Added lastactive command to get the last time BossmanJack did something observed by the bot

KfChatDotNetBot/Commands/UtilityCommands.cs

@@ -1,7 +1,11 @@
 using System.Reflection;
 using System.Text.RegularExpressions;
+using Humanizer;
+using Humanizer.Localisation;
+using KfChatDotNetBot.Extensions;
 using KfChatDotNetBot.Models;
 using KfChatDotNetBot.Models.DbModels;
+using KfChatDotNetBot.Settings;
 using KfChatDotNetWsClient.Models.Events;
 
 namespace KfChatDotNetBot.Commands;
@@ -62,4 +66,35 @@ public class GetVersionCommand : ICommand
         }
         await botInstance.SendChatMessageAsync($"Bot compiled against {version.Split('+')[1]}", true);
     }
+}
+
+public class GetLastActivity : ICommand
+{
+    public List<Regex> Patterns => [
+        new Regex("^lastactivity", RegexOptions.IgnoreCase)
+    ];
+
+    public string? HelpText => "When was Bossman last active?";
+    public UserRight RequiredRight => UserRight.Loser;
+    public TimeSpan Timeout => TimeSpan.FromSeconds(10);
+    public RateLimitOptionsModel? RateLimitOptions => new RateLimitOptionsModel
+    {
+        MaxInvocations = 3,
+        Window = TimeSpan.FromSeconds(10)
+    };
+    public async Task RunCommand(ChatBot botInstance, MessageModel message, UserDbModel user, GroupCollection arguments, CancellationToken ctx)
+    {
+        var lastActive = await SettingsProvider.GetValueAsync(BuiltIn.Keys.BossmanLastSighting);
+        if (lastActive.Value == null)
+        {
+            await botInstance.SendChatMessageAsync($"{user.FormatUsername()}, I don't know.", true);
+            return;
+        }
+
+        var activity = lastActive.JsonDeserialize<LastSightingModel>();
+        var elapsed = DateTimeOffset.UtcNow - activity!.When;
+        await botInstance.SendChatMessageAsync(
+            $"{user.FormatUsername()}, BossmanJack was last seen {elapsed.Humanize(maxUnit: TimeUnit.Day, minUnit: TimeUnit.Second, precision: 2)} {activity.Activity}",
+            true);
+    }
 }