<?php
/**
 * Plugin Name: 4Seller Tracking Number Manager for WooCommerce
 * Description: Manage and display carrier and tracking number information in WooCommerce order admin, customer order pages, and emails.
 * Version: 1.0.10
 * Requires at least: 4.9
 * Requires PHP: 7.0
 * Requires Plugins: woocommerce
 * WC requires at least: 3.0
 * Author: 4Seller
 * Author URI: https://www.4Seller.com/
 * Text Domain: 4seller-tracking-number-manager
 * License: GPLv2 or later
 * License URI: https://www.gnu.org/licenses/gpl-2.0.html
 *
 * Copyright: 4Seller
 */

/**
 * Security Note
 */
defined('ABSPATH') or die("No script kiddies please!");
define( 'FOUR_SELLER_VERSION', '1.0.10' );

/**
 * Required functions
 */
require_once __DIR__ . '/woo-includes/woo-functions.php';

/**
 * Plugin updates
 */

if (four_seller_is_woocommerce_active()) {

    /**
     * 4Seller class
     */
    if (!class_exists( 'Four_Seller_Plugin' )) {

        final class Four_Seller_Plugin
        {
            public $four_seller_fields;

            public $options = array();

            public $plugin_file;

            public $plugin_dir;

            public $plugin_url;

            public $couriers = array();

            protected static $_instance = null;

            public static function instance()
            {
                if (is_null(self::$_instance)) {
                    self::$_instance = new self();
                }
                return self::$_instance;
            }


            /**
             * Constructor
             */
            public function __construct()
            {
                $this->includes();
                $this->plugin_file = __FILE__;
                $this->plugin_dir  = untrailingslashit( plugin_dir_path( __FILE__ ) );
                $this->plugin_url  = untrailingslashit( plugin_dir_url( __FILE__ ) );

                $options = get_option('4Seller_option_name');
                if (!is_array($options)) {
                    $options = array();
                }

                $this->couriers = isset($options['couriers']) ? $options['couriers'] : '';

                add_action('admin_print_scripts', array(&$this, 'library_scripts'));
                add_action('in_admin_footer', array(&$this, 'include_footer_script'));
                add_action('admin_print_styles', array(&$this, 'admin_styles'));
                add_action('add_meta_boxes', array(&$this, 'add_meta_box'));
                add_action('woocommerce_process_shop_order_meta', array(&$this, 'save_meta_box'), 0, 2);
                add_filter( 'manage_shop_order_posts_columns', array(&$this, 'shop_order_columns' ), 99 );
                add_action( 'manage_shop_order_posts_custom_column', array(&$this, 'render_shop_order_columns' ) );
                add_filter( 'manage_woocommerce_page_wc-orders_columns', array(&$this, 'shop_order_columns' ), 99 );
                add_action( 'manage_woocommerce_page_wc-orders_custom_column', array(&$this, 'render_wc_orders_list_columns' ), 10, 2 );
                add_action('woocommerce_view_order', array(&$this, 'display_tracking_info'));
                add_action('woocommerce_email_before_order_table', array(&$this, 'email_display'), 10, 4);

            }

            private function includes()
            {
	            global $four_seller_fields;
	            include_once __DIR__ . '/includes/4Seller-fields.php';
                $this->four_seller_fields = $four_seller_fields;
                include_once __DIR__ . '/includes/class-4Seller-settings.php';
            }

            public function admin_styles()
            {
                if (wp_style_is('select2', 'registered')) {
                    wp_enqueue_style('select2');
                }
                wp_enqueue_style('4Seller_styles', $this->plugin_url . '/assets/css/admin.css', array(), FOUR_SELLER_VERSION);
            }

            public function library_scripts()
            {
                if (wp_script_is('selectWoo', 'registered')) {
                    wp_enqueue_script('selectWoo');
                }
                wp_enqueue_script('4Seller_script_util', $this->plugin_url . '/assets/js/util.js', array('jquery'), FOUR_SELLER_VERSION, true);
                wp_enqueue_script('4Seller_script_couriers', $this->plugin_url . '/assets/js/couriers.js', array('jquery'), FOUR_SELLER_VERSION, true);
                wp_enqueue_script('4Seller_script_admin', $this->plugin_url . '/assets/js/admin.js', array('jquery'), FOUR_SELLER_VERSION, true);
            }
            public function include_footer_script()
            {
                wp_enqueue_script('4Seller_script_footer', $this->plugin_url . '/assets/js/footer.js', array(), FOUR_SELLER_VERSION, true);
            }

            /**
             * Add the meta box for shipment info on the order page
             *
             * @access public
             */
            public function add_meta_box()
            {
                add_meta_box('woocommerce-4Seller', __('4Seller', '4seller-tracking-number-manager'), array( $this, 'meta_box' ), four_seller_get_order_admin_screen(), 'side', 'high');
            }

            /**
             * Show the meta box for shipment info on the order page
             *
             * @access public
             */
            public function meta_box($post)
            {
                if ($post instanceof WC_Order) {
                    $order = $post;
                } else {
                    $order_id = isset($post->ID) ? $post->ID : 0;
                    $order = wc_get_order($order_id);
                }

                if (!$order) {
                    return;
                }

                $selected_provider = $order->get_meta("_4Seller_tracking_provider");
                echo '<div id="4Seller_wrapper">';
                wp_nonce_field('save_4Seller_tracking', '4Seller_tracking_nonce');
                echo '<p class="form-field"><label for="4Seller_tracking_provider">' . 'Carrier:' . '</label><br/><select id="4Seller_tracking_provider" name="4Seller_tracking_provider" class="wc-enhanced-select" style="width:100%">';
                if ($selected_provider == '') {
                    $selected_text = 'selected="selected"';
                } else {
                    $selected_text = '';
                }
                echo '<option disabled ' . esc_html($selected_text) . ' value="">Please Select</option>';
                echo '</select>';
                echo '<br><a href="' . esc_url(admin_url('options-general.php?page=4Seller-setting-admin')) . '">Update carrier list</a>';
                echo '<input type="hidden" id="4Seller_tracking_provider_hidden" value="' . esc_attr($selected_provider) . '"/>';
                echo '<input type="hidden" id="4Seller_couriers_selected" value="' . esc_attr($this->couriers) . '"/>';
                foreach ($this->four_seller_fields as $field) {
                    $wrapper_class = '';
                    if (strpos($field['class'], 'hidden-field') !== false || $field['class'] === 'hidden') {
                        $wrapper_class = '4seller-hidden-field';
                    }
                    if ($field['type'] == 'date') {
                        woocommerce_wp_text_input(array(
                            'id' => $field['id'],
                            'label' => $field['label'],
                            'placeholder' => $field['placeholder'],
                            'description' => $field['description'],
                            'class' => $field['class'],
                            'wrapper_class' => $wrapper_class,
                            'value' => ($date = $order->get_meta('_' . $field['id'])) ? gmdate('Y-m-d', $date) : ''
                        ));
                    } else {
                        woocommerce_wp_text_input(array(
                            'id' => $field['id'],
                            'label' => $field['label'],
                            'placeholder' => $field['placeholder'],
                            'description' => $field['description'],
                            'class' => $field['class'],
                            'wrapper_class' => $wrapper_class,
                            'value' => $order->get_meta('_' . $field['id']),
                        ));
                    }
                }
                echo '</div>';
            }

            /**
             * Order Downloads Save
             *
             * Function for processing and storing all order downloads.
             */
            public function save_meta_box($post_id, $post = null)
            {
                if (defined('DOING_AUTOSAVE') && DOING_AUTOSAVE) {
                    return;
                }

                $nonce = isset($_POST['4Seller_tracking_nonce']) ? sanitize_text_field(wp_unslash($_POST['4Seller_tracking_nonce'])) : '';
                if (!$nonce || !wp_verify_nonce($nonce, 'save_4Seller_tracking')) {
                    return;
                }

                if (!current_user_can('edit_shop_order', $post_id) && !current_user_can('edit_post', $post_id)) {
                    return;
                }

                $tracking_number_raw = filter_input(INPUT_POST, '4Seller_tracking_number', FILTER_UNSAFE_RAW);
                if (null !== $tracking_number_raw) {
                    $order = wc_get_order( $post_id );
                    if (!$order) {
                        return;
                    }

                    $tracking_provider_raw = filter_input(INPUT_POST, '4Seller_tracking_provider', FILTER_UNSAFE_RAW);
                    $tracking_provider = null !== $tracking_provider_raw ? wc_clean(wp_unslash($tracking_provider_raw)) : '';
                    $tracking_number = wc_clean(wp_unslash($tracking_number_raw));

                    $order->update_meta_data( '_4Seller_tracking_provider', $tracking_provider );
                    $order->update_meta_data( '_4Seller_tracking_number', $tracking_number );

                    foreach ($this->four_seller_fields as $field) {
                        $field_id = isset($field['id']) ? (string) $field['id'] : '';
                        $field_raw = $field_id ? filter_input(INPUT_POST, $field_id, FILTER_UNSAFE_RAW) : null;
                        $field_value = null !== $field_raw ? wc_clean(wp_unslash($field_raw)) : '';
                        if ($field['type'] == 'date') {
                            $order->update_meta_data( '_' . $field['id'], $field_value ? strtotime($field_value) : '' );
                        } else {
                            $order->update_meta_data( '_' . $field['id'], $field_value );
                        }
                    }
                    if (four_seller_custom_orders_table_usage_is_enabled()) {
                        $order->save();
                    } else {
                        $order->save_meta_data();
                    }
                }
            }

            /**
             * Display Shipment info in the frontend (order view/tracking page).
             *
             * @access public
             */
            function display_tracking_info($order_id, $for_email = false, $plain_text = false)
            {
                $this->display_order($order_id, $for_email, $plain_text);
            }

	        /**
	         * Define shipment tracking column in admin orders list.
	         *
	         * @param array $columns Existing columns
	         *
	         * @return array Altered columns
	         */
	        public function shop_order_columns( $columns ) {
		        $add_index = array_search( 'order_number', array_keys( $columns ) ) + 1;
		        $pre_array = array_splice( $columns, 0, $add_index );
		        $array     = array(
			        '4Seller_traccking_no' => "Tracking No"
		        );
		        return array_merge( $pre_array, $array, $columns );
	        }

	        /**
	         * Render shipment tracking in custom column.
	         *
	         * @param string $column Current column
	         */
	        public function render_shop_order_columns( $column ) {
		        global $post;
		        if ( '4Seller_traccking_no' === $column ) {
			        echo wp_kses_post( $this->get_tracking_column( $post->ID ) );
		        }
	        }

            public function render_wc_orders_list_columns( $column_name, $order ) {
                if ( '4Seller_traccking_no' === $column_name ) {
                    echo wp_kses_post( $this->get_tracking_column( $order->get_id() ) );
                }
            }

	        public function get_tracking_no( $order_id ) {
		        if ( version_compare( WC_VERSION, '3.0', '<' ) ) {
			        $tracking_no = get_post_meta( $order_id, '_4Seller_tracking_number', true );
		        } else {
			        $order = wc_get_order( $order_id );
                    $tracking_no = $order ? $order->get_meta( '_4Seller_tracking_number' ) : '';
		        }
		        return $tracking_no;
	        }

	        public function get_tracking_column( $order_id ) {
		        $tracking_no = $this->get_tracking_no( $order_id );
		        if (!empty($tracking_no)) {
			        return esc_html($tracking_no);
		        } else {
                    return '-';
                }
	        }

	        private function display_order($order_id, $for_email, $plain_text = false)
            {
                $values = array();
                $order = wc_get_order($order_id);
                if (!$order) {
                    return;
                }
                foreach ($this->four_seller_fields as $field) {
                    $values[$field['id']] = $order->get_meta('_' . $field['id']);
                    if ($field['type'] == 'date' && $values[$field['id']]) {
                        $values[$field['id']] = date_i18n(__('l jS F Y', '4seller-tracking-number-manager'), $values[$field['id']]);
                    }
                }
                $values['4Seller_tracking_provider'] = $order->get_meta('_4Seller_tracking_provider');

                if (!$values['4Seller_tracking_number'])
                    return;


                $options = get_option('4Seller_option_name');
                if (!is_array($options)) {
                    $options = array();
                }
                if (array_key_exists('track_message_1', $options) && array_key_exists('track_message_2', $options)) {
                    $track_message_1 = $options['track_message_1'];
                    $track_message_2 = $options['track_message_2'];
                } else {
                    $track_message_1 = 'Your order was shipped via ';
                    $track_message_2 = 'Tracking number is ';
                }

                $required_fields_values = array();
                $provider_required_fields = explode(",", $values['4Seller_tracking_required_fields']);

                for ($i = 0; $i < count($provider_required_fields); $i++) {
                    $field = $provider_required_fields[$i];
                    foreach ($this->four_seller_fields as $four_seller_field) {
                        if (array_key_exists('key', $four_seller_field) && $field == $four_seller_field['key']) {
                            if (!empty($values[$four_seller_field['id']])) {
                                array_unshift($required_fields_values, $values[$four_seller_field['id']]);
                            }
                        }
                    }
                }

                if (count($required_fields_values)) {
                    $required_fields_msg = ' (' . join(', ', $required_fields_values) . ')';
                } else {
                    $required_fields_msg = '';
                }

                $tracking_provider_name = $values['4Seller_tracking_provider_name'] ? $values['4Seller_tracking_provider_name'] : $values['4Seller_tracking_provider'];
                $tracking_url = $this->get_tracking_url($values['4Seller_tracking_provider'], $values['4Seller_tracking_number']);

                if ($plain_text) {
                    if ($tracking_provider_name) {
                        echo esc_html($track_message_1 . $tracking_provider_name) . "\n";
                    }
                    echo esc_html($track_message_2 . $values['4Seller_tracking_number'] . $required_fields_msg) . "\n";
                    echo esc_url($tracking_url) . "\n";
                    return;
                }

	            echo '<section class="woocommerce-4seller-tracking">';
                if ($tracking_provider_name) {
                    echo esc_html($track_message_1 . $tracking_provider_name) . '<br/>';
                }
                echo esc_html($track_message_2) . '<a target="_blank" rel="noopener noreferrer" href="' . esc_url($tracking_url) . '">' . esc_html($values['4Seller_tracking_number']) . '</a>.' . esc_html($required_fields_msg);
                echo '</section>';

            }

            /**
             * Display shipment info in customer emails.
             *
             * @access public
             * @return void
             */
            function email_display($order, $sent_to_admin = false, $plain_text = false, $email = null)
            {
                $order_id = is_object($order) && method_exists($order, 'get_id') ? $order->get_id() : (isset($order->id) ? $order->id : 0);
                $this->display_tracking_info($order_id, true, $plain_text);
            }

            private function get_tracking_url($tracking_provider, $tracking_number)
            {
                $tracking_number = (string) $tracking_number;
                return 'https://t.17track.net/zh-cn#nums=' . rawurlencode($tracking_number) . '&pf=wc_d&pf_c=' . rawurlencode((string) $tracking_provider);
            }
        }

        if (!function_exists( 'four_seller_get_instance' )) {
            function four_seller_get_instance()
            {
                return Four_Seller_Plugin::Instance();
            }
        }
    }

    /**
     * Register this class globally
     */
    $GLOBALS['4Seller'] = four_seller_get_instance();
}