mirror of
https://dev.azure.com/TeilRad/sharee.bike%20App/_git/Code
synced 2024-05-29 12:16:37 +02:00
285 lines
8.5 KiB
C#
285 lines
8.5 KiB
C#
using System;
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using System.ComponentModel;
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using System.Threading.Tasks;
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using Serilog;
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using TINK.Model.Bikes;
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using TINK.Model;
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using TINK.Model.Device;
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using TINK.Model.Services.CopriApi;
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using Xamarin.Essentials;
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using Xamarin.Forms;
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using TINK.Model.Connector;
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namespace TINK.ViewModel.Info
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{
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/// <summary> Manges the tabbed info page. </summary>
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public class InfoPageViewModel : INotifyPropertyChanged
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{
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/// <summary> Fired whenever a property changed.</summary>
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public event PropertyChangedEventHandler PropertyChanged;
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/// <summary> Holds the name of the host.</summary>
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private string HostName { get; }
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/// <summary> Holds value whether site caching is on or off.</summary>
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bool IsSiteCachingOn { get; }
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/// <summary>
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/// Relative path to agb resources of empty if value was not yet querried from backend.
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/// </summary>
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private string AgbResourcePath { get; set; }
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/// <summary>
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/// Relative path to privacy resources of empty if value was not yet querried from backend.
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/// </summary>
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private string PrivacyResourcePath { get; set; }
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/// <summary>
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/// Relative path to impress resources of empty if value was not yet querried from backend.
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/// </summary>
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private string ImpressResourcePath { get; set; }
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private bool _IsIdle = false;
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/// <summary>
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/// Is true if no action is pending, false otherwise.
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/// </summary>
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public bool IsIdle
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{
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get => _IsIdle;
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private set
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{
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if (_IsIdle == value)
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{
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// Nothing to do.
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return;
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}
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_IsIdle = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(IsIdle)));
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return;
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}
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}
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/// <summary>
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/// Object to query resources urls object from backend if required.
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/// This object is used to update resources path values <see cref="AgbResourcePath"/>, <see cref="PrivacyResourcePath"/> and <see cref="ImpressResourcePath"/> from.
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/// </summary>
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private Func<IQuery> QueryProvider { get; }
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/// <summary>
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/// Action to update shared resources urls object exposed by main model.
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/// </summary>
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private Action<IResourceUrls> UpdateUrlsAction { get; }
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/// <summary> Constructs Info view model</summary>
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/// <param name="hostName">Name of the host to get html resources from.</param>
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/// <param name="isSiteCachingOn">Holds value whether site caching is on or off.</param>
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/// <param name="agbResourcePath"> Agb resource path received from backend.</param>
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/// <param name="privacyResourcePath"> Privacy resource path received from backend.</param>
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/// <param name="impressResourcePath"> Impress resource path received from backend.</param>
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/// <param name="resourceProvider">Delegate to get embedded html resource. Used as fallback if download from web page does not work and cache is empty.</param>
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/// <param name="queryProvider">Object to query resources urls object from backend if required.</param>
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/// <param name="updateUrlsAction">Action to update shared resources urls object</param>
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public InfoPageViewModel(
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string hostName,
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string agbResourcePath,
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string privacyResourcePath,
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string impressResourcePath,
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bool isSiteCachingOn,
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Func<string, string> resourceProvider,
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Func<IQuery> queryProvider,
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Action<IResourceUrls> updateUrlsAction)
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{
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HostName = hostName;
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AgbResourcePath = agbResourcePath;
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PrivacyResourcePath = privacyResourcePath;
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ImpressResourcePath = impressResourcePath;
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IsSiteCachingOn = isSiteCachingOn;
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QueryProvider = queryProvider;
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UpdateUrlsAction = updateUrlsAction;
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InfoAgb = new HtmlWebViewSource { Html = "<html>Loading...</html>" };
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ResourceProvider = resourceProvider
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?? throw new ArgumentException($"Can not instantiate {typeof(InfoPageViewModel)}-object. No resource provider centered.");
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}
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/// <summary> Called when page is shown. </summary>
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public async void OnAppearing()
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{
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// Get resource urls object from backend.
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async Task<IResourceUrls> GetUrls()
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{
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Result<BikeCollection> bikes;
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try
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{
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bikes = await QueryProvider().GetBikesAsync();
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}
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catch (Exception ex)
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{
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Log.ForContext<InfoPageViewModel>().Error($"Getting resource urls from COPRI failed. {ex.Message}");
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return new ResourceUrls();
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}
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IResourceUrls resourceUrls = bikes?.GeneralData?.ResourceUrls ?? new ResourceUrls();
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return resourceUrls;
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}
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// Set state to busy.
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IsIdle = false;
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// Check if urls to show info from are already known.
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if (string.IsNullOrEmpty(PrivacyResourcePath))
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{
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var urls = await GetUrls();
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PrivacyResourcePath = urls.PrivacyResourcePath;
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ImpressResourcePath = urls.ImpressResourcePath;
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AgbResourcePath = urls.AgbResourcePath;
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UpdateUrlsAction(urls); // Update main model to prevent duplicate queries.
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}
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// Gets privacy info from server.
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async Task<HtmlWebViewSource> GetInfoPrivacy()
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{
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string GetUriText()
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=> $"https://{HostName}/{PrivacyResourcePath}";
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if (string.IsNullOrEmpty(PrivacyResourcePath))
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{
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// Information to access resource is missing
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return new HtmlWebViewSource
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{
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Html = await Task.FromResult(ViewModelHelper.FromBody("No privacy resource available. Resource path is null or empty."))
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};
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}
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Log.Debug($"Request to open url {GetUriText()} to get privacy info.");
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return new HtmlWebViewSource
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{
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Html = await ViewModelHelper.GetSource(
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GetUriText(), // "site/privacy.html"
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IsSiteCachingOn)
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};
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}
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// Gets impress info from server.
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async Task<HtmlWebViewSource> GetImpressum()
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{
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string GetUriText()
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=> $"https://{HostName}/{ImpressResourcePath}";
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if (string.IsNullOrEmpty(ImpressResourcePath))
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{
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// Information to access resource is missing
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return new HtmlWebViewSource
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{
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Html = await Task.FromResult(ViewModelHelper.FromBody("No impress resource available. Resource path is null or empty."))
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};
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}
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Log.Debug($"Request to open url {GetUriText()} to get impress info.");
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return new HtmlWebViewSource
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{
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Html = await ViewModelHelper.GetSource(
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GetUriText(), // "site/privacy.html"
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IsSiteCachingOn)
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};
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}
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InfoAgb = await GetAgb(HostName, AgbResourcePath, IsSiteCachingOn);
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InfoPrivacy = await GetInfoPrivacy();
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InfoImpressum = await GetImpressum();
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// Set state to idle.
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IsIdle = true;
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}
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/// <summary> Gets the AGBs</summary>
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/// <param name="resourceProvider"></param>
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/// <returns> AGBs</returns>
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public static async Task<HtmlWebViewSource> GetAgb(
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string hostName,
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string agbResourcePath,
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bool isSiteCachingOn)
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{
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string GetUriText()
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=> $"https://{hostName}/{agbResourcePath}";
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if (string.IsNullOrEmpty(agbResourcePath))
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{
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return new HtmlWebViewSource
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{
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Html = await Task.FromResult(ViewModelHelper.FromBody("No terms resource available. Resource path is null or empty."))
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};
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}
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Log.Debug($"Request to open url {GetUriText()} to get AGB infos.");
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return new HtmlWebViewSource
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{
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Html = await ViewModelHelper.GetSource(
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GetUriText(), // "agb.html"
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isSiteCachingOn)
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};
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}
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/// <summary> Gets the platfrom specific prefix. </summary>
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private Func<string, string> ResourceProvider { get; set; }
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/// <summary> Gets the app related information (app version and licenses). </summary>
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public HtmlWebViewSource InfoLicenses => new HtmlWebViewSource
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{
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Html = ResourceProvider("HtmlResouces.V02.InfoLicenses.html")
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.Replace("CURRENT_VERSION_TINKAPP", DependencyService.Get<IAppInfo>().Version.ToString())
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.Replace("ACTIVE_APPNAME", AppInfo.Name)
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.Replace("APPSUPPORTMAILADDRESS", ContactPageViewModel.APPSUPPORTMAILADDRESS)
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};
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/// <summary> Privacy text.</summary>
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private HtmlWebViewSource infoImpress;
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/// <summary> Gets the privacy related information. </summary>
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public HtmlWebViewSource InfoImpressum
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{
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get => infoImpress;
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set
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{
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infoImpress = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(InfoImpressum)));
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}
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}
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/// <summary> Agb information text.</summary>
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private HtmlWebViewSource infoAgb;
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/// <summary> Privacy text.</summary>
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private HtmlWebViewSource infoPrivacy;
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/// <summary> Agb information text.</summary>
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public HtmlWebViewSource InfoAgb
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{
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get => infoAgb;
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set
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{
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infoAgb = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(InfoAgb)));
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}
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}
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/// <summary> Agb information text.</summary>
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public HtmlWebViewSource InfoPrivacy
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{
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get => infoPrivacy;
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set
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{
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infoPrivacy = value;
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PropertyChanged?.Invoke(this, new PropertyChangedEventArgs(nameof(InfoPrivacy)));
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}
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}
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}
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}
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