Added ICoordinator for bots which arent' sharded (the ones which won't be using NadekoBot.Coordinator)

src/NadekoBot/Services/Impl/SingleProcessCoordinator.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Threading.Tasks;
+using Discord.WebSocket;
+using NadekoBot.Core.Services;
+using Serilog;
+
+namespace NadekoBot.Services
+{
+    public class SingleProcessCoordinator : ICoordinator
+    {
+        private readonly IBotCredentials _creds;
+        private readonly DiscordSocketClient _client;
+
+        public SingleProcessCoordinator(IBotCredentials creds, DiscordSocketClient client)
+        {
+            _creds = creds;
+            _client = client;
+        }
+        public bool RestartBot()
+        {
+            if (string.IsNullOrWhiteSpace(_creds.RestartCommand?.Cmd)
+                || string.IsNullOrWhiteSpace(_creds.RestartCommand?.Args))
+            {
+                Log.Error("You must set RestartCommand.Cmd and RestartCommand.Args in credentials.json");
+                return false;
+            }
+            
+            Process.Start(_creds.RestartCommand.Cmd, _creds.RestartCommand.Args);
+            _ = Task.Run(async () =>
+            {
+                await Task.Delay(2000);
+                Die();
+            });
+            return true;
+        }
+
+        public void Die()
+        {
+            Environment.Exit(5);
+        }
+
+        public bool RestartShard(int shardId)
+        {
+            return RestartBot();
+        }
+
+        public IList<ShardStatus> GetAllShardStatuses()
+        {
+            return new[]
+            {
+                new ShardStatus()
+                {
+                    ConnectionState = _client.ConnectionState,
+                    GuildCount = _client.Guilds.Count,
+                    LastUpdate = DateTime.UtcNow,
+                    ShardId = _client.ShardId
+                }
+            };
+        }
+
+        public int GetGuildCount()
+        {
+            return _client.Guilds.Count;
+        }
+    }
+}