@abasb75/dicom-parser/Loader.js

a javascript powerfull dicom parser

var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, generator) {
    function adopt(value) { return value instanceof P ? value : new P(function (resolve) { resolve(value); }); }
    return new (P || (P = Promise))(function (resolve, reject) {
        function fulfilled(value) { try { step(generator.next(value)); } catch (e) { reject(e); } }
        function rejected(value) { try { step(generator["throw"](value)); } catch (e) { reject(e); } }
        function step(result) { result.done ? resolve(result.value) : adopt(result.value).then(fulfilled, rejected); }
        step((generator = generator.apply(thisArg, _arguments || [])).next());
    });
};
var __generator = (this && this.__generator) || function (thisArg, body) {
    var _ = { label: 0, sent: function() { if (t[0] & 1) throw t[1]; return t[1]; }, trys: [], ops: [] }, f, y, t, g = Object.create((typeof Iterator === "function" ? Iterator : Object).prototype);
    return g.next = verb(0), g["throw"] = verb(1), g["return"] = verb(2), typeof Symbol === "function" && (g[Symbol.iterator] = function() { return this; }), g;
    function verb(n) { return function (v) { return step([n, v]); }; }
    function step(op) {
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            if (f = 1, y && (t = op[0] & 2 ? y["return"] : op[0] ? y["throw"] || ((t = y["return"]) && t.call(y), 0) : y.next) && !(t = t.call(y, op[1])).done) return t;
            if (y = 0, t) op = [op[0] & 2, t.value];
            switch (op[0]) {
                case 0: case 1: t = op; break;
                case 4: _.label++; return { value: op[1], done: false };
                case 5: _.label++; y = op[1]; op = [0]; continue;
                case 7: op = _.ops.pop(); _.trys.pop(); continue;
                default:
                    if (!(t = _.trys, t = t.length > 0 && t[t.length - 1]) && (op[0] === 6 || op[0] === 2)) { _ = 0; continue; }
                    if (op[0] === 3 && (!t || (op[1] > t[0] && op[1] < t[3]))) { _.label = op[1]; break; }
                    if (op[0] === 6 && _.label < t[1]) { _.label = t[1]; t = op; break; }
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        if (op[0] & 5) throw op[1]; return { value: op[0] ? op[1] : void 0, done: true };
    }
};
var Loader = /** @class */ (function () {
    function Loader(dicomSrc) {
        Object.defineProperty(this, "dicomSrc", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        Object.defineProperty(this, "xhr", {
            enumerable: true,
            configurable: true,
            writable: true,
            value: void 0
        });
        this.dicomSrc = dicomSrc;
        this.xhr = new XMLHttpRequest();
    }
    Object.defineProperty(Loader.prototype, "load", {
        enumerable: false,
        configurable: true,
        writable: true,
        value: function (dicomSrc) {
            return __awaiter(this, void 0, void 0, function () {
                var dicom_1;
                var _this = this;
                return __generator(this, function (_a) {
                    if (typeof dicomSrc === "string") {
                        dicom_1 = dicomSrc || this.dicomSrc;
                        if (!dicom_1)
                            return [2 /*return*/];
                        return [2 /*return*/, new Promise(function (resolve, reject) {
                                _this.xhr.onload = function () {
                                    resolve(_this.xhr.response);
                                };
                                _this.xhr.onerror = function () {
                                    reject(_this.xhr);
                                };
                                _this.xhr.responseType = 'arraybuffer';
                                _this.xhr.open('GET', dicom_1, true);
                                _this.xhr.send();
                            })];
                    }
                    else if (dicomSrc instanceof File) {
                        return [2 /*return*/, new Promise(function (resolve, reject) {
                                dicomSrc.arrayBuffer().then(function (arrayBuffer) {
                                    resolve(arrayBuffer);
                                }).catch(function (reason) { return reject(reason); });
                            })];
                    }
                    return [2 /*return*/, new Promise(function (resolve, reject) {
                            if (false)
                                resolve(new ArrayBuffer(1));
                            reject("dicom source is not valid");
                        })];
                });
            });
        }
    });
    Object.defineProperty(Loader.prototype, "cancel", {
        enumerable: false,
        configurable: true,
        writable: true,
        value: function () {
            this.xhr.abort();
        }
    });
    return Loader;
}());
export default Loader;