bykovme/nswallet

using System;
using NSWallet.NetStandard.Helpers.Fonts;
using NSWallet.NetStandard.Helpers.UI.NavigationHeader;
using NSWallet.Shared;
using NSWallet.Shared.Helpers.Logs.AppLog;
using Xamarin.Forms;

namespace NSWallet.NetStandard.Views.Feedback
{
    public class FeedbackPageView : ContentPage
    {
        public FeedbackPageView()
        {
            UINavigationHeader.SetCommonTitleView(this, TR.Tr("nswallet_feedback"));

            var pageVM = new FeedbackPageViewModel(Navigation);
            BindingContext = pageVM;

            var mainStackLayout = new StackLayout();

            var proceedToFeedback = new Button();
            proceedToFeedback.FontFamily = NSWFontsController.CurrentTypeface;
            proceedToFeedback.FontSize = FontSizeController.GetSize(NamedSize.Medium, typeof(Button));
            proceedToFeedback.SetBinding(Button.CommandProperty, "FeedbackProceedCommand");
            proceedToFeedback.CornerRadius = 0;
            proceedToFeedback.BackgroundColor = Theme.Current.PremiumButtonPremScrBackgroundColor;
            proceedToFeedback.TextColor = Theme.Current.PremiumButtonPremScrTextColor;
            proceedToFeedback.HorizontalOptions = LayoutOptions.FillAndExpand;
            proceedToFeedback.Text = TR.Tr("proceed_to_feedback");
            mainStackLayout.Children.Add(proceedToFeedback);

            var privacyPolicyLabel = new Label {
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                VerticalOptions = LayoutOptions.CenterAndExpand,
                HorizontalTextAlignment = TextAlignment.Center,
                Margin = new Thickness(15),
                TextColor = Theme.Current.CommonButtonTextColor,
                FontSize = FontSizeController.GetSize(NamedSize.Micro, typeof(Button)),
                FontFamily = NSWFontsController.CurrentBoldTypeface,
                Text = TR.Tr("privacy_policy")
            };

            var privacyPolicyTappedGesture = new TapGestureRecognizer();
            privacyPolicyTappedGesture.SetBinding(TapGestureRecognizer.CommandProperty, "PrivacyPolicyCommand");

            var privacyPolicyButton = new StackLayout {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                BackgroundColor = Theme.Current.CommonButtonBackground,
                Children = {
                    privacyPolicyLabel
                },
                GestureRecognizers = {
                    privacyPolicyTappedGesture
                }
            };

            var termsOfUseLabel = new Label {
                HorizontalOptions = LayoutOptions.CenterAndExpand,
                VerticalOptions = LayoutOptions.CenterAndExpand,
                HorizontalTextAlignment = TextAlignment.Center,
                Margin = new Thickness(15),
                TextColor = Theme.Current.CommonButtonTextColor,
                FontSize = FontSizeController.GetSize(NamedSize.Micro, typeof(Button)),
                FontFamily = NSWFontsController.CurrentBoldTypeface,
                Text = TR.Tr("terms_of_use")
            };

            var termsOfUseTappedGesture = new TapGestureRecognizer();
            termsOfUseTappedGesture.SetBinding(TapGestureRecognizer.CommandProperty, "TermsOfUseCommand");

            var termsOfUseButton = new StackLayout {
                HorizontalOptions = LayoutOptions.FillAndExpand,
                BackgroundColor = Theme.Current.CommonButtonBackground,
                Children = {
                    termsOfUseLabel
                },
                GestureRecognizers = {
                    termsOfUseTappedGesture
                }
            };

            var buttonsLayout = new Grid {
                VerticalOptions = LayoutOptions.End,
                RowDefinitions = {
                    new RowDefinition {
                        Height = new GridLength(1, GridUnitType.Star)
                    }
                },
                ColumnDefinitions = {
                    new ColumnDefinition {
                        Width = new GridLength(1, GridUnitType.Star)
                    },
                    new ColumnDefinition {
                        Width = new GridLength(1, GridUnitType.Star)
                    }
                }
            };

            buttonsLayout.Children.Add(privacyPolicyButton, 0, 0);
            buttonsLayout.Children.Add(termsOfUseButton, 1, 0);

            mainStackLayout.Children.Add(buttonsLayout);

            var webView = new WebView {
                VerticalOptions = LayoutOptions.FillAndExpand,
                HorizontalOptions = LayoutOptions.FillAndExpand
            };

            var webSource = new HtmlWebViewSource();
            webView.Source = webSource;
            webSource.SetBinding(HtmlWebViewSource.HtmlProperty, "HtmlText");
            mainStackLayout.Children.Add(webView);

            // A crutch to ensure that when any page is updated, the buttons do not slide down or under the WebView
            mainStackLayout.SizeChanged += (sender, e) => {
                try {
                    if (buttonsLayout != null) {
                        mainStackLayout.Children.Remove(buttonsLayout);
                        mainStackLayout.Children.Add(buttonsLayout);
                    }
                } catch (Exception ex) {
                    AppLogs.Log(ex.Message, nameof(FeedbackPageView), nameof(FeedbackPageView));
                }
            };

            Content = mainStackLayout;
        }
    }
}