class-gravityview-plugin-hooks-gravitymaps.php

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<?php

/**
 * @inheritDoc
 * @since 2.16
 */
class GravityView_Plugin_Hooks_GravityMaps extends GravityView_Plugin_and_Theme_Hooks {
    public function __construct() {

        if ( ! defined( 'GRAVITYVIEW_MAPS_VERSION' ) || version_compare( GRAVITYVIEW_MAPS_VERSION, '1.8', '>=' ) ) {
            return;
        }

        /**
         * Temporarily keep maps working on the front-end when running new GV and old Maps.
         *
         * @since 2.16
         */
        add_filter( 'gravityview/maps/render/google_api_key', function( $api_key ) {

            if ( ! empty( $api_key ) ) {
                return $api_key;
            }

            $legacy_options = (array) get_option( 'gravityformsaddon_gravityview_app_settings' );

            return \GV\Utils::get( $legacy_options, 'googlemaps-api-key', '' );
        } );

        /**
         * @since 2.16
         * @param array $notices
         * @return array $notices, with a new notice about Maps compatibility added.
         */
        add_filter( 'gravityview/admin/notices', function ( $notices ) {

            $message = '<h3>' . esc_html__( 'Plugin update required.', 'gk-gravityview' ) . '</h3>';
            $message .= esc_html_x( 'You are using [plugin] [version] that is incompatible with the current version of GravityView. Please [link]update [plugin][/link] to the latest version.', 'Placeholders inside [] are not to be translated.', 'gk-gravityview' );

            $message = strtr( $message, array(
                '[version]' => GRAVITYVIEW_MAPS_VERSION,
                '[link]'    => '<a href="' . esc_url( GravityKitFoundation::licenses()->get_link_to_product_search( 27 ) ) . '">',
                '[plugin]'  => 'GravityView Maps',
                '[/link]'   => '</a>',
            ) );

            $notices[] = [
                'class'   => 'error',
                'message' => $message,
                'dismiss' => false,
            ];

            return $notices;
        } );
    }
}

new GravityView_Plugin_Hooks_GravityMaps;