name:'.$author.' Author ID: '.$author_id.' Email Address: '.$emailaddress.'</p>';
        echo '<p>Author location: '.$center_location.' Lat: '.$lat.' Long: '.$lon.' Distance: '.$distance.'Kms</p>';
        if ($distance <= $radius) {
            echo '<p style="color:green">Distance is within radius of '.$radius.' Kms. Send email to '.$emailaddress.'</p>';
        }
        else { echo '<p style="color:red">Distance is not within radius of '.$radius.' Kms.</p>';}
        echo '</li>';
    }
    echo '</ol>';
    wp_reset_postdata();
}