/**
 * @fileoverview added by tsickle
 * @suppress {checkTypes,extraRequire,missingReturn,unusedPrivateMembers,uselessCode} checked by tsc
 */
/**
 * @license
 * Copyright Google Inc. 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
 */
import { Injectable } from '@angular/core';
import { Observable } from 'rxjs';
import { ResponseOptions } from '../base_response_options';
import { ReadyState, RequestMethod, ResponseType } from '../enums';
import { ConnectionBackend } from '../interfaces';
import { Response } from '../static_response';
import { BrowserJsonp } from './browser_jsonp';
/** @type {?} */
const JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.';
/** @type {?} */
const JSONP_ERR_WRONG_METHOD = 'JSONP requests must use GET request method.';
/**
 * Base class for an in-flight JSONP request.
 *
 * @deprecated see https://angular.io/guide/http
 * \@publicApi
 */
export class JSONPConnection {
    /**
     * \@internal
     * @param {?} req
     * @param {?} _dom
     * @param {?=} baseResponseOptions
     */
    constructor(req, _dom, baseResponseOptions) {
        this._dom = _dom;
        this.baseResponseOptions = baseResponseOptions;
        this._finished = false;
        if (req.method !== RequestMethod.Get) {
            throw new TypeError(JSONP_ERR_WRONG_METHOD);
        }
        this.request = req;
        this.response = new Observable((responseObserver) => {
            this.readyState = ReadyState.Loading;
            /** @type {?} */
            const id = this._id = _dom.nextRequestID();
            _dom.exposeConnection(id, this);
            // Workaround Dart
            // url = url.replace(/=JSONP_CALLBACK(&|$)/, `generated method`);
            /** @type {?} */
            const callback = _dom.requestCallback(this._id);
            /** @type {?} */
            let url = req.url;
            if (url.indexOf('=JSONP_CALLBACK&') > -1) {
                url = url.replace('=JSONP_CALLBACK&', `=${callback}&`);
            }
            else if (url.lastIndexOf('=JSONP_CALLBACK') === url.length - '=JSONP_CALLBACK'.length) {
                url = url.substring(0, url.length - '=JSONP_CALLBACK'.length) + `=${callback}`;
            }
            /** @type {?} */
            const script = this._script = _dom.build(url);
            /** @type {?} */
            const onLoad = (event) => {
                if (this.readyState === ReadyState.Cancelled)
                    return;
                this.readyState = ReadyState.Done;
                _dom.cleanup(script);
                if (!this._finished) {
                    /** @type {?} */
                    let responseOptions = new ResponseOptions({ body: JSONP_ERR_NO_CALLBACK, type: ResponseType.Error, url });
                    if (baseResponseOptions) {
                        responseOptions = baseResponseOptions.merge(responseOptions);
                    }
                    responseObserver.error(new Response(responseOptions));
                    return;
                }
                /** @type {?} */
                let responseOptions = new ResponseOptions({ body: this._responseData, url });
                if (this.baseResponseOptions) {
                    responseOptions = this.baseResponseOptions.merge(responseOptions);
                }
                responseObserver.next(new Response(responseOptions));
                responseObserver.complete();
            };
            /** @type {?} */
            const onError = (error) => {
                if (this.readyState === ReadyState.Cancelled)
                    return;
                this.readyState = ReadyState.Done;
                _dom.cleanup(script);
                /** @type {?} */
                let responseOptions = new ResponseOptions({ body: error.message, type: ResponseType.Error });
                if (baseResponseOptions) {
                    responseOptions = baseResponseOptions.merge(responseOptions);
                }
                responseObserver.error(new Response(responseOptions));
            };
            script.addEventListener('load', onLoad);
            script.addEventListener('error', onError);
            _dom.send(script);
            return () => {
                this.readyState = ReadyState.Cancelled;
                script.removeEventListener('load', onLoad);
                script.removeEventListener('error', onError);
                this._dom.cleanup(script);
            };
        });
    }
    /**
     * Callback called when the JSONP request completes, to notify the application
     * of the new data.
     * @param {?=} data
     * @return {?}
     */
    finished(data) {
        // Don't leak connections
        this._finished = true;
        this._dom.removeConnection(this._id);
        if (this.readyState === ReadyState.Cancelled)
            return;
        this._responseData = data;
    }
}
if (false) {
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype._id;
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype._script;
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype._responseData;
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype._finished;
    /**
     * The {\@link ReadyState} of this request.
     * @type {?}
     */
    JSONPConnection.prototype.readyState;
    /**
     * The outgoing HTTP request.
     * @type {?}
     */
    JSONPConnection.prototype.request;
    /**
     * An observable that completes with the response, when the request is finished.
     * @type {?}
     */
    JSONPConnection.prototype.response;
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype._dom;
    /**
     * @type {?}
     * @private
     */
    JSONPConnection.prototype.baseResponseOptions;
}
/**
 * A {\@link ConnectionBackend} that uses the JSONP strategy of making requests.
 *
 * @deprecated see https://angular.io/guide/http
 * \@publicApi
 */
export class JSONPBackend extends ConnectionBackend {
    /**
     * \@internal
     * @param {?} _browserJSONP
     * @param {?} _baseResponseOptions
     */
    constructor(_browserJSONP, _baseResponseOptions) {
        super();
        this._browserJSONP = _browserJSONP;
        this._baseResponseOptions = _baseResponseOptions;
    }
    /**
     * @param {?} request
     * @return {?}
     */
    createConnection(request) {
        return new JSONPConnection(request, this._browserJSONP, this._baseResponseOptions);
    }
}
JSONPBackend.decorators = [
    { type: Injectable }
];
/** @nocollapse */
JSONPBackend.ctorParameters = () => [
    { type: BrowserJsonp },
    { type: ResponseOptions }
];
if (false) {
    /**
     * @type {?}
     * @private
     */
    JSONPBackend.prototype._browserJSONP;
    /**
     * @type {?}
     * @private
     */
    JSONPBackend.prototype._baseResponseOptions;
}
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All Rights Reserved.\n *\n * Use of this source code is governed by an MIT-style license that can be\n * found in the LICENSE file at https://angular.io/license\n */\n\nimport {Injectable} from '@angular/core';\nimport {Observable, Observer} from 'rxjs';\n\nimport {ResponseOptions} from '../base_response_options';\nimport {ReadyState, RequestMethod, ResponseType} from '../enums';\nimport {Connection, ConnectionBackend} from '../interfaces';\nimport {Request} from '../static_request';\nimport {Response} from '../static_response';\n\nimport {BrowserJsonp} from './browser_jsonp';\n\nconst JSONP_ERR_NO_CALLBACK = 'JSONP injected script did not invoke callback.';\nconst JSONP_ERR_WRONG_METHOD = 'JSONP requests must use GET request method.';\n\n/**\n * Base class for an in-flight JSONP request.\n *\n * @deprecated see https://angular.io/guide/http\n * @publicApi\n */\nexport class JSONPConnection implements Connection {\n  // TODO(issue/24571): remove '!'.\n  private _id !: string;\n  // TODO(issue/24571): remove '!'.\n  private _script !: Element;\n  private _responseData: any;\n  private _finished: boolean = false;\n\n  /**\n   * The {@link ReadyState} of this request.\n   */\n  // TODO(issue/24571): remove '!'.\n  readyState !: ReadyState;\n\n  /**\n   * The outgoing HTTP request.\n   */\n  request: Request;\n\n  /**\n   * An observable that completes with the response, when the request is finished.\n   */\n  response: Observable<Response>;\n\n  /** @internal */\n  constructor(\n      req: Request, private _dom: BrowserJsonp, private baseResponseOptions?: ResponseOptions) {\n    if (req.method !== RequestMethod.Get) {\n      throw new TypeError(JSONP_ERR_WRONG_METHOD);\n    }\n    this.request = req;\n    this.response = new Observable<Response>((responseObserver: Observer<Response>) => {\n\n      this.readyState = ReadyState.Loading;\n      const id = this._id = _dom.nextRequestID();\n\n      _dom.exposeConnection(id, this);\n\n      // Workaround Dart\n      // url = url.replace(/=JSONP_CALLBACK(&|$)/, `generated method`);\n      const callback = _dom.requestCallback(this._id);\n      let url: string = req.url;\n      if (url.indexOf('=JSONP_CALLBACK&') > -1) {\n        url = url.replace('=JSONP_CALLBACK&', `=${callback}&`);\n      } else if (url.lastIndexOf('=JSONP_CALLBACK') === url.length - '=JSONP_CALLBACK'.length) {\n        url = url.substring(0, url.length - '=JSONP_CALLBACK'.length) + `=${callback}`;\n      }\n\n      const script = this._script = _dom.build(url);\n\n      const onLoad = (event: Event) => {\n        if (this.readyState === ReadyState.Cancelled) return;\n        this.readyState = ReadyState.Done;\n        _dom.cleanup(script);\n        if (!this._finished) {\n          let responseOptions =\n              new ResponseOptions({body: JSONP_ERR_NO_CALLBACK, type: ResponseType.Error, url});\n          if (baseResponseOptions) {\n            responseOptions = baseResponseOptions.merge(responseOptions);\n          }\n          responseObserver.error(new Response(responseOptions));\n          return;\n        }\n\n        let responseOptions = new ResponseOptions({body: this._responseData, url});\n        if (this.baseResponseOptions) {\n          responseOptions = this.baseResponseOptions.merge(responseOptions);\n        }\n\n        responseObserver.next(new Response(responseOptions));\n        responseObserver.complete();\n      };\n\n      const onError = (error: Error) => {\n        if (this.readyState === ReadyState.Cancelled) return;\n        this.readyState = ReadyState.Done;\n        _dom.cleanup(script);\n        let responseOptions = new ResponseOptions({body: error.message, type: ResponseType.Error});\n        if (baseResponseOptions) {\n          responseOptions = baseResponseOptions.merge(responseOptions);\n        }\n        responseObserver.error(new Response(responseOptions));\n      };\n\n      script.addEventListener('load', onLoad);\n      script.addEventListener('error', onError);\n\n      _dom.send(script);\n\n      return () => {\n        this.readyState = ReadyState.Cancelled;\n        script.removeEventListener('load', onLoad);\n        script.removeEventListener('error', onError);\n        this._dom.cleanup(script);\n      };\n    });\n  }\n\n  /**\n   * Callback called when the JSONP request completes, to notify the application\n   * of the new data.\n   */\n  finished(data?: any) {\n    // Don't leak connections\n    this._finished = true;\n    this._dom.removeConnection(this._id);\n    if (this.readyState === ReadyState.Cancelled) return;\n    this._responseData = data;\n  }\n}\n\n/**\n * A {@link ConnectionBackend} that uses the JSONP strategy of making requests.\n *\n * @deprecated see https://angular.io/guide/http\n * @publicApi\n */\n@Injectable()\nexport class JSONPBackend extends ConnectionBackend {\n  /** @internal */\n  constructor(private _browserJSONP: BrowserJsonp, private _baseResponseOptions: ResponseOptions) {\n    super();\n  }\n\n  createConnection(request: Request): JSONPConnection {\n    return new JSONPConnection(request, this._browserJSONP, this._baseResponseOptions);\n  }\n}\n"]}