Lightfinder-profiles

Reviewed-on: #18

LightlessSyncServer/LightlessSyncServer/Hubs/LightlessHub.User.cs

@@ -523,6 +523,52 @@ public partial class LightlessHub
         }
     }
 
+    private async Task<(BroadcastRedisEntry? Entry, TimeSpan? Expiry)> TryGetBroadcastEntryAsync(string hashedCid)
+    {
+        var key = _broadcastConfiguration.BuildRedisKey(hashedCid);
+        RedisValueWithExpiry value;
+
+        try
+        {
+            value = await _redis.Database.StringGetWithExpiryAsync(key).ConfigureAwait(false);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LightfinderProfileLookupFailed", "CID", hashedCid, "Error", ex));
+            return (null, null);
+        }
+
+        if (value.Value.IsNullOrEmpty || value.Expiry is null || value.Expiry <= TimeSpan.Zero)
+        {
+            return (null, value.Expiry);
+        }
+
+        BroadcastRedisEntry? entry;
+        try
+        {
+            entry = JsonSerializer.Deserialize<BroadcastRedisEntry>(value.Value!);
+        }
+        catch (Exception ex)
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LightfinderProfileDeserializeFailed", "CID", hashedCid, "Raw", value.Value.ToString(), "Error", ex));
+            return (null, value.Expiry);
+        }
+
+        if (entry is null || !string.Equals(entry.HashedCID, hashedCid, StringComparison.Ordinal))
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LightfinderProfileEntryMismatch", "CID", hashedCid, "EntryCID", entry?.HashedCID ?? "null"));
+            return (null, value.Expiry);
+        }
+
+        return (entry, value.Expiry);
+    }
+
+    private static bool HasActiveBroadcast(BroadcastRedisEntry? entry, TimeSpan? expiry) =>
+        entry?.HasOwner() == true && expiry.HasValue && expiry.Value > TimeSpan.Zero;
+
+    private static bool IsActiveBroadcastForUser(BroadcastRedisEntry? entry, TimeSpan? expiry, string userUid) =>
+        HasActiveBroadcast(entry, expiry) && entry!.OwnedBy(userUid);
+
     private static bool IsValidHashedCid(string? cid)
     {
         if (string.IsNullOrWhiteSpace(cid))
@@ -792,6 +838,97 @@ public partial class LightlessHub
         return new UserProfileDto(user.User, false, data.IsNSFW, data.Base64ProfileImage, data.UserDescription);
     }
 
+    [Authorize(Policy = "Identified")]
+    public async Task<UserProfileDto?> UserGetLightfinderProfile(string hashedCid)
+    {
+        _logger.LogCallInfo(LightlessHubLogger.Args("LightfinderProfile", hashedCid));
+
+        if (!_broadcastConfiguration.EnableBroadcasting)
+        {
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Error, "Lightfinder is currently disabled.").ConfigureAwait(false);
+            return null;
+        }
+
+        if (!IsValidHashedCid(hashedCid))
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LightfinderProfileInvalidCid", hashedCid));
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "Invalid Lightfinder target.").ConfigureAwait(false);
+            return null;
+        }
+
+        var viewerCid = UserCharaIdent;
+        if (!IsValidHashedCid(viewerCid))
+        {
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "You must be using Lightfinder to open player profiles.").ConfigureAwait(false);
+            return null;
+        }
+
+        var (viewerEntry, viewerExpiry) = await TryGetBroadcastEntryAsync(viewerCid).ConfigureAwait(false);
+        if (!IsActiveBroadcastForUser(viewerEntry, viewerExpiry, UserUID))
+        {
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "You must be using Lightfinder to open player profiles.").ConfigureAwait(false);
+            return null;
+        }
+
+        var (targetEntry, targetExpiry) = await TryGetBroadcastEntryAsync(hashedCid).ConfigureAwait(false);
+        if (!HasActiveBroadcast(targetEntry, targetExpiry))
+        {
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "That player is not currently using Lightfinder.").ConfigureAwait(false);
+            return null;
+        }
+
+        if (string.IsNullOrEmpty(targetEntry!.OwnerUID))
+        {
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "That player is not currently using Lightfinder.").ConfigureAwait(false);
+            return null;
+        }
+
+        var targetUser = await DbContext.Users.AsNoTracking()
+            .SingleOrDefaultAsync(u => u.UID == targetEntry.OwnerUID, cancellationToken: RequestAbortedToken)
+            .ConfigureAwait(false);
+
+        if (targetUser == null)
+        {
+            _logger.LogCallWarning(LightlessHubLogger.Args("LightfinderProfileMissingUser", hashedCid, "OwnerUID", targetEntry.OwnerUID));
+            await Clients.Caller.Client_ReceiveServerMessage(MessageSeverity.Warning, "Unable to load the players profile at this time.").ConfigureAwait(false);
+            return null;
+        }
+
+        var displayAlias = string.IsNullOrWhiteSpace(targetUser.Alias)
+            ? "LightfinderUser"
+            : targetUser.Alias;
+
+        var userData = new UserData(
+            UID: hashedCid,
+            Alias: displayAlias,
+            IsAdmin: false,
+            IsModerator: false,
+            HasVanity: false,
+            TextColorHex: targetUser.TextColorHex,
+            TextGlowColorHex: targetUser.TextGlowColorHex);
+
+        var profile = await DbContext.UserProfileData.AsNoTracking()
+            .SingleOrDefaultAsync(u => u.UserUID == targetEntry.OwnerUID, cancellationToken: RequestAbortedToken)
+            .ConfigureAwait(false);
+
+        if (profile == null)
+        {
+            return new UserProfileDto(userData, false, null, null, null);
+        }
+
+        if (profile.FlaggedForReport)
+        {
+            return new UserProfileDto(userData, true, null, null, "This profile is flagged for report and pending evaluation");
+        }
+
+        if (profile.ProfileDisabled)
+        {
+            return new UserProfileDto(userData, true, null, null, "This profile was permanently disabled");
+        }
+
+        return new UserProfileDto(userData, false, profile.IsNSFW, profile.Base64ProfileImage, profile.UserDescription);
+    }
+
     [Authorize(Policy = "Identified")]
     public async Task UserPushData(UserCharaDataMessageDto dto)
     {