497.ce3b54966dc799303975.js

"use strict";
(self["webpackChunkdemo"] = self["webpackChunkdemo"] || []).push([[497],{

/***/ 8497:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

__webpack_require__.r(__webpack_exports__);
/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "HTTP_INTERCEPTORS": () => (/* binding */ HTTP_INTERCEPTORS),
/* harmony export */   "HttpBackend": () => (/* binding */ HttpBackend),
/* harmony export */   "HttpClient": () => (/* binding */ HttpClient),
/* harmony export */   "HttpClientJsonpModule": () => (/* binding */ HttpClientJsonpModule),
/* harmony export */   "HttpClientModule": () => (/* binding */ HttpClientModule),
/* harmony export */   "HttpClientXsrfModule": () => (/* binding */ HttpClientXsrfModule),
/* harmony export */   "HttpContext": () => (/* binding */ HttpContext),
/* harmony export */   "HttpContextToken": () => (/* binding */ HttpContextToken),
/* harmony export */   "HttpErrorResponse": () => (/* binding */ HttpErrorResponse),
/* harmony export */   "HttpEventType": () => (/* binding */ HttpEventType),
/* harmony export */   "HttpHandler": () => (/* binding */ HttpHandler),
/* harmony export */   "HttpHeaderResponse": () => (/* binding */ HttpHeaderResponse),
/* harmony export */   "HttpHeaders": () => (/* binding */ HttpHeaders),
/* harmony export */   "HttpParams": () => (/* binding */ HttpParams),
/* harmony export */   "HttpRequest": () => (/* binding */ HttpRequest),
/* harmony export */   "HttpResponse": () => (/* binding */ HttpResponse),
/* harmony export */   "HttpResponseBase": () => (/* binding */ HttpResponseBase),
/* harmony export */   "HttpUrlEncodingCodec": () => (/* binding */ HttpUrlEncodingCodec),
/* harmony export */   "HttpXhrBackend": () => (/* binding */ HttpXhrBackend),
/* harmony export */   "HttpXsrfTokenExtractor": () => (/* binding */ HttpXsrfTokenExtractor),
/* harmony export */   "JsonpClientBackend": () => (/* binding */ JsonpClientBackend),
/* harmony export */   "JsonpInterceptor": () => (/* binding */ JsonpInterceptor),
/* harmony export */   "XhrFactory": () => (/* binding */ XhrFactory),
/* harmony export */   "ɵHttpInterceptingHandler": () => (/* binding */ HttpInterceptingHandler),
/* harmony export */   "ɵangular_packages_common_http_http_a": () => (/* binding */ NoopInterceptor),
/* harmony export */   "ɵangular_packages_common_http_http_b": () => (/* binding */ JsonpCallbackContext),
/* harmony export */   "ɵangular_packages_common_http_http_c": () => (/* binding */ jsonpCallbackContext),
/* harmony export */   "ɵangular_packages_common_http_http_d": () => (/* binding */ XSRF_COOKIE_NAME),
/* harmony export */   "ɵangular_packages_common_http_http_e": () => (/* binding */ XSRF_HEADER_NAME),
/* harmony export */   "ɵangular_packages_common_http_http_f": () => (/* binding */ HttpXsrfCookieExtractor),
/* harmony export */   "ɵangular_packages_common_http_http_g": () => (/* binding */ HttpXsrfInterceptor)
/* harmony export */ });
/* harmony import */ var _angular_common__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(6222);
/* harmony import */ var _angular_common__WEBPACK_IMPORTED_MODULE_0___default = /*#__PURE__*/__webpack_require__.n(_angular_common__WEBPACK_IMPORTED_MODULE_0__);
/* harmony import */ var _angular_core__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(1426);
/* harmony import */ var _angular_core__WEBPACK_IMPORTED_MODULE_1___default = /*#__PURE__*/__webpack_require__.n(_angular_core__WEBPACK_IMPORTED_MODULE_1__);
/* harmony import */ var rxjs__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(5917);
/* harmony import */ var rxjs__WEBPACK_IMPORTED_MODULE_6__ = __webpack_require__(7574);
/* harmony import */ var rxjs_operators__WEBPACK_IMPORTED_MODULE_3__ = __webpack_require__(4612);
/* harmony import */ var rxjs_operators__WEBPACK_IMPORTED_MODULE_4__ = __webpack_require__(5435);
/* harmony import */ var rxjs_operators__WEBPACK_IMPORTED_MODULE_5__ = __webpack_require__(8002);
/**
 * @license Angular v12.2.11
 * (c) 2010-2021 Google LLC. https://angular.io/
 * License: MIT
 */




/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Transforms an `HttpRequest` into a stream of `HttpEvent`s, one of which will likely be a
 * `HttpResponse`.
 *
 * `HttpHandler` is injectable. When injected, the handler instance dispatches requests to the
 * first interceptor in the chain, which dispatches to the second, etc, eventually reaching the
 * `HttpBackend`.
 *
 * In an `HttpInterceptor`, the `HttpHandler` parameter is the next interceptor in the chain.
 *
 * @publicApi
 */




class HttpHandler {}
/**
 * A final `HttpHandler` which will dispatch the request via browser HTTP APIs to a backend.
 *
 * Interceptors sit between the `HttpClient` interface and the `HttpBackend`.
 *
 * When injected, `HttpBackend` dispatches requests directly to the backend, without going
 * through the interceptor chain.
 *
 * @publicApi
 */


class HttpBackend {}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Represents the header configuration options for an HTTP request.
 * Instances are immutable. Modifying methods return a cloned
 * instance with the change. The original object is never changed.
 *
 * @publicApi
 */


class HttpHeaders {
  /**  Constructs a new HTTP header object with the given values.*/
  constructor(headers) {
    /**
     * Internal map of lowercased header names to the normalized
     * form of the name (the form seen first).
     */
    this.normalizedNames = new Map();
    /**
     * Queued updates to be materialized the next initialization.
     */

    this.lazyUpdate = null;

    if (!headers) {
      this.headers = new Map();
    } else if (typeof headers === 'string') {
      this.lazyInit = () => {
        this.headers = new Map();
        headers.split('\n').forEach(line => {
          const index = line.indexOf(':');

          if (index > 0) {
            const name = line.slice(0, index);
            const key = name.toLowerCase();
            const value = line.slice(index + 1).trim();
            this.maybeSetNormalizedName(name, key);

            if (this.headers.has(key)) {
              this.headers.get(key).push(value);
            } else {
              this.headers.set(key, [value]);
            }
          }
        });
      };
    } else {
      this.lazyInit = () => {
        this.headers = new Map();
        Object.keys(headers).forEach(name => {
          let values = headers[name];
          const key = name.toLowerCase();

          if (typeof values === 'string') {
            values = [values];
          }

          if (values.length > 0) {
            this.headers.set(key, values);
            this.maybeSetNormalizedName(name, key);
          }
        });
      };
    }
  }
  /**
   * Checks for existence of a given header.
   *
   * @param name The header name to check for existence.
   *
   * @returns True if the header exists, false otherwise.
   */


  has(name) {
    this.init();
    return this.headers.has(name.toLowerCase());
  }
  /**
   * Retrieves the first value of a given header.
   *
   * @param name The header name.
   *
   * @returns The value string if the header exists, null otherwise
   */


  get(name) {
    this.init();
    const values = this.headers.get(name.toLowerCase());
    return values && values.length > 0 ? values[0] : null;
  }
  /**
   * Retrieves the names of the headers.
   *
   * @returns A list of header names.
   */


  keys() {
    this.init();
    return Array.from(this.normalizedNames.values());
  }
  /**
   * Retrieves a list of values for a given header.
   *
   * @param name The header name from which to retrieve values.
   *
   * @returns A string of values if the header exists, null otherwise.
   */


  getAll(name) {
    this.init();
    return this.headers.get(name.toLowerCase()) || null;
  }
  /**
   * Appends a new value to the existing set of values for a header
   * and returns them in a clone of the original instance.
   *
   * @param name The header name for which to append the values.
   * @param value The value to append.
   *
   * @returns A clone of the HTTP headers object with the value appended to the given header.
   */


  append(name, value) {
    return this.clone({
      name,
      value,
      op: 'a'
    });
  }
  /**
   * Sets or modifies a value for a given header in a clone of the original instance.
   * If the header already exists, its value is replaced with the given value
   * in the returned object.
   *
   * @param name The header name.
   * @param value The value or values to set or overide for the given header.
   *
   * @returns A clone of the HTTP headers object with the newly set header value.
   */


  set(name, value) {
    return this.clone({
      name,
      value,
      op: 's'
    });
  }
  /**
   * Deletes values for a given header in a clone of the original instance.
   *
   * @param name The header name.
   * @param value The value or values to delete for the given header.
   *
   * @returns A clone of the HTTP headers object with the given value deleted.
   */


  delete(name, value) {
    return this.clone({
      name,
      value,
      op: 'd'
    });
  }

  maybeSetNormalizedName(name, lcName) {
    if (!this.normalizedNames.has(lcName)) {
      this.normalizedNames.set(lcName, name);
    }
  }

  init() {
    if (!!this.lazyInit) {
      if (this.lazyInit instanceof HttpHeaders) {
        this.copyFrom(this.lazyInit);
      } else {
        this.lazyInit();
      }

      this.lazyInit = null;

      if (!!this.lazyUpdate) {
        this.lazyUpdate.forEach(update => this.applyUpdate(update));
        this.lazyUpdate = null;
      }
    }
  }

  copyFrom(other) {
    other.init();
    Array.from(other.headers.keys()).forEach(key => {
      this.headers.set(key, other.headers.get(key));
      this.normalizedNames.set(key, other.normalizedNames.get(key));
    });
  }

  clone(update) {
    const clone = new HttpHeaders();
    clone.lazyInit = !!this.lazyInit && this.lazyInit instanceof HttpHeaders ? this.lazyInit : this;
    clone.lazyUpdate = (this.lazyUpdate || []).concat([update]);
    return clone;
  }

  applyUpdate(update) {
    const key = update.name.toLowerCase();

    switch (update.op) {
      case 'a':
      case 's':
        let value = update.value;

        if (typeof value === 'string') {
          value = [value];
        }

        if (value.length === 0) {
          return;
        }

        this.maybeSetNormalizedName(update.name, key);
        const base = (update.op === 'a' ? this.headers.get(key) : undefined) || [];
        base.push(...value);
        this.headers.set(key, base);
        break;

      case 'd':
        const toDelete = update.value;

        if (!toDelete) {
          this.headers.delete(key);
          this.normalizedNames.delete(key);
        } else {
          let existing = this.headers.get(key);

          if (!existing) {
            return;
          }

          existing = existing.filter(value => toDelete.indexOf(value) === -1);

          if (existing.length === 0) {
            this.headers.delete(key);
            this.normalizedNames.delete(key);
          } else {
            this.headers.set(key, existing);
          }
        }

        break;
    }
  }
  /**
   * @internal
   */


  forEach(fn) {
    this.init();
    Array.from(this.normalizedNames.keys()).forEach(key => fn(this.normalizedNames.get(key), this.headers.get(key)));
  }

}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Provides encoding and decoding of URL parameter and query-string values.
 *
 * Serializes and parses URL parameter keys and values to encode and decode them.
 * If you pass URL query parameters without encoding,
 * the query parameters can be misinterpreted at the receiving end.
 *
 *
 * @publicApi
 */


class HttpUrlEncodingCodec {
  /**
   * Encodes a key name for a URL parameter or query-string.
   * @param key The key name.
   * @returns The encoded key name.
   */
  encodeKey(key) {
    return standardEncoding(key);
  }
  /**
   * Encodes the value of a URL parameter or query-string.
   * @param value The value.
   * @returns The encoded value.
   */


  encodeValue(value) {
    return standardEncoding(value);
  }
  /**
   * Decodes an encoded URL parameter or query-string key.
   * @param key The encoded key name.
   * @returns The decoded key name.
   */


  decodeKey(key) {
    return decodeURIComponent(key);
  }
  /**
   * Decodes an encoded URL parameter or query-string value.
   * @param value The encoded value.
   * @returns The decoded value.
   */


  decodeValue(value) {
    return decodeURIComponent(value);
  }

}

function paramParser(rawParams, codec) {
  const map = new Map();

  if (rawParams.length > 0) {
    // The `window.location.search` can be used while creating an instance of the `HttpParams` class
    // (e.g. `new HttpParams({ fromString: window.location.search })`). The `window.location.search`
    // may start with the `?` char, so we strip it if it's present.
    const params = rawParams.replace(/^\?/, '').split('&');
    params.forEach(param => {
      const eqIdx = param.indexOf('=');
      const [key, val] = eqIdx == -1 ? [codec.decodeKey(param), ''] : [codec.decodeKey(param.slice(0, eqIdx)), codec.decodeValue(param.slice(eqIdx + 1))];
      const list = map.get(key) || [];
      list.push(val);
      map.set(key, list);
    });
  }

  return map;
}
/**
 * Encode input string with standard encodeURIComponent and then un-encode specific characters.
 */


const STANDARD_ENCODING_REGEX = /%(\d[a-f0-9])/gi;
const STANDARD_ENCODING_REPLACEMENTS = {
  '40': '@',
  '3A': ':',
  '24': '$',
  '2C': ',',
  '3B': ';',
  '2B': '+',
  '3D': '=',
  '3F': '?',
  '2F': '/'
};

function standardEncoding(v) {
  return encodeURIComponent(v).replace(STANDARD_ENCODING_REGEX, (s, t) => {
    var _a;

    return (_a = STANDARD_ENCODING_REPLACEMENTS[t]) !== null && _a !== void 0 ? _a : s;
  });
}

function valueToString(value) {
  return `${value}`;
}
/**
 * An HTTP request/response body that represents serialized parameters,
 * per the MIME type `application/x-www-form-urlencoded`.
 *
 * This class is immutable; all mutation operations return a new instance.
 *
 * @publicApi
 */


class HttpParams {
  constructor(options = {}) {
    this.updates = null;
    this.cloneFrom = null;
    this.encoder = options.encoder || new HttpUrlEncodingCodec();

    if (!!options.fromString) {
      if (!!options.fromObject) {
        throw new Error(`Cannot specify both fromString and fromObject.`);
      }

      this.map = paramParser(options.fromString, this.encoder);
    } else if (!!options.fromObject) {
      this.map = new Map();
      Object.keys(options.fromObject).forEach(key => {
        const value = options.fromObject[key];
        this.map.set(key, Array.isArray(value) ? value : [value]);
      });
    } else {
      this.map = null;
    }
  }
  /**
   * Reports whether the body includes one or more values for a given parameter.
   * @param param The parameter name.
   * @returns True if the parameter has one or more values,
   * false if it has no value or is not present.
   */


  has(param) {
    this.init();
    return this.map.has(param);
  }
  /**
   * Retrieves the first value for a parameter.
   * @param param The parameter name.
   * @returns The first value of the given parameter,
   * or `null` if the parameter is not present.
   */


  get(param) {
    this.init();
    const res = this.map.get(param);
    return !!res ? res[0] : null;
  }
  /**
   * Retrieves all values for a  parameter.
   * @param param The parameter name.
   * @returns All values in a string array,
   * or `null` if the parameter not present.
   */


  getAll(param) {
    this.init();
    return this.map.get(param) || null;
  }
  /**
   * Retrieves all the parameters for this body.
   * @returns The parameter names in a string array.
   */


  keys() {
    this.init();
    return Array.from(this.map.keys());
  }
  /**
   * Appends a new value to existing values for a parameter.
   * @param param The parameter name.
   * @param value The new value to add.
   * @return A new body with the appended value.
   */


  append(param, value) {
    return this.clone({
      param,
      value,
      op: 'a'
    });
  }
  /**
   * Constructs a new body with appended values for the given parameter name.
   * @param params parameters and values
   * @return A new body with the new value.
   */


  appendAll(params) {
    const updates = [];
    Object.keys(params).forEach(param => {
      const value = params[param];

      if (Array.isArray(value)) {
        value.forEach(_value => {
          updates.push({
            param,
            value: _value,
            op: 'a'
          });
        });
      } else {
        updates.push({
          param,
          value: value,
          op: 'a'
        });
      }
    });
    return this.clone(updates);
  }
  /**
   * Replaces the value for a parameter.
   * @param param The parameter name.
   * @param value The new value.
   * @return A new body with the new value.
   */


  set(param, value) {
    return this.clone({
      param,
      value,
      op: 's'
    });
  }
  /**
   * Removes a given value or all values from a parameter.
   * @param param The parameter name.
   * @param value The value to remove, if provided.
   * @return A new body with the given value removed, or with all values
   * removed if no value is specified.
   */


  delete(param, value) {
    return this.clone({
      param,
      value,
      op: 'd'
    });
  }
  /**
   * Serializes the body to an encoded string, where key-value pairs (separated by `=`) are
   * separated by `&`s.
   */


  toString() {
    this.init();
    return this.keys().map(key => {
      const eKey = this.encoder.encodeKey(key); // `a: ['1']` produces `'a=1'`
      // `b: []` produces `''`
      // `c: ['1', '2']` produces `'c=1&c=2'`

      return this.map.get(key).map(value => eKey + '=' + this.encoder.encodeValue(value)).join('&');
    }) // filter out empty values because `b: []` produces `''`
    // which results in `a=1&&c=1&c=2` instead of `a=1&c=1&c=2` if we don't
    .filter(param => param !== '').join('&');
  }

  clone(update) {
    const clone = new HttpParams({
      encoder: this.encoder
    });
    clone.cloneFrom = this.cloneFrom || this;
    clone.updates = (this.updates || []).concat(update);
    return clone;
  }

  init() {
    if (this.map === null) {
      this.map = new Map();
    }

    if (this.cloneFrom !== null) {
      this.cloneFrom.init();
      this.cloneFrom.keys().forEach(key => this.map.set(key, this.cloneFrom.map.get(key)));
      this.updates.forEach(update => {
        switch (update.op) {
          case 'a':
          case 's':
            const base = (update.op === 'a' ? this.map.get(update.param) : undefined) || [];
            base.push(valueToString(update.value));
            this.map.set(update.param, base);
            break;

          case 'd':
            if (update.value !== undefined) {
              let base = this.map.get(update.param) || [];
              const idx = base.indexOf(valueToString(update.value));

              if (idx !== -1) {
                base.splice(idx, 1);
              }

              if (base.length > 0) {
                this.map.set(update.param, base);
              } else {
                this.map.delete(update.param);
              }
            } else {
              this.map.delete(update.param);
              break;
            }

        }
      });
      this.cloneFrom = this.updates = null;
    }
  }

}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * A token used to manipulate and access values stored in `HttpContext`.
 *
 * @publicApi
 */


class HttpContextToken {
  constructor(defaultValue) {
    this.defaultValue = defaultValue;
  }

}
/**
 * Http context stores arbitrary user defined values and ensures type safety without
 * actually knowing the types. It is backed by a `Map` and guarantees that keys do not clash.
 *
 * This context is mutable and is shared between cloned requests unless explicitly specified.
 *
 * @usageNotes
 *
 * ### Usage Example
 *
 * ```typescript
 * // inside cache.interceptors.ts
 * export const IS_CACHE_ENABLED = new HttpContextToken<boolean>(() => false);
 *
 * export class CacheInterceptor implements HttpInterceptor {
 *
 *   intercept(req: HttpRequest<any>, delegate: HttpHandler): Observable<HttpEvent<any>> {
 *     if (req.context.get(IS_CACHE_ENABLED) === true) {
 *       return ...;
 *     }
 *     return delegate.handle(req);
 *   }
 * }
 *
 * // inside a service
 *
 * this.httpClient.get('/api/weather', {
 *   context: new HttpContext().set(IS_CACHE_ENABLED, true)
 * }).subscribe(...);
 * ```
 *
 * @publicApi
 */


class HttpContext {
  constructor() {
    this.map = new Map();
  }
  /**
   * Store a value in the context. If a value is already present it will be overwritten.
   *
   * @param token The reference to an instance of `HttpContextToken`.
   * @param value The value to store.
   *
   * @returns A reference to itself for easy chaining.
   */


  set(token, value) {
    this.map.set(token, value);
    return this;
  }
  /**
   * Retrieve the value associated with the given token.
   *
   * @param token The reference to an instance of `HttpContextToken`.
   *
   * @returns The stored value or default if one is defined.
   */


  get(token) {
    if (!this.map.has(token)) {
      this.map.set(token, token.defaultValue());
    }

    return this.map.get(token);
  }
  /**
   * Delete the value associated with the given token.
   *
   * @param token The reference to an instance of `HttpContextToken`.
   *
   * @returns A reference to itself for easy chaining.
   */


  delete(token) {
    this.map.delete(token);
    return this;
  }
  /**
   * @returns a list of tokens currently stored in the context.
   */


  keys() {
    return this.map.keys();
  }

}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Determine whether the given HTTP method may include a body.
 */


function mightHaveBody(method) {
  switch (method) {
    case 'DELETE':
    case 'GET':
    case 'HEAD':
    case 'OPTIONS':
    case 'JSONP':
      return false;

    default:
      return true;
  }
}
/**
 * Safely assert whether the given value is an ArrayBuffer.
 *
 * In some execution environments ArrayBuffer is not defined.
 */


function isArrayBuffer(value) {
  return typeof ArrayBuffer !== 'undefined' && value instanceof ArrayBuffer;
}
/**
 * Safely assert whether the given value is a Blob.
 *
 * In some execution environments Blob is not defined.
 */


function isBlob(value) {
  return typeof Blob !== 'undefined' && value instanceof Blob;
}
/**
 * Safely assert whether the given value is a FormData instance.
 *
 * In some execution environments FormData is not defined.
 */


function isFormData(value) {
  return typeof FormData !== 'undefined' && value instanceof FormData;
}
/**
 * Safely assert whether the given value is a URLSearchParams instance.
 *
 * In some execution environments URLSearchParams is not defined.
 */


function isUrlSearchParams(value) {
  return typeof URLSearchParams !== 'undefined' && value instanceof URLSearchParams;
}
/**
 * An outgoing HTTP request with an optional typed body.
 *
 * `HttpRequest` represents an outgoing request, including URL, method,
 * headers, body, and other request configuration options. Instances should be
 * assumed to be immutable. To modify a `HttpRequest`, the `clone`
 * method should be used.
 *
 * @publicApi
 */


class HttpRequest {
  constructor(method, url, third, fourth) {
    this.url = url;
    /**
     * The request body, or `null` if one isn't set.
     *
     * Bodies are not enforced to be immutable, as they can include a reference to any
     * user-defined data type. However, interceptors should take care to preserve
     * idempotence by treating them as such.
     */

    this.body = null;
    /**
     * Whether this request should be made in a way that exposes progress events.
     *
     * Progress events are expensive (change detection runs on each event) and so
     * they should only be requested if the consumer intends to monitor them.
     */

    this.reportProgress = false;
    /**
     * Whether this request should be sent with outgoing credentials (cookies).
     */

    this.withCredentials = false;
    /**
     * The expected response type of the server.
     *
     * This is used to parse the response appropriately before returning it to
     * the requestee.
     */

    this.responseType = 'json';
    this.method = method.toUpperCase(); // Next, need to figure out which argument holds the HttpRequestInit
    // options, if any.

    let options; // Check whether a body argument is expected. The only valid way to omit
    // the body argument is to use a known no-body method like GET.

    if (mightHaveBody(this.method) || !!fourth) {
      // Body is the third argument, options are the fourth.
      this.body = third !== undefined ? third : null;
      options = fourth;
    } else {
      // No body required, options are the third argument. The body stays null.
      options = third;
    } // If options have been passed, interpret them.


    if (options) {
      // Normalize reportProgress and withCredentials.
      this.reportProgress = !!options.reportProgress;
      this.withCredentials = !!options.withCredentials; // Override default response type of 'json' if one is provided.

      if (!!options.responseType) {
        this.responseType = options.responseType;
      } // Override headers if they're provided.


      if (!!options.headers) {
        this.headers = options.headers;
      }

      if (!!options.context) {
        this.context = options.context;
      }

      if (!!options.params) {
        this.params = options.params;
      }
    } // If no headers have been passed in, construct a new HttpHeaders instance.


    if (!this.headers) {
      this.headers = new HttpHeaders();
    } // If no context have been passed in, construct a new HttpContext instance.


    if (!this.context) {
      this.context = new HttpContext();
    } // If no parameters have been passed in, construct a new HttpUrlEncodedParams instance.


    if (!this.params) {
      this.params = new HttpParams();
      this.urlWithParams = url;
    } else {
      // Encode the parameters to a string in preparation for inclusion in the URL.
      const params = this.params.toString();

      if (params.length === 0) {
        // No parameters, the visible URL is just the URL given at creation time.
        this.urlWithParams = url;
      } else {
        // Does the URL already have query parameters? Look for '?'.
        const qIdx = url.indexOf('?'); // There are 3 cases to handle:
        // 1) No existing parameters -> append '?' followed by params.
        // 2) '?' exists and is followed by existing query string ->
        //    append '&' followed by params.
        // 3) '?' exists at the end of the url -> append params directly.
        // This basically amounts to determining the character, if any, with
        // which to join the URL and parameters.

        const sep = qIdx === -1 ? '?' : qIdx < url.length - 1 ? '&' : '';
        this.urlWithParams = url + sep + params;
      }
    }
  }
  /**
   * Transform the free-form body into a serialized format suitable for
   * transmission to the server.
   */


  serializeBody() {
    // If no body is present, no need to serialize it.
    if (this.body === null) {
      return null;
    } // Check whether the body is already in a serialized form. If so,
    // it can just be returned directly.


    if (isArrayBuffer(this.body) || isBlob(this.body) || isFormData(this.body) || isUrlSearchParams(this.body) || typeof this.body === 'string') {
      return this.body;
    } // Check whether the body is an instance of HttpUrlEncodedParams.


    if (this.body instanceof HttpParams) {
      return this.body.toString();
    } // Check whether the body is an object or array, and serialize with JSON if so.


    if (typeof this.body === 'object' || typeof this.body === 'boolean' || Array.isArray(this.body)) {
      return JSON.stringify(this.body);
    } // Fall back on toString() for everything else.


    return this.body.toString();
  }
  /**
   * Examine the body and attempt to infer an appropriate MIME type
   * for it.
   *
   * If no such type can be inferred, this method will return `null`.
   */


  detectContentTypeHeader() {
    // An empty body has no content type.
    if (this.body === null) {
      return null;
    } // FormData bodies rely on the browser's content type assignment.


    if (isFormData(this.body)) {
      return null;
    } // Blobs usually have their own content type. If it doesn't, then
    // no type can be inferred.


    if (isBlob(this.body)) {
      return this.body.type || null;
    } // Array buffers have unknown contents and thus no type can be inferred.


    if (isArrayBuffer(this.body)) {
      return null;
    } // Technically, strings could be a form of JSON data, but it's safe enough
    // to assume they're plain strings.


    if (typeof this.body === 'string') {
      return 'text/plain';
    } // `HttpUrlEncodedParams` has its own content-type.


    if (this.body instanceof HttpParams) {
      return 'application/x-www-form-urlencoded;charset=UTF-8';
    } // Arrays, objects, boolean and numbers will be encoded as JSON.


    if (typeof this.body === 'object' || typeof this.body === 'number' || typeof this.body === 'boolean') {
      return 'application/json';
    } // No type could be inferred.


    return null;
  }

  clone(update = {}) {
    var _a; // For method, url, and responseType, take the current value unless
    // it is overridden in the update hash.


    const method = update.method || this.method;
    const url = update.url || this.url;
    const responseType = update.responseType || this.responseType; // The body is somewhat special - a `null` value in update.body means
    // whatever current body is present is being overridden with an empty
    // body, whereas an `undefined` value in update.body implies no
    // override.

    const body = update.body !== undefined ? update.body : this.body; // Carefully handle the boolean options to differentiate between
    // `false` and `undefined` in the update args.

    const withCredentials = update.withCredentials !== undefined ? update.withCredentials : this.withCredentials;
    const reportProgress = update.reportProgress !== undefined ? update.reportProgress : this.reportProgress; // Headers and params may be appended to if `setHeaders` or
    // `setParams` are used.

    let headers = update.headers || this.headers;
    let params = update.params || this.params; // Pass on context if needed

    const context = (_a = update.context) !== null && _a !== void 0 ? _a : this.context; // Check whether the caller has asked to add headers.

    if (update.setHeaders !== undefined) {
      // Set every requested header.
      headers = Object.keys(update.setHeaders).reduce((headers, name) => headers.set(name, update.setHeaders[name]), headers);
    } // Check whether the caller has asked to set params.


    if (update.setParams) {
      // Set every requested param.
      params = Object.keys(update.setParams).reduce((params, param) => params.set(param, update.setParams[param]), params);
    } // Finally, construct the new HttpRequest using the pieces from above.


    return new HttpRequest(method, url, body, {
      params,
      headers,
      context,
      reportProgress,
      responseType,
      withCredentials
    });
  }

}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Type enumeration for the different kinds of `HttpEvent`.
 *
 * @publicApi
 */


var HttpEventType = /*#__PURE__*/(() => {
  HttpEventType = HttpEventType || {};

  /**
   * The request was sent out over the wire.
   */
  HttpEventType[HttpEventType["Sent"] = 0] = "Sent";
  /**
   * An upload progress event was received.
   */

  HttpEventType[HttpEventType["UploadProgress"] = 1] = "UploadProgress";
  /**
   * The response status code and headers were received.
   */

  HttpEventType[HttpEventType["ResponseHeader"] = 2] = "ResponseHeader";
  /**
   * A download progress event was received.
   */

  HttpEventType[HttpEventType["DownloadProgress"] = 3] = "DownloadProgress";
  /**
   * The full response including the body was received.
   */

  HttpEventType[HttpEventType["Response"] = 4] = "Response";
  /**
   * A custom event from an interceptor or a backend.
   */

  HttpEventType[HttpEventType["User"] = 5] = "User";
  return HttpEventType;
})();

/**
 * Base class for both `HttpResponse` and `HttpHeaderResponse`.
 *
 * @publicApi
 */
class HttpResponseBase {
  /**
   * Super-constructor for all responses.
   *
   * The single parameter accepted is an initialization hash. Any properties
   * of the response passed there will override the default values.
   */
  constructor(init, defaultStatus = 200
  /* Ok */
  , defaultStatusText = 'OK') {
    // If the hash has values passed, use them to initialize the response.
    // Otherwise use the default values.
    this.headers = init.headers || new HttpHeaders();
    this.status = init.status !== undefined ? init.status : defaultStatus;
    this.statusText = init.statusText || defaultStatusText;
    this.url = init.url || null; // Cache the ok value to avoid defining a getter.

    this.ok = this.status >= 200 && this.status < 300;
  }

}
/**
 * A partial HTTP response which only includes the status and header data,
 * but no response body.
 *
 * `HttpHeaderResponse` is a `HttpEvent` available on the response
 * event stream, only when progress events are requested.
 *
 * @publicApi
 */


class HttpHeaderResponse extends HttpResponseBase {
  /**
   * Create a new `HttpHeaderResponse` with the given parameters.
   */
  constructor(init = {}) {
    super(init);
    this.type = HttpEventType.ResponseHeader;
  }
  /**
   * Copy this `HttpHeaderResponse`, overriding its contents with the
   * given parameter hash.
   */


  clone(update = {}) {
    // Perform a straightforward initialization of the new HttpHeaderResponse,
    // overriding the current parameters with new ones if given.
    return new HttpHeaderResponse({
      headers: update.headers || this.headers,
      status: update.status !== undefined ? update.status : this.status,
      statusText: update.statusText || this.statusText,
      url: update.url || this.url || undefined
    });
  }

}
/**
 * A full HTTP response, including a typed response body (which may be `null`
 * if one was not returned).
 *
 * `HttpResponse` is a `HttpEvent` available on the response event
 * stream.
 *
 * @publicApi
 */


class HttpResponse extends HttpResponseBase {
  /**
   * Construct a new `HttpResponse`.
   */
  constructor(init = {}) {
    super(init);
    this.type = HttpEventType.Response;
    this.body = init.body !== undefined ? init.body : null;
  }

  clone(update = {}) {
    return new HttpResponse({
      body: update.body !== undefined ? update.body : this.body,
      headers: update.headers || this.headers,
      status: update.status !== undefined ? update.status : this.status,
      statusText: update.statusText || this.statusText,
      url: update.url || this.url || undefined
    });
  }

}
/**
 * A response that represents an error or failure, either from a
 * non-successful HTTP status, an error while executing the request,
 * or some other failure which occurred during the parsing of the response.
 *
 * Any error returned on the `Observable` response stream will be
 * wrapped in an `HttpErrorResponse` to provide additional context about
 * the state of the HTTP layer when the error occurred. The error property
 * will contain either a wrapped Error object or the error response returned
 * from the server.
 *
 * @publicApi
 */


class HttpErrorResponse extends HttpResponseBase {
  constructor(init) {
    // Initialize with a default status of 0 / Unknown Error.
    super(init, 0, 'Unknown Error');
    this.name = 'HttpErrorResponse';
    /**
     * Errors are never okay, even when the status code is in the 2xx success range.
     */

    this.ok = false; // If the response was successful, then this was a parse error. Otherwise, it was
    // a protocol-level failure of some sort. Either the request failed in transit
    // or the server returned an unsuccessful status code.

    if (this.status >= 200 && this.status < 300) {
      this.message = `Http failure during parsing for ${init.url || '(unknown url)'}`;
    } else {
      this.message = `Http failure response for ${init.url || '(unknown url)'}: ${init.status} ${init.statusText}`;
    }

    this.error = init.error || null;
  }

}
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Constructs an instance of `HttpRequestOptions<T>` from a source `HttpMethodOptions` and
 * the given `body`. This function clones the object and adds the body.
 *
 * Note that the `responseType` *options* value is a String that identifies the
 * single data type of the response.
 * A single overload version of the method handles each response type.
 * The value of `responseType` cannot be a union, as the combined signature could imply.
 *
 */


function addBody(options, body) {
  return {
    body,
    headers: options.headers,
    context: options.context,
    observe: options.observe,
    params: options.params,
    reportProgress: options.reportProgress,
    responseType: options.responseType,
    withCredentials: options.withCredentials
  };
}
/**
 * Performs HTTP requests.
 * This service is available as an injectable class, with methods to perform HTTP requests.
 * Each request method has multiple signatures, and the return type varies based on
 * the signature that is called (mainly the values of `observe` and `responseType`).
 *
 * Note that the `responseType` *options* value is a String that identifies the
 * single data type of the response.
 * A single overload version of the method handles each response type.
 * The value of `responseType` cannot be a union, as the combined signature could imply.

 *
 * @usageNotes
 * Sample HTTP requests for the [Tour of Heroes](/tutorial/toh-pt0) application.
 *
 * ### HTTP Request Example
 *
 * ```
 *  // GET heroes whose name contains search term
 * searchHeroes(term: string): observable<Hero[]>{
 *
 *  const params = new HttpParams({fromString: 'name=term'});
 *    return this.httpClient.request('GET', this.heroesUrl, {responseType:'json', params});
 * }
 * ```
 *
 * Alternatively, the parameter string can be used without invoking HttpParams
 * by directly joining to the URL.
 * ```
 * this.httpClient.request('GET', this.heroesUrl + '?' + 'name=term', {responseType:'json'});
 * ```
 *
 *
 * ### JSONP Example
 * ```
 * requestJsonp(url, callback = 'callback') {
 *  return this.httpClient.jsonp(this.heroesURL, callback);
 * }
 * ```
 *
 * ### PATCH Example
 * ```
 * // PATCH one of the heroes' name
 * patchHero (id: number, heroName: string): Observable<{}> {
 * const url = `${this.heroesUrl}/${id}`;   // PATCH api/heroes/42
 *  return this.httpClient.patch(url, {name: heroName}, httpOptions)
 *    .pipe(catchError(this.handleError('patchHero')));
 * }
 * ```
 *
 * @see [HTTP Guide](guide/http)
 * @see [HTTP Request](api/common/http/HttpRequest)
 *
 * @publicApi
 */


let HttpClient = /*#__PURE__*/(() => {
  class HttpClient {
    constructor(handler) {
      this.handler = handler;
    }
    /**
     * Constructs an observable for a generic HTTP request that, when subscribed,
     * fires the request through the chain of registered interceptors and on to the
     * server.
     *
     * You can pass an `HttpRequest` directly as the only parameter. In this case,
     * the call returns an observable of the raw `HttpEvent` stream.
     *
     * Alternatively you can pass an HTTP method as the first parameter,
     * a URL string as the second, and an options hash containing the request body as the third.
     * See `addBody()`. In this case, the specified `responseType` and `observe` options determine the
     * type of returned observable.
     *   * The `responseType` value determines how a successful response body is parsed.
     *   * If `responseType` is the default `json`, you can pass a type interface for the resulting
     * object as a type parameter to the call.
     *
     * The `observe` value determines the return type, according to what you are interested in
     * observing.
     *   * An `observe` value of events returns an observable of the raw `HttpEvent` stream, including
     * progress events by default.
     *   * An `observe` value of response returns an observable of `HttpResponse<T>`,
     * where the `T` parameter depends on the `responseType` and any optionally provided type
     * parameter.
     *   * An `observe` value of body returns an observable of `<T>` with the same `T` body type.
     *
     */


    request(first, url, options = {}) {
      let req; // First, check whether the primary argument is an instance of `HttpRequest`.

      if (first instanceof HttpRequest) {
        // It is. The other arguments must be undefined (per the signatures) and can be
        // ignored.
        req = first;
      } else {
        // It's a string, so it represents a URL. Construct a request based on it,
        // and incorporate the remaining arguments (assuming `GET` unless a method is
        // provided.
        // Figure out the headers.
        let headers = undefined;

        if (options.headers instanceof HttpHeaders) {
          headers = options.headers;
        } else {
          headers = new HttpHeaders(options.headers);
        } // Sort out parameters.


        let params = undefined;

        if (!!options.params) {
          if (options.params instanceof HttpParams) {
            params = options.params;
          } else {
            params = new HttpParams({
              fromObject: options.params
            });
          }
        } // Construct the request.


        req = new HttpRequest(first, url, options.body !== undefined ? options.body : null, {
          headers,
          context: options.context,
          params,
          reportProgress: options.reportProgress,
          // By default, JSON is assumed to be returned for all calls.
          responseType: options.responseType || 'json',
          withCredentials: options.withCredentials
        });
      } // Start with an Observable.of() the initial request, and run the handler (which
      // includes all interceptors) inside a concatMap(). This way, the handler runs
      // inside an Observable chain, which causes interceptors to be re-run on every
      // subscription (this also makes retries re-run the handler, including interceptors).


      const events$ = (0,rxjs__WEBPACK_IMPORTED_MODULE_2__.of)(req).pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_3__/* .concatMap */ .b)(req => this.handler.handle(req))); // If coming via the API signature which accepts a previously constructed HttpRequest,
      // the only option is to get the event stream. Otherwise, return the event stream if
      // that is what was requested.

      if (first instanceof HttpRequest || options.observe === 'events') {
        return events$;
      } // The requested stream contains either the full response or the body. In either
      // case, the first step is to filter the event stream to extract a stream of
      // responses(s).


      const res$ = events$.pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_4__/* .filter */ .h)(event => event instanceof HttpResponse)); // Decide which stream to return.

      switch (options.observe || 'body') {
        case 'body':
          // The requested stream is the body. Map the response stream to the response
          // body. This could be done more simply, but a misbehaving interceptor might
          // transform the response body into a different format and ignore the requested
          // responseType. Guard against this by validating that the response is of the
          // requested type.
          switch (req.responseType) {
            case 'arraybuffer':
              return res$.pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_5__/* .map */ .U)(res => {
                // Validate that the body is an ArrayBuffer.
                if (res.body !== null && !(res.body instanceof ArrayBuffer)) {
                  throw new Error('Response is not an ArrayBuffer.');
                }

                return res.body;
              }));

            case 'blob':
              return res$.pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_5__/* .map */ .U)(res => {
                // Validate that the body is a Blob.
                if (res.body !== null && !(res.body instanceof Blob)) {
                  throw new Error('Response is not a Blob.');
                }

                return res.body;
              }));

            case 'text':
              return res$.pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_5__/* .map */ .U)(res => {
                // Validate that the body is a string.
                if (res.body !== null && typeof res.body !== 'string') {
                  throw new Error('Response is not a string.');
                }

                return res.body;
              }));

            case 'json':
            default:
              // No validation needed for JSON responses, as they can be of any type.
              return res$.pipe((0,rxjs_operators__WEBPACK_IMPORTED_MODULE_5__/* .map */ .U)(res => res.body));
          }

        case 'response':
          // The response stream was requested directly, so return it.
          return res$;

        default:
          // Guard against new future observe types being added.
          throw new Error(`Unreachable: unhandled observe type ${options.observe}}`);
      }
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `DELETE` request to execute on the server. See the individual overloads for
     * details on the return type.
     *
     * @param url     The endpoint URL.
     * @param options The HTTP options to send with the request.
     *
     */


    delete(url, options = {}) {
      return this.request('DELETE', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `GET` request to execute on the server. See the individual overloads for
     * details on the return type.
     */


    get(url, options = {}) {
      return this.request('GET', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `HEAD` request to execute on the server. The `HEAD` method returns
     * meta information about the resource without transferring the
     * resource itself. See the individual overloads for
     * details on the return type.
     */


    head(url, options = {}) {
      return this.request('HEAD', url, options);
    }
    /**
     * Constructs an `Observable` that, when subscribed, causes a request with the special method
     * `JSONP` to be dispatched via the interceptor pipeline.
     * The [JSONP pattern](https://en.wikipedia.org/wiki/JSONP) works around limitations of certain
     * API endpoints that don't support newer,
     * and preferable [CORS](https://developer.mozilla.org/en-US/docs/Web/HTTP/CORS) protocol.
     * JSONP treats the endpoint API as a JavaScript file and tricks the browser to process the
     * requests even if the API endpoint is not located on the same domain (origin) as the client-side
     * application making the request.
     * The endpoint API must support JSONP callback for JSONP requests to work.
     * The resource API returns the JSON response wrapped in a callback function.
     * You can pass the callback function name as one of the query parameters.
     * Note that JSONP requests can only be used with `GET` requests.
     *
     * @param url The resource URL.
     * @param callbackParam The callback function name.
     *
     */


    jsonp(url, callbackParam) {
      return this.request('JSONP', url, {
        params: new HttpParams().append(callbackParam, 'JSONP_CALLBACK'),
        observe: 'body',
        responseType: 'json'
      });
    }
    /**
     * Constructs an `Observable` that, when subscribed, causes the configured
     * `OPTIONS` request to execute on the server. This method allows the client
     * to determine the supported HTTP methods and other capabilities of an endpoint,
     * without implying a resource action. See the individual overloads for
     * details on the return type.
     */


    options(url, options = {}) {
      return this.request('OPTIONS', url, options);
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `PATCH` request to execute on the server. See the individual overloads for
     * details on the return type.
     */


    patch(url, body, options = {}) {
      return this.request('PATCH', url, addBody(options, body));
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `POST` request to execute on the server. The server responds with the location of
     * the replaced resource. See the individual overloads for
     * details on the return type.
     */


    post(url, body, options = {}) {
      return this.request('POST', url, addBody(options, body));
    }
    /**
     * Constructs an observable that, when subscribed, causes the configured
     * `PUT` request to execute on the server. The `PUT` method replaces an existing resource
     * with a new set of values.
     * See the individual overloads for details on the return type.
     */


    put(url, body, options = {}) {
      return this.request('PUT', url, addBody(options, body));
    }

  }

  HttpClient.ɵfac = function HttpClient_Factory(t) {
    return new (t || HttpClient)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](HttpHandler));
  };

  HttpClient.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: HttpClient,
    factory: HttpClient.ɵfac
  });
  return HttpClient;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * `HttpHandler` which applies an `HttpInterceptor` to an `HttpRequest`.
 *
 *
 */


class HttpInterceptorHandler {
  constructor(next, interceptor) {
    this.next = next;
    this.interceptor = interceptor;
  }

  handle(req) {
    return this.interceptor.intercept(req, this.next);
  }

}
/**
 * A multi-provider token that represents the array of registered
 * `HttpInterceptor` objects.
 *
 * @publicApi
 */


const HTTP_INTERCEPTORS = /*#__PURE__*/new _angular_core__WEBPACK_IMPORTED_MODULE_1__.InjectionToken('HTTP_INTERCEPTORS');
let NoopInterceptor = /*#__PURE__*/(() => {
  class NoopInterceptor {
    intercept(req, next) {
      return next.handle(req);
    }

  }

  NoopInterceptor.ɵfac = function NoopInterceptor_Factory(t) {
    return new (t || NoopInterceptor)();
  };

  NoopInterceptor.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: NoopInterceptor,
    factory: NoopInterceptor.ɵfac
  });
  return NoopInterceptor;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */
// Every request made through JSONP needs a callback name that's unique across the
// whole page. Each request is assigned an id and the callback name is constructed
// from that. The next id to be assigned is tracked in a global variable here that
// is shared among all applications on the page.


let nextRequestId = 0; // Error text given when a JSONP script is injected, but doesn't invoke the callback
// passed in its URL.

const JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.'; // Error text given when a request is passed to the JsonpClientBackend that doesn't
// have a request method JSONP.

const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use JSONP request method.';
const JSONP_ERR_WRONG_RESPONSE_TYPE = 'JSONP requests must use Json response type.';
/**
 * DI token/abstract type representing a map of JSONP callbacks.
 *
 * In the browser, this should always be the `window` object.
 *
 *
 */

class JsonpCallbackContext {}
/**
 * Processes an `HttpRequest` with the JSONP method,
 * by performing JSONP style requests.
 * @see `HttpHandler`
 * @see `HttpXhrBackend`
 *
 * @publicApi
 */


let JsonpClientBackend = /*#__PURE__*/(() => {
  class JsonpClientBackend {
    constructor(callbackMap, document) {
      this.callbackMap = callbackMap;
      this.document = document;
      /**
       * A resolved promise that can be used to schedule microtasks in the event handlers.
       */

      this.resolvedPromise = Promise.resolve();
    }
    /**
     * Get the name of the next callback method, by incrementing the global `nextRequestId`.
     */


    nextCallback() {
      return `ng_jsonp_callback_${nextRequestId++}`;
    }
    /**
     * Processes a JSONP request and returns an event stream of the results.
     * @param req The request object.
     * @returns An observable of the response events.
     *
     */


    handle(req) {
      // Firstly, check both the method and response type. If either doesn't match
      // then the request was improperly routed here and cannot be handled.
      if (req.method !== 'JSONP') {
        throw new Error(JSONP_ERR_WRONG_METHOD);
      } else if (req.responseType !== 'json') {
        throw new Error(JSONP_ERR_WRONG_RESPONSE_TYPE);
      } // Everything else happens inside the Observable boundary.


      return new rxjs__WEBPACK_IMPORTED_MODULE_6__/* .Observable */ .y(observer => {
        // The first step to make a request is to generate the callback name, and replace the
        // callback placeholder in the URL with the name. Care has to be taken here to ensure
        // a trailing &, if matched, gets inserted back into the URL in the correct place.
        const callback = this.nextCallback();
        const url = req.urlWithParams.replace(/=JSONP_CALLBACK(&|$)/, `=${callback}$1`); // Construct the <script> tag and point it at the URL.

        const node = this.document.createElement('script');
        node.src = url; // A JSONP request requires waiting for multiple callbacks. These variables
        // are closed over and track state across those callbacks.
        // The response object, if one has been received, or null otherwise.

        let body = null; // Whether the response callback has been called.

        let finished = false; // Whether the request has been cancelled (and thus any other callbacks)
        // should be ignored.

        let cancelled = false; // Set the response callback in this.callbackMap (which will be the window
        // object in the browser. The script being loaded via the <script> tag will
        // eventually call this callback.

        this.callbackMap[callback] = data => {
          // Data has been received from the JSONP script. Firstly, delete this callback.
          delete this.callbackMap[callback]; // Next, make sure the request wasn't cancelled in the meantime.

          if (cancelled) {
            return;
          } // Set state to indicate data was received.


          body = data;
          finished = true;
        }; // cleanup() is a utility closure that removes the <script> from the page and
        // the response callback from the window. This logic is used in both the
        // success, error, and cancellation paths, so it's extracted out for convenience.


        const cleanup = () => {
          // Remove the <script> tag if it's still on the page.
          if (node.parentNode) {
            node.parentNode.removeChild(node);
          } // Remove the response callback from the callbackMap (window object in the
          // browser).


          delete this.callbackMap[callback];
        }; // onLoad() is the success callback which runs after the response callback
        // if the JSONP script loads successfully. The event itself is unimportant.
        // If something went wrong, onLoad() may run without the response callback
        // having been invoked.


        const onLoad = event => {
          // Do nothing if the request has been cancelled.
          if (cancelled) {
            return;
          } // We wrap it in an extra Promise, to ensure the microtask
          // is scheduled after the loaded endpoint has executed any potential microtask itself,
          // which is not guaranteed in Internet Explorer and EdgeHTML. See issue #39496


          this.resolvedPromise.then(() => {
            // Cleanup the page.
            cleanup(); // Check whether the response callback has run.

            if (!finished) {
              // It hasn't, something went wrong with the request. Return an error via
              // the Observable error path. All JSONP errors have status 0.
              observer.error(new HttpErrorResponse({
                url,
                status: 0,
                statusText: 'JSONP Error',
                error: new Error(JSONP_ERR_NO_CALLBACK)
              }));
              return;
            } // Success. body either contains the response body or null if none was
            // returned.


            observer.next(new HttpResponse({
              body,
              status: 200
              /* Ok */
              ,
              statusText: 'OK',
              url
            })); // Complete the stream, the response is over.

            observer.complete();
          });
        }; // onError() is the error callback, which runs if the script returned generates
        // a Javascript error. It emits the error via the Observable error channel as
        // a HttpErrorResponse.


        const onError = error => {
          // If the request was already cancelled, no need to emit anything.
          if (cancelled) {
            return;
          }

          cleanup(); // Wrap the error in a HttpErrorResponse.

          observer.error(new HttpErrorResponse({
            error,
            status: 0,
            statusText: 'JSONP Error',
            url
          }));
        }; // Subscribe to both the success (load) and error events on the <script> tag,
        // and add it to the page.


        node.addEventListener('load', onLoad);
        node.addEventListener('error', onError);
        this.document.body.appendChild(node); // The request has now been successfully sent.

        observer.next({
          type: HttpEventType.Sent
        }); // Cancellation handler.

        return () => {
          // Track the cancellation so event listeners won't do anything even if already scheduled.
          cancelled = true; // Remove the event listeners so they won't run if the events later fire.

          node.removeEventListener('load', onLoad);
          node.removeEventListener('error', onError); // And finally, clean up the page.

          cleanup();
        };
      });
    }

  }

  JsonpClientBackend.ɵfac = function JsonpClientBackend_Factory(t) {
    return new (t || JsonpClientBackend)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](JsonpCallbackContext), _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](_angular_common__WEBPACK_IMPORTED_MODULE_0__.DOCUMENT));
  };

  JsonpClientBackend.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: JsonpClientBackend,
    factory: JsonpClientBackend.ɵfac
  });
  return JsonpClientBackend;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * Identifies requests with the method JSONP and
 * shifts them to the `JsonpClientBackend`.
 *
 * @see `HttpInterceptor`
 *
 * @publicApi
 */


let JsonpInterceptor = /*#__PURE__*/(() => {
  class JsonpInterceptor {
    constructor(jsonp) {
      this.jsonp = jsonp;
    }
    /**
     * Identifies and handles a given JSONP request.
     * @param req The outgoing request object to handle.
     * @param next The next interceptor in the chain, or the backend
     * if no interceptors remain in the chain.
     * @returns An observable of the event stream.
     */


    intercept(req, next) {
      if (req.method === 'JSONP') {
        return this.jsonp.handle(req);
      } // Fall through for normal HTTP requests.


      return next.handle(req);
    }

  }

  JsonpInterceptor.ɵfac = function JsonpInterceptor_Factory(t) {
    return new (t || JsonpInterceptor)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](JsonpClientBackend));
  };

  JsonpInterceptor.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: JsonpInterceptor,
    factory: JsonpInterceptor.ɵfac
  });
  return JsonpInterceptor;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */


const XSSI_PREFIX = /^\)\]\}',?\n/;
/**
 * Determine an appropriate URL for the response, by checking either
 * XMLHttpRequest.responseURL or the X-Request-URL header.
 */

function getResponseUrl(xhr) {
  if ('responseURL' in xhr && xhr.responseURL) {
    return xhr.responseURL;
  }

  if (/^X-Request-URL:/m.test(xhr.getAllResponseHeaders())) {
    return xhr.getResponseHeader('X-Request-URL');
  }

  return null;
}
/**
 * Uses `XMLHttpRequest` to send requests to a backend server.
 * @see `HttpHandler`
 * @see `JsonpClientBackend`
 *
 * @publicApi
 */


let HttpXhrBackend = /*#__PURE__*/(() => {
  class HttpXhrBackend {
    constructor(xhrFactory) {
      this.xhrFactory = xhrFactory;
    }
    /**
     * Processes a request and returns a stream of response events.
     * @param req The request object.
     * @returns An observable of the response events.
     */


    handle(req) {
      // Quick check to give a better error message when a user attempts to use
      // HttpClient.jsonp() without installing the HttpClientJsonpModule
      if (req.method === 'JSONP') {
        throw new Error(`Attempted to construct Jsonp request without HttpClientJsonpModule installed.`);
      } // Everything happens on Observable subscription.


      return new rxjs__WEBPACK_IMPORTED_MODULE_6__/* .Observable */ .y(observer => {
        // Start by setting up the XHR object with request method, URL, and withCredentials flag.
        const xhr = this.xhrFactory.build();
        xhr.open(req.method, req.urlWithParams);

        if (!!req.withCredentials) {
          xhr.withCredentials = true;
        } // Add all the requested headers.


        req.headers.forEach((name, values) => xhr.setRequestHeader(name, values.join(','))); // Add an Accept header if one isn't present already.

        if (!req.headers.has('Accept')) {
          xhr.setRequestHeader('Accept', 'application/json, text/plain, */*');
        } // Auto-detect the Content-Type header if one isn't present already.


        if (!req.headers.has('Content-Type')) {
          const detectedType = req.detectContentTypeHeader(); // Sometimes Content-Type detection fails.

          if (detectedType !== null) {
            xhr.setRequestHeader('Content-Type', detectedType);
          }
        } // Set the responseType if one was requested.


        if (req.responseType) {
          const responseType = req.responseType.toLowerCase(); // JSON responses need to be processed as text. This is because if the server
          // returns an XSSI-prefixed JSON response, the browser will fail to parse it,
          // xhr.response will be null, and xhr.responseText cannot be accessed to
          // retrieve the prefixed JSON data in order to strip the prefix. Thus, all JSON
          // is parsed by first requesting text and then applying JSON.parse.

          xhr.responseType = responseType !== 'json' ? responseType : 'text';
        } // Serialize the request body if one is present. If not, this will be set to null.


        const reqBody = req.serializeBody(); // If progress events are enabled, response headers will be delivered
        // in two events - the HttpHeaderResponse event and the full HttpResponse
        // event. However, since response headers don't change in between these
        // two events, it doesn't make sense to parse them twice. So headerResponse
        // caches the data extracted from the response whenever it's first parsed,
        // to ensure parsing isn't duplicated.

        let headerResponse = null; // partialFromXhr extracts the HttpHeaderResponse from the current XMLHttpRequest
        // state, and memoizes it into headerResponse.

        const partialFromXhr = () => {
          if (headerResponse !== null) {
            return headerResponse;
          } // Read status and normalize an IE9 bug (https://bugs.jquery.com/ticket/1450).


          const status = xhr.status === 1223 ? 204
          /* NoContent */
          : xhr.status;
          const statusText = xhr.statusText || 'OK'; // Parse headers from XMLHttpRequest - this step is lazy.

          const headers = new HttpHeaders(xhr.getAllResponseHeaders()); // Read the response URL from the XMLHttpResponse instance and fall back on the
          // request URL.

          const url = getResponseUrl(xhr) || req.url; // Construct the HttpHeaderResponse and memoize it.

          headerResponse = new HttpHeaderResponse({
            headers,
            status,
            statusText,
            url
          });
          return headerResponse;
        }; // Next, a few closures are defined for the various events which XMLHttpRequest can
        // emit. This allows them to be unregistered as event listeners later.
        // First up is the load event, which represents a response being fully available.


        const onLoad = () => {
          // Read response state from the memoized partial data.
          let {
            headers,
            status,
            statusText,
            url
          } = partialFromXhr(); // The body will be read out if present.

          let body = null;

          if (status !== 204
          /* NoContent */
          ) {
            // Use XMLHttpRequest.response if set, responseText otherwise.
            body = typeof xhr.response === 'undefined' ? xhr.responseText : xhr.response;
          } // Normalize another potential bug (this one comes from CORS).


          if (status === 0) {
            status = !!body ? 200
            /* Ok */
            : 0;
          } // ok determines whether the response will be transmitted on the event or
          // error channel. Unsuccessful status codes (not 2xx) will always be errors,
          // but a successful status code can still result in an error if the user
          // asked for JSON data and the body cannot be parsed as such.


          let ok = status >= 200 && status < 300; // Check whether the body needs to be parsed as JSON (in many cases the browser
          // will have done that already).

          if (req.responseType === 'json' && typeof body === 'string') {
            // Save the original body, before attempting XSSI prefix stripping.
            const originalBody = body;
            body = body.replace(XSSI_PREFIX, '');

            try {
              // Attempt the parse. If it fails, a parse error should be delivered to the user.
              body = body !== '' ? JSON.parse(body) : null;
            } catch (error) {
              // Since the JSON.parse failed, it's reasonable to assume this might not have been a
              // JSON response. Restore the original body (including any XSSI prefix) to deliver
              // a better error response.
              body = originalBody; // If this was an error request to begin with, leave it as a string, it probably
              // just isn't JSON. Otherwise, deliver the parsing error to the user.

              if (ok) {
                // Even though the response status was 2xx, this is still an error.
                ok = false; // The parse error contains the text of the body that failed to parse.

                body = {
                  error,
                  text: body
                };
              }
            }
          }

          if (ok) {
            // A successful response is delivered on the event stream.
            observer.next(new HttpResponse({
              body,
              headers,
              status,
              statusText,
              url: url || undefined
            })); // The full body has been received and delivered, no further events
            // are possible. This request is complete.

            observer.complete();
          } else {
            // An unsuccessful request is delivered on the error channel.
            observer.error(new HttpErrorResponse({
              // The error in this case is the response body (error from the server).
              error: body,
              headers,
              status,
              statusText,
              url: url || undefined
            }));
          }
        }; // The onError callback is called when something goes wrong at the network level.
        // Connection timeout, DNS error, offline, etc. These are actual errors, and are
        // transmitted on the error channel.


        const onError = error => {
          const {
            url
          } = partialFromXhr();
          const res = new HttpErrorResponse({
            error,
            status: xhr.status || 0,
            statusText: xhr.statusText || 'Unknown Error',
            url: url || undefined
          });
          observer.error(res);
        }; // The sentHeaders flag tracks whether the HttpResponseHeaders event
        // has been sent on the stream. This is necessary to track if progress
        // is enabled since the event will be sent on only the first download
        // progerss event.


        let sentHeaders = false; // The download progress event handler, which is only registered if
        // progress events are enabled.

        const onDownProgress = event => {
          // Send the HttpResponseHeaders event if it hasn't been sent already.
          if (!sentHeaders) {
            observer.next(partialFromXhr());
            sentHeaders = true;
          } // Start building the download progress event to deliver on the response
          // event stream.


          let progressEvent = {
            type: HttpEventType.DownloadProgress,
            loaded: event.loaded
          }; // Set the total number of bytes in the event if it's available.

          if (event.lengthComputable) {
            progressEvent.total = event.total;
          } // If the request was for text content and a partial response is
          // available on XMLHttpRequest, include it in the progress event
          // to allow for streaming reads.


          if (req.responseType === 'text' && !!xhr.responseText) {
            progressEvent.partialText = xhr.responseText;
          } // Finally, fire the event.


          observer.next(progressEvent);
        }; // The upload progress event handler, which is only registered if
        // progress events are enabled.


        const onUpProgress = event => {
          // Upload progress events are simpler. Begin building the progress
          // event.
          let progress = {
            type: HttpEventType.UploadProgress,
            loaded: event.loaded
          }; // If the total number of bytes being uploaded is available, include
          // it.

          if (event.lengthComputable) {
            progress.total = event.total;
          } // Send the event.


          observer.next(progress);
        }; // By default, register for load and error events.


        xhr.addEventListener('load', onLoad);
        xhr.addEventListener('error', onError);
        xhr.addEventListener('timeout', onError);
        xhr.addEventListener('abort', onError); // Progress events are only enabled if requested.

        if (req.reportProgress) {
          // Download progress is always enabled if requested.
          xhr.addEventListener('progress', onDownProgress); // Upload progress depends on whether there is a body to upload.

          if (reqBody !== null && xhr.upload) {
            xhr.upload.addEventListener('progress', onUpProgress);
          }
        } // Fire the request, and notify the event stream that it was fired.


        xhr.send(reqBody);
        observer.next({
          type: HttpEventType.Sent
        }); // This is the return from the Observable function, which is the
        // request cancellation handler.

        return () => {
          // On a cancellation, remove all registered event listeners.
          xhr.removeEventListener('error', onError);
          xhr.removeEventListener('abort', onError);
          xhr.removeEventListener('load', onLoad);
          xhr.removeEventListener('timeout', onError);

          if (req.reportProgress) {
            xhr.removeEventListener('progress', onDownProgress);

            if (reqBody !== null && xhr.upload) {
              xhr.upload.removeEventListener('progress', onUpProgress);
            }
          } // Finally, abort the in-flight request.


          if (xhr.readyState !== xhr.DONE) {
            xhr.abort();
          }
        };
      });
    }

  }

  HttpXhrBackend.ɵfac = function HttpXhrBackend_Factory(t) {
    return new (t || HttpXhrBackend)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](_angular_common__WEBPACK_IMPORTED_MODULE_0__.XhrFactory));
  };

  HttpXhrBackend.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: HttpXhrBackend,
    factory: HttpXhrBackend.ɵfac
  });
  return HttpXhrBackend;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */


const XSRF_COOKIE_NAME = /*#__PURE__*/new _angular_core__WEBPACK_IMPORTED_MODULE_1__.InjectionToken('XSRF_COOKIE_NAME');
const XSRF_HEADER_NAME = /*#__PURE__*/new _angular_core__WEBPACK_IMPORTED_MODULE_1__.InjectionToken('XSRF_HEADER_NAME');
/**
 * Retrieves the current XSRF token to use with the next outgoing request.
 *
 * @publicApi
 */

class HttpXsrfTokenExtractor {}
/**
 * `HttpXsrfTokenExtractor` which retrieves the token from a cookie.
 */


let HttpXsrfCookieExtractor = /*#__PURE__*/(() => {
  class HttpXsrfCookieExtractor {
    constructor(doc, platform, cookieName) {
      this.doc = doc;
      this.platform = platform;
      this.cookieName = cookieName;
      this.lastCookieString = '';
      this.lastToken = null;
      /**
       * @internal for testing
       */

      this.parseCount = 0;
    }

    getToken() {
      if (this.platform === 'server') {
        return null;
      }

      const cookieString = this.doc.cookie || '';

      if (cookieString !== this.lastCookieString) {
        this.parseCount++;
        this.lastToken = (0,_angular_common__WEBPACK_IMPORTED_MODULE_0__["ɵparseCookieValue"])(cookieString, this.cookieName);
        this.lastCookieString = cookieString;
      }

      return this.lastToken;
    }

  }

  HttpXsrfCookieExtractor.ɵfac = function HttpXsrfCookieExtractor_Factory(t) {
    return new (t || HttpXsrfCookieExtractor)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](_angular_common__WEBPACK_IMPORTED_MODULE_0__.DOCUMENT), _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](_angular_core__WEBPACK_IMPORTED_MODULE_1__.PLATFORM_ID), _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](XSRF_COOKIE_NAME));
  };

  HttpXsrfCookieExtractor.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: HttpXsrfCookieExtractor,
    factory: HttpXsrfCookieExtractor.ɵfac
  });
  return HttpXsrfCookieExtractor;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * `HttpInterceptor` which adds an XSRF token to eligible outgoing requests.
 */


let HttpXsrfInterceptor = /*#__PURE__*/(() => {
  class HttpXsrfInterceptor {
    constructor(tokenService, headerName) {
      this.tokenService = tokenService;
      this.headerName = headerName;
    }

    intercept(req, next) {
      const lcUrl = req.url.toLowerCase(); // Skip both non-mutating requests and absolute URLs.
      // Non-mutating requests don't require a token, and absolute URLs require special handling
      // anyway as the cookie set
      // on our origin is not the same as the token expected by another origin.

      if (req.method === 'GET' || req.method === 'HEAD' || lcUrl.startsWith('http://') || lcUrl.startsWith('https://')) {
        return next.handle(req);
      }

      const token = this.tokenService.getToken(); // Be careful not to overwrite an existing header of the same name.

      if (token !== null && !req.headers.has(this.headerName)) {
        req = req.clone({
          headers: req.headers.set(this.headerName, token)
        });
      }

      return next.handle(req);
    }

  }

  HttpXsrfInterceptor.ɵfac = function HttpXsrfInterceptor_Factory(t) {
    return new (t || HttpXsrfInterceptor)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](HttpXsrfTokenExtractor), _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](XSRF_HEADER_NAME));
  };

  HttpXsrfInterceptor.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: HttpXsrfInterceptor,
    factory: HttpXsrfInterceptor.ɵfac
  });
  return HttpXsrfInterceptor;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * An injectable `HttpHandler` that applies multiple interceptors
 * to a request before passing it to the given `HttpBackend`.
 *
 * The interceptors are loaded lazily from the injector, to allow
 * interceptors to themselves inject classes depending indirectly
 * on `HttpInterceptingHandler` itself.
 * @see `HttpInterceptor`
 */


let HttpInterceptingHandler = /*#__PURE__*/(() => {
  class HttpInterceptingHandler {
    constructor(backend, injector) {
      this.backend = backend;
      this.injector = injector;
      this.chain = null;
    }

    handle(req) {
      if (this.chain === null) {
        const interceptors = this.injector.get(HTTP_INTERCEPTORS, []);
        this.chain = interceptors.reduceRight((next, interceptor) => new HttpInterceptorHandler(next, interceptor), this.backend);
      }

      return this.chain.handle(req);
    }

  }

  HttpInterceptingHandler.ɵfac = function HttpInterceptingHandler_Factory(t) {
    return new (t || HttpInterceptingHandler)(_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](HttpBackend), _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵinject"](_angular_core__WEBPACK_IMPORTED_MODULE_1__.Injector));
  };

  HttpInterceptingHandler.ɵprov = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjectable"]({
    token: HttpInterceptingHandler,
    factory: HttpInterceptingHandler.ɵfac
  });
  return HttpInterceptingHandler;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * Constructs an `HttpHandler` that applies interceptors
 * to a request before passing it to the given `HttpBackend`.
 *
 * Use as a factory function within `HttpClientModule`.
 *
 *
 */


function interceptingHandler(backend, interceptors = []) {
  if (!interceptors) {
    return backend;
  }

  return interceptors.reduceRight((next, interceptor) => new HttpInterceptorHandler(next, interceptor), backend);
}
/**
 * Factory function that determines where to store JSONP callbacks.
 *
 * Ordinarily JSONP callbacks are stored on the `window` object, but this may not exist
 * in test environments. In that case, callbacks are stored on an anonymous object instead.
 *
 *
 */


function jsonpCallbackContext() {
  if (typeof window === 'object') {
    return window;
  }

  return {};
}
/**
 * Configures XSRF protection support for outgoing requests.
 *
 * For a server that supports a cookie-based XSRF protection system,
 * use directly to configure XSRF protection with the correct
 * cookie and header names.
 *
 * If no names are supplied, the default cookie name is `XSRF-TOKEN`
 * and the default header name is `X-XSRF-TOKEN`.
 *
 * @publicApi
 */


let HttpClientXsrfModule = /*#__PURE__*/(() => {
  class HttpClientXsrfModule {
    /**
     * Disable the default XSRF protection.
     */
    static disable() {
      return {
        ngModule: HttpClientXsrfModule,
        providers: [{
          provide: HttpXsrfInterceptor,
          useClass: NoopInterceptor
        }]
      };
    }
    /**
     * Configure XSRF protection.
     * @param options An object that can specify either or both
     * cookie name or header name.
     * - Cookie name default is `XSRF-TOKEN`.
     * - Header name default is `X-XSRF-TOKEN`.
     *
     */


    static withOptions(options = {}) {
      return {
        ngModule: HttpClientXsrfModule,
        providers: [options.cookieName ? {
          provide: XSRF_COOKIE_NAME,
          useValue: options.cookieName
        } : [], options.headerName ? {
          provide: XSRF_HEADER_NAME,
          useValue: options.headerName
        } : []]
      };
    }

  }

  HttpClientXsrfModule.ɵfac = function HttpClientXsrfModule_Factory(t) {
    return new (t || HttpClientXsrfModule)();
  };

  HttpClientXsrfModule.ɵmod = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineNgModule"]({
    type: HttpClientXsrfModule
  });
  HttpClientXsrfModule.ɵinj = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjector"]({
    providers: [HttpXsrfInterceptor, {
      provide: HTTP_INTERCEPTORS,
      useExisting: HttpXsrfInterceptor,
      multi: true
    }, {
      provide: HttpXsrfTokenExtractor,
      useClass: HttpXsrfCookieExtractor
    }, {
      provide: XSRF_COOKIE_NAME,
      useValue: 'XSRF-TOKEN'
    }, {
      provide: XSRF_HEADER_NAME,
      useValue: 'X-XSRF-TOKEN'
    }]
  });
  return HttpClientXsrfModule;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for XSRF. Automatically imported by `HttpClientModule`.
 *
 * You can add interceptors to the chain behind `HttpClient` by binding them to the
 * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
 *
 * @publicApi
 */


let HttpClientModule = /*#__PURE__*/(() => {
  class HttpClientModule {}

  HttpClientModule.ɵfac = function HttpClientModule_Factory(t) {
    return new (t || HttpClientModule)();
  };

  HttpClientModule.ɵmod = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineNgModule"]({
    type: HttpClientModule
  });
  HttpClientModule.ɵinj = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjector"]({
    providers: [HttpClient, {
      provide: HttpHandler,
      useClass: HttpInterceptingHandler
    }, HttpXhrBackend, {
      provide: HttpBackend,
      useExisting: HttpXhrBackend
    }],
    imports: [[HttpClientXsrfModule.withOptions({
      cookieName: 'XSRF-TOKEN',
      headerName: 'X-XSRF-TOKEN'
    })]]
  });
  return HttpClientModule;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();

/*#__PURE__*/
(function () {
  (typeof ngJitMode === "undefined" || ngJitMode) && _angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵsetNgModuleScope"](HttpClientModule, {
    imports: [HttpClientXsrfModule]
  });
})();
/**
 * Configures the [dependency injector](guide/glossary#injector) for `HttpClient`
 * with supporting services for JSONP.
 * Without this module, Jsonp requests reach the backend
 * with method JSONP, where they are rejected.
 *
 * You can add interceptors to the chain behind `HttpClient` by binding them to the
 * multiprovider for built-in [DI token](guide/glossary#di-token) `HTTP_INTERCEPTORS`.
 *
 * @publicApi
 */


let HttpClientJsonpModule = /*#__PURE__*/(() => {
  class HttpClientJsonpModule {}

  HttpClientJsonpModule.ɵfac = function HttpClientJsonpModule_Factory(t) {
    return new (t || HttpClientJsonpModule)();
  };

  HttpClientJsonpModule.ɵmod = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineNgModule"]({
    type: HttpClientJsonpModule
  });
  HttpClientJsonpModule.ɵinj = /*@__PURE__*/_angular_core__WEBPACK_IMPORTED_MODULE_1__["ɵɵdefineInjector"]({
    providers: [JsonpClientBackend, {
      provide: JsonpCallbackContext,
      useFactory: jsonpCallbackContext
    }, {
      provide: HTTP_INTERCEPTORS,
      useClass: JsonpInterceptor,
      multi: true
    }]
  });
  return HttpClientJsonpModule;
})();

/*#__PURE__*/
(function () {
  (typeof ngDevMode === "undefined" || ngDevMode) && void 0;
})();
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * A wrapper around the `XMLHttpRequest` constructor.
 *
 * @publicApi
 * @see `XhrFactory`
 * @deprecated
 * `XhrFactory` has moved, please import `XhrFactory` from `@angular/common` instead.
 */


const XhrFactory = _angular_common__WEBPACK_IMPORTED_MODULE_0__.XhrFactory;
/**
 * @license
 * Copyright Google LLC All Rights Reserved.
 *
 * Use of this source code is governed by an MIT-style license that can be
 * found in the LICENSE file at https://angular.io/license
 */

/**
 * Generated bundle index. Do not edit.
 */

 //# sourceMappingURL=http.js.map

/***/ }),

/***/ 4402:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {


// EXPORTS
__webpack_require__.d(__webpack_exports__, {
  "D": () => (/* binding */ from)
});

// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/Observable.js + 3 modules
var Observable = __webpack_require__(7574);
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/util/subscribeTo.js + 3 modules
var subscribeTo = __webpack_require__(7444);
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/Subscription.js + 1 modules
var Subscription = __webpack_require__(5319);
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/symbol/observable.js
var symbol_observable = __webpack_require__(6554);
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/scheduled/scheduleObservable.js



function scheduleObservable(input, scheduler) {
  return new Observable/* Observable */.y(subscriber => {
    const sub = new Subscription/* Subscription */.w();
    sub.add(scheduler.schedule(() => {
      const observable = input[symbol_observable/* observable */.L]();
      sub.add(observable.subscribe({
        next(value) {
          sub.add(scheduler.schedule(() => subscriber.next(value)));
        },

        error(err) {
          sub.add(scheduler.schedule(() => subscriber.error(err)));
        },

        complete() {
          sub.add(scheduler.schedule(() => subscriber.complete()));
        }

      }));
    }));
    return sub;
  });
} //# sourceMappingURL=scheduleObservable.js.map
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/scheduled/schedulePromise.js


function schedulePromise(input, scheduler) {
  return new Observable/* Observable */.y(subscriber => {
    const sub = new Subscription/* Subscription */.w();
    sub.add(scheduler.schedule(() => input.then(value => {
      sub.add(scheduler.schedule(() => {
        subscriber.next(value);
        sub.add(scheduler.schedule(() => subscriber.complete()));
      }));
    }, err => {
      sub.add(scheduler.schedule(() => subscriber.error(err)));
    })));
    return sub;
  });
} //# sourceMappingURL=schedulePromise.js.map
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/scheduled/scheduleArray.js
var scheduleArray = __webpack_require__(4087);
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/symbol/iterator.js
var symbol_iterator = __webpack_require__(377);
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/scheduled/scheduleIterable.js



function scheduleIterable(input, scheduler) {
  if (!input) {
    throw new Error('Iterable cannot be null');
  }

  return new Observable/* Observable */.y(subscriber => {
    const sub = new Subscription/* Subscription */.w();
    let iterator;
    sub.add(() => {
      if (iterator && typeof iterator.return === 'function') {
        iterator.return();
      }
    });
    sub.add(scheduler.schedule(() => {
      iterator = input[symbol_iterator/* iterator */.hZ]();
      sub.add(scheduler.schedule(function () {
        if (subscriber.closed) {
          return;
        }

        let value;
        let done;

        try {
          const result = iterator.next();
          value = result.value;
          done = result.done;
        } catch (err) {
          subscriber.error(err);
          return;
        }

        if (done) {
          subscriber.complete();
        } else {
          subscriber.next(value);
          this.schedule();
        }
      }));
    }));
    return sub;
  });
} //# sourceMappingURL=scheduleIterable.js.map
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/util/isInteropObservable.js

function isInteropObservable(input) {
  return input && typeof input[symbol_observable/* observable */.L] === 'function';
} //# sourceMappingURL=isInteropObservable.js.map
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/util/isPromise.js
var isPromise = __webpack_require__(4072);
// EXTERNAL MODULE: ./node_modules/rxjs/_esm2015/internal/util/isArrayLike.js
var isArrayLike = __webpack_require__(9489);
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/util/isIterable.js

function isIterable(input) {
  return input && typeof input[symbol_iterator/* iterator */.hZ] === 'function';
} //# sourceMappingURL=isIterable.js.map
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/scheduled/scheduled.js








function scheduled(input, scheduler) {
  if (input != null) {
    if (isInteropObservable(input)) {
      return scheduleObservable(input, scheduler);
    } else if ((0,isPromise/* isPromise */.t)(input)) {
      return schedulePromise(input, scheduler);
    } else if ((0,isArrayLike/* isArrayLike */.z)(input)) {
      return (0,scheduleArray/* scheduleArray */.r)(input, scheduler);
    } else if (isIterable(input) || typeof input === 'string') {
      return scheduleIterable(input, scheduler);
    }
  }

  throw new TypeError((input !== null && typeof input || input) + ' is not observable');
} //# sourceMappingURL=scheduled.js.map
;// CONCATENATED MODULE: ./node_modules/rxjs/_esm2015/internal/observable/from.js



function from(input, scheduler) {
  if (!scheduler) {
    if (input instanceof Observable/* Observable */.y) {
      return input;
    }

    return new Observable/* Observable */.y((0,subscribeTo/* subscribeTo */.s)(input));
  } else {
    return scheduled(input, scheduler);
  }
} //# sourceMappingURL=from.js.map

/***/ }),

/***/ 4612:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "b": () => (/* binding */ concatMap)
/* harmony export */ });
/* harmony import */ var _mergeMap__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(9773);

function concatMap(project, resultSelector) {
  return (0,_mergeMap__WEBPACK_IMPORTED_MODULE_0__/* .mergeMap */ .zg)(project, resultSelector, 1);
} //# sourceMappingURL=concatMap.js.map

/***/ }),

/***/ 5435:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "h": () => (/* binding */ filter)
/* harmony export */ });
/* harmony import */ var _Subscriber__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(7393);

function filter(predicate, thisArg) {
  return function filterOperatorFunction(source) {
    return source.lift(new FilterOperator(predicate, thisArg));
  };
}

class FilterOperator {
  constructor(predicate, thisArg) {
    this.predicate = predicate;
    this.thisArg = thisArg;
  }

  call(subscriber, source) {
    return source.subscribe(new FilterSubscriber(subscriber, this.predicate, this.thisArg));
  }

}

class FilterSubscriber extends _Subscriber__WEBPACK_IMPORTED_MODULE_0__/* .Subscriber */ .L {
  constructor(destination, predicate, thisArg) {
    super(destination);
    this.predicate = predicate;
    this.thisArg = thisArg;
    this.count = 0;
  }

  _next(value) {
    let result;

    try {
      result = this.predicate.call(this.thisArg, value, this.count++);
    } catch (err) {
      this.destination.error(err);
      return;
    }

    if (result) {
      this.destination.next(value);
    }
  }

} //# sourceMappingURL=filter.js.map

/***/ }),

/***/ 9773:
/***/ ((__unused_webpack_module, __webpack_exports__, __webpack_require__) => {

/* harmony export */ __webpack_require__.d(__webpack_exports__, {
/* harmony export */   "zg": () => (/* binding */ mergeMap)
/* harmony export */ });
/* unused harmony exports MergeMapOperator, MergeMapSubscriber, flatMap */
/* harmony import */ var _map__WEBPACK_IMPORTED_MODULE_1__ = __webpack_require__(8002);
/* harmony import */ var _observable_from__WEBPACK_IMPORTED_MODULE_0__ = __webpack_require__(4402);
/* harmony import */ var _innerSubscribe__WEBPACK_IMPORTED_MODULE_2__ = __webpack_require__(5345);



function mergeMap(project, resultSelector, concurrent = Number.POSITIVE_INFINITY) {
  if (typeof resultSelector === 'function') {
    return source => source.pipe(mergeMap((a, i) => (0,_observable_from__WEBPACK_IMPORTED_MODULE_0__/* .from */ .D)(project(a, i)).pipe((0,_map__WEBPACK_IMPORTED_MODULE_1__/* .map */ .U)((b, ii) => resultSelector(a, b, i, ii))), concurrent));
  } else if (typeof resultSelector === 'number') {
    concurrent = resultSelector;
  }

  return source => source.lift(new MergeMapOperator(project, concurrent));
}
class MergeMapOperator {
  constructor(project, concurrent = Number.POSITIVE_INFINITY) {
    this.project = project;
    this.concurrent = concurrent;
  }

  call(observer, source) {
    return source.subscribe(new MergeMapSubscriber(observer, this.project, this.concurrent));
  }

}
class MergeMapSubscriber extends _innerSubscribe__WEBPACK_IMPORTED_MODULE_2__/* .SimpleOuterSubscriber */ .Ds {
  constructor(destination, project, concurrent = Number.POSITIVE_INFINITY) {
    super(destination);
    this.project = project;
    this.concurrent = concurrent;
    this.hasCompleted = false;
    this.buffer = [];
    this.active = 0;
    this.index = 0;
  }

  _next(value) {
    if (this.active < this.concurrent) {
      this._tryNext(value);
    } else {
      this.buffer.push(value);
    }
  }

  _tryNext(value) {
    let result;
    const index = this.index++;

    try {
      result = this.project(value, index);
    } catch (err) {
      this.destination.error(err);
      return;
    }

    this.active++;

    this._innerSub(result);
  }

  _innerSub(ish) {
    const innerSubscriber = new _innerSubscribe__WEBPACK_IMPORTED_MODULE_2__/* .SimpleInnerSubscriber */ .IY(this);
    const destination = this.destination;
    destination.add(innerSubscriber);
    const innerSubscription = (0,_innerSubscribe__WEBPACK_IMPORTED_MODULE_2__/* .innerSubscribe */ .ft)(ish, innerSubscriber);

    if (innerSubscription !== innerSubscriber) {
      destination.add(innerSubscription);
    }
  }

  _complete() {
    this.hasCompleted = true;

    if (this.active === 0 && this.buffer.length === 0) {
      this.destination.complete();
    }

    this.unsubscribe();
  }

  notifyNext(innerValue) {
    this.destination.next(innerValue);
  }

  notifyComplete() {
    const buffer = this.buffer;
    this.active--;

    if (buffer.length > 0) {
      this._next(buffer.shift());
    } else if (this.active === 0 && this.hasCompleted) {
      this.destination.complete();
    }
  }

}
const flatMap = (/* unused pure expression or super */ null && (mergeMap)); //# sourceMappingURL=mergeMap.js.map

/***/ })

}]);