/*---------------------------------------------------------------------------------------------
 *  Copyright (c) Red Hat, Inc. All rights reserved.
 *  Licensed under the MIT License. See License.txt in the project root for license information.
 *--------------------------------------------------------------------------------------------*/
import { SingleYAMLDocument } from '../parser/yamlParser07';
import { JSONDocument } from '../parser/jsonDocument';
/**
 * Retrieve schema if declared by `$schema`.
 * Public for testing purpose, not part of the API.
 * @param doc
 */
export function getDollarSchema(doc) {
    if ((doc instanceof SingleYAMLDocument || doc instanceof JSONDocument) && doc.root?.type === 'object') {
        let dollarSchema = undefined;
        for (const property of doc.root.properties) {
            if (property.keyNode?.value === '$schema' && typeof property.valueNode?.value === 'string') {
                dollarSchema = property.valueNode?.value;
                break;
            }
        }
        if (typeof dollarSchema === 'string') {
            return dollarSchema;
        }
        if (dollarSchema) {
            console.log('The $schema attribute is not a string, and will be ignored');
        }
    }
    return undefined;
}
//# sourceMappingURL=dollarUtils.js.map