Urađena test aplikacija. Povezan front i back.

10 files changed, 918 insertions, 0 deletions

diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/AjaxObservable.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/AjaxObservable.ts
new file mode 100644
index 00000000..d1f3f918
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/AjaxObservable.ts
@@ -0,0 +1,550 @@
+import { root } from '../../util/root';
+import { Observable } from '../../Observable';
+import { Subscriber } from '../../Subscriber';
+import { TeardownLogic } from '../../types';
+import { map } from '../../operators/map';
+
+export interface AjaxRequest {
+  url?: string;
+  body?: any;
+  user?: string;
+  async?: boolean;
+  method?: string;
+  headers?: Object;
+  timeout?: number;
+  password?: string;
+  hasContent?: boolean;
+  crossDomain?: boolean;
+  withCredentials?: boolean;
+  createXHR?: () => XMLHttpRequest;
+  progressSubscriber?: Subscriber<any>;
+  responseType?: string;
+}
+
+function getCORSRequest(): XMLHttpRequest {
+  if (root.XMLHttpRequest) {
+    return new root.XMLHttpRequest();
+  } else if (!!root.XDomainRequest) {
+    return new root.XDomainRequest();
+  } else {
+    throw new Error('CORS is not supported by your browser');
+  }
+}
+
+function getXMLHttpRequest(): XMLHttpRequest {
+  if (root.XMLHttpRequest) {
+    return new root.XMLHttpRequest();
+  } else {
+    let progId: string;
+    try {
+      const progIds = ['Msxml2.XMLHTTP', 'Microsoft.XMLHTTP', 'Msxml2.XMLHTTP.4.0'];
+      for (let i = 0; i < 3; i++) {
+        try {
+          progId = progIds[i];
+          if (new root.ActiveXObject(progId)) {
+            break;
+          }
+        } catch (e) {
+          //suppress exceptions
+        }
+      }
+      return new root.ActiveXObject(progId);
+    } catch (e) {
+      throw new Error('XMLHttpRequest is not supported by your browser');
+    }
+  }
+}
+
+export interface AjaxCreationMethod {
+  (urlOrRequest: string | AjaxRequest): Observable<AjaxResponse>;
+  get(url: string, headers?: Object): Observable<AjaxResponse>;
+  post(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
+  put(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
+  patch(url: string, body?: any, headers?: Object): Observable<AjaxResponse>;
+  delete(url: string, headers?: Object): Observable<AjaxResponse>;
+  getJSON<T>(url: string, headers?: Object): Observable<T>;
+}
+
+export function ajaxGet(url: string, headers: Object = null) {
+  return new AjaxObservable<AjaxResponse>({ method: 'GET', url, headers });
+}
+
+export function ajaxPost(url: string, body?: any, headers?: Object): Observable<AjaxResponse> {
+  return new AjaxObservable<AjaxResponse>({ method: 'POST', url, body, headers });
+}
+
+export function ajaxDelete(url: string, headers?: Object): Observable<AjaxResponse> {
+  return new AjaxObservable<AjaxResponse>({ method: 'DELETE', url, headers });
+}
+
+export function ajaxPut(url: string, body?: any, headers?: Object): Observable<AjaxResponse> {
+  return new AjaxObservable<AjaxResponse>({ method: 'PUT', url, body, headers });
+}
+
+export function ajaxPatch(url: string, body?: any, headers?: Object): Observable<AjaxResponse> {
+  return new AjaxObservable<AjaxResponse>({ method: 'PATCH', url, body, headers });
+}
+
+const mapResponse = map((x: AjaxResponse, index: number) => x.response);
+
+export function ajaxGetJSON<T>(url: string, headers?: Object): Observable<T> {
+  return mapResponse(
+    new AjaxObservable<AjaxResponse>({
+      method: 'GET',
+      url,
+      responseType: 'json',
+      headers
+    })
+  );
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @extends {Ignored}
+ * @hide true
+ */
+export class AjaxObservable<T> extends Observable<T> {
+  /**
+   * Creates an observable for an Ajax request with either a request object with
+   * url, headers, etc or a string for a URL.
+   *
+   * ## Example
+   * ```ts
+   * import { ajax } from 'rxjs/ajax';
+ *
+   * const source1 = ajax('/products');
+   * const source2 = ajax({ url: 'products', method: 'GET' });
+   * ```
+   *
+   * @param {string|Object} request Can be one of the following:
+   *   A string of the URL to make the Ajax call.
+   *   An object with the following properties
+   *   - url: URL of the request
+   *   - body: The body of the request
+   *   - method: Method of the request, such as GET, POST, PUT, PATCH, DELETE
+   *   - async: Whether the request is async
+   *   - headers: Optional headers
+   *   - crossDomain: true if a cross domain request, else false
+   *   - createXHR: a function to override if you need to use an alternate
+   *   XMLHttpRequest implementation.
+   *   - resultSelector: a function to use to alter the output value type of
+   *   the Observable. Gets {@link AjaxResponse} as an argument.
+   * @return {Observable} An observable sequence containing the XMLHttpRequest.
+   * @static true
+   * @name ajax
+   * @owner Observable
+   * @nocollapse
+  */
+  static create: AjaxCreationMethod = (() => {
+    const create: any = (urlOrRequest: string | AjaxRequest) => {
+      return new AjaxObservable(urlOrRequest);
+    };
+
+    create.get = ajaxGet;
+    create.post = ajaxPost;
+    create.delete = ajaxDelete;
+    create.put = ajaxPut;
+    create.patch = ajaxPatch;
+    create.getJSON = ajaxGetJSON;
+
+    return <AjaxCreationMethod>create;
+  })();
+
+  private request: AjaxRequest;
+
+  constructor(urlOrRequest: string | AjaxRequest) {
+    super();
+
+    const request: AjaxRequest = {
+      async: true,
+      createXHR: function(this: AjaxRequest) {
+        return this.crossDomain ? getCORSRequest() : getXMLHttpRequest();
+      },
+      crossDomain: true,
+      withCredentials: false,
+      headers: {},
+      method: 'GET',
+      responseType: 'json',
+      timeout: 0
+    };
+
+    if (typeof urlOrRequest === 'string') {
+      request.url = urlOrRequest;
+    } else {
+      for (const prop in urlOrRequest) {
+        if (urlOrRequest.hasOwnProperty(prop)) {
+          request[prop] = urlOrRequest[prop];
+        }
+      }
+    }
+
+    this.request = request;
+  }
+
+  /** @deprecated This is an internal implementation detail, do not use. */
+  _subscribe(subscriber: Subscriber<T>): TeardownLogic {
+    return new AjaxSubscriber(subscriber, this.request);
+  }
+}
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class AjaxSubscriber<T> extends Subscriber<Event> {
+  private xhr: XMLHttpRequest;
+  private done: boolean = false;
+
+  constructor(destination: Subscriber<T>, public request: AjaxRequest) {
+    super(destination);
+
+    const headers = request.headers = request.headers || {};
+
+    // force CORS if requested
+    if (!request.crossDomain && !this.getHeader(headers, 'X-Requested-With')) {
+      headers['X-Requested-With'] = 'XMLHttpRequest';
+    }
+
+    // ensure content type is set
+    let contentTypeHeader = this.getHeader(headers, 'Content-Type');
+    if (!contentTypeHeader && !(root.FormData && request.body instanceof root.FormData) && typeof request.body !== 'undefined') {
+      headers['Content-Type'] = 'application/x-www-form-urlencoded; charset=UTF-8';
+    }
+
+    // properly serialize body
+    request.body = this.serializeBody(request.body, this.getHeader(request.headers, 'Content-Type'));
+
+    this.send();
+  }
+
+  next(e: Event): void {
+    this.done = true;
+    const { xhr, request, destination } = this;
+    let result;
+    try {
+      result = new AjaxResponse(e, xhr, request);
+    } catch (err) {
+      return destination.error(err);
+    }
+    destination.next(result);
+  }
+
+  private send(): void {
+    const {
+      request,
+      request: { user, method, url, async, password, headers, body }
+    } = this;
+    try {
+      const xhr = this.xhr = request.createXHR();
+
+      // set up the events before open XHR
+      // https://developer.mozilla.org/en/docs/Web/API/XMLHttpRequest/Using_XMLHttpRequest
+      // You need to add the event listeners before calling open() on the request.
+      // Otherwise the progress events will not fire.
+      this.setupEvents(xhr, request);
+      // open XHR
+      if (user) {
+        xhr.open(method, url, async, user, password);
+      } else {
+        xhr.open(method, url, async);
+      }
+
+      // timeout, responseType and withCredentials can be set once the XHR is open
+      if (async) {
+        xhr.timeout = request.timeout;
+        xhr.responseType = request.responseType as any;
+      }
+
+      if ('withCredentials' in xhr) {
+        xhr.withCredentials = !!request.withCredentials;
+      }
+
+      // set headers
+      this.setHeaders(xhr, headers);
+
+      // finally send the request
+      if (body) {
+        xhr.send(body);
+      } else {
+        xhr.send();
+      }
+    } catch (err) {
+      this.error(err);
+    }
+  }
+
+  private serializeBody(body: any, contentType?: string) {
+    if (!body || typeof body === 'string') {
+      return body;
+    } else if (root.FormData && body instanceof root.FormData) {
+      return body;
+    }
+
+    if (contentType) {
+      const splitIndex = contentType.indexOf(';');
+      if (splitIndex !== -1) {
+        contentType = contentType.substring(0, splitIndex);
+      }
+    }
+
+    switch (contentType) {
+      case 'application/x-www-form-urlencoded':
+        return Object.keys(body).map(key => `${encodeURIComponent(key)}=${encodeURIComponent(body[key])}`).join('&');
+      case 'application/json':
+        return JSON.stringify(body);
+      default:
+        return body;
+    }
+  }
+
+  private setHeaders(xhr: XMLHttpRequest, headers: Object) {
+    for (let key in headers) {
+      if (headers.hasOwnProperty(key)) {
+        xhr.setRequestHeader(key, headers[key]);
+      }
+    }
+  }
+
+  private getHeader(headers: {}, headerName: string): any {
+    for (let key in headers) {
+      if (key.toLowerCase() === headerName.toLowerCase()) {
+        return headers[key];
+      }
+    }
+
+    return undefined;
+  }
+
+  private setupEvents(xhr: XMLHttpRequest, request: AjaxRequest) {
+    const progressSubscriber = request.progressSubscriber;
+
+    function xhrTimeout(this: XMLHttpRequest, e: ProgressEvent): void {
+      const {subscriber, progressSubscriber, request } = (<any>xhrTimeout);
+      if (progressSubscriber) {
+        progressSubscriber.error(e);
+      }
+      let error;
+      try {
+        error = new AjaxTimeoutError(this, request); // TODO: Make betterer.
+      } catch (err) {
+        error = err;
+      }
+      subscriber.error(error);
+    }
+    xhr.ontimeout = xhrTimeout;
+    (<any>xhrTimeout).request = request;
+    (<any>xhrTimeout).subscriber = this;
+    (<any>xhrTimeout).progressSubscriber = progressSubscriber;
+    if (xhr.upload && 'withCredentials' in xhr) {
+      if (progressSubscriber) {
+        let xhrProgress: (e: ProgressEvent) => void;
+        xhrProgress = function(e: ProgressEvent) {
+          const { progressSubscriber } = (<any>xhrProgress);
+          progressSubscriber.next(e);
+        };
+        if (root.XDomainRequest) {
+          xhr.onprogress = xhrProgress;
+        } else {
+          xhr.upload.onprogress = xhrProgress;
+        }
+        (<any>xhrProgress).progressSubscriber = progressSubscriber;
+      }
+      let xhrError: (e: any) => void;
+      xhrError = function(this: XMLHttpRequest, e: ErrorEvent) {
+        const { progressSubscriber, subscriber, request } = (<any>xhrError);
+        if (progressSubscriber) {
+          progressSubscriber.error(e);
+        }
+        let error;
+        try {
+          error = new AjaxError('ajax error', this, request);
+        } catch (err) {
+          error = err;
+        }
+        subscriber.error(error);
+      };
+      xhr.onerror = xhrError;
+      (<any>xhrError).request = request;
+      (<any>xhrError).subscriber = this;
+      (<any>xhrError).progressSubscriber = progressSubscriber;
+    }
+
+    function xhrReadyStateChange(this: XMLHttpRequest, e: Event) {
+      return;
+    }
+    xhr.onreadystatechange = xhrReadyStateChange;
+    (<any>xhrReadyStateChange).subscriber = this;
+    (<any>xhrReadyStateChange).progressSubscriber = progressSubscriber;
+    (<any>xhrReadyStateChange).request = request;
+
+    function xhrLoad(this: XMLHttpRequest, e: Event) {
+      const { subscriber, progressSubscriber, request } = (<any>xhrLoad);
+      if (this.readyState === 4) {
+        // normalize IE9 bug (http://bugs.jquery.com/ticket/1450)
+        let status: number = this.status === 1223 ? 204 : this.status;
+        let response: any = (this.responseType === 'text' ?  (
+          this.response || this.responseText) : this.response);
+
+        // fix status code when it is 0 (0 status is undocumented).
+        // Occurs when accessing file resources or on Android 4.1 stock browser
+        // while retrieving files from application cache.
+        if (status === 0) {
+          status = response ? 200 : 0;
+        }
+
+        // 4xx and 5xx should error (https://www.w3.org/Protocols/rfc2616/rfc2616-sec10.html)
+        if (status < 400) {
+          if (progressSubscriber) {
+            progressSubscriber.complete();
+          }
+          subscriber.next(e);
+          subscriber.complete();
+        } else {
+          if (progressSubscriber) {
+            progressSubscriber.error(e);
+          }
+          let error;
+          try {
+            error = new AjaxError('ajax error ' + status, this, request);
+          } catch (err) {
+            error = err;
+          }
+          subscriber.error(error);
+        }
+      }
+    }
+    xhr.onload = xhrLoad;
+    (<any>xhrLoad).subscriber = this;
+    (<any>xhrLoad).progressSubscriber = progressSubscriber;
+    (<any>xhrLoad).request = request;
+  }
+
+  unsubscribe() {
+    const { done, xhr } = this;
+    if (!done && xhr && xhr.readyState !== 4 && typeof xhr.abort === 'function') {
+      xhr.abort();
+    }
+    super.unsubscribe();
+  }
+}
+
+/**
+ * A normalized AJAX response.
+ *
+ * @see {@link ajax}
+ *
+ * @class AjaxResponse
+ */
+export class AjaxResponse {
+  /** @type {number} The HTTP status code */
+  status: number;
+
+  /** @type {string|ArrayBuffer|Document|object|any} The response data */
+  response: any;
+
+  /** @type {string} The raw responseText */
+  responseText: string;
+
+  /** @type {string} The responseType (e.g. 'json', 'arraybuffer', or 'xml') */
+  responseType: string;
+
+  constructor(public originalEvent: Event, public xhr: XMLHttpRequest, public request: AjaxRequest) {
+    this.status = xhr.status;
+    this.responseType = xhr.responseType || request.responseType;
+    this.response = parseXhrResponse(this.responseType, xhr);
+  }
+}
+
+export type AjaxErrorNames = 'AjaxError' | 'AjaxTimeoutError';
+
+/**
+ * A normalized AJAX error.
+ *
+ * @see {@link ajax}
+ *
+ * @class AjaxError
+ */
+export interface AjaxError extends Error {
+  /** @type {XMLHttpRequest} The XHR instance associated with the error */
+  xhr: XMLHttpRequest;
+
+  /** @type {AjaxRequest} The AjaxRequest associated with the error */
+  request: AjaxRequest;
+
+  /** @type {number} The HTTP status code */
+  status: number;
+
+  /** @type {string} The responseType (e.g. 'json', 'arraybuffer', or 'xml') */
+  responseType: string;
+
+  /** @type {string|ArrayBuffer|Document|object|any} The response data */
+  response: any;
+}
+
+export interface AjaxErrorCtor {
+  new(message: string, xhr: XMLHttpRequest, request: AjaxRequest): AjaxError;
+}
+
+const AjaxErrorImpl = (() => {
+  function AjaxErrorImpl(this: any, message: string, xhr: XMLHttpRequest, request: AjaxRequest): AjaxError {
+    Error.call(this);
+    this.message = message;
+    this.name = 'AjaxError';
+    this.xhr = xhr;
+    this.request = request;
+    this.status = xhr.status;
+    this.responseType = xhr.responseType || request.responseType;
+    this.response = parseXhrResponse(this.responseType, xhr);
+    return this;
+  }
+  AjaxErrorImpl.prototype = Object.create(Error.prototype);
+  return AjaxErrorImpl;
+})();
+
+export const AjaxError: AjaxErrorCtor = AjaxErrorImpl as any;
+
+function parseJson(xhr: XMLHttpRequest) {
+  // HACK(benlesh): TypeScript shennanigans
+  // tslint:disable-next-line:no-any XMLHttpRequest is defined to always have 'response' inferring xhr as never for the else clause.
+  if ('response' in (xhr as any)) {
+    //IE does not support json as responseType, parse it internally
+    return xhr.responseType ? xhr.response : JSON.parse(xhr.response || xhr.responseText || 'null');
+  } else {
+    return JSON.parse((xhr as any).responseText || 'null');
+  }
+}
+
+function parseXhrResponse(responseType: string, xhr: XMLHttpRequest) {
+  switch (responseType) {
+    case 'json':
+        return parseJson(xhr);
+      case 'xml':
+        return xhr.responseXML;
+      case 'text':
+      default:
+          // HACK(benlesh): TypeScript shennanigans
+          // tslint:disable-next-line:no-any XMLHttpRequest is defined to always have 'response' inferring xhr as never for the else sub-expression.
+          return  ('response' in (xhr as any)) ? xhr.response : xhr.responseText;
+  }
+}
+
+export interface AjaxTimeoutError extends AjaxError {
+}
+
+export interface AjaxTimeoutErrorCtor {
+  new(xhr: XMLHttpRequest, request: AjaxRequest): AjaxTimeoutError;
+}
+
+function AjaxTimeoutErrorImpl(this: any, xhr: XMLHttpRequest, request: AjaxRequest) {
+  AjaxError.call(this, 'ajax timeout', xhr, request);
+  this.name = 'AjaxTimeoutError';
+  return this;
+}
+
+/**
+ * @see {@link ajax}
+ *
+ * @class AjaxTimeoutError
+ */
+export const AjaxTimeoutError: AjaxTimeoutErrorCtor = AjaxTimeoutErrorImpl as any;
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/ajax.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/ajax.ts
new file mode 100644
index 00000000..d0885c1d
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/observable/dom/ajax.ts
@@ -0,0 +1,82 @@
+import {  AjaxObservable, AjaxCreationMethod  } from './AjaxObservable';
+/**
+ * There is an ajax operator on the Rx object.
+ *
+ * It creates an observable for an Ajax request with either a request object with
+ * url, headers, etc or a string for a URL.
+ *
+ *
+ * ## Using ajax() to fetch the response object that is being returned from API.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax(`https://api.github.com/users?per_page=5`).pipe(
+ *   map(userResponse => console.log('users: ', userResponse)),
+ *   catchError(error => {
+ *     console.log('error: ', error);
+ *     return of(error);
+ *   })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax.getJSON() to fetch data from API.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax.getJSON(`https://api.github.com/users?per_page=5`).pipe(
+ *   map(userResponse => console.log('users: ', userResponse)),
+ *   catchError(error => {
+ *     console.log('error: ', error);
+ *     return of(error);
+ *   })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax() with object as argument and method POST with a two seconds delay.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { of } from 'rxjs';
+ *
+ * const users = ajax({
+ *   url: 'https://httpbin.org/delay/2',
+ *   method: 'POST',
+ *   headers: {
+ *     'Content-Type': 'application/json',
+ *     'rxjs-custom-header': 'Rxjs'
+ *   },
+ *   body: {
+ *     rxjs: 'Hello World!'
+ *   }
+ * }).pipe(
+ *   map(response => console.log('response: ', response)),
+ *   catchError(error => {
+ *     console.log('error: ', error);
+ *     return of(error);
+ *   })
+ * );
+ *
+ * ```
+ *
+ * ## Using ajax() to fetch. An error object that is being returned from the request.
+ * ```ts
+ * import { ajax } from 'rxjs/ajax';
+ * import { map, catchError } from 'rxjs/operators';
+ * import { of } from 'rxjs';
+ *
+ * const obs$ = ajax(`https://api.github.com/404`).pipe(
+ *   map(userResponse => console.log('users: ', userResponse)),
+ *   catchError(error => {
+ *     console.log('error: ', error);
+ *     return of(error);
+ *   })
+ * );
+ *
+ * ```
+ */
+export const ajax: AjaxCreationMethod = (() => AjaxObservable.create)();
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/Action.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/Action.ts
new file mode 100644
index 00000000..6cf91bcb
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/Action.ts
@@ -0,0 +1,36 @@
+import { Scheduler } from '../Scheduler';
+import { Subscription } from '../Subscription';
+import { SchedulerAction } from '../types';
+
+/**
+ * A unit of work to be executed in a `scheduler`. An action is typically
+ * created from within a {@link SchedulerLike} and an RxJS user does not need to concern
+ * themselves about creating and manipulating an Action.
+ *
+ * ```ts
+ * class Action<T> extends Subscription {
+ *   new (scheduler: Scheduler, work: (state?: T) => void);
+ *   schedule(state?: T, delay: number = 0): Subscription;
+ * }
+ * ```
+ *
+ * @class Action<T>
+ */
+export class Action<T> extends Subscription {
+  constructor(scheduler: Scheduler, work: (this: SchedulerAction<T>, state?: T) => void) {
+    super();
+  }
+  /**
+   * Schedules this action on its parent {@link SchedulerLike} for execution. May be passed
+   * some context object, `state`. May happen at some point in the future,
+   * according to the `delay` parameter, if specified.
+   * @param {T} [state] Some contextual data that the `work` function uses when
+   * called by the Scheduler.
+   * @param {number} [delay] Time to wait before executing the work, where the
+   * time unit is implicit and defined by the Scheduler.
+   * @return {void}
+   */
+  public schedule(state?: T, delay: number = 0): Subscription {
+    return this;
+  }
+}
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameAction.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameAction.ts
new file mode 100644
index 00000000..e9ea64fa
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameAction.ts
@@ -0,0 +1,47 @@
+import { AsyncAction } from './AsyncAction';
+import { AnimationFrameScheduler } from './AnimationFrameScheduler';
+import { SchedulerAction } from '../types';
+
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class AnimationFrameAction<T> extends AsyncAction<T> {
+
+  constructor(protected scheduler: AnimationFrameScheduler,
+              protected work: (this: SchedulerAction<T>, state?: T) => void) {
+    super(scheduler, work);
+  }
+
+  protected requestAsyncId(scheduler: AnimationFrameScheduler, id?: any, delay: number = 0): any {
+    // If delay is greater than 0, request as an async action.
+    if (delay !== null && delay > 0) {
+      return super.requestAsyncId(scheduler, id, delay);
+    }
+    // Push the action to the end of the scheduler queue.
+    scheduler.actions.push(this);
+    // If an animation frame has already been requested, don't request another
+    // one. If an animation frame hasn't been requested yet, request one. Return
+    // the current animation frame request id.
+    return scheduler.scheduled || (scheduler.scheduled = requestAnimationFrame(
+      () => scheduler.flush(null)));
+  }
+  protected recycleAsyncId(scheduler: AnimationFrameScheduler, id?: any, delay: number = 0): any {
+    // If delay exists and is greater than 0, or if the delay is null (the
+    // action wasn't rescheduled) but was originally scheduled as an async
+    // action, then recycle as an async action.
+    if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
+      return super.recycleAsyncId(scheduler, id, delay);
+    }
+    // If the scheduler queue is empty, cancel the requested animation frame and
+    // set the scheduled flag to undefined so the next AnimationFrameAction will
+    // request its own.
+    if (scheduler.actions.length === 0) {
+      cancelAnimationFrame(id);
+      scheduler.scheduled = undefined;
+    }
+    // Return undefined so the action knows to request a new async id if it's rescheduled.
+    return undefined;
+  }
+}
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameScheduler.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameScheduler.ts
new file mode 100644
index 00000000..c550429f
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AnimationFrameScheduler.ts
@@ -0,0 +1,31 @@
+import { AsyncAction } from './AsyncAction';
+import { AsyncScheduler } from './AsyncScheduler';
+
+export class AnimationFrameScheduler extends AsyncScheduler {
+  public flush(action?: AsyncAction<any>): void {
+
+    this.active = true;
+    this.scheduled = undefined;
+
+    const {actions} = this;
+    let error: any;
+    let index: number = -1;
+    let count: number = actions.length;
+    action = action || actions.shift();
+
+    do {
+      if (error = action.execute(action.state, action.delay)) {
+        break;
+      }
+    } while (++index < count && (action = actions.shift()));
+
+    this.active = false;
+
+    if (error) {
+      while (++index < count && (action = actions.shift())) {
+        action.unsubscribe();
+      }
+      throw error;
+    }
+  }
+}
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AsapAction.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AsapAction.ts
new file mode 100644
index 00000000..1fe1622d
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/AsapAction.ts
@@ -0,0 +1,48 @@
+import { Immediate } from '../util/Immediate';
+import { AsyncAction } from './AsyncAction';
+import { AsapScheduler } from './AsapScheduler';
+import { SchedulerAction } from '../types';
+/**
+ * We need this JSDoc comment for affecting ESDoc.
+ * @ignore
+ * @extends {Ignored}
+ */
+export class AsapAction<T> extends AsyncAction<T> {
+
+  constructor(protected scheduler: AsapScheduler,
+              protected work: (this: SchedulerAction<T>, state?: T) => void) {
+    super(scheduler, work);
+  }
+
+  protected requestAsyncId(scheduler: AsapScheduler, id?: any, delay: number = 0): any {
+    // If delay is greater than 0, request as an async action.
+    if (delay !== null && delay > 0) {
+      return super.requestAsyncId(scheduler, id, delay);
+    }
+    // Push the action to the end of the scheduler queue.
+    scheduler.actions.push(this);
+    // If a microtask has already been scheduled, don't schedule another
+    // one. If a microtask hasn't been scheduled yet, schedule one now. Return
+    // the current scheduled microtask id.
+    return scheduler.scheduled || (scheduler.scheduled = Immediate.setImmediate(
+      scheduler.flush.bind(scheduler, null)
+    ));
+  }
+  protected recycleAsyncId(scheduler: AsapScheduler, id?: any, delay: number = 0): any {
+    // If delay exists and is greater than 0, or if the delay is null (the
+    // action wasn't rescheduled) but was originally scheduled as an async
+    // action, then recycle as an async action.
+    if ((delay !== null && delay > 0) || (delay === null && this.delay > 0)) {
+      return super.recycleAsyncId(scheduler, id, delay);
+    }
+    // If the scheduler queue is empty, cancel the requested microtask and
+    // set the scheduled flag to undefined so the next AsapAction will schedule
+    // its own.
+    if (scheduler.actions.length === 0) {
+      Immediate.clearImmediate(id);
+      scheduler.scheduled = undefined;
+    }
+    // Return undefined so the action knows to request a new async id if it's rescheduled.
+    return undefined;
+  }
+}
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/animationFrame.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/animationFrame.ts
new file mode 100644
index 00000000..a3f62050
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/animationFrame.ts
@@ -0,0 +1,40 @@
+import { AnimationFrameAction } from './AnimationFrameAction';
+import { AnimationFrameScheduler } from './AnimationFrameScheduler';
+
+/**
+ *
+ * Animation Frame Scheduler
+ *
+ * <span class="informal">Perform task when `window.requestAnimationFrame` would fire</span>
+ *
+ * When `animationFrame` scheduler is used with delay, it will fall back to {@link asyncScheduler} scheduler
+ * behaviour.
+ *
+ * Without delay, `animationFrame` scheduler can be used to create smooth browser animations.
+ * It makes sure scheduled task will happen just before next browser content repaint,
+ * thus performing animations as efficiently as possible.
+ *
+ * ## Example
+ * Schedule div height animation
+ * ```ts
+ * // html: <div style="background: #0ff;"></div>
+ * import { animationFrameScheduler } from 'rxjs';
+ *
+ * const div = document.querySelector('div');
+ *
+ * animationFrameScheduler.schedule(function(height) {
+ *   div.style.height = height + "px";
+ *
+ *   this.schedule(height + 1);  // `this` references currently executing Action,
+ *                               // which we reschedule with new state
+ * }, 0, 0);
+ *
+ * // You will see a div element growing in height
+ * ```
+ */
+export const animationFrameScheduler = new AnimationFrameScheduler(AnimationFrameAction);
+
+/**
+ * @deprecated renamed. Use {@link animationFrameScheduler}
+ */
+export const animationFrame = animationFrameScheduler;
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/asap.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/asap.ts
new file mode 100644
index 00000000..bbd721d2
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/scheduler/asap.ts
@@ -0,0 +1,43 @@
+import { AsapAction } from './AsapAction';
+import { AsapScheduler } from './AsapScheduler';
+
+/**
+ *
+ * Asap Scheduler
+ *
+ * <span class="informal">Perform task as fast as it can be performed asynchronously</span>
+ *
+ * `asap` scheduler behaves the same as {@link asyncScheduler} scheduler when you use it to delay task
+ * in time. If however you set delay to `0`, `asap` will wait for current synchronously executing
+ * code to end and then it will try to execute given task as fast as possible.
+ *
+ * `asap` scheduler will do its best to minimize time between end of currently executing code
+ * and start of scheduled task. This makes it best candidate for performing so called "deferring".
+ * Traditionally this was achieved by calling `setTimeout(deferredTask, 0)`, but that technique involves
+ * some (although minimal) unwanted delay.
+ *
+ * Note that using `asap` scheduler does not necessarily mean that your task will be first to process
+ * after currently executing code. In particular, if some task was also scheduled with `asap` before,
+ * that task will execute first. That being said, if you need to schedule task asynchronously, but
+ * as soon as possible, `asap` scheduler is your best bet.
+ *
+ * ## Example
+ * Compare async and asap scheduler<
+ * ```ts
+ * import { asapScheduler, asyncScheduler } from 'rxjs';
+ *
+ * asyncScheduler.schedule(() => console.log('async')); // scheduling 'async' first...
+ * asapScheduler.schedule(() => console.log('asap'));
+ *
+ * // Logs:
+ * // "asap"
+ * // "async"
+ * // ... but 'asap' goes first!
+ * ```
+ */
+export const asapScheduler = new AsapScheduler(AsapAction);
+
+/**
+ * @deprecated renamed. Use {@link asapScheduler}
+ */
+export const asap = asapScheduler;
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/ArgumentOutOfRangeError.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/ArgumentOutOfRangeError.ts
new file mode 100644
index 00000000..b9bd72d1
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/ArgumentOutOfRangeError.ts
@@ -0,0 +1,31 @@
+export interface ArgumentOutOfRangeError extends Error {
+}
+
+export interface ArgumentOutOfRangeErrorCtor {
+  new(): ArgumentOutOfRangeError;
+}
+
+const ArgumentOutOfRangeErrorImpl = (() => {
+  function ArgumentOutOfRangeErrorImpl(this: any) {
+    Error.call(this);
+    this.message = 'argument out of range';
+    this.name = 'ArgumentOutOfRangeError';
+    return this;
+  }
+
+  ArgumentOutOfRangeErrorImpl.prototype = Object.create(Error.prototype);
+
+  return ArgumentOutOfRangeErrorImpl;
+})();
+
+/**
+ * An error thrown when an element was queried at a certain index of an
+ * Observable, but no such index or position exists in that sequence.
+ *
+ * @see {@link elementAt}
+ * @see {@link take}
+ * @see {@link takeLast}
+ *
+ * @class ArgumentOutOfRangeError
+ */
+export const ArgumentOutOfRangeError: ArgumentOutOfRangeErrorCtor = ArgumentOutOfRangeErrorImpl as any;
\ No newline at end of file
diff --git a/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/applyMixins.ts b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/applyMixins.ts
new file mode 100644
index 00000000..7c1ed242
--- /dev/null
+++ b/sandbox/testAppNevena/Front/node_modules/rxjs/src/internal/util/applyMixins.ts
@@ -0,0 +1,10 @@
+export function applyMixins(derivedCtor: any, baseCtors: any[]) {
+  for (let i = 0, len = baseCtors.length; i < len; i++) {
+    const baseCtor = baseCtors[i];
+    const propertyKeys = Object.getOwnPropertyNames(baseCtor.prototype);
+    for (let j = 0, len2 = propertyKeys.length; j < len2; j++) {
+      const name = propertyKeys[j];
+      derivedCtor.prototype[name] = baseCtor.prototype[name];
+    }
+  }
+}
\ No newline at end of file