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  /// Create an AtClient (AtClientImpl) to communicate with the person's
  /// secondary server
  Future<bool> onboard({String atsign}) async {
    atClientImpl = null;
    atClientService = AtClientService();
    Directory downloadDirectory;

    /// The directory where keys will be stored
    if (Platform.isIOS) {
      downloadDirectory =

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import 'dart:io';

import 'package:at_client_mobile/at_client_mobile.dart';
import 'package:at_commons/at_commons.dart';
import 'package:at_list/app/at_constants.dart';
import 'package:at_list/app/router.gr.dart';
import 'package:auto_route/auto_route.dart';
import 'package:flutter/cupertino.dart';
import 'package:injectable/injectable.dart';
import 'package:path_provider/path_provider.dart' as path_provider;

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import 'package:image/image.dart';
import 'package:tflite_flutter/tflite_flutter.dart';
import 'package:tflite_flutter_helper/src/image/tensor_image.dart';
import 'package:tflite_flutter_helper/src/tensorbuffer/tensorbuffer.dart';
import 'dart:typed_data';

/// Implements some stateless image conversion methods.
///
/// This class is an internal helper.
class ImageConversion {

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class VideoTimeElapsed extends ViewModelWidget<StackedVideoViewModel> {
  @override
  Widget build(BuildContext context, StackedVideoViewModel model) {
    return Container(
      padding: EdgeInsets.only(bottom: 8, left: 8),
      height: model.thumbnailHeight,
      width: model.thumbnailWidth,
      child: Align(
        alignment: Alignment.bottomLeft,
        child: Container(

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class VideoTimeRemaining extends ViewModelWidget<StackedVideoViewModel> {
  @override
  Widget build(BuildContext context, StackedVideoViewModel model) {
    return Container(
      padding: EdgeInsets.only(bottom: 8, right: 8),
      height: model.thumbnailHeight,
      width: model.thumbnailWidth,
      child: Align(
        alignment: Alignment.bottomRight,
        child: Container(

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/// (1) Use the WidgetsBindingObserver to get the VideoThumbnail's size
/// after it is laid out
class VideoThumbnail extends ViewModelWidget<StackedVideoViewModel> with WidgetsBindingObserver{

  @override
  Widget build(BuildContext context, StackedVideoViewModel model) {

    /// (3) Get the size of the widget after it is rendered on screen
    WidgetsBinding.instance
        .addPostFrameCallback((_) {

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class StackedVideoViewModel extends BaseViewModel {

  // Input Properties
  VideoPlayerController videoPlayerController;
  bool showFull;
  double x; // X alignment of FittedBox
  double y; // Y alignment of FittedBox

  // Local Properties
  bool gotThumbnailSize = false;

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class VideoControlOverlay extends ViewModelWidget<StackedVideoViewModel> {
  @override
  Widget build(BuildContext context, StackedVideoViewModel model) {
    return Container(
      height: model.thumbnailHeight,
      width: model.thumbnailWidth,
      child: Stack(
        children: <Widget>[
          AnimatedSwitcher(
            duration: Duration(milliseconds: 50),

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class VideoThumbnail extends ViewModelWidget<StackedVideoViewModel> {

  @override
  Widget build(BuildContext context, StackedVideoViewModel model) {
    return Builder(
      builder: (context) {
        // If we want to show the full video, we need to scale it to fit the longest side
        if (model.showFull) {
          bool wideVideo =
              model.videoPlayerController.value.size.width >

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class StackedVideoView extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ViewModelBuilder<StackedVideoViewModel>.reactive(
      viewModelBuilder: () => StackedVideoViewModel(),
      onModelReady: (model) {
        model.initialize(
            'https://www.learningcontainer.com/wp-content/uploads/2020/05/sample-mp4-file.mp4');
      },
      builder: (context, model, child) {