class-gravityview-field-entry-link.php

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

/**
 * Add custom options for entry_link fields
 */
class GravityView_Field_Entry_Link extends GravityView_Field {

    var $name = 'entry_link';

    var $contexts = array( 'multiple' );

    /**
     * @var bool
     * @since 1.15.3
     */
    var $is_sortable = false;

    /**
     * @var bool
     * @since 1.15.3
     */
    var $is_searchable = false;

    var $group = 'gravityview';

    var $icon = 'dashicons-media-default';

    public function __construct() {
        $this->label = esc_html__( 'Link to Single Entry', 'gk-gravityview' );
        $this->description = esc_html__('A dedicated link to the single entry with customizable text.', 'gk-gravityview');
        parent::__construct();
    }

    /**
     * Add as a default field, outside those set in the Gravity Form form
     *
     * @since 2.10 Moved here from GravityView_Admin_Views::get_entry_default_fields
     *
     * @param array $entry_default_fields Existing fields
     * @param string|array $form form_ID or form object
     * @param string $zone Either 'single', 'directory', 'edit', 'header', 'footer'
     *
     * @return array
     */
    public function add_default_field( $entry_default_fields, $form = array(), $zone = '' ) {

        if ( 'directory' !== $zone ) {
            return $entry_default_fields;
        }

        $entry_default_fields[ $this->name ] = array(
            'label' => $this->label,
            'type'  => $this->name,
            'desc'  => $this->description,
            'icon'  => $this->icon,
        );

        return $entry_default_fields;
    }

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

        // Always a link!
        unset( $field_options['show_as_link'], $field_options['search_filter'] );

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

        $add_options = array();
        $add_options['entry_link_text'] = array(
            'type' => 'text',
            'label' => __( 'Link Text:', 'gk-gravityview' ),
            'desc' => NULL,
            'value' => __('View Details', 'gk-gravityview'),
            'merge_tags' => true,
        );

        $this->add_field_support( 'new_window', $field_options );

        return $add_options + $field_options;
    }

}

new GravityView_Field_Entry_Link;