~NAXC~

File Content: `CodeField.php`

<?php
/**
 * Defines a field intended for raw input of code snippets
 *
 * @package  Roar
 * @author   LION Interactive <https://lioninteractive.com>
 * @license  https://opensource.org/licenses/MIT MIT License
 */

namespace Roar\Meta\Fields;
use Roar\Meta\MetaField as MetaField;

/**
 * Extends the base MetaField class to add functionality specific to the 'code'
 * field type
 */
class CodeField extends MetaField
{
    /**
     * Instantiates a new instance of the field
     * @param  String      $id      The unique ID for this field
     * @param  MetaSection $section The parent section this field belongs to
     * @param  Array       $options An array of field options
     */
    public function __construct($id, &$section, $options = array())
    {
        $this->type = 'code';
        parent::__construct($id, $section, $options);

        // Apply the field-specific options
        $this->options = wp_parse_args($this->options, array(
            'rows' => 5,
            'placeholder' => '',
            'min_length' => null,
            'max_length' => null,
            'pattern' => '',
            'line_wrap' => false
        ));
    }

    /**
     * Validates a potential field value
     * @param  Mixed $val     The value to validate
     * @param  Mixed $old_val The existing field value
     * @return Mixed          The validated value or WP_Error describing the validation
     *                        error that occurred
     */
    public function validate($val, $old_val = null)
    {
        // Required
        if ('' === $val) {
            if ($this->options['required']) {
                return new \WP_Error(
                    'validation_error',
                    'This field is required.',
                    array(
                        'status' => 400
                    )
                );
            } else {
                return $val;
            }
        }

        // Min character length
        if (
            isset($this->options['min_length']) &&
            strlen($val) < $this->options['min_length']
        ) {
            $msg =
                'This field must be at least ' .
                "{$this->options['min_length']} characters.";
            return new \WP_Error('validation_error', $msg, array(
                'status' => 400
            ));
        }

        // Max character length
        if (
            isset($this->options['max_length']) &&
            strlen($val) > $this->options['max_length']
        ) {
            $msg =
                'This field may not be greater than ' .
                "{$this->options['max_length']} characters.";
            return new \WP_Error('validation_error', $msg, array(
                'status' => 400
            ));
        }

        // Matches pattern
        if (
            $this->options['pattern'] &&
            !preg_match('/' . $this->options['pattern'] . '/', $val)
        ) {
            $msg = 'The format of this field is invalid.';
            return new \WP_Error('validation_error', $msg, array(
                'status' => 400
            ));
        }

        return $val;
    }
}

MetaField::register_type('code', __NAMESPACE__ . '\CodeField');
File Content: CodeField.php

File Content: `CodeField.php`
