feat: refine content calendar experience

backend/src/Socialize.Api/Modules/Comments/Handlers/CreateComment.cs

@@ -1,6 +1,7 @@
 using FastEndpoints;
 using Microsoft.EntityFrameworkCore;
 using Socialize.Api.Data;
+using Socialize.Api.Infrastructure.BlobStorage.Contracts;
 using Socialize.Api.Infrastructure.Security;
 using Socialize.Api.Modules.ContentItems.Contracts;
 using Socialize.Api.Modules.ContentItems.Data;
@@ -14,7 +15,8 @@ public record CreateCommentRequest(
     Guid WorkspaceId,
     Guid ContentItemId,
     Guid? ParentCommentId,
-    string Body);
+    string Body,
+    IFormFile? Attachment);
 
 public class CreateCommentRequestValidator
     : Validator<CreateCommentRequest>
@@ -23,13 +25,14 @@ public class CreateCommentRequestValidator
     {
         RuleFor(x => x.WorkspaceId).NotEmpty();
         RuleFor(x => x.ContentItemId).NotEmpty();
-        RuleFor(x => x.Body).NotEmpty().MaximumLength(4000);
+        RuleFor(x => x.Body).MaximumLength(4000);
     }
 }
 
 public class CreateCommentHandler(
     AppDbContext dbContext,
     AccessScopeService accessScopeService,
+    IBlobStorage blobStorage,
     IContentItemActivityWriter activityWriter,
     INotificationEventWriter notificationEventWriter)
     : Endpoint<CreateCommentRequest, CommentDto>
@@ -38,10 +41,19 @@ public class CreateCommentHandler(
     {
         Post("/api/comments");
         Options(o => o.WithTags("Comments"));
+        AllowFileUploads();
     }
 
     public override async Task HandleAsync(CreateCommentRequest request, CancellationToken ct)
     {
+        string body = request.Body?.Trim() ?? string.Empty;
+        if (string.IsNullOrWhiteSpace(body) && request.Attachment is null)
+        {
+            AddError(request => request.Body, "A comment body or attachment is required.");
+            await SendErrorsAsync(StatusCodes.Status400BadRequest, ct);
+            return;
+        }
+
         ContentItem? contentItem = await dbContext.ContentItems
             .SingleOrDefaultAsync(
                 candidate => candidate.Id == request.ContentItemId && candidate.WorkspaceId == request.WorkspaceId,
@@ -75,16 +87,70 @@ public class CreateCommentHandler(
             }
         }
 
+        Guid commentId = Guid.NewGuid();
+        string? attachmentFileName = null;
+        string? attachmentContentType = null;
+        long? attachmentSizeBytes = null;
+        string? attachmentBlobName = null;
+        string? attachmentBlobUrl = null;
+
+        if (request.Attachment is not null)
+        {
+            string normalizedContentType = request.Attachment.ContentType.Trim().ToLowerInvariant();
+
+            if (request.Attachment.Length <= 0)
+            {
+                AddError(request => request.Attachment, "The attachment must not be empty.");
+                await SendErrorsAsync(StatusCodes.Status400BadRequest, ct);
+                return;
+            }
+
+            if (!IsInlineAttachmentContentType(normalizedContentType))
+            {
+                AddError(request => request.Attachment, "The attachment must be a PNG or JPEG image.");
+                await SendErrorsAsync(StatusCodes.Status400BadRequest, ct);
+                return;
+            }
+
+            attachmentFileName = NormalizeFileName(request.Attachment.FileName, normalizedContentType);
+            attachmentContentType = normalizedContentType;
+            attachmentSizeBytes = request.Attachment.Length;
+            attachmentBlobName =
+                $"{contentItem.WorkspaceId}/{SubDirectoryNames.Contents}/{contentItem.Id}/comments/{commentId}/{attachmentFileName}";
+
+            try
+            {
+                attachmentBlobUrl = await blobStorage.UploadFileAsync(
+                    ContainerNames.Workspaces,
+                    attachmentBlobName,
+                    request.Attachment.OpenReadStream(),
+                    normalizedContentType,
+                    ct);
+            }
+            catch (InvalidOperationException)
+            {
+                AddError(request => request.Attachment, "The attachment file is invalid or unsupported.");
+                await SendErrorsAsync(StatusCodes.Status400BadRequest, ct);
+                return;
+            }
+        }
+
         Comment comment = new()
         {
-            Id = Guid.NewGuid(),
+            Id = commentId,
             WorkspaceId = request.WorkspaceId,
             ContentItemId = request.ContentItemId,
             ParentCommentId = request.ParentCommentId,
             AuthorUserId = User.GetUserId(),
             AuthorDisplayName = User.GetAlias() ?? User.GetName(),
             AuthorEmail = User.GetEmail(),
-            Body = request.Body.Trim(),
+            Body = body,
+            AttachmentFileName = attachmentFileName,
+            AttachmentContentType = attachmentContentType,
+            AttachmentSizeBytes = attachmentSizeBytes,
+            AttachmentBlobContainerName = attachmentBlobName is not null ? ContainerNames.Workspaces : null,
+            AttachmentBlobName = attachmentBlobName,
+            AttachmentBlobUrl = attachmentBlobUrl,
             CreatedAt = DateTimeOffset.UtcNow,
         };
 
@@ -109,6 +175,7 @@ public class CreateCommentHandler(
                 JsonSerializer.Serialize(new
                 {
                     parentCommentId = comment.ParentCommentId,
+                    attachmentFileName = comment.AttachmentFileName,
                 })),
             ct);
 
@@ -135,8 +202,34 @@ public class CreateCommentHandler(
             comment.AuthorEmail,
             authorPortraitUrl,
             comment.Body,
+            comment.AttachmentFileName,
+            comment.AttachmentContentType,
+            comment.AttachmentSizeBytes,
+            comment.AttachmentBlobUrl,
             comment.CreatedAt);
 
         await SendAsync(dto, StatusCodes.Status201Created, ct);
     }
+
+    private static bool IsInlineAttachmentContentType(string contentType)
+    {
+        return contentType.Trim().ToLowerInvariant() is "image/png" or "image/jpeg" or "image/jpg";
+    }
+
+    private static string NormalizeFileName(string? fileName, string contentType)
+    {
+        string extension = contentType.Trim().ToLowerInvariant() switch
+        {
+            "image/png" => ".png",
+            "image/jpeg" or "image/jpg" => ".jpg",
+            _ => string.Empty,
+        };
+        string normalized = Path.GetFileName(fileName ?? string.Empty).Trim();
+        if (string.IsNullOrWhiteSpace(normalized))
+        {
+            return $"comment-attachment{extension}";
+        }
+
+        return normalized.Length > 256 ? normalized[..256] : normalized;
+    }
 }