Implement identity verification feature with image upload and token management

FoodsharingSiegen.Server/Pages/UploadVerification.razor.cs

@@ -0,0 +1,141 @@
+using FoodsharingSiegen.Contracts.Entity;
+using FoodsharingSiegen.Contracts.Model;
+using FoodsharingSiegen.Server.Data.Service;
+using FoodsharingSiegen.Shared.Helper;
+using Microsoft.AspNetCore.Components;
+using Microsoft.AspNetCore.Components.Forms;
+using Microsoft.Extensions.Options;
+
+namespace FoodsharingSiegen.Server.Pages
+{
+    public partial class UploadVerification : ComponentBase
+    {
+        [Inject]
+        public ProspectService ProspectService { get; set; } = null!;
+
+        [Inject]
+        public IOptions<AppSettings> AppSettings { get; set; } = null!;
+
+        [Parameter]
+        public Guid Token { get; set; }
+
+        private bool _isLoading = true;
+        private Prospect? _prospect;
+        
+        private int _uploadedCount = 0;
+        private bool _isUploading = false;
+        
+        private string? _message;
+        private bool _isSuccess;
+        
+        private const int MaxAllowedFiles = 5;
+        private const long MaxFileSize = 10 * 1024 * 1024; // 10 MB
+
+        protected override async Task OnInitializedAsync()
+        {
+            await LoadData();
+        }
+
+        private async Task LoadData()
+        {
+            _isLoading = true;
+            
+            try
+            {
+                var result = await ProspectService.GetProspectByVerificationTokenAsync(Token);
+                
+                if (result.Success && result.Data != null)
+                {
+                    _prospect = result.Data;
+                }
+                else
+                {
+                    _prospect = null;
+                    _message = result.Exception?.Message ?? "Ein Fehler ist aufgetreten.";
+                    _isSuccess = false;
+                }
+            }
+            catch (Exception ex)
+            {
+                _message = $"Fehler: {ex.Message}";
+                _isSuccess = false;
+            }
+            finally
+            {
+                _isLoading = false;
+            }
+        }
+
+        private async Task OnInputFileChange(InputFileChangeEventArgs e)
+        {
+            if (_prospect == null) return;
+            
+            _message = null;
+            
+            var files = e.GetMultipleFiles(MaxAllowedFiles);
+            
+            if (_uploadedCount + files.Count > MaxAllowedFiles)
+            {
+                _message = $"Es sind maximal {MaxAllowedFiles} Bilder erlaubt.";
+                _isSuccess = false;
+                return;
+            }
+
+            _isUploading = true;
+            
+            int successCount = 0;
+            
+            foreach (var file in files)
+            {
+                try
+                {
+                    if (file.Size > MaxFileSize)
+                    {
+                        _message = $"Bild '{file.Name}' überschreitet die erlaubte Größe von 10 MB.";
+                        _isSuccess = false;
+                        continue;
+                    }
+
+                    // Resize the image to a max dimension of 1000 pixels (longest edge) to save DB space
+                    var resizedImageFile = await file.RequestImageFileAsync(file.ContentType, 1000, 1000);
+                    
+                    using var stream = resizedImageFile.OpenReadStream(MaxFileSize);
+                    using var memoryStream = new MemoryStream();
+                    
+                    await stream.CopyToAsync(memoryStream);
+                    
+                    byte[] imageData = memoryStream.ToArray();
+                    
+                    var saveResult = await ProspectService.AddVerificationImageAsync(_prospect.Id, imageData, resizedImageFile.ContentType);
+                    
+                    if (saveResult.Success)
+                    {
+                        successCount++;
+                    }
+                    else
+                    {
+                        _message = $"Fehler beim Speichern von {file.Name}: {saveResult.Exception?.Message}";
+                        _isSuccess = false;
+                        break;
+                    }
+                }
+                catch (Exception ex)
+                {
+                    _message = $"Fehler bei {file.Name}: {ex.Message}";
+                    _isSuccess = false;
+                }
+            }
+
+            _isUploading = false;
+            
+            if (successCount > 0)
+            {
+                _message = $"{successCount} Bild(er) erfolgreich hinzugefügt.";
+                _isSuccess = true;
+                _uploadedCount += successCount;
+            }
+            
+            StateHasChanged();
+        }
+    }
+}