prs/prs.mobile.new/PRS.Mobile/Components/DigitalForms/Editor/CustomUserControls/EmbeddedImageCapture.cs

using System;
using System.IO;
using InABox.Core;
using InABox.Mobile;
using Xamarin.CommunityToolkit.UI.Views;
using Xamarin.Essentials;
using Xamarin.Forms;
using XF.Material.Forms.UI.Dialogs;

namespace PRS.Mobile
{
    class EmbeddedImageCapture : Grid
    {
        public MobileButton CameraButton = new MobileButton();
        public MobileButton LibraryButton = new MobileButton();
        public Label CameraLabel = new Label();
        public Label LibraryLabel = new Label();
        public Document Document;
        public Image Image { get; set; }
        bool firstLoad;
        bool disableLibrary;
        bool isVideo;
        public byte[] bytes;
        public TimeSpan VideoLength { get; set; }
        public EmbeddedImageCapture(bool disablelibrary = false, bool isvideo = false)
        {
            VerticalOptions = LayoutOptions.Center;
            firstLoad = true;
            Document = new Document();
            Image = new Image();
            disableLibrary = disablelibrary;
            isVideo = isvideo;
            AddColumnsAndRows();
            AddButtons();
        }

        private void AddColumnsAndRows()
        {
            Padding = new Thickness(10);
            ColumnSpacing = 0;
            RowSpacing = 0;
            ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Star) });
            RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) });
            RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) });
        }

        private void AddButtons()
        {
            if (firstLoad)
            {

                CameraButton.Clicked += CameraButton_Clicked;
                CameraButton.Image = "camera";
                CameraButton.ImageSize = new Size(50, 50);
                CameraButton.Margin = 5;
                CameraButton.Padding = 2;
                SetColumn(CameraButton, 0);
                SetRow(CameraButton, 0);
                CameraButton.BackgroundColor = Color.FromHex("#15C7C1");
                CameraButton.HeightRequest = 70;
                CameraButton.WidthRequest = 70;
                CameraButton.HorizontalOptions = LayoutOptions.Center;
                CameraButton.VerticalOptions = LayoutOptions.Center;
                Children.Add(CameraButton);
                
                CameraLabel.Text = isVideo ? "Take Video" : "Camera";
                SetRow(CameraLabel, 1);
                SetColumn(CameraLabel, 0);
                CameraLabel.HorizontalOptions = LayoutOptions.Center;
                CameraLabel.HorizontalTextAlignment = TextAlignment.Center;
                CameraLabel.FontAttributes = FontAttributes.Bold;
                CameraLabel.FontSize = Device.GetNamedSize(NamedSize.Small, CameraLabel);
                CameraLabel.TextColor = Color.Black;
                Children.Add(CameraLabel);
                
                LibraryButton.Clicked += LibraryButton_Clicked;
                LibraryButton.Image = "gallery";
                LibraryButton.Margin = 5;
                LibraryButton.Padding = 2;
                SetRow(LibraryButton, 0);
                SetColumn(LibraryButton, 1);
                LibraryButton.BackgroundColor = Color.FromHex("#15C7C1");
                LibraryButton.HeightRequest = 70;
                LibraryButton.WidthRequest = 70;
                LibraryButton.HorizontalOptions = LayoutOptions.Center;
                LibraryButton.VerticalOptions = LayoutOptions.Center;
                LibraryButton.IsEnabled = !disableLibrary;
                Children.Add(LibraryButton);
                
                LibraryLabel.Text = "Library";
                SetRow(LibraryLabel, 1);
                SetColumn(LibraryLabel, 1);
                LibraryLabel.HorizontalOptions = LayoutOptions.Center;
                LibraryLabel.HorizontalTextAlignment = TextAlignment.Center;
                LibraryLabel.FontAttributes = FontAttributes.Bold;
                LibraryLabel.FontSize = Device.GetNamedSize(NamedSize.Small, LibraryLabel);
                LibraryLabel.TextColor = disableLibrary
                    ? Color.Gray
                    : Color.Black;
                Children.Add(LibraryLabel);
                
            }
            
            firstLoad = false;
        }

        private void CameraButton_Clicked(object sender, EventArgs e)
        {
            if (isVideo)
                OpenVideoCamera();
            else
                OpenCamera();

        }

        private void LibraryButton_Clicked(object sender, EventArgs e)
        {
            if (isVideo)
                OpenVideoLibrary();
            else
                OpenLibrary();
        }

        private async void OpenVideoLibrary()
        {
            
            try
            {
                var file = await MediaPicker.PickVideoAsync();
                if (file != null)
                    AddVideo(file);
            }
            catch (FeatureNotSupportedException fnsEx)
            {
                await MaterialDialog.Instance.AlertAsync("Feature Not Supported!");
            }
            catch (PermissionException pEx)
            {
                await MaterialDialog.Instance.AlertAsync("Permission Not Granted!");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
            }
            
            // try
            // {
            //     await CrossMedia.Current.Initialize();
            //
            //     if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakeVideoSupported)
            //     {
            //         return;
            //     }
            //
            //     var file = await CrossMedia.Current.PickVideoAsync();
            //
            //     if (file == null)
            //         return;
            //
            //     AddVideo(file);
            // }
            // catch { }
        }

        private async void OpenVideoCamera()
        {
            
            try
            {
                var file = await MediaPicker.CaptureVideoAsync();
                if (file != null)
                    AddVideo(file);
            }
            catch (FeatureNotSupportedException fnsEx)
            {
                await MaterialDialog.Instance.AlertAsync("Feature Not Supported!");
            }
            catch (PermissionException pEx)
            {
                await MaterialDialog.Instance.AlertAsync("Permission Not Granted!");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
            }
            // try
            // {
            //     await CrossMedia.Current.Initialize();
            //
            //     if (CrossMedia.Current.IsCameraAvailable && CrossMedia.Current.IsTakeVideoSupported)
            //     {
            //         var file = await CrossMedia.Current.TakeVideoAsync(new Plugin.Media.Abstractions.StoreVideoOptions()
            //         {
            //             CompressionQuality = 15,
            //             PhotoSize = Plugin.Media.Abstractions.PhotoSize.MaxWidthHeight,
            //             Quality = VideoQuality,
            //             DesiredLength = new TimeSpan(0, 0, 20),
            //             RotateImage = false
            //         });
            //
            //         if (file == null)
            //             return;
            //
            //         AddVideo(file);
            //     }
            // }
            // catch
            // {
            //     return;
            // }
        }


        private async void OpenLibrary()
        {
            try
            {
                var file = await MediaPicker.PickPhotoAsync();
                if (file != null)
                    AddPhoto(file);
            }
            catch (FeatureNotSupportedException fnsEx)
            {
                await MaterialDialog.Instance.AlertAsync("Feature Not Supported!");
            }
            catch (PermissionException pEx)
            {
                await MaterialDialog.Instance.AlertAsync("Permission Not Granted!");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
            }
            
            // try
            // {
            //     await CrossMedia.Current.Initialize();
            //
            //     if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
            //     {
            //         return;
            //     }
            //
            //     var file = await CrossMedia.Current.PickPhotoAsync(new Plugin.Media.Abstractions.PickMediaOptions()
            //     {
            //         CompressionQuality = 15,
            //         PhotoSize = Plugin.Media.Abstractions.PhotoSize.Full,
            //     });
            //
            //     if (file == null)
            //         return;
            //
            //     AddPhoto(file);
            // }
            // catch
            // {
            //     return;
            // }
        }

        private async void OpenCamera()
        {
            try
            {
                var file = await MediaPicker.CapturePhotoAsync();
                if (file != null)
                    AddPhoto(file);
            }
            catch (FeatureNotSupportedException fnsEx)
            {
                await MaterialDialog.Instance.AlertAsync("Feature Not Supported!");
            }
            catch (PermissionException pEx)
            {
                await MaterialDialog.Instance.AlertAsync("Permission Not Granted!");
            }
            catch (Exception ex)
            {
                Console.WriteLine($"CapturePhotoAsync THREW: {ex.Message}");
            }
            
            // try
            // {
            //     await CrossMedia.Current.Initialize();
            //
            //     if (!CrossMedia.Current.IsCameraAvailable || !CrossMedia.Current.IsTakePhotoSupported)
            //     {
            //         return;
            //     }
            //
            //     String filename = String.Format("{0:yyyy-MM-dd HH:mm:ss.fff}.png", DateTime.Now);
            //
            //     var file = await CrossMedia.Current.TakePhotoAsync(new Plugin.Media.Abstractions.StoreCameraMediaOptions
            //     {
            //         Name = filename,
            //         CompressionQuality = 15,
            //         PhotoSize = Plugin.Media.Abstractions.PhotoSize.Full,
            //         SaveMetaData = false
            //     });
            //
            //     if (file == null)
            //         return;
            //
            //     AddPhoto(file);
            // }
            // catch (Exception e)
            // {
            //
            // }
        }

        private async void AddVideo(FileResult file)
        {
            try
            {
                using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Adding Video"))
                {
                    var memoryStream = new MemoryStream();
                    using (var stream = await file.OpenReadAsync())
                        await stream.CopyToAsync(memoryStream);

                    //file.GetStreamWithImageRotatedForExternalStorage().CopyTo(memoryStream);

                    var data = memoryStream.ToArray();

                    bytes = data;

                    ImageSource src = ImageSource.FromStream(() => new MemoryStream(data));

                    MediaElement element = new MediaElement();
                    element.HorizontalOptions = LayoutOptions.Center;
                    element.VerticalOptions = LayoutOptions.Center;
                    element.ShowsPlaybackControls = true;
                    element.Aspect = Aspect.Fill;
                    element.HeightRequest = 800;
                    element.WidthRequest = 400;
                    element.AutoPlay = false;
                    element.Margin = 5;
                    element.Source = file.FileName;

                    Device.BeginInvokeOnMainThread(() =>
                    {
                        try
                        {
                            Children.Clear();
                            RowDefinitions.Clear();
                            ColumnDefinitions.Clear();
                            RowDefinitions.Add(new RowDefinition() { Height = new GridLength(35, GridUnitType.Absolute) });
                            RowDefinitions.Add(new RowDefinition() { Height = new GridLength(1, GridUnitType.Auto) });
                            ColumnDefinitions.Add(new ColumnDefinition { Width = new GridLength(1, GridUnitType.Auto) });


                            Image img = new Image { Source = "closee" };
                            img.GestureRecognizers.Add(new TapGestureRecognizer
                            {
                                Command = new Command(OnVideoTap),
                                CommandParameter = data,
                                NumberOfTapsRequired = 1
                            });
                            img.HorizontalOptions = LayoutOptions.Center;
                            img.VerticalOptions = LayoutOptions.Center;
                            img.HeightRequest = 35;
                            img.WidthRequest = 35;
                            img.Margin = new Thickness(5, 5, 5, 0);

                            SetRow(img, 0);
                            SetColumn(img, 0);

                            SetRow(element, 1);
                            SetColumn(element, 0);
                            Padding = new Thickness(0);
                            Children.Add(img);
                            Children.Add(element);
                            HorizontalOptions = LayoutOptions.CenterAndExpand;
                            ForceLayout();
                        }
                        catch { }
                    });
                }
            }
            catch
            { }
        }

        private void OnVideoTap(object obj)
        {
            bytes = new byte[] { };
            RowDefinitions.Clear();
            ColumnDefinitions.Clear();
            DoDelete();
        }

        private async void AddPhoto(FileResult file)
        {
            try
            {
                using (await MaterialDialog.Instance.LoadingDialogAsync(message: "Adding Photo"))
                {
                    var memoryStream = new MemoryStream();
                    
                    using (var stream = await file.OpenReadAsync())
                        await stream.CopyToAsync(memoryStream);

                    // if (Device.RuntimePlatform.Equals(Device.Android))
                    //     file.GetStream().CopyTo(memoryStream);
                    // else if (Device.RuntimePlatform.Equals(Device.iOS))
                    //     file.GetStreamWithImageRotatedForExternalStorage().CopyTo(memoryStream);

                    var data = memoryStream.ToArray();

                    DataToImage(data);
                }
            }
            catch
            { }
        }

        public void DataToImage(byte[] data)
        {
            try
            {
                ImageSource src = ImageSource.FromStream(() => new MemoryStream(data));

                Image = new Image();
                Image.HeightRequest = 200;
                Image.WidthRequest = 200;
                Image.Aspect = Aspect.AspectFit;
                Image.VerticalOptions = LayoutOptions.FillAndExpand;
                Image.HorizontalOptions = LayoutOptions.FillAndExpand;
                Image.Source = src;
                Image.GestureRecognizers.Add(new TapGestureRecognizer
                {
                    Command = new Command(OnTap),
                    CommandParameter = src,
                    NumberOfTapsRequired = 1
                });
                if (Image != null)
                {
                    Device.BeginInvokeOnMainThread(() =>
                    {
                        Children.Clear();
                        RowDefinitions.Clear();
                        ColumnDefinitions.Clear();
                        Children.Add(Image);
                    });
                }
            }
            catch
            { }
        }

        private void OnTap(object obj)
        {
            ImageViewerEditor imageViewEditor = new ImageViewerEditor(
                obj as ImageSource,
                DataToImage,
                DoDelete
            );
            Navigation.PushAsync(imageViewEditor);
        }

        private void ImageViewEditor_OnSaveSelected(byte[] array)
        {
            
        }

        private void DoDelete()
        {
            Document = new Document();
            Image = new Image();
            Image.Source = null;
            Children.Clear();
            AddColumnsAndRows();
            AddButtons();
        }

        public void ClearItems()
        {
            Image = new Image();
            Image.Source = null;
            Children.Clear();
        }
    }
}