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api.service.ts
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/
api.service.ts
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/**
* @license
* Copyright 2017 JBoss Inc
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
import { RequestOptions, Response } from "@angular/http";
import { AppSettingsService } from "@core/app-settings.service";
import { LoggerService } from "@core/logger.service";
import "rxjs/add/observable/throw";
import "rxjs/add/operator/catch";
import "rxjs/add/operator/map";
import { Observable } from "rxjs/Observable";
import { ErrorObservable } from "rxjs/observable/ErrorObservable";
import * as X2JS from 'x2js';
export abstract class ApiService {
protected appSettings: AppSettingsService;
protected logger: LoggerService;
protected constructor( appSettings: AppSettingsService, logger: LoggerService) {
this.appSettings = appSettings;
this.logger = logger;
}
/**
* @returns the base url of the application
*/
protected getBaseUrl(): string {
return window.location.protocol + "://" + window.location.hostname;
}
/**
* Get the Auth RequestOptions if any
* Note: Since usage of the oauth-proxy no additional auth request options are necessary
*
* @returns {RequestOptions}
*/
protected getAuthRequestOptions(): RequestOptions {
return this.appSettings.getAuthRequestOptions();
}
/**
* Get the current user workspace path
* @returns {string} the current user workspace path
*/
protected getKomodoUserWorkspacePath(): string {
return this.appSettings.getKomodoUserWorkspacePath();
}
protected isXML(xml: string): boolean {
try {
const parser = new X2JS();
const xmlDoc = parser.xml2js(xml); //is valid XML
return xmlDoc != null;
} catch (err) {
// was not XML
return false;
}
}
protected tryXMLParse(xml: string): any {
try {
const parser = new X2JS();
const xmlDoc = parser.xml2js(xml); //is valid XML
return xmlDoc;
} catch (err) {}
return null;
}
protected tryNumberParse(jsonString: string): number {
try {
var n = parseInt(jsonString);
if (n && typeof n === "number") {
return n;
}
} catch (e) {}
return null;
}
/**
* Try to parse the given string and if parseable
* then return the object
*/
protected tryJsonParse (jsonString: string): any {
try {
var o = JSON.parse(jsonString);
// Handle non-exception-throwing cases:
// Neither JSON.parse(false) or JSON.parse(1234) throw errors, hence the type-checking,
// but... JSON.parse(null) returns null, and typeof null === "object",
// so we must check for that, too. Thankfully, null is falsey, so this suffices:
if (o && typeof o === "object") {
return o;
}
} catch (e) {}
return null;
}
/**
* @returns true if the item is parseable
*/
protected isJSON(item: string): boolean {
item = typeof item !== "string" ? JSON.stringify(item) : item;
try {
item = JSON.parse(item);
} catch (e) {
return false;
}
if (typeof item === "object" && item !== null) {
return true;
}
return false;
}
protected msgFromResponse(response: Response): string {
let msg = "";
if (! this.isJSON(response.text())) {
msg = response.text();
} else {
const body = response.json();
if (body.message) {
msg = body.message;
} else if (body.error) {
msg = body.error;
} else if (body.Information && body.Information.ErrorMessage1) {
msg = body.Information.ErrorMessage1;
}
}
if (msg.length === 0 ) {
return "unknown error";
}
return msg;
}
protected handleError(error: Response): ErrorObservable {
this.logger.error( this.constructor.name + "::handleError => " + this.msgFromResponse(error));
return Observable.throw(error);
}
}