[backend/masto-api] Detect quotes on note create

Iceshrimp.Backend/Controllers/Mastodon/Renderers/NoteRenderer.cs

@@ -30,8 +30,12 @@ public class NoteRenderer(
 			? await RenderAsync(note.Renote, user, accounts, mentions, attachments, likeCounts, likedNotes, --recurse)
 			: null;
 		var text = note.Text;
-		if (quote != null && text != null && !text.EndsWith(quote.Url) && !text.EndsWith(quote.Uri))
-			text += $"\n\nRE: {quote.Url}"; //TODO: render as inline quote
+		if (note is { Renote: not null, IsQuote: true } && text != null)
+		{
+			var quoteUri = note.Renote?.Url ?? note.Renote?.Uri ?? note.Renote?.GetPublicUriOrNull(config.Value);
+			if (quoteUri != null)
+				text += $"\n\nRE: {quoteUri}"; //TODO: render as inline quote
+		}
 
 		var likeCount = likeCounts?.GetValueOrDefault(note.Id, 0) ?? await db.NoteLikes.CountAsync(p => p.Note == note);
 		var liked = likedNotes?.Contains(note.Id) ?? await db.NoteLikes.AnyAsync(p => p.Note == note && p.User == user);

Iceshrimp.Backend/Controllers/Mastodon/StatusController.cs

@@ -3,6 +3,7 @@ using Iceshrimp.Backend.Controllers.Mastodon.Attributes;
 using Iceshrimp.Backend.Controllers.Mastodon.Renderers;
 using Iceshrimp.Backend.Controllers.Mastodon.Schemas;
 using Iceshrimp.Backend.Controllers.Mastodon.Schemas.Entities;
+using Iceshrimp.Backend.Core.Configuration;
 using Iceshrimp.Backend.Core.Database;
 using Iceshrimp.Backend.Core.Extensions;
 using Iceshrimp.Backend.Core.Middleware;
@@ -12,6 +13,7 @@ using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.RateLimiting;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Caching.Distributed;
+using Microsoft.Extensions.Options;
 
 namespace Iceshrimp.Backend.Controllers.Mastodon;
 
@@ -25,7 +27,8 @@ public class StatusController(
 	DatabaseContext db,
 	NoteRenderer noteRenderer,
 	NoteService noteSvc,
-	IDistributedCache cache
+	IDistributedCache cache,
+	IOptions<Config.InstanceSection> config
 ) : ControllerBase
 {
 	[HttpGet("{id}")]
@@ -67,6 +70,7 @@ public class StatusController(
 		                        .RenderAllForMastodonAsync(noteRenderer, user);
 
 		var descendants = await db.NoteDescendants(id, maxDepth, maxDescendants)
+		                          .Where(p => !p.IsQuote || p.RenoteId != id)
 		                          .IncludeCommonProperties()
 		                          .EnsureVisibleFor(user)
 		                          .PrecomputeVisibilities(user)
@@ -166,8 +170,19 @@ public class StatusController(
 			? await db.DriveFiles.Where(p => request.MediaIds.Contains(p.Id)).ToListAsync()
 			: null;
 
-		var note = await noteSvc.CreateNoteAsync(user, visibility, request.Text, request.Cw, reply,
-		                                         attachments: attachments);
+		var lastToken = request.Text?.Split(' ').LastOrDefault();
+		var quoteUri  = lastToken?.StartsWith("https://") ?? false ? lastToken : null;
+		var quote = lastToken?.StartsWith($"https://{config.Value.WebDomain}/notes/") ?? false
+			? await db.Notes.IncludeCommonProperties()
+			          .FirstOrDefaultAsync(p => p.Id ==
+			                                    lastToken.Substring($"https://{config.Value.WebDomain}/notes/".Length))
+			: await db.Notes.IncludeCommonProperties()
+			          .FirstOrDefaultAsync(p => p.Uri == quoteUri || p.Url == quoteUri);
+
+		if (quote != null && quoteUri != null && request.Text != null)
+			request.Text = request.Text[..(request.Text.Length - quoteUri.Length - 1)];
+
+		var note = await noteSvc.CreateNoteAsync(user, visibility, request.Text, request.Cw, reply, quote, attachments);
 
 		if (idempotencyKey != null)
 			await cache.SetAsync($"idempotency:{idempotencyKey}", note.Id, TimeSpan.FromHours(24));

Iceshrimp.Backend/Core/Database/Tables/Note.cs

@@ -238,8 +238,11 @@ public class Note : IEntity
 	[InverseProperty(nameof(InverseReply))]
 	public virtual Note? Reply { get; set; }
 
-	[NotMapped] [Projectable] public bool IsPureRenote => RenoteId != null && !IsQuote;
-	[NotMapped] [Projectable] public bool IsQuote => RenoteId != null && (Text != null || HasPoll || FileIds.Count > 0);
+	[NotMapped] [Projectable] public bool IsPureRenote => (RenoteId != null || Renote != null) && !IsQuote;
+
+	[NotMapped]
+	[Projectable]
+	public bool IsQuote => (RenoteId != null || Renote != null) && (Text != null || HasPoll || FileIds.Count > 0);
 
 	[ForeignKey("UserId")]
 	[InverseProperty(nameof(Tables.User.Notes))]
@@ -285,6 +288,10 @@ public class Note : IEntity
 		? $"https://{config.WebDomain}/notes/{Id}"
 		: throw new Exception("Cannot access PublicUri for remote note");
 
+	public string? GetPublicUriOrNull(Config.InstanceSection config) => UserHost == null
+		? $"https://{config.WebDomain}/notes/{Id}"
+		: null;
+
 	public class MentionedUser
 	{
 		[J("uri")]      public required string  Uri      { get; set; }

Iceshrimp.Backend/Core/Federation/ActivityPub/NoteRenderer.cs

@@ -80,6 +80,9 @@ public class NoteRenderer(IOptions<Config.InstanceSection> config, MfmConverter
 			          .ToListAsync()
 			: null;
 
+		var quoteUri = note.IsQuote ? note.Renote?.Uri ?? note.Renote?.GetPublicUriOrNull(config.Value) : null;
+		var text     = quoteUri != null ? note.Text + $"\n\nRE: {quoteUri}" : note.Text;
+
 		return new ASNote
 		{
 			Id           = id,
@@ -93,13 +96,15 @@ public class NoteRenderer(IOptions<Config.InstanceSection> config, MfmConverter
 			To           = to,
 			Tags         = tags,
 			Attachments  = attachments,
-			Content = note.Text != null
-				? await mfmConverter.ToHtmlAsync(note.Text, mentions, note.UserHost)
-				: null,
-			Summary = note.Cw,
-			Source = note.Text != null
-				? new ASNoteSource { Content = note.Text, MediaType = "text/x.misskeymarkdown" }
-				: null
+			Content      = text != null ? await mfmConverter.ToHtmlAsync(text, mentions, note.UserHost) : null,
+			Summary      = note.Cw,
+			Source =
+				text != null
+					? new ASNoteSource { Content = text, MediaType = "text/x.misskeymarkdown" }
+					: null,
+			MkQuote  = quoteUri,
+			QuoteUri = quoteUri,
+			QuoteUrl = quoteUri
 		};
 	}
 }

Iceshrimp.Backend/Core/Services/NotificationService.cs

@@ -184,6 +184,7 @@ public class NotificationService(
 	public async Task GenerateRenoteNotification(Note note)
 	{
 		if (note.Renote is not { UserHost: null }) return;
+		if (note.RenoteUserId == note.UserId) return;
 		if (!note.VisibilityIsPublicOrHome &&
 		    !await db.Notes.AnyAsync(p => p.Id == note.Id && p.IsVisibleFor(note.Renote.User)))
 			return;