update

ts/index.ts

@@ -1,24 +1,56 @@
 import * as plugins from './webdetector.plugins';
 
+import {throttleTime } from 'rxjs/operators';
+
+export interface IWebDetectorOptions {
+  checkOnlineUrl: string;
+}
+
 export class WebDetector {
-  
+  options: IWebDetectorOptions;
+  private onlineObservableIntake = new plugins.smartrx.ObservableIntake();
+  onlineObservable = this.onlineObservableIntake.observable.pipe(throttleTime(10000));
+  latestState: 'online' | 'offline' = 'online';
+
+  constructor(optionsArg: IWebDetectorOptions) {
+    this.options = optionsArg;
+  }
+
   /**
    * 
    */
   async isOnline() {
-    const navigatorOnline = window.navigator.onLine
-    let reachesGoogle: boolean = false;
-    if (navigatorOnline) {
-      const controller = new AbortController();
-      const fetchPromise = fetch('https://google.com', { signal: controller.signal });
-      const timeout = setTimeout(() => {
-        controller.abort();
-      }, 5000);
+    let reachesInternet: boolean = false;
+    const controller = new AbortController();
+    const fetchPromise = fetch(this.options.checkOnlineUrl, { signal: controller.signal });
+    const timeout = setTimeout(() => {
+      controller.abort();
+    }, 1000);
 
-      await fetchPromise.then(async response => {
-        reachesGoogle = true
-      });
+    await fetchPromise.then(async response => {
+        reachesInternet = true
+    }).catch(err => {
+      // console.log(`request to ${this.options.checkOnlineUrl} failed}`)
+    });
+    const latestLocalState = (() => {
+      if(reachesInternet) {
+        return 'online'
+      } else {
+        return 'offline'
+      }
+    })();
+    if(latestLocalState !== this.latestState) {
+      
+      this.onlineObservableIntake.push(this.latestState);
+    }
+    this.latestState = latestLocalState;
+    return reachesInternet;
+  }
+
+  async startPeriodicChecks() {
+    while (true) {
+      await this.isOnline();
+      await plugins.smartdelay.delayFor(3000);
     }
-    return reachesGoogle;
   }
 }

ts/webdetector.plugins.ts

@@ -1,4 +1,7 @@
-const removeme = {};
+import * as smartdelay from '@pushrocks/smartdelay';
+import * as smartrx from '@pushrocks/smartrx';
+
 export {
-  removeme
+  smartdelay,
+  smartrx
 }