class-gravityview-field-source-url.php

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<?php
/**
 * @file class-gravityview-field-source-url.php
 * @package GravityView
 * @subpackage includes\fields
 */

/**
 * Add custom options for source_url fields
 */
class GravityView_Field_Source_URL extends GravityView_Field {

    var $name = 'source_url';

    var $is_searchable = true;

    var $search_operators = array( 'is', 'isnot', 'contains', 'starts_with', 'ends_with' );

    var $group = 'meta';

    var $icon = 'dashicons-admin-links';

    public function __construct() {
        $this->label       = esc_html__( 'Source URL', 'gk-gravityview' );
        $this->description = esc_html__( 'The URL of the page where the form was submitted.', 'gk-gravityview' );
        parent::__construct();
    }

    public function field_options( $field_options, $template_id, $field_id, $context, $input_type, $form_id ) {

        // Don't link to entry; doesn't make sense.
        unset( $field_options['show_as_link'] );

        if( 'edit' === $context ) {
            return $field_options;
        }

        $add_options = array();
        $add_options['link_to_source'] = array(
            'type' => 'checkbox',
            'label' => __( 'Link to URL:', 'gk-gravityview' ),
            'desc' => __('Display as a link to the Source URL', 'gk-gravityview'),
            'value' => false,
            'merge_tags' => false,
        );
        $add_options['source_link_text'] = array(
            'type' => 'text',
            'label' => __( 'Link Text:', 'gk-gravityview' ),
            'desc' => __('Customize the link text. If empty, the link text will be the URL.', 'gk-gravityview'),
            'value' => NULL,
            'merge_tags' => true,
            'requires' => 'link_to_source',
        );

        return $add_options + $field_options;
    }

}

new GravityView_Field_Source_URL;