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using System.Collections.Concurrent;
using System.Collections.ObjectModel;
using System.Text.Json.Nodes;
using ArcaneLibs;
using LibMatrix;
using LibMatrix.EventTypes.Spec.State;
using LibMatrix.EventTypes.Spec.State.RoomInfo;
using LibMatrix.Homeservers;
using LibMatrix.RoomTypes;
namespace MatrixUtils.Abstractions;
public class RoomInfo : NotifyPropertyChanged {
public RoomInfo(GenericRoom room) {
Room = room;
_fallbackIcon = identiconGenerator.GenerateAsDataUri(room.RoomId);
RegisterEventListener();
}
public RoomInfo(GenericRoom room, List<StateEventResponse>? stateEvents) {
Room = room;
_fallbackIcon = identiconGenerator.GenerateAsDataUri(room.RoomId);
if (stateEvents is { Count: > 0 }) StateEvents = new(stateEvents!);
RegisterEventListener();
ProcessNewItems(stateEvents!);
}
public readonly GenericRoom Room;
public ObservableCollection<StateEventResponse?> StateEvents { get; private set; } = new();
private static ConcurrentBag<AuthenticatedHomeserverGeneric> homeserversWithoutEventFormatSupport = new();
private static SvgIdenticonGenerator identiconGenerator = new();
public async Task<StateEventResponse?> GetStateEvent(string type, string stateKey = "") {
if (homeserversWithoutEventFormatSupport.Contains(Room.Homeserver)) return await GetStateEventForged(type, stateKey);
var @event = StateEvents.FirstOrDefault(x => x?.Type == type && x.StateKey == stateKey);
if (@event is not null) return @event;
try {
@event = await Room.GetStateEventOrNullAsync(type, stateKey);
StateEvents.Add(@event);
}
catch (Exception e) {
if (e is InvalidDataException) {
homeserversWithoutEventFormatSupport.Add(Room.Homeserver);
return await GetStateEventForged(type, stateKey);
}
Console.Error.WriteLine(e);
await Task.Delay(1000);
return await GetStateEvent(type, stateKey);
}
return @event;
}
private async Task<StateEventResponse?> GetStateEventForged(string type, string stateKey = "") {
var @event = new StateEventResponse {
RoomId = Room.RoomId,
Type = type,
StateKey = stateKey,
Sender = null, //TODO implement
EventId = null
};
try {
@event.RawContent = await Room.GetStateAsync<JsonObject>(type, stateKey);
}
catch (MatrixException e) {
if (e is { ErrorCode: "M_NOT_FOUND" }) {
if (type == "m.room.name")
@event = new() {
Type = type,
StateKey = stateKey,
TypedContent = new RoomNameEventContent() {
Name = await Room.GetNameOrFallbackAsync()
},
//TODO implement
RoomId = null,
Sender = null,
EventId = null
};
else
@event.RawContent = default!;
}
else {
throw;
}
}
catch (Exception e) {
await Task.Delay(1000);
return await GetStateEvent(type, stateKey);
}
return @event;
}
public string? RoomIcon {
get => _roomIcon ?? _fallbackIcon;
set => SetField(ref _roomIcon, value);
}
public string? RoomName {
get => _roomName ?? DefaultRoomName ?? Room.RoomId;
set => SetField(ref _roomName, value);
}
public RoomCreateEventContent? CreationEventContent {
get => _creationEventContent;
set => SetField(ref _creationEventContent, value);
}
private string? _roomCreator;
public string? RoomCreator {
get => _roomCreator;
set => SetField(ref _roomCreator, value);
}
private string? _roomIcon;
private readonly string _fallbackIcon;
private string? _roomName;
private RoomCreateEventContent? _creationEventContent;
private string? _overrideRoomType;
private string? _defaultRoomName;
private RoomMemberEventContent? _ownMembership;
public string? DefaultRoomName {
get => _defaultRoomName;
set {
if (SetField(ref _defaultRoomName, value)) OnPropertyChanged(nameof(RoomName));
}
}
public string? OverrideRoomType {
get => _overrideRoomType;
set {
if (SetField(ref _overrideRoomType, value)) OnPropertyChanged(nameof(RoomType));
}
}
public string? RoomType => OverrideRoomType ?? CreationEventContent?.Type;
public RoomMemberEventContent? OwnMembership {
get => _ownMembership;
set => SetField(ref _ownMembership, value);
}
private void RegisterEventListener() {
StateEvents.CollectionChanged += (_, args) => {
if (args.NewItems is { Count: > 0 })
ProcessNewItems(args.NewItems.OfType<StateEventResponse>());
};
}
private void ProcessNewItems(IEnumerable<StateEventResponse?> newItems) {
foreach (StateEventResponse? newState in newItems) {
if (newState is null) continue;
// TODO: Benchmark switch statement
if(newState.StateKey != "") continue;
if (newState.Type == RoomNameEventContent.EventId && newState.TypedContent is RoomNameEventContent roomNameContent)
RoomName = roomNameContent.Name;
else if (newState is { Type: RoomAvatarEventContent.EventId, TypedContent: RoomAvatarEventContent roomAvatarContent })
RoomIcon = roomAvatarContent.Url;
else if (newState is { Type: RoomCreateEventContent.EventId, TypedContent: RoomCreateEventContent roomCreateContent }) {
CreationEventContent = roomCreateContent;
RoomCreator = newState.Sender;
}
}
}
public async Task FetchAllStateAsync() {
var stateEvents = Room.GetFullStateAsync();
await foreach (var stateEvent in stateEvents) {
StateEvents.Add(stateEvent);
}
}
}
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