File Type/Enum/MimeTypeEnumType.php

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<?php

namespace WPGraphQL\Type\Enum;

use WPGraphQL\Type\WPEnumType;

/**
 * Class MimeTypeEnumType
 *
 * This defines an EnumType with allowed mime types that are registered to WordPress.
 *
 * @package WPGraphQL\Type\Enum
 * @since   0.0.5
 */
class MimeTypeEnumType extends WPEnumType {

    /**
     * This holds the enum values array
     *
     * @var array $values
     */
    private static $values;

    /**
     * MimeTypeEnumType constructor.
     *
     * @since 0.0.5
     */
    public function __construct() {

        $config = [
            'name'        => 'MimeType',
            'description' => __( 'The MimeType of the object', 'wp-graphql' ),
            'values'      => self::values(),
        ];

        parent::__construct( $config );
    }

    /**
     * values
     * Returns the values to be used in the Enum
     *
     * @return array|null
     */
    private static function values() {

        if ( null === self::$values ) {

            /**
             * Establish a default MimeType value to ensure we don't
             * return null values
             *
             * @since 0.0.5
             */
            self::$values = [
                'IMAGE_JPEG' => [
                    'value' => 'image/jpeg',
                ],
            ];

            $allowed_mime_types = get_allowed_mime_types();

            if ( ! empty( $allowed_mime_types ) ) {
                self::$values = [];
                foreach ( $allowed_mime_types as $mime_type ) {

                    $formatted_mime_type = strtoupper( preg_replace( '/[^A-Za-z0-9]/i', '_', $mime_type ) );

                    self::$values[ $formatted_mime_type ] = [
                        'value' => $mime_type,
                    ];
                }
            }
        }

        return self::$values;

    }

}

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