@babylonjs/loaders/glTF/glTFValidation.js

For usage documentation please visit https://doc.babylonjs.com/features/featuresDeepDive/importers/loadingFileTypes/.

import { Tools } from "@babylonjs/core/Misc/tools.js";
function ValidateAsync(data, rootUrl, fileName, getExternalResource) {
    const options = {
        externalResourceFunction: getExternalResource,
    };
    if (fileName) {
        options.uri = rootUrl === "file:" ? fileName : rootUrl + fileName;
    }
    return ArrayBuffer.isView(data) ? GLTFValidator.validateBytes(data, options) : GLTFValidator.validateString(data, options);
}
/**
 * The worker function that gets converted to a blob url to pass into a worker.
 */
function WorkerFunc() {
    const pendingExternalResources = [];
    onmessage = (message) => {
        const data = message.data;
        switch (data.id) {
            case "init": {
                importScripts(data.url);
                break;
            }
            case "validate": {
                ValidateAsync(data.data, data.rootUrl, data.fileName, (uri) => new Promise((resolve, reject) => {
                    const index = pendingExternalResources.length;
                    pendingExternalResources.push({ resolve, reject });
                    postMessage({ id: "getExternalResource", index: index, uri: uri });
                })).then((value) => {
                    postMessage({ id: "validate.resolve", value: value });
                }, (reason) => {
                    postMessage({ id: "validate.reject", reason: reason });
                });
                break;
            }
            case "getExternalResource.resolve": {
                pendingExternalResources[data.index].resolve(data.value);
                break;
            }
            case "getExternalResource.reject": {
                pendingExternalResources[data.index].reject(data.reason);
                break;
            }
        }
    };
}
/**
 * glTF validation
 */
export class GLTFValidation {
    /**
     * Validate a glTF asset using the glTF-Validator.
     * @param data The JSON of a glTF or the array buffer of a binary glTF
     * @param rootUrl The root url for the glTF
     * @param fileName The file name for the glTF
     * @param getExternalResource The callback to get external resources for the glTF validator
     * @returns A promise that resolves with the glTF validation results once complete
     */
    static ValidateAsync(data, rootUrl, fileName, getExternalResource) {
        if (typeof Worker === "function") {
            return new Promise((resolve, reject) => {
                const workerContent = `${ValidateAsync}(${WorkerFunc})()`;
                const workerBlobUrl = URL.createObjectURL(new Blob([workerContent], { type: "application/javascript" }));
                const worker = new Worker(workerBlobUrl);
                const onError = (error) => {
                    worker.removeEventListener("error", onError);
                    worker.removeEventListener("message", onMessage);
                    // eslint-disable-next-line @typescript-eslint/prefer-promise-reject-errors
                    reject(error);
                };
                const onMessage = (message) => {
                    const data = message.data;
                    switch (data.id) {
                        case "getExternalResource": {
                            getExternalResource(data.uri).then((value) => {
                                worker.postMessage({ id: "getExternalResource.resolve", index: data.index, value: value }, [value.buffer]);
                            }, (reason) => {
                                worker.postMessage({ id: "getExternalResource.reject", index: data.index, reason: reason });
                            });
                            break;
                        }
                        case "validate.resolve": {
                            worker.removeEventListener("error", onError);
                            worker.removeEventListener("message", onMessage);
                            resolve(data.value);
                            worker.terminate();
                            break;
                        }
                        case "validate.reject": {
                            worker.removeEventListener("error", onError);
                            worker.removeEventListener("message", onMessage);
                            // eslint-disable-next-line @typescript-eslint/prefer-promise-reject-errors
                            reject(data.reason);
                            worker.terminate();
                        }
                    }
                };
                worker.addEventListener("error", onError);
                worker.addEventListener("message", onMessage);
                worker.postMessage({ id: "init", url: Tools.GetBabylonScriptURL(this.Configuration.url) });
                if (ArrayBuffer.isView(data)) {
                    // Slice the data to avoid copying the whole array buffer.
                    const slicedData = data.slice();
                    worker.postMessage({ id: "validate", data: slicedData, rootUrl: rootUrl, fileName: fileName }, [slicedData.buffer]);
                }
                else {
                    worker.postMessage({ id: "validate", data: data, rootUrl: rootUrl, fileName: fileName });
                }
            });
        }
        else {
            if (!this._LoadScriptPromise) {
                this._LoadScriptPromise = Tools.LoadBabylonScriptAsync(this.Configuration.url);
            }
            return this._LoadScriptPromise.then(() => {
                return ValidateAsync(data, rootUrl, fileName, getExternalResource);
            });
        }
    }
}
/**
 * The configuration. Defaults to `{ url: "https://cdn.babylonjs.com/gltf_validator.js" }`.
 */
GLTFValidation.Configuration = {
    url: `${Tools._DefaultCdnUrl}/gltf_validator.js`,
};
//# sourceMappingURL=glTFValidation.js.map