import removeExtensionsRequired from './removeExtensionsRequired.js'
import defined from '../../Core/defined.js'

    /**
     * Removes an extension from gltf.extensionsUsed and gltf.extensionsRequired if it is present.
     *
     * @param {Object} gltf A javascript object containing a glTF asset.
     * @param {String} extension The extension to remove.
     *
     * @private
     */
    function removeExtensionsUsed(gltf, extension) {
        var extensionsUsed = gltf.extensionsUsed;
        if (defined(extensionsUsed)) {
            var index = extensionsUsed.indexOf(extension);
            if (index >= 0) {
                extensionsUsed.splice(index, 1);
            }
            removeExtensionsRequired(gltf, extension);
            if (extensionsUsed.length === 0) {
                delete gltf.extensionsUsed;
            }
        }
    }

    export default removeExtensionsUsed;