93 lines
2.5 KiB
TypeScript
93 lines
2.5 KiB
TypeScript
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// (C) Copyright 2015 Moodle Pty Ltd.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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import { Injectable } from '@angular/core';
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import { CorePlatform } from '@services/platform';
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import { makeSingleton, Network } from '@singletons';
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/**
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* Service to manage network information.
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*/
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@Injectable({ providedIn: 'root' })
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export class CoreNetworkService {
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protected forceOffline = false;
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/**
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* Set value of forceOffline flag. If true, the app will think the device is offline.
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*
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* @param value Value to set.
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*/
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setForceOffline(value: boolean): void {
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this.forceOffline = !!value;
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}
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/**
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* Returns whether we are online.
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*
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* @return Whether the app is online.
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*/
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isOnline(): boolean {
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if (this.forceOffline) {
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return false;
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}
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if (!CorePlatform.isMobile()) {
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return navigator.onLine;
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}
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let online = Network.type !== null && Network.type != Network.Connection.NONE &&
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Network.type != Network.Connection.UNKNOWN;
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// Double check we are not online because we cannot rely 100% in Cordova APIs.
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if (!online && navigator.onLine) {
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online = true;
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}
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return online;
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}
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/**
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* Check if device uses a limited connection.
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*
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* @return Whether the device uses a limited connection.
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*/
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isNetworkAccessLimited(): boolean {
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if (!CorePlatform.isMobile()) {
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return false;
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}
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const limited = [
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Network.Connection.CELL_2G,
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Network.Connection.CELL_3G,
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Network.Connection.CELL_4G,
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Network.Connection.CELL,
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];
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return limited.indexOf(Network.type) > -1;
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}
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/**
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* Check if device uses a wifi connection.
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*
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* @return Whether the device uses a wifi connection.
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*/
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isWifi(): boolean {
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return this.isOnline() && !this.isNetworkAccessLimited();
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}
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}
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export const CoreNetwork = makeSingleton(CoreNetworkService);
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