Add edit functionality for device statistics with form validation

Aaru.Server/Components/Admin/Pages/DeviceStats/Edit.razor

@@ -0,0 +1,46 @@
+@page "/admin/device-stats/edit/{Id:int}"
+@attribute [Authorize]
+@layout AdminLayout
+
+@inject Microsoft.EntityFrameworkCore.IDbContextFactory<DbContext> DbContextFactory
+
+<PageTitle>Edit Device Statistic</PageTitle>
+
+@if(!isLoaded)
+{
+    <div>Loading...</div>
+}
+else if(deviceStat == null)
+{
+    <div class="alert alert-danger">Device statistic not found.</div>
+}
+else
+{
+    <EditForm Model="deviceStat" OnValidSubmit="HandleValidSubmit">
+        <DataAnnotationsValidator />
+        <ValidationSummary />
+        <div class="mb-3">
+            <label class="form-label">Manufacturer</label>
+            <InputText class="form-control" @bind-Value="deviceStat.Manufacturer" />
+            <ValidationMessage For="@(() => deviceStat.Manufacturer)" />
+        </div>
+        <div class="mb-3">
+            <label class="form-label">Model</label>
+            <InputText class="form-control" @bind-Value="deviceStat.Model" />
+            <ValidationMessage For="@(() => deviceStat.Model)" />
+        </div>
+        <div class="mb-3">
+            <label class="form-label">Revision</label>
+            <InputText class="form-control" @bind-Value="deviceStat.Revision" />
+            <ValidationMessage For="@(() => deviceStat.Revision)" />
+        </div>
+        <div class="mb-3">
+            <label class="form-label">Bus</label>
+            <InputText class="form-control" @bind-Value="deviceStat.Bus" />
+            <ValidationMessage For="@(() => deviceStat.Bus)" />
+        </div>
+        <button type="submit" class="btn btn-primary">Save</button>
+        <button type="button" class="btn btn-secondary ms-2" @onclick="GoBack">Cancel</button>
+    </EditForm>
+}
+

Aaru.Server/Components/Admin/Pages/DeviceStats/Edit.razor.cs

@@ -0,0 +1,73 @@
+using System.ComponentModel.DataAnnotations;
+using Aaru.Server.Database.Models;
+using Microsoft.AspNetCore.Components;
+using DbContext = Aaru.Server.Database.DbContext;
+
+namespace Aaru.Server.Components.Admin.Pages.DeviceStats;
+
+public partial class Edit : ComponentBase
+{
+    DbContext db;
+
+    DeviceStatEditViewModel deviceStat;
+    bool                    isLoaded;
+    [Parameter]
+    public int Id { get; set; }
+
+
+    [Inject]
+    public NavigationManager Navigation { get; set; }
+
+    protected override async Task OnInitializedAsync()
+    {
+        db = await DbContextFactory.CreateDbContextAsync();
+        DeviceStat? entity = await db.DeviceStats.FindAsync(Id);
+
+        if(entity != null)
+        {
+            deviceStat = new DeviceStatEditViewModel
+            {
+                Id           = entity.Id,
+                Manufacturer = entity.Manufacturer,
+                Model        = entity.Model,
+                Revision     = entity.Revision,
+                Bus          = entity.Bus
+            };
+        }
+
+        isLoaded = true;
+    }
+
+    protected async Task HandleValidSubmit()
+    {
+        DeviceStat? entity = await db.DeviceStats.FindAsync(Id);
+
+        if(entity != null)
+        {
+            entity.Manufacturer = deviceStat.Manufacturer;
+            entity.Model        = deviceStat.Model;
+            entity.Revision     = deviceStat.Revision;
+            entity.Bus          = deviceStat.Bus;
+            await db.SaveChangesAsync();
+        }
+
+        Navigation.NavigateTo("/admin/device-stats");
+    }
+
+    protected void GoBack()
+    {
+        Navigation.NavigateTo("/admin/device-stats");
+    }
+
+    public class DeviceStatEditViewModel
+    {
+        public int Id { get; set; }
+        [Required]
+        public string? Manufacturer { get; set; }
+        [Required]
+        public string? Model { get;    set; }
+        public string? Revision { get; set; }
+        [Required]
+        public string Bus { get; set; }
+    }
+}