class-admin-add-shortcode.php

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<?php
/**
 * Adds a button to add the View shortcode into the post content
 *
 * @package   GravityView
 * @license   GPL2+
 * @author    GravityView <[email protected]>
 * @link      http://gravityview.co
 * @copyright Copyright 2014, Katz Web Services, Inc.
 *
 * @since 1.0.0
 */

/** If this file is called directly, abort. */
if ( ! defined( 'ABSPATH' ) ) {
    die;
}

class GravityView_Admin_Add_Shortcode {

    function __construct() {

            add_action( 'media_buttons', array( $this, 'add_shortcode_button'), 30);

            add_action( 'admin_footer', array( $this, 'add_shortcode_popup') );

            // adding styles and scripts
            add_action( 'admin_enqueue_scripts', array( $this, 'add_scripts_and_styles') );

            // ajax - populate sort fields based on the selected view
            add_action( 'wp_ajax_gv_sortable_fields', array( $this, 'get_sortable_fields' ) );
    }


    /**
     * check if screen post editor and is not related with post type 'gravityview'
     *
     * @return bool
     */
    function is_post_editor_screen() {
        global $current_screen, $pagenow;
        return !empty( $current_screen->post_type ) && 'gravityview' != $current_screen->post_type && in_array( $pagenow , array( 'post.php' , 'post-new.php' ) );
    }


    /**
     * Add shortcode button to the Add Media right
     *
     * @return void
     */
    function add_shortcode_button() {

        /**
         * @since 1.15.3
         */
        if( ! GVCommon::has_cap( array( 'publish_gravityviews' ) ) ) {
            return;
        }

        if( !$this->is_post_editor_screen() ) {
            return;
        }
        ?>
        <a href="#TB_inline?width=600&amp;height=800&amp;inlineId=select_gravityview_view" class="thickbox hide-if-no-js button gform_media_link" id="add_gravityview" title="<?php esc_attr_e("Insert View", 'gk-gravityview'); ?>"><span class="icon gv-icon-astronaut-head"></span><?php esc_html_e( 'Add View', 'gk-gravityview' ); ?></a>
        <?php

    }



    /**
     * Add shortcode popup div
     *
     * @return void
     */
    function add_shortcode_popup() {
        global $post;

        if( !$this->is_post_editor_screen() ) {
            return;
        }

        $post_type = get_post_type_object($post->post_type);

        $views = get_posts( array('post_type' => 'gravityview', 'posts_per_page' => -1 ) );

        // If there are no views set up yet, we get outta here.
        if( empty( $views ) ) {
            echo '<div id="select_gravityview_view"><div class="wrap">' . GravityView_Admin::no_views_text() . '</div></div>';
            return;
        }

        ?>
        <div id="select_gravityview_view">
            <form action="#" method="get" id="select_gravityview_view_form">
                <div class="wrap">

                    <h2 class=""><?php esc_html_e( 'Embed a View', 'gk-gravityview' ); ?></h2>
                    <p class="subtitle"><?php printf( esc_attr ( __( 'Use this form to embed a View into this %s. %sLearn more about using shortcodes.%s', 'gk-gravityview') ), $post_type->labels->singular_name, '<a href="https://docs.gravityview.co/article/73-using-the-shortcode" target="_blank" rel="noopener noreferrer">', '</a>' ); ?></p>

                    <div>
                        <h3><label for="gravityview_id"><?php esc_html_e( 'Select a View', 'gk-gravityview' ); ?></label></h3>

                        <select name="gravityview_id" id="gravityview_id">
                            <option value=""><?php esc_html_e( '&mdash; Select a View to Insert &mdash;', 'gk-gravityview' ); ?></option>
                            <?php
                            foreach( $views as $view ) {
                                $title = empty( $view->post_title ) ? __('(no title)', 'gk-gravityview') : $view->post_title;
                                echo '<option value="'. $view->ID .'">'. esc_html( sprintf('%s #%d', $title, $view->ID ) ) .'</option>';
                            }
                            ?>
                        </select>
                    </div>

                    <table class="form-table hide-if-js">

                        <caption><?php esc_html_e( 'View Settings', 'gk-gravityview' ); ?></caption>

                        <?php

                        $settings = \GV\View_Settings::defaults( true );

                        foreach ( $settings as $key => $setting ) {

                            if( empty( $setting['show_in_shortcode'] ) ) { continue; }

                            GravityView_Render_Settings::render_setting_row( $key, array(), NULL, 'gravityview_%s', 'gravityview_%s' );
                        }
                        ?>

                    </table>

                    <div class="submit">
                        <input type="submit" class="button button-primary button-large alignleft hide-if-js" value="<?php esc_attr_e('Insert View', 'gk-gravityview' ); ?>" id="insert_gravityview_view" />
                        <input class="button button-secondary alignright" type="submit" onclick="tb_remove(); return false;" value="<?php esc_attr_e("Cancel", 'gk-gravityview'); ?>" />
                    </div>

                </div>
            </form>
        </div>
        <?php

    }




    /**
     * Enqueue scripts and styles
     *
     * @return void
     */
    function add_scripts_and_styles() {

        if( ! $this->is_post_editor_screen() ) {
            return;
        }

        wp_enqueue_style( 'dashicons' );

        // date picker
        wp_enqueue_script( 'jquery-ui-datepicker' );

        $protocol = is_ssl() ? 'https://' : 'http://';

        wp_enqueue_style( 'jquery-ui-datepicker', $protocol.'ajax.googleapis.com/ajax/libs/jqueryui/1.8.18/themes/smoothness/jquery-ui.css', array(), GV_PLUGIN_VERSION );

        //enqueue styles
        wp_register_style( 'gravityview_postedit_styles', plugins_url('assets/css/admin-post-edit.css', GRAVITYVIEW_FILE), array(), GV_PLUGIN_VERSION );
        wp_enqueue_style( 'gravityview_postedit_styles' );

        $script_debug = (defined('SCRIPT_DEBUG') && SCRIPT_DEBUG) ? '' : '.min';

        // custom js
        wp_register_script( 'gravityview_postedit_scripts',  plugins_url('assets/js/admin-post-edit'.$script_debug.'.js', GRAVITYVIEW_FILE), array( 'jquery', 'jquery-ui-datepicker' ), GV_PLUGIN_VERSION );
        wp_enqueue_script( 'gravityview_postedit_scripts' );
        wp_localize_script('gravityview_postedit_scripts', 'gvGlobals', array(
            'nonce' => wp_create_nonce( 'gravityview_ajaxaddshortcode'),
            'loading_text' => esc_html__( 'Loading&hellip;', 'gk-gravityview' ),
            'alert_1' => esc_html__( 'Please select a View', 'gk-gravityview'),
        ));

    }



    /**
     * Ajax
     * Given a View id, calculates the assigned form, and returns the form fields (only the sortable ones )
     *
     * @return void
     */
    function get_sortable_fields() {

        // Not properly formatted request
        if ( empty( $_POST['viewid'] ) || !is_numeric( $_POST['viewid'] ) ) {
            exit( false );
        }

        // Not valid request
        if( empty( $_POST['nonce'] ) || ! wp_verify_nonce( $_POST['nonce'], 'gravityview_ajaxaddshortcode' ) ) {
            exit( false );
        }

        $viewid = (int)$_POST['viewid'];

        // fetch form id assigned to the view
        $formid = gravityview_get_form_id( $viewid );

        // Get the default sort field for the view
        $sort_field = gravityview_get_template_setting( $viewid, 'sort_field' );

        // Generate the output `<option>`s
        $response = gravityview_get_sortable_fields( $formid, $sort_field );

        exit( $response );
    }

}

new GravityView_Admin_Add_Shortcode;