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using System.Runtime.CompilerServices;
using System.Runtime.InteropServices;
using System.Text;
using System.Text.Json;
using System.Text.Json.Serialization;
using ArcaneLibs.Extensions;
using Microsoft.AspNetCore.Mvc;
using Microsoft.EntityFrameworkCore;
using Spacebar.DataMappings.Generic;
using Spacebar.GatewayOffload.Extensions.Db;
using Spacebar.Interop.Authentication.AspNetCore;
using Spacebar.Interop.Replication.Abstractions;
using Spacebar.Models.Db.Contexts;
using Spacebar.Models.Gateway;
using Spacebar.Models.Generic;
using Spacebar.Models.Generic.Constants;
using Spacebar.Offload.Extensions;
namespace Spacebar.GatewayOffload.Controllers;
[ApiController]
[Route("/_spacebar/offload/gateway/LazyRequest")]
public class Op14Controller(ILogger<Op12Controller> logger, SpacebarAspNetAuthenticationService authService, SpacebarDbContext db, IServiceProvider sp) : ControllerBase
{
[HttpPost]
// TODO: actually return something?
public async IAsyncEnumerable<ContentlessReplicationMessage> DoLazyRequest([FromBody] LazyRequest payload)
{
var user = await TraceResult.TraceAsync("getAuthUser", () => authService.GetCurrentUserAsync(Request));
var session = await TraceResult.TraceAsync("getAuthSession", () => authService.GetCurrentSessionAsync(Request));
if (!await db.Members.AsNoTracking().AnyAsync(m => m.GuildId == payload.GuildId && m.Id == user.Result.Id))
{
logger.LogWarning("User {user} requested lazy member list for guild {guildId}, but is not a member", user.Result.Id, payload.GuildId);
yield break;
}
if (payload.Channels.Count == 0)
{
logger.LogWarning("User {user} requested lazy member list for guild {guildId}, but did not request a channel range", user.Result.Tag, payload.GuildId);
yield break;
}
var memberList = await GetGuildMemberListAsync(db, payload.GuildId);
foreach (var (cid, ranges) in payload.Channels)
foreach (var range in ranges)
yield return new ReplicationMessage<GuildMemberListUpdate>()
{
UserId = user.Result.Id,
Event = GuildMemberListUpdate.EventId,
Origin = "Offload/LazyRequest",
CreatedAt = DateTime.UtcNow,
Payload = new GuildMemberListUpdate()
{
GuildId = payload.GuildId,
// this doesnt appear to work currently, skip it
ListId = "everyone", // await GetMemberListIdAsync(db, guildId: payload.GuildId, channelId: long.Parse(cid)),
OnlineCount = memberList.TakeWhile(x => x is not GuildMemberListSyncItem.RoleEntry { Group.Id: "offline" }).Count(),
MemberCount = await db.Members.CountAsync(x => x.GuildId == payload.GuildId),
Operations =
[
new GuildMemberListUpdateOperation.SyncOperation()
{
Operation = GuildMemberListUpdateOperationType.Sync,
Items = memberList.Skip(range[0]).Take(range[1]).ToList(),
Range = [range[0], Math.Min(range[1], memberList.Count)]
}
],
Groups = memberList.OfType<GuildMemberListSyncItem.RoleEntry>().Select(x => x.Group).ToList()
}
// TODO: send presence updates
// TODO: handle subscriptions
// TODO: handle channel permissions
// TODO: handle channels at all
// TODO: reduce the amount of duplicate User objects sent?
};
}
private async Task<string?> GetMemberListIdAsync(SpacebarDbContext db, long guildId, long channelId)
{
var channel = await db.Channels.AsNoTracking().FirstOrDefaultAsync(c => c.Id == channelId && c.GuildId == guildId);
if (channel == null) return null;
if (string.IsNullOrWhiteSpace(channel.PermissionOverwrites) || channel.PermissionOverwrites == "[]")
{
return "everyone";
}
List<string> perms = [];
foreach (var overwrite in channel.MappedPermissionOverwrites)
{
if (((Permissions)overwrite.Allow).HasFlag(Permissions.ViewChannel)) perms.Add($"allow:{overwrite}");
else if (((Permissions)overwrite.Deny).HasFlag(Permissions.ViewChannel)) perms.Add($"deny:{overwrite}");
}
perms.Sort();
ReadOnlySpan<byte> hashData = Encoding.UTF8.GetBytes(string.Join(",", perms));
var hashResult = MurmurHash3.Hash32(ref hashData);
return hashResult.ToString();
}
private async Task<List<GuildMemberListSyncItem>> GetGuildMemberListAsync(SpacebarDbContext db, long guildId)
{
var memberList = new List<GuildMemberListSyncItem>();
// Fetch hoisted roles for the guild to define groups
var hoistedRoles = await db.Roles
.AsNoTracking()
.Where(r => r.GuildId == guildId && r.Hoist)
.OrderByDescending(r => r.Position)
// .Select(r => r.Id)
.ToListAsync();
logger.LogDebug("Got hoisted roles: {roleIds}", hoistedRoles.Select(x => x.Id).ToList());
List<long> handledRoles = [];
var baseMembersQry = db.Members.AsNoTracking()
.Include(x => x.IdNavigation)
.ThenInclude(x => x.Sessions.Where(s => s.Status != "offline" && s.Status != "invisible" && s.Status != "unknown"))
.Include(x => x.Roles)
.OrderBy(x => x.Nick ?? x.IdNavigation.Username)
.Where(x=>x.GuildId == guildId);
foreach (var roleObj in hoistedRoles)
{
var role = roleObj.Id;
var members = await baseMembersQry
.Where(x =>
x.Roles.Any(r => r.Id == role)
&& !x.Roles.Any(r => handledRoles.Contains(r.Id))
// and finally, filter by online
&& x.IdNavigation.Sessions.Any(s => s.Status != "offline" && s.Status != "invisible" && s.Status != "unknown")
).ToListAsync();
logger.LogInformation("Got {count} potential members for group {group} ({groupName}): {members}",
members.Count, role, roleObj.Name, string.Join(", ", members.Take(10).Select(x => $"{x.Id} {x.Nick ?? x.IdNavigation.Tag}"))
);
if (members.Count > 0)
{
memberList.Add(new GuildMemberListSyncItem.RoleEntry() { Group = new() { Id = role.ToString(), Count = members.Count } });
memberList.AddRange(members.Select(m => new GuildMemberListSyncItem.MemberEntry() { Member = m.ToPublicMemberWithPresence() }));
}
handledRoles.Add(role);
}
// online members
var onlineMembers = await baseMembersQry
.Where(x =>
!x.Roles.Any(r => handledRoles.Contains(r.Id))
// and finally, filter by online
&& x.IdNavigation.Sessions.Any(s => s.Status != "offline" && s.Status != "invisible" && s.Status != "unknown")
).ToListAsync();
logger.LogInformation("Got {count} potential members for group {group} ({groupName}): {members}",
onlineMembers.Count, "online", "online", string.Join(", ", onlineMembers.Take(10).Select(x => $"{x.Id} {x.Nick ?? x.IdNavigation.Tag}"))
);
if (onlineMembers.Count > 0)
{
memberList.Add(new GuildMemberListSyncItem.RoleEntry() { Group = new() { Id = "online", Count = onlineMembers.Count } });
memberList.AddRange(onlineMembers.Select(m => new GuildMemberListSyncItem.MemberEntry() { Member = m.ToPublicMemberWithPresence() }));
}
if (memberList.Count < 2000)
{
logger.LogInformation("Less than 2000 members, including offline members...");
var offlineMembers = await baseMembersQry
.Where(x =>
!x.Roles.Any(r => handledRoles.Contains(r.Id))
// and finally, filter by online
&& (x.IdNavigation.Sessions.All(s => s.Status == "offline" || s.Status == "invisible" || s.Status == "unknown") || !x.IdNavigation.Sessions.Any())
).ToListAsync();
logger.LogInformation("Got {count} potential members for group {group} ({groupName}): {members}",
offlineMembers.Count, "offline", "offline", string.Join(", ", offlineMembers.Take(10).Select(x => $"{x.Id} {x.Nick ?? x.IdNavigation.Tag}"))
);
if (offlineMembers.Count > 0)
{
memberList.Add(new GuildMemberListSyncItem.RoleEntry()
{
Group = new() { Id = "offline", Count = offlineMembers.Count }
});
memberList.AddRange(offlineMembers.Select(m => new GuildMemberListSyncItem.MemberEntry() { Member = m.ToPublicMemberWithPresence() }));
}
}
logger.LogInformation("Got member list with {count} total nodes", memberList.Count);
return memberList;
}
}
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