<?php

if ( ! class_exists( 'GFForms' ) ) {
    die();
}

class Optin_Field extends GF_Field_Checkbox {

    /**
     * @var string $type The field type.
     */
    public $type = 'optin';
    public $inputType = 'checkbox';

    /**
     * Return the field title, for use in the form editor.
     *
     * @return string
     */
    public function get_form_editor_field_title() {
        return esc_attr__( 'Email Opt-In', 'socialactionsaddon' );
    }

    /**
     * The scripts to be included in the form editor.
     *
     * @return string
     */
    public function get_form_editor_inline_script_on_page_render() {

        $script = sprintf( "function SetDefaultValues_%s(field) {
            field.label = 'Subscribe';
            field.choices = [new Choice('Subscribe to our Newsletter')];
            field.labelPlacement = 'hidden_label';
            }", $this->type ) . PHP_EOL;

        return $script;
    }
}

GF_Fields::register( new Optin_Field() );