Business Bloomer WooCommerce: Shipping Rates by Order Amount

<?php

/*
 * Plugin Name: Business Bloomer WooCommerce: Shipping Rates by Order Amount
 * Description: Provide Tiered Shipping where available shipping rates are based on order amount.
 * Plugin URI: https://www.businessbloomer.com/shop/plugins/woocommerce-tiered-shipping-rate-by-order-amount/
 * Update URI: https://www.businessbloomer.com/shop/plugins/woocommerce-tiered-shipping-rate-by-order-amount/
 * Author: Business Bloomer
 * Author URI: https://www.businessbloomer.com
 * Text Domain: bbloomer-woocommerce-shipping-rates-by-order-amount
 * Requires Plugins: woocommerce
 * Version: 0.1.20231027
 */

defined( 'ABSPATH' ) || exit;

include_once( ABSPATH . 'wp-admin/includes/plugin.php' );
if ( ! is_plugin_active( 'woocommerce/woocommerce.php' ) ) {
    return;
}

define( 'BBWSRBOA', 'https://www.businessbloomer.com/wp-json/bb/v1/downloads?product_id=XXXXXX' );

add_filter( 'plugin_action_links_' . plugin_basename( __FILE__ ), 'bbwsrboa_action_links', 9999, 4 );

function bbwsrboa_action_links( $links, $plugin_file, $plugin_data, $context ) {
    if ( ! isset( $plugin_data ) ) return $links;
    $plugin_links = array(
        '<a href="' . admin_url( 'admin.php?page=wc-settings&tab=shipping&section=options#bbwcofaw-start' ) . '">' . esc_html__( 'Settings', 'woocommerce' ) . '</a>',
        '<a href="' . $plugin_data['PluginURI'] . '#tab-docs" target="_blank">' . esc_html__( 'Docs', 'woocommerce' ) . '</a>',
        '<a href="https://businessbloomer.clarityflow.com/i/intake?title=' . rawurlencode( $plugin_data['Name'] ) . rawurlencode( ' ' ) . $plugin_data['Version'] . '" target="_blank">' . esc_html__( 'Premium Support', 'woocommerce' ) . '</a>',
        '<a href="' . $plugin_data['PluginURI'] . '#tab-reviews" target="_blank">' . esc_html__( 'Add a review', 'woocommerce' ) . '</a>',
    );
    return array_merge( $plugin_links, $links );
}

add_filter( 'plugin_row_meta', 'bbwsrboa_hide_view_details', 9999, 4 );

function bbwsrboa_hide_view_details( $plugin_meta, $plugin_file, $plugin_data, $status ) {
    if ( isset( $plugin_data['TextDomain'] ) && $plugin_data['TextDomain'] == plugin_basename( __DIR__ ) ) unset( $plugin_meta[2] );
    return $plugin_meta;
}

add_filter( 'plugins_api', 'bbwsrboa_plugin_view_version_details', 9999, 3 );

function bbwsrboa_plugin_view_version_details( $res, $action, $args ) {
    if ( 'plugin_information' !== $action ) return $res;
    if ( $args->slug !== plugin_basename( __DIR__ ) ) return $res;
    $response = wp_remote_get( BBWSRBOA, array(  'headers' => array( 'Accept' => 'application/json' ) ) );
    if ( ( ! is_wp_error( $response ) ) && ( 200 === wp_remote_retrieve_response_code( $response ) ) ) {
        $download = json_decode( wp_remote_retrieve_body( $response ), true );
    } else return $res;
    $res = new stdClass();
    $res->name = $download['name'];
    $res->slug = plugin_basename( __DIR__ );
    $res->path = plugin_basename( __DIR__ ) . '/' . plugin_basename( __DIR__ ) . '.php';
    $res->version = $download['version'];
    $res->download_link = $download['download_link'];
    $res->sections = array(
        'description' => $download['description'],
    );
    return $res;
}

add_filter( 'update_plugins_www.businessbloomer.com', function( $update, array $plugin_data, string $plugin_file, $locales ) {
    if ( $plugin_file !== plugin_basename( __DIR__ ) . '/' . plugin_basename( __DIR__ ) . '.php' ) return $update;    if ( ! empty( $update ) ) return $update;
    $response = wp_remote_get( BBWSRBOA, array(  'headers' => array( 'Accept' => 'application/json' ) ) );
    if ( ( ! is_wp_error( $response ) ) && ( 200 === wp_remote_retrieve_response_code( $response ) ) ) {
        $download = json_decode( wp_remote_retrieve_body( $response ), true );
    } else return $update;
    if ( ! version_compare( $plugin_data['Version'], $download['version'], '<' ) ) return $update;
    return [
        'slug' => plugin_basename( __DIR__ ),
        'version' => $download['version'],
        'url' => $plugin_data['PluginURI'],
        'package' => $download['download_link'],
    ];
}, 9999, 4 );

// Return the wp_options option names - used in a number of functions.
function bbwsrboa_settings_option_name() {
    return 'bb_srboa';
}

// Verify and save the information submitted in the settings form.
add_action( 'admin_init', 'bbwsrboa_save_method_thresholds' );

function bbwsrboa_save_method_thresholds() {
    if ( isset( $_GET['page'], $_GET['tab'], $_GET['section'], $_POST['_wpnonce'] )
        && 'wc-settings' == $_GET['page'] && 'shipping' == $_GET['tab'] && 'options' == $_GET['section'] && wp_verify_nonce( $_POST['_wpnonce'], 'woocommerce-settings' ) ) {
        if ( current_user_can( 'manage_woocommerce' ) ) {
            $default_options = array();  // Allow for default options in the future.
            $stored_options = get_option( bbwsrboa_settings_option_name(), array() );
            $bbaccpc_options = wp_parse_args( $stored_options, $default_options );

            // ToDo: Should $bbaccpc_options be emptied before processing submitted data?
            // Not emptying it could result in old shipping methods values never being deleted.
            $methods_found = 0;

            foreach ( $_POST as $key => $value ) {
                if ( 0 === strpos( $key, 'flat_rate:' ) ) {
                    $threshold = absint( sanitize_text_field( $value ) );
                    if ( $threshold ) {
                        $bbaccpc_options[ $key ] = $threshold;
                        $methods_found++;
                    }
                }
            }

            if ( $methods_found ) {
                update_option( bbwsrboa_settings_option_name(), $bbaccpc_options );
            }
        }
    }
}

// Settings section displayed in WooCommerce/Settings/Advanced.
add_action( 'woocommerce_settings_shipping', 'bbwsrboa_settings_fields', 20 );

function bbwsrboa_settings_fields( $email_obj ) {
    $plugin_data = get_plugin_data( WP_PLUGIN_DIR . '/' . plugin_basename( __FILE__ ) );
    $quick_links = bbwsrboa_action_links( array(), '', $plugin_data, '' );
    array_shift( $quick_links );

    if ( isset( $_GET['section'] ) && 'options' == $_GET['section'] ) {
        echo '<div id="bbwcofaw-start" style="border: 2px dashed red; background: #fae6e6; padding: 0 2em 1em;"><h2>', $plugin_data['Name'], ' <small>v ', $plugin_data['Version'], '</small></h2>';
        echo '<p>' . $plugin_data['Description'] . '</p>';
        echo '<h4>Quick links: ' . implode( ' - ', $quick_links ) . '</h4>';
        echo '<table class="form-table"><tbody>';

        $default_options = array();  // Allow for default options in the future.
        $stored_options = get_option( bbwsrboa_settings_option_name(), array() );
        $bbaccpc_options = wp_parse_args( $stored_options, $default_options );

        // Display help for creating shipping zones.
        echo '<details><summary><strong>', esc_html__( 'How to set up Shipping Zones', 'bbloomer-woocommerce-shipping-rates-by-order-amount' ). '</strong></summary>';
        echo '<p>', esc_html__( 'Read the WooCommerce documentation on <a href="https://woocommerce.com/document/setting-up-shipping-zones/" target="_blank">setting up Shipping Zones</a>.', 'bbloomer-woocommerce-shipping-rates-by-order-amount' ), '</p>';
        echo '</details>';

        $options = array();

        $zones = WC_Shipping_Zones::get_zones();
        foreach ( $zones as $zone ) {
            foreach ( $zone['shipping_methods'] as $index => $method ) {
                // Skip shipping methods that are not Flat Rate.
                if ( 'flat_rate' != $method->id ) { continue; }

                $field_id = $method->id . ':' . $index;
                // Number field for shipping method.
                $value = null;
                if ( isset( $bbaccpc_options[ $field_id ] ) ) { $value = $bbaccpc_options[ $field_id ]; }
                $args = array(
                            //'title'       => sprintf( '%s: %s %s', esc_html__( 'Method title', 'woocommerce' ), $zone['zone_name'], $method->title ),
                            'title'       => esc_html( sprintf( '%s: %s', $zone['zone_name'], $method->title ) ),
                            'desc'        => esc_html__( 'Enter the maximum cart amount to offer this shipping method.', 'bbloomer-woocommerce-shipping-rates-by-order-amount' ),
                            'id'          => $field_id,
                            'placeholder' => esc_html__( 'Enter maximum cart amount', 'bbloomer-woocommerce-shipping-rates-by-order-amount' ),
                            'type'        => 'number',
                            'value'       => $value,
                            'autoload'    => false,
                        );
                $options[] = $args;
            }
        }

        // Render the fields.
        if ( count( $options ) ) {
            echo woocommerce_admin_fields( $options );
        }
        else {
            echo '<p>', esc_html__( 'There are no Flat Rate shipping methods. Please create some.', 'bbloomer-woocommerce-shipping-rates-by-order-amount' ), '</p>';
        }

        echo '</tr>';

        echo '</tbody></table>';
        echo '<p class="submit"><a id="bbacppcsave" class="button-primary">', esc_html__( 'Save changes', 'woocommerce' ), '</a></p>';
        echo '</div>';

        wc_enqueue_js( "
            $('#bbacppcsave').click(function(e){
                e.preventDefault();
                $('.button-primary.woocommerce-save-button').trigger('click');
            });
        " );
    }
}


add_filter( 'woocommerce_package_rates', 'bbwsrboa_apply_tiered_shipping', 10, 2 );

function bbwsrboa_apply_tiered_shipping( $rates, $package ) {
        $default_options = array();  // Allow for default options in the future.
        $stored_options = get_option( bbwsrboa_settings_option_name(), array() );
        $bbaccpc_options = wp_parse_args( $stored_options, $default_options );

        $cart_subtotal = WC()->cart->subtotal;
        foreach ( $bbaccpc_options as $method => $threshold ) {
            if ( $cart_subtotal >= $threshold ) {
                unset( $rates[ $method ] );
            }
        }

        return $rates;
}