Update LICENSE, README.md, and 13 more files...

src/BackgroundTask.tsx

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+import { Component, ReactNode, createElement } from "react";
+import { View } from "react-native";
+import BackgroundFetch from "react-native-background-fetch";
+
+import { Style } from "@mendix/pluggable-widgets-tools";
+
+import { BackgroundTaskProps } from "../typings/BackgroundTaskProps";
+
+export interface CustomStyle extends Style {
+}
+
+export class BackgroundTask extends Component<BackgroundTaskProps<CustomStyle>> {
+    constructor(props: BackgroundTaskProps<CustomStyle>){
+        super(props)
+    }
+
+    render(): ReactNode {
+      return (
+          //Render an empty view so widget can be used in Mendix modeler.
+            <View></View>
+        );
+    }
+
+    componentDidMount() {
+      // Initialize BackgroundFetch ONLY ONCE when component mounts.
+      this.initBackgroundFetch();
+    }
+  
+    async initBackgroundFetch() {
+      console.log('Configuring BackgroundFetch')
+      // BackgroundFetch event handler.
+      const onEvent = async (taskId: string | undefined) => {
+        console.log('[BackgroundFetch] task: ', taskId);
+          // Execute nanoflow
+          this.props.backgroundFlow?.execute();
+          // IMPORTANT:  You must signal to the OS that your task is complete.
+          BackgroundFetch.finish(taskId)
+      }
+
+      // Timeout callback is executed when your Task has exceeded its allowed running-time.
+      // You must stop what you're doing immediately BackgorundFetch.finish(taskId) or else fetch will never be executed again by OS.
+      const onTimeout = async (taskId: any) => {
+          console.warn('[BackgroundFetch] TIMEOUT task: ', taskId);
+          BackgroundFetch.finish(taskId)
+      }
+
+      // Initialize BackgroundFetch only once when component mounts.
+      await BackgroundFetch.configure(
+        {
+          minimumFetchInterval: 30, //Minimum interval time for schedule. Can be (much) longer.
+          enableHeadless: true, //HeadlessJS mode for Android only
+          startOnBoot: true, //Start when device starts, Android only
+          stopOnTerminate: false //Stop task when app is killed, Android only
+        },
+          onEvent,
+          onTimeout,
+      )
+  }
+  
+}

src/BackgroundTask.xml

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+<?xml version="1.0" encoding="utf-8"?>
+<widget id="incentro.backgroundtask.BackgroundTask" pluginWidget="true" needsEntityContext="true" offlineCapable="true"
+        supportedPlatform="Native"
+        xmlns="http://www.mendix.com/widget/1.0/" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+        xsi:schemaLocation="http://www.mendix.com/widget/1.0/ ../node_modules/mendix/custom_widget.xsd">
+    <name>Background Task</name>
+    <description>Call a nanoflow when app is in background using the BackgroundFetch API on Android and iOS</description>
+    <icon/>
+    <properties>
+        <propertyGroup caption="Background Task">
+            <property key="backgroundFlow" type="action" required="false">
+                <caption>Backgroundtask</caption>
+                <description>Action to perform in the background (only nanoflow is allowed, no opening pages etc.)</description>
+            </property>
+        </propertyGroup>
+    </properties>
+</widget>

src/package.xml

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+<?xml version="1.0" encoding="utf-8" ?>
+<package xmlns="http://www.mendix.com/package/1.0/">
+    <clientModule name="BackgroundTask" version="1.0.0" xmlns="http://www.mendix.com/clientModule/1.0/">
+        <widgetFiles>
+            <widgetFile path="BackgroundTask.xml"/>
+        </widgetFiles>
+        <files>
+            <file path="incentro/backgroundtask"/>
+        </files>
+    </clientModule>
+</package>