Replace or create a copy of learning worlds when uploading

Changelog.md

@@ -13,6 +13,7 @@
   - You can now import learning worlds from .zip archives.
 - New list of previously uploaded learning worlds that appears after logging in to the LMS.
 - Previously uploaded worlds can now be deleted from the LMS and the AdLerBackend.
+- Before a learning world is uploaded, the system now checks whether a learning world with the same name already exists on the backend. If there is a duplicate, the author can decide whether to replace the learning world or create a copy.
 - Authors can now assign an enrolment key for their learning world.
 - Learning outcomes can now be created for learning spaces using an input form.
 - A new button in the header bar shows an overview of all learning outcomes in the selected world.

IntegrationTest/Dialogues/ReplaceCopyLmsWorldDialogIt.cs

@@ -0,0 +1,39 @@
+using System.Threading.Tasks;
+using Bunit;
+using MudBlazor;
+using NUnit.Framework;
+using Presentation.Components.Dialogues;
+using Shared;
+
+namespace IntegrationTest.Dialogues;
+
+[TestFixture]
+public class ReplaceCopyLmsWorldDialogIt : MudDialogTestFixture<ReplaceCopyLmsWorldDialog>
+{
+    [Test]
+    public async Task CopyButtonPressed_CallsDialogAndReturnsResult()
+    {
+        var dialog = await OpenDialogAndGetDialogReferenceAsync();
+
+
+        var buttons = DialogProvider.FindComponents<MudButton>();
+        buttons[1].Find("button").Click();
+
+        var result = await dialog.Result;
+        Assert.That(result.Data, Is.EqualTo(ReplaceCopyLmsWorldDialogResult.Copy));
+        Assert.That(result.Canceled, Is.False);
+    }
+
+    [Test]
+    public async Task CancelButtonPressed_CallsDialogAndReturnsResult()
+    {
+        var dialog = await OpenDialogAndGetDialogReferenceAsync();
+
+        var buttons = DialogProvider.FindComponents<MudButton>();
+        buttons[2].Find("button").Click();
+
+        var result = await dialog.Result;
+        Assert.That(result.Data, Is.Null);
+        Assert.That(result.Canceled, Is.True);
+    }
+}

Presentation/Components/Dialogues/ReplaceCopyLmsWorldDialog.razor

@@ -0,0 +1,59 @@
+@using Microsoft.Extensions.Localization
+@using System.Diagnostics.CodeAnalysis
+@using Shared
+<MudDialog>
+    <DialogContent>
+        @((MarkupString)Localizer["ReplaceCopyLmsWorldDialog.DialogContent", LmsWorldName].ToString())
+    </DialogContent>
+    <DialogActions>
+        <MudButton Color="Color.Info" OnClick="Replace">@Localizer["ReplaceCopyLmsWorldDialog.ReplaceButtonText"]</MudButton>
+        <MudButton Color="Color.Warning" OnClick="Copy">@Localizer["ReplaceCopyLmsWorldDialog.CopyButtonText"]</MudButton>
+        <MudButton Color="Color.Dark" OnClick="Cancel">@Localizer["ReplaceCopyLmsWorldDialog.CancelButtonText"]</MudButton>
+    </DialogActions>
+</MudDialog>
+
+@code {
+    [CascadingParameter] public MudDialogInstance? MudDialog { get; set; }
+
+    [Inject, AllowNull] //can never be null, DI will throw exception on unresolved types - n.stich
+    IDialogService DialogService { get; set; }
+
+    [Inject, AllowNull] //can never be null, DI will throw exception on unresolved types - n.stich
+    private IStringLocalizer<ReplaceCopyLmsWorldDialog> Localizer { get; set; }
+
+    [Parameter] public string LmsWorldName { get; set; } = string.Empty;
+
+    private async void Replace()
+    {
+        var options = new DialogOptions
+        {
+            CloseButton = true,
+            CloseOnEscapeKey = true,
+            DisableBackdropClick = true,
+        };
+        var parameters = new DialogParameters
+        {
+            { "DialogText", Localizer["ReplaceCopyLmsWorldDialog.ConfirmationDialogText"].ToString() },
+            { "SubmitButtonText", Localizer["ReplaceCopyLmsWorldDialog.ConfirmationDialogSubmitButtonText"].ToString() }
+        };
+        var dialog = await DialogService.ShowAsync<GenericCancellationConfirmationDialog>(Localizer["ReplaceCopyLmsWorldDialog.ConfirmationDialogTitle"].ToString(), parameters,
+            options);
+        var result = await dialog.Result;
+
+        if (result.Data is bool && (bool)result.Data)
+        {
+            MudDialog!.Close(DialogResult.Ok(ReplaceCopyLmsWorldDialogResult.Replace));
+        }
+    }
+
+    private void Copy()
+    {
+        MudDialog!.Close(DialogResult.Ok(ReplaceCopyLmsWorldDialogResult.Copy));
+    }
+
+    private void Cancel()
+    {
+        MudDialog!.Close(DialogResult.Cancel());
+    }
+
+}

Presentation/Presentation.csproj

@@ -79,6 +79,16 @@
     <Compile Remove="PresentationLogic\EntityMapping\LearningElementMapper\LearningElementMapper.cs" />
     <Compile Remove="PresentationLogic\EntityMapping\LearningElementMapper\H5PActivationElementMapper.cs" />
     <Compile Remove="PresentationLogic\LearningContent\LearningContentViewModel.cs" />
+    <Compile Update="Resources\Components\Dialogues\OverwriteLmsWorldDialog.de.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>OverwriteLmsWorldDialog.de.resx</DependentUpon>
+    </Compile>
+    <Compile Update="Resources\Components\Dialogues\OverwriteLmsWorldDialog.en.Designer.cs">
+      <DesignTime>True</DesignTime>
+      <AutoGen>True</AutoGen>
+      <DependentUpon>OverwriteLmsWorldDialog.en.resx</DependentUpon>
+    </Compile>
   </ItemGroup>
   <ItemGroup>
     <EmbeddedResource Update="Resources\Components\Culture\CultureSelector.en.resx">
@@ -195,6 +205,14 @@
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>ConditionToggleSwitch.en.Designer.cs</LastGenOutput>
     </EmbeddedResource>
+    <EmbeddedResource Update="Resources\Components\Dialogues\ReplaceCopyLmsWorldDialog.de.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>OverwriteLmsWorldDialog.de.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
+    <EmbeddedResource Update="Resources\Components\Dialogues\ReplaceCopyLmsWorldDialog.en.resx">
+      <Generator>ResXFileCodeGenerator</Generator>
+      <LastGenOutput>OverwriteLmsWorldDialog.en.Designer.cs</LastGenOutput>
+    </EmbeddedResource>
     <EmbeddedResource Update="Resources\Components\LearningOutcomes\CreateEditManualLearningOutcome.de.resx">
       <Generator>ResXFileCodeGenerator</Generator>
       <LastGenOutput>CreateEditManualLearningOutcome.de.Designer.cs</LastGenOutput>

Presentation/Resources/Components/Dialogues/ReplaceCopyLmsWorldDialog.de.resx

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<root>
+    <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="root"
+                xmlns="">
+        <xsd:element name="root" msdata:IsDataSet="true">
+
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral,
+            PublicKeyToken=b77a5c561934e089
+        </value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral,
+            PublicKeyToken=b77a5c561934e089
+        </value>
+    </resheader>
+    <data name="ReplaceCopyLmsWorldDialog.ReplaceButtonText" xml:space="preserve">
+        <value>Lernwelt ersetzen</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.CopyButtonText" xml:space="preserve">
+        <value>Kopie von Lernwelt erstellen</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.CancelButtonText" xml:space="preserve">
+        <value>Abbrechen</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.DialogContent" xml:space="preserve">
+        <value>Auf dem LMS Moodle existiert bereits eine Lernwelt mit dem Namen  &lt;b&gt;{0}&lt;/b&gt;. Möchten Sie diese Lernwelt ersetzen oder eine Kopie erstellen?</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogText" xml:space="preserve">
+        <value>Sind Sie sicher, dass Sie die bestehende Lernwelt ersetzen möchten? Alle Daten der bisherigen Lernwelt, einschließlich des Nutzerfortschritts, werden damit unwiderruflich gelöscht.</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogTitle" xml:space="preserve">
+        <value>Sind Sie sicher?</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogSubmitButtonText" xml:space="preserve">
+        <value>Ja</value>
+    </data>
+</root>

Presentation/Resources/Components/Dialogues/ReplaceCopyLmsWorldDialog.en.resx

@@ -0,0 +1,47 @@
+<?xml version="1.0" encoding="utf-8"?>
+
+<root>
+    <xsd:schema xmlns:xsd="http://www.w3.org/2001/XMLSchema" xmlns:msdata="urn:schemas-microsoft-com:xml-msdata" id="root"
+                xmlns="">
+        <xsd:element name="root" msdata:IsDataSet="true">
+
+        </xsd:element>
+    </xsd:schema>
+    <resheader name="resmimetype">
+        <value>text/microsoft-resx</value>
+    </resheader>
+    <resheader name="version">
+        <value>1.3</value>
+    </resheader>
+    <resheader name="reader">
+        <value>System.Resources.ResXResourceReader, System.Windows.Forms, Version=2.0.0.0, Culture=neutral,
+            PublicKeyToken=b77a5c561934e089
+        </value>
+    </resheader>
+    <resheader name="writer">
+        <value>System.Resources.ResXResourceWriter, System.Windows.Forms, Version=2.0.0.0, Culture=neutral,
+            PublicKeyToken=b77a5c561934e089
+        </value>
+    </resheader>
+    <data name="ReplaceCopyLmsWorldDialog.ReplaceButtonText" xml:space="preserve">
+        <value>Replace learning world</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.CancelButtonText" xml:space="preserve">
+        <value>Cancel</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.CopyButtonText" xml:space="preserve">
+        <value>Create Copy of learning world</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.DialogContent" xml:space="preserve">
+        <value>A learning world with the name &lt;b&gt;{0}&lt;/b&gt;. already exists on the LMS Moodle. Would you like to replace it or create a copy?</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogText" xml:space="preserve">
+        <value>Are you sure you want to replace the existing learning world? All data from the previous learning world, including user progress, will be irrevocably deleted.</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogTitle" xml:space="preserve">
+        <value>Are you sure?</value>
+    </data>
+    <data name="ReplaceCopyLmsWorldDialog.ConfirmationDialogSubmitButtonText" xml:space="preserve">
+        <value>Yes</value>
+    </data>
+</root>

Presentation/Resources/View/HeaderBar.de.resx

@@ -144,6 +144,9 @@
     <data name="HeaderBar.Help.Tutorial" xml:space="preserve">
         <value>Tutorial</value>
     </data>
+    <data name="ConfirmReplaceOrCreateCopyDialog.Title" xml:space="preserve">
+        <value>Lernwelt existiert bereits</value>
+    </data>
     <data name="LearningOutcomes.Overview" xml:space="preserve">
         <value>Lernziele dieser Lernwelt</value>
     </data>

Presentation/Resources/View/HeaderBar.en.resx

@@ -144,6 +144,9 @@
     <data name="HeaderBar.Help.Tutorial" xml:space="preserve">
         <value>Tutorial</value>
     </data>
+    <data name="ConfirmReplaceOrCreateCopyDialog.Title" xml:space="preserve">
+        <value>Learning world already exists</value>
+    </data>
     <data name="LearningOutcomes.Overview" xml:space="preserve">
         <value>Learning outcomes of this learning world</value>
     </data>

Presentation/View/HeaderBar.razor

@@ -8,6 +8,7 @@
 @using Presentation.PresentationLogic.LearningWorld
 @using Presentation.PresentationLogic.Mediator
 @using Presentation.PresentationLogic.SelectedViewModels
+@using Shared
 @using Shared.Exceptions
 @using Presentation.PresentationLogic.API
 @using Presentation.PresentationLogic.AuthoringToolWorkspace
@@ -25,7 +26,7 @@
 
 <header class=" grid grid-cols-3 grid-rows-1 w-full bg-buttonbgblue items-center">
     <div class="ml-1 flex justify-start items-center gap-2">
-        <MudIconButton Class="p-1 text-adlerdarkblue" Icon="@Icons.Material.Filled.Home" Size="Size.Large" Title=@Localizer["LearningWorld.Home.Hover"]  @onclick="OnClickMyLearningWorldsOverview"></MudIconButton>
+        <MudIconButton Class="p-1 text-adlerdarkblue" Icon="@Icons.Material.Filled.Home" Size="Size.Large" Title=@Localizer["LearningWorld.Home.Hover"]     @onclick="OnClickMyLearningWorldsOverview"></MudIconButton>
         <MudDivider Vertical="true" FlexItem="true"/>
         <div class="relative">
             <MudIconButton Class="p-1 text-adlerdarkblue" Icon="@Icons.Material.Filled.Save" Title=@Localizer["LearningWorld.Save.Hover"] OnClick="TrySave">
@@ -117,9 +118,8 @@
         }
 
         <CultureSelector/>
-
         <MudIconButton Class="p-1 text-adlerdarkblue" OnClick="@ShowLearningOutcomesOverview" Disabled="@(SelectedViewModelsProvider.LearningWorld == null)" Icon="@learningOutcomeIcon" Title="@Localizer["LearningOutcomes.Overview"]"></MudIconButton>
-        
+
         <MudMenu Dense="true" AnchorOrigin="Origin.BottomCenter" Icon="@icon">
             <MudMenuItem Disabled="true">@Localizer["HeaderBar.Help.UserManual"]</MudMenuItem>
             <MudMenuItem Disabled="true">@Localizer["HeaderBar.Help.Tutorial"]</MudMenuItem>
@@ -250,12 +250,7 @@
                 Localizer["Dialog.UploadLearningWorld.DialogText", world.Name].ToString()
             },
         };
-        var options = new DialogOptions
-        {
-            CloseButton = true,
-            CloseOnEscapeKey = true,
-            DisableBackdropClick = true,
-        };
+        var options = CreateUnskippableDialogOptions();
         var dialog =
             await DialogService.ShowAsync<GenericCancellationConfirmationDialog>(Localizer["DialogService.UploadLearningWorld.Dialog"].ToString(), parameters,
                 options);
@@ -264,6 +259,13 @@
         //if not cancelled, upload LearningWorld
         if (result.Canceled) return;
 
+        var existingLmsWorlds = await PresentationLogic.GetLmsWorldList();
+        if (existingLmsWorlds.Any(lmsWorld => lmsWorld.WorldName == world.Name))
+        {
+            var confirmReplaceOrCreateCopyAsync = await ConfirmReplaceOrCreateCopyAsync(world.Name, existingLmsWorlds);
+            if (!confirmReplaceOrCreateCopyAsync) return;
+        }
+
         //present progress dialog
         var cancellationTokenSource = new CancellationTokenSource();
         var progress = new Progress<int>();
@@ -310,6 +312,45 @@
         StateHasChanged();
     }
 
+    private async Task<bool> ConfirmReplaceOrCreateCopyAsync(string worldName, List<LmsWorldViewModel> lmsWorlds)
+    {
+        var options = CreateUnskippableDialogOptions();
+        var parameters = new DialogParameters
+        {
+            { "LmsWorldName", worldName }
+        };
+        var replaceCopyLmsWorldDialog = await DialogService.ShowAsync<ReplaceCopyLmsWorldDialog>(@Localizer["ConfirmReplaceOrCreateCopyDialog.Title"], parameters, options);
+        var result = await replaceCopyLmsWorldDialog.Result;
+
+        if (result.Canceled)
+        {
+            return false;
+        }
+
+        switch ((ReplaceCopyLmsWorldDialogResult)result.Data)
+        {
+            case ReplaceCopyLmsWorldDialogResult.Replace:
+                await PresentationLogic.DeleteLmsWorld(lmsWorlds.First(lmsWorld => lmsWorld.WorldName == worldName));
+                break;
+            case ReplaceCopyLmsWorldDialogResult.Copy:
+                break;
+        }
+
+        return true;
+    }
+
+    private static DialogOptions CreateUnskippableDialogOptions()
+    {
+        var options = new DialogOptions
+        {
+            CloseButton = true,
+            CloseOnEscapeKey = true,
+            DisableBackdropClick = true,
+        };
+        return options;
+    }
+
+
     private void ShowUploadSuccessfulDialog(UploadResponseViewModel response)
     {
         var options = new DialogOptions