Location Sharing (#49)

Authored-by: Tsubasahane <wozaiha@gmail.com>
Reviewed-on: #49
Co-authored-by: Tsubasa <tsubasa@noreply.git.lightless-sync.org>
Co-committed-by: Tsubasa <tsubasa@noreply.git.lightless-sync.org>

.gitignore

@@ -350,4 +350,7 @@ MigrationBackup/
 .ionide/
 
 # docker run data
-Docker/run/data/
+Docker/run/data/
+
+#idea files
+*.idea

LightlessSyncServer/LightlessSyncServer/Hubs/LightlessHub.ClientStubs.cs

@@ -40,5 +40,6 @@ namespace LightlessSyncServer.Hubs
         public Task Client_GposeLobbyPushPoseData(UserData userData, PoseData poseData) => throw new PlatformNotSupportedException("Calling clientside method on server not supported");
         public Task Client_GposeLobbyPushWorldData(UserData userData, WorldData worldData) => throw new PlatformNotSupportedException("Calling clientside method on server not supported");
         public Task Client_ChatReceive(ChatMessageDto message) => throw new PlatformNotSupportedException("Calling clientside method on server not supported");
+        public Task Client_SendLocationToClient(LocationDto locationDto, DateTimeOffset expireAt) => throw new PlatformNotSupportedException("Calling clientside method on server not supported");
     }
 }

LightlessSyncServer/LightlessSyncServer/Hubs/LightlessHub.User.cs

@@ -12,8 +12,6 @@ using LightlessSyncShared.Utils;
 using Microsoft.AspNetCore.Authorization;
 using Microsoft.AspNetCore.SignalR;
 using Microsoft.EntityFrameworkCore;
-using SixLabors.ImageSharp;
-using SixLabors.ImageSharp.PixelFormats;
 using StackExchange.Redis;
 using System.Text;
 using System.Text.Json;
@@ -1232,6 +1230,120 @@ public partial class LightlessHub
         errorMessage = string.Empty;
         return true;
     }
+    
+    [Authorize(Policy = "Identified")]
+    public async Task UpdateLocation(LocationDto dto, bool offline = false)
+    {
+        _logger.LogCallInfo(LightlessHubLogger.Args(UserUID,dto));
+        if (string.IsNullOrEmpty(dto.User.UID))
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LocationDto with no userinfo :",UserUID, dto));
+            return;
+        }
+
+        if (!string.Equals(UserUID, dto.User.UID, StringComparison.Ordinal))
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LocationDto with another UID :",UserUID, dto));
+            return;
+        }
+        var key = $"Location:{UserUID}";
+        
+        if (offline)
+        {
+            var allUsers = await GetSharingUsers().ConfigureAwait(false);   
+            await _redis.RemoveAsync(key, CommandFlags.FireAndForget).ConfigureAwait(false);
+            await Clients.Users(allUsers.Keys).Client_SendLocationToClient(dto, DateTimeOffset.MinValue).ConfigureAwait(false);
+        }
+        else
+        {
+            var currentLocation = await _redis.GetAsync<LocationDto>(key).ConfigureAwait(false);
+            if (currentLocation != dto)
+            {
+                var allUsers = await GetSharingUsers().ConfigureAwait(false);   
+                await _redis.AddAsync(key, dto).ConfigureAwait(false);
+                var sendTasks = allUsers.Select(pair => Clients.User(pair.Key).Client_SendLocationToClient(dto, pair.Value));
+                await Task.WhenAll(sendTasks).ConfigureAwait(false);
+            }
+        }
+    }
+    
+    private async Task<Dictionary<string, DateTimeOffset>> GetSharingUsers()
+    {
+        return await DbContext.Permissions.AsNoTracking()
+            .Where(x => x.UserUID == UserUID && x.ShareLocationUntil > DateTimeOffset.UtcNow)
+            .ToDictionaryAsync(x => x.OtherUserUID, x => x.ShareLocationUntil, RequestAbortedToken)
+            .ConfigureAwait(false);
+    }
+
+    [Authorize(Policy = "Identified")]
+    public async Task<(List<LocationWithTimeDto>, List<SharingStatusDto>)> RequestAllLocationInfo()
+    {
+        _logger.LogCallInfo();
+        var locationWithTime = await GetLocationWithTime().ConfigureAwait(false);
+        var sharingStatus = await GetSharingStatus().ConfigureAwait(false);
+        return (locationWithTime, sharingStatus);
+    }
+
+    private async Task<List<LocationWithTimeDto>> GetLocationWithTime()
+    {
+        var dictionary = await DbContext.Permissions.AsNoTracking()
+            .Where(x => x.OtherUserUID == UserUID && x.ShareLocationUntil > DateTimeOffset.UtcNow)
+            .ToDictionaryAsync(x => x.UserUID, x => x.ShareLocationUntil, cancellationToken: RequestAbortedToken)
+            .ConfigureAwait(false);
+        if (dictionary.Count == 0)
+        {
+            return [];
+        }
+
+        var redisKeys = dictionary.Keys.Select(uid => $"Location:{uid}").ToHashSet(StringComparer.Ordinal);
+        var data = await _redis.GetAllAsync<LocationDto>(redisKeys).ConfigureAwait(false);
+        var result = new List<LocationWithTimeDto>();
+
+        foreach (var (userUid, expireAt) in dictionary)
+        {
+            var redisKey = $"Location:{userUid}";
+
+            if (data.TryGetValue(redisKey, out var locationDto) && locationDto is not null)
+            {
+                result.Add(new LocationWithTimeDto(locationDto, expireAt));
+            }
+        }
+        return result;
+    }
+
+    private async Task<List<SharingStatusDto>> GetSharingStatus()
+    {
+        return await DbContext.Permissions.AsNoTracking()
+            .Where(x => x.UserUID == UserUID && x.ShareLocationUntil > DateTimeOffset.UtcNow)
+            .Select(x => new SharingStatusDto(new UserData(x.OtherUserUID), x.ShareLocationUntil))
+            .ToListAsync(cancellationToken: RequestAbortedToken).ConfigureAwait(false);
+    }
+
+
+
+    [Authorize(Policy = "Identified")]
+    public async Task<bool> ToggleLocationSharing(LocationSharingToggleDto dto)
+    {
+        _logger.LogCallInfo(LightlessHubLogger.Args(UserUID,dto));
+        try
+        {
+            await DbContext.Permissions.Where(x => x.UserUID == UserUID && dto.users.Contains(x.OtherUserUID))
+                .ExecuteUpdateAsync(setter =>
+                        setter.SetProperty(x => x.ShareLocationUntil, dto.duration.ToUniversalTime()),
+                    cancellationToken: RequestAbortedToken).ConfigureAwait(false);
+
+            //update user's location for target users
+            var currentLocation = await _redis.GetAsync<LocationDto>($"Location:{UserUID}").ConfigureAwait(false);
+            await Clients.Users(dto.users).Client_SendLocationToClient(currentLocation, dto.duration.ToUniversalTime())
+                .ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogError(ex, "ToggleLocationSharing error:");
+            return false;
+        }
+        return true;
+    }
 
     [GeneratedRegex(@"^([a-z0-9_ '+&,\.\-\{\}]+\/)+([a-z0-9_ '+&,\.\-\{\}]+\.[a-z]{3,4})$", RegexOptions.IgnoreCase | RegexOptions.Compiled | RegexOptions.ECMAScript)]
     private static partial Regex GamePathRegex();

LightlessSyncServer/LightlessSyncServer/Hubs/LightlessHub.cs

@@ -16,6 +16,8 @@ using Microsoft.AspNetCore.SignalR;
 using Microsoft.EntityFrameworkCore;
 using StackExchange.Redis.Extensions.Core.Abstractions;
 using System.Collections.Concurrent;
+using LightlessSync.API.Dto.CharaData;
+using LightlessSync.API.Dto.User;
 using LightlessSyncServer.Services.Interfaces;
 
 namespace LightlessSyncServer.Hubs;
@@ -217,6 +219,8 @@ public partial class LightlessHub : Hub<ILightlessHub>, ILightlessHub
                 await RemoveUserFromRedis().ConfigureAwait(false);
 
                 _lightlessCensus.ClearStatistics(UserUID);
+                
+                await UpdateLocation(new LocationDto(new UserData(UserUID), new LocationInfo()), offline: true).ConfigureAwait(false);
 
                 await SendOfflineToAllPairedUsers().ConfigureAwait(false);
 

LightlessSyncServer/LightlessSyncShared/Migrations/20251229015535_ShareLocation.cs

@@ -0,0 +1,30 @@
+using System;
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace LightlessSyncServer.Migrations
+{
+    /// <inheritdoc />
+    public partial class ShareLocation : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.AddColumn<DateTimeOffset>(
+                name: "share_location_until",
+                table: "user_permission_sets",
+                type: "timestamp with time zone",
+                nullable: false,
+                defaultValue: new DateTimeOffset(new DateTime(1, 1, 1, 0, 0, 0, 0, DateTimeKind.Unspecified), new TimeSpan(0, 0, 0, 0, 0)));
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropColumn(
+                name: "share_location_until",
+                table: "user_permission_sets");
+        }
+    }
+}

LightlessSyncServer/LightlessSyncShared/Migrations/LightlessDbContextModelSnapshot.cs

@@ -941,6 +941,10 @@ namespace LightlessSyncServer.Migrations
                         .HasColumnType("boolean")
                         .HasColumnName("is_paused");
 
+                    b.Property<DateTimeOffset>("ShareLocationUntil")
+                        .HasColumnType("timestamp with time zone")
+                        .HasColumnName("share_location_until");
+
                     b.Property<bool>("Sticky")
                         .HasColumnType("boolean")
                         .HasColumnName("sticky");

LightlessSyncServer/LightlessSyncShared/Models/UserPermissionSet.cs

@@ -15,4 +15,5 @@ public class UserPermissionSet
     public bool DisableAnimations { get; set; } = false;
     public bool DisableVFX { get; set; } = false;
     public bool DisableSounds { get; set; } = false;
+    public DateTimeOffset ShareLocationUntil { get; set; } = DateTimeOffset.MinValue;
 }