woomoodle.php

<?php
/**
 * Plugin Name: WooMoodle
 * Description: Plugin allows to enter Moodle course details.
 * Version: 1.0
 * Author: Tõnis Tartes
 * Author URI: http://t6nis.com
 * License: GPL2
 */

/**
 * Check if WooCommerce is active
 **/
if ( !defined( 'ABSPATH' ) ) exit; // Exit if accessed directly

if (!in_array( 'woocommerce/woocommerce.php', apply_filters( 'active_plugins', get_option( 'active_plugins' ) ) ) ) { return; }
    
if ( !class_exists( 'WooMoodle' ) ) {
    
    class WooMoodle {
        var $order_id;
        var $order_status;
        
        public function __construct() {
            add_action('admin_enqueue_scripts', array($this, 'woomoodle_add_stylesheet'));
            add_action('woocommerce_product_write_panel_tabs', array($this, 'course_tab_options_tab'));
            add_action('woocommerce_product_write_panels', array($this, 'course_tab_options'));
            add_action('woocommerce_process_product_meta', array($this, 'process_product_meta_course_tab'));
            add_filter('woocommerce_order_number', array($this, 'course_order_details_completed'), 1, 1);
            add_filter('woocommerce_order_item_name', array($this, 'order_details_access_course'), 10, 2);
        }
        
        /**
         * Add stylesheet to the page
         */
        public function woomoodle_add_stylesheet() {
            wp_register_style('styles.css', plugin_dir_url( __FILE__ ) . 'styles.css');
            wp_enqueue_style('styles.css');
        }

        /**
         * Custom Tabs for Product display
         * 
         * Outputs an extra tab to the default set of info tabs on the single product page.
         */
        public function course_tab_options_tab() {
            ?> 
            <li class="course_tab"><a href="#course_tab_data"><img src="<?php echo plugins_url( 'images/icon.png' , __FILE__ ); ?>" alt="moodle_icon"></img><?php _e('Course details'); ?></a></li>
            <?php
        }
        /**
         * Custom Tab Options
         * 
         * Provides the input fields and add/remove buttons for custom tabs on the single product page.
         */
        public function course_tab_options() {
            global $post;

            $course_tab_options = array(
                'course_link_active' => get_post_meta($post->ID, 'course_link_active', true),
                'course_id' => get_post_meta($post->ID, 'course_id', true),
                'cohort_id' => get_post_meta($post->ID, 'course_cohort_id', true),
            );
            ?>
            <div id="course_tab_data" class="panel woocommerce_options_panel">
                <div class="options_group">
                    <p class="form-field">
                        <?php woocommerce_wp_checkbox( array( 'id' => 'course_link_active', 'label' => __('Course link active?', 'woothemes'), 'description' => __('Enable this option to show Moodle course link after purchase.') ) ); ?>
                    </p>
                </div>
                <div class="options_group course_tab_options">
                    <p class="form-field">
                        <label><?php _e('Course ID:'); ?></label>
                        <input type="text" size="5" name="course_id" value="<?php echo @$course_tab_options['course_id']; ?>" placeholder="<?php _e('Enter course id'); ?>" />
                    </p>
                </div>
                <div class="options_group course_tab_options">
                    <p class="form-field">
                        <label><?php _e('Cohort ID:'); ?></label>
                        <input type="text" size="5" name="course_cohort_id" value="<?php echo @$course_tab_options['cohort_id']; ?>" placeholder="<?php _e('Enter cohort id'); ?>" />
                    </p>
                </div>	
            </div>
            <?php
        }
        
        /**
         * Process meta
         * 
         * Processes the custom tab options when a post is saved
         */
        public function process_product_meta_course_tab( $post_id ) {
            update_post_meta( $post_id, 'course_link_active', ( isset($_POST['course_link_active']) && $_POST['course_link_active'] ) ? 'yes' : 'no' );
            update_post_meta( $post_id, 'course_id', $_POST['course_id']);
            update_post_meta( $post_id, 'course_cohort_id', $_POST['course_cohort_id']);
        }
        
        public function course_order_details_completed($order) {
            $orderid = str_replace('#', '', $order);
            $orderdata = new WC_Order($orderid);
            if ($orderdata->status == 'completed') {
                $this->order_id = $orderid;
                //$this->order_status = $orderdata->status;
            }            
            return $order;            
        }
        
        /*
         * Access course after prodcut title
         */
        public function order_details_access_course($html, $item) {
            global $post, $wpdb;

            $orderid = (!empty($this->order_id) ? $this->order_id : (!empty($_GET['order-received']) ? $_GET['order-received'] : (!empty($_GET['view-order']) ? $_GET['view-order'] : $_GET['order'])));

            if (!empty($orderid)) {
                $order = new WC_Order();
                $order->get_order($orderid);
                if ($order->status == 'completed') {
                    $product_id = $item['product_id'];

                    $course_link_active = get_post_meta($product_id, 'course_link_active', true);
                    if ($course_link_active == 'yes') {                    
                        $cohort_id = get_post_meta($product_id, 'course_cohort_id', true);
                        $course_id = get_post_meta($product_id, 'course_id', true);
                        $attributes = array('target' => '_blank');
                        if (!empty($cohort_id)) {
                            $attributes['cohort'] = $product_id; 
                        }
                        if (!empty($course_id)) {
                            $attributes['courseid'] = $course_id;
                        }
                        $course_link = ' ( '.moologin_handler($attributes, "Access course!").' )';
                        return $html.$course_link;
                    } else {
                        return $html;
                    }
                } else {
                    return $html;
                }
            }
            return $html;
        }
    }
    new WooMoodle();    
}

?>