feat(files): add per-channel storage quota [CI]

server/src/WebDrop.Core/ChannelService.cs

@@ -245,14 +245,16 @@ public sealed partial class ChannelService(
         if (!outcome.Result.Created) DeleteBlobIfUnreferenced(blobKey);
         foreach (string prefix in outcome.BlobPrefixesToDelete) blobs.DeletePrefix(prefix);
         events.Advanced(channelId, outcome.LastSeq);
+        if (outcome.NotifySettings) events.SettingsChanged(channelId);
         return outcome.Result;
     }
 
-    private sealed class AppendOutcome(AppendResult result, long lastSeq, List<string> prefixes)
+    private sealed class AppendOutcome(AppendResult result, long lastSeq, List<string> prefixes, bool notifySettings = false)
     {
         public AppendResult Result { get; } = result;
         public long LastSeq { get; } = lastSeq;
         public List<string> BlobPrefixesToDelete { get; } = prefixes;
+        public bool NotifySettings { get; } = notifySettings;
     }
 
     private AppendOutcome AppendInTx(
@@ -272,6 +274,10 @@ public sealed partial class ChannelService(
         var item = tx.GetItem(channelId, env.ItemId);
         var crypto = tx.GetWorkspaceCrypto(channelId);
         var objectEnvelope = crypto.Objects.Find(o => o.ItemId == env.ItemId.ToBase64Url());
+        var workspaceState = objectEnvelope is null ? null : tx.GetWorkspace(channelId);
+        var workspaceChannel = objectEnvelope is null ? null : workspaceState?.Channels.Find(c => c.Id == objectEnvelope.ChannelId);
+        if (objectEnvelope is not null && workspaceChannel is null) throw new WebDropException(ErrorCode.BadRequest);
+        bool countsTowardFileQuota = objectEnvelope?.Domain == CryptoDomain.Files && !env.IsControl;
         if (signedEvent is not null && (objectEnvelope is null || !env.IsFinal)) throw new WebDropException(ErrorCode.BadRequest);
         if (objectEnvelope is not null && env.IsFinal)
         {
@@ -336,7 +342,11 @@ public sealed partial class ChannelService(
             if (item.MaxIndex > env.FrameIndex) throw new WebDropException(ErrorCode.BadRequest);
             if (item.FinalIndex is { } f && f != env.FrameIndex) throw new WebDropException(ErrorCode.BadRequest);
         }
-        if (channel.Bytes + body.Length > limits.MaxChannelBytes) throw new WebDropException(ErrorCode.TooLarge);
+        if (objectEnvelope is null && channel.Bytes + body.Length > limits.MaxChannelBytes
+            || objectEnvelope is not null && channel.Bytes + body.Length > limits.MaxWorkspaceBytes)
+            throw new WebDropException(ErrorCode.TooLarge);
+        if (countsTowardFileQuota && workspaceChannel!.FileBytes + body.Length > limits.MaxWorkspaceChannelBytes)
+            throw new WebDropException(ErrorCode.TooLarge);
 
         long seq = tx.NextSeq(channelId);
         tx.InsertFrame(new StoredFrame(channelId, env.ItemId, env.FrameIndex, seq, body.Length, digest,
@@ -391,7 +401,16 @@ public sealed partial class ChannelService(
             if (pruned > channel.CompactedThrough) tx.SetCompactedThrough(channelId, pruned);
         }
 
-        return new AppendOutcome(new AppendResult { Seq = seq, Created = true }, lastSeq, prefixes);
+        if (countsTowardFileQuota)
+        {
+            var latestWorkspace = tx.GetWorkspace(channelId) ?? throw new WebDropException(ErrorCode.NotFound);
+            var latestChannel = latestWorkspace.Channels.Find(c => c.Id == objectEnvelope!.ChannelId) ?? throw new WebDropException(ErrorCode.NotFound);
+            latestChannel.FileBytes += body.Length;
+            tx.PutWorkspace(channelId, latestWorkspace);
+        }
+
+        return new AppendOutcome(new AppendResult { Seq = seq, Created = true }, lastSeq, prefixes,
+            countsTowardFileQuota && env.IsFinal);
     }
 
     private static AppendResult Resolve(StoredFrame existing, byte[] digest) =>
@@ -587,10 +606,23 @@ public sealed partial class ChannelService(
         });
         foreach (string prefix in prefixes) blobs.DeletePrefix(prefix);
         events.Advanced(id, seq);
+        events.SettingsChanged(id);
     }
 
     private long DeleteItemCore(IResourceTx tx, Id16 channelId, Item item, TombstoneReason reason, List<string> prefixes)
     {
+        var crypto = tx.GetWorkspaceCrypto(channelId);
+        var objectEnvelope = crypto.Objects.Find(o => o.ItemId == item.ItemId.ToBase64Url());
+        if (objectEnvelope?.Domain == CryptoDomain.Files && (item.Flags & FrameFlags.Control) == 0)
+        {
+            var workspace = tx.GetWorkspace(channelId);
+            var workspaceChannel = workspace?.Channels.Find(c => c.Id == objectEnvelope.ChannelId);
+            if (workspace is not null && workspaceChannel is not null)
+            {
+                workspaceChannel.FileBytes = Math.Max(0, workspaceChannel.FileBytes - item.Bytes);
+                tx.PutWorkspace(channelId, workspace);
+            }
+        }
         tx.DeleteItemRows(channelId, item.ItemId);
         tx.AddChannelBytes(channelId, -item.Bytes);
         long seq = tx.NextSeq(channelId);

server/src/WebDrop.Core/ChannelWorkspace.cs

@@ -27,6 +27,11 @@ public sealed partial class ChannelService
             var grants = crypto.Access.Where(a => a.Username == principal.AccountName).ToList();
             var ids = grants.Where(a => a.ChatRead || a.FilesRead).Select(a => a.ChannelId).ToHashSet();
             state.Channels.RemoveAll(c => !ids.Contains(c.Id));
+            foreach (var workspaceChannel in state.Channels)
+            {
+                var grant = grants.Find(a => a.ChannelId == workspaceChannel.Id);
+                if (grant is null || !grant.FilesRead && !grant.FilesUpload) workspaceChannel.FileBytes = 0;
+            }
             state.Folders.RemoveAll(f => !ids.Contains(f.ThreadId));
             state.Locations.RemoveAll(l => !Id16.TryParse(l.ItemId, out var itemId) || !CanReadObject(tx, space, principal, itemId));
         }

server/src/WebDrop.Core/Settings.cs

@@ -8,6 +8,8 @@ public sealed class ServerLimits
     public int MaxPayloadBytes { get; set; } = (1 << 20) + 16;
     public int MaxFramesPerItem { get; set; } = 65_536;
     public long MaxChannelBytes { get; set; } = 1L << 30;
+    public long MaxWorkspaceBytes { get; set; } = 1L << 40;
+    public long MaxWorkspaceChannelBytes { get; set; } = 10L << 30;
     /// <summary>最大账号成员数。属性名和 info 字段保持旧线格式兼容。</summary>
     public int MaxSeats { get; set; } = 64;
     public int MaxVisitors { get; set; } = 10_000;

server/src/WebDrop.Core/Workspace.cs

@@ -8,6 +8,7 @@ public sealed class WorkspaceChannel
     [JsonPropertyName("filesEpoch")] public int FilesEpoch { get; set; }
     [JsonPropertyName("chatHistory")] public bool ChatHistory { get; set; } = true;
     [JsonPropertyName("filesHistory")] public bool FilesHistory { get; set; } = true;
+    [JsonPropertyName("fileBytes")] public long FileBytes { get; set; }
     [JsonPropertyName("id")] public required string Id { get; init; }
     [JsonPropertyName("name")] public required string Name { get; set; }
     [JsonPropertyName("createdAt")] public required long CreatedAt { get; init; }