myongkir-shipping.php

<?php
/**
 * @package myongkir
 * @category Core
 * @author eezhal
 */

require_once 'class/cart-weight.php';

class MyOngkir_Shipping_Method extends WC_Shipping_Method {
    /**
     * Constructor for shipping class
     *
     * @access public
     * @return void
     */
    public function __construct() {
        $this->id                 = 'myongkir_shipping'; // Id for your shipping method. Should be uunique.
        $this->method_title       = __( 'MyOngkir Method' );  // Title shown in admin
        $this->method_description = __( 'WooCommerce add-on for indonesian local shipping.'); // Description shown in admin

        $this->init();
    }

    /**
     * Init your settings
     *
     * @access public
     * @return void
     */
    public function init() {
        // Load the settings API
        // This is part of the settings API. Override the method to add your own settings
        $this->init_form_fields();

        // This is part of the settings API. Loads settings you previously init.
        $this->init_settings();

        // This can be added as an setting but for this example its forced.
        $this->title = "MyOngkir Shipping Method";
        // if api key not setted, enabled = false

        $this->enabled = !isset($this->settings['enabled'])? true : $this->settings['enabled'] ;
        $this->api_key = !isset($this->settings['api_key'])? null : $this->settings['api_key'] ;
        $this->base_city = !isset($this->settings['base_city'])? null : $this->settings['base_city'];

        global $woocommerce;
        global $myongkir;

        // handle frontend cost request
        add_action( 'wp_ajax_get_costs', 'calculate_shipping' );

        // Save settings in admin if you have any defined
        add_action( 'woocommerce_update_options_shipping_' . $this->id, array( $this, 'process_admin_options' ) );

        add_action( 'woocommerce_review_order_before_shipping', array( $this, 'generate_cart_weight_row'));


    }


    /**
     * Generate html settings form
     *
     * @return void
     */
    public function admin_options() {
    ?>
        <h2><?php _e('MyOngkir Shipping', 'woocommerce'); ?></h2>
        <table class="form-table">
            <?php
                $rajaongkir_api = get_option('woocommerce_rajaongkir_api_key');

                if ( !$this->isset_rajaongkir_api() ) {
            ?>
                <div id="message" class="error fade"><p><strong>Please Set RajaOngkir API Key first, on woocommerce general settings.</strong></p></div>
            <?php
                } else {
                     $this->generate_settings_html();
                }
            ?>
        </table>
    <?php
    }

    /**
     * Form for shipping method settings in admin
     *
     * @return void
     */
    public function init_form_fields() {
        global $woocommerce;
        global $myongkir;

        if ( $this->isset_rajaongkir_api() ) {
            $this->form_fields = array(
                'enabled' => array(
                    'title'   => 'Enable/Disable',
                    'type'    => 'checkbox',
                    'default' => 'no',
                    'label'   => 'Enable this shipping method',

                    ),
                'base_city' => array(
                    'title'       => __( 'Your Base City', 'woocommerce' ),
                    'type'        => 'select',
                    'id'          => 'woocommerce_myongkir_base_city',
                    'class'       => 'chosen_select',
                    'description' => __( 'This is your store location, used for origin package. Require api key is setted, before showing available city.', 'woocommerce' ),
                    'options'     => $myongkir->get_cities( $woocommerce->countries->get_base_state() )
                    ),
                'courier' => array(
                    'title'       => __( 'Your couriers', 'woocommerce' ),
                    'type'        => 'select',
                    'id'          => 'woocommerce_myongkir_couriers',
                    'class'       => 'chosen_select',
                    'description' => __( 'This is the avaibility of yours couriers', 'woocommerce' ),
                    'options' => array(
                        'all' => 'All',
                        'jne' => 'JNE',
                        'pos' => 'POS',
                        'tiki'=>'Tiki',
                    ),
                ),
            );
        }
    }

    /**
     * Add cart weight total before shipping in chekout form
     *
     * @return void
     */
    public function generate_cart_weight_row()
    {
        echo '<tr class="order-total">';
        echo   '<th>Weight Total</th>';
        echo     '<td><strong><span class="amount">';
        echo        $this->get_cart_weight() . ' ' . get_option( 'woocommerce_weight_unit' );
        echo     '</span></strong></td>';
        echo '</tr>';
    }

    /**
     * Calculate shipping cost in checkout form.
     *
     * @access public
     * @param mixed $package
     * @return void
     */
    public function calculate_shipping( $package = array() ) {
        global $woocommerce;
        global $myongkir;

        $current_shipping_city = $woocommerce->customer->get_shipping_city();
        $current_cart_weight = $this->get_cart_weight(true); // in gram
        $courier = $this->settings['courier'];
        $shipping_couriers = array(); // results

        switch ( $courier ) {
            case 'jne':
            case 'tiki':
            case 'pos':
                $shipping_couriers = $this->get_available_shippings(
                    $current_shipping_city,
                    $current_cart_weight,
                    $courier
                );

                break;
            default:
                $couriers = ['jne', 'tiki', 'pos'];

                foreach ( $couriers as $courier ) {
                    $result = $this->get_available_shippings(
                        $current_shipping_city,
                        $current_cart_weight, $courier
                    );

                    $shipping_couriers[] = $result[0];
                }

                break;
        }

        if ( ! empty($shipping_couriers) ) {
            foreach ( $shipping_couriers as $courier ) {
                foreach ( $courier['costs'] as $item ) {
                    foreach ( $item['cost'] as $cost ) {
                        $this->add_rate(
                            array(
                                'id' => $this->id . "_" . $courier['name'] . "_" . $item['service'] ,
                                'label' => $courier['name'] . " " . $item['service'],
                                'cost' => $cost['value'],
                                'calc_tax' => 'per_item'
                            )
                        );
                    }
                }
            }
        }

    }

    /**
     * Determine whether Raja Ongkir key is set or not.
     *
     * @return bool
     */
    private function isset_rajaongkir_api() {
        $rajaongkir_api = get_option('woocommerce_rajaongkir_api_key');

        if( $rajaongkir_api == '' || $rajaongkir_api == null) {
            return false;
        }

        return true;
    }

    /**
     * Get current cart weight.
     *
     * @param bool $to_gram
     * @return int
     */
    private function get_cart_weight($to_gram = false)
    {
        global $woocommerce;

        $current_cart_weight = $woocommerce->cart->cart_contents_weight;
        $minimum_weight = get_option('woocommerce_myongkir_minimum_weight');

        // if woocommerce_myongkir_minimum_weight value not set
        if (! $minimum_weight) {
            $minimum_weight = 1;
        }

        if ($current_cart_weight < $minimum_weight) {
            $current_cart_weight = $minimum_weight;
        }

        // if flag is true, convert to gram and return it
        if ($to_gram) {
            $weight_unit = get_option('woocommerce_weight_unit');

            return CartWeight::toGram($current_cart_weight, $weight_unit);
        }

        return $current_cart_weight;
    }

    /**
     * Get available shippings based on store city and customer city
     *
     * @param int $shipping_city
     * @param int $cart_weight
     * @param string $courier
     * @return array
     */
    private function get_available_shippings( $shipping_city, $cart_weight, $courier ) {
        if ( $origin_city = $this->settings['base_city'] ) {
            global $myongkir;

            return $myongkir->get_costs(
                $origin_city,
                $shipping_city,
                $cart_weight,
                $courier
            );
        }

        echo $this->settings['base_city'];
        // break shipping calculation if origin city not (base_city) set
        echo "DEBUG: Break shipping calculation if origin city not (base_city) set <br>";
        var_dump($this->settings['base_city']);

    }
}

?>