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UGQDataAccess/Repository/QuestIdSequenceRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using Microsoft.Extensions.Options;
+using MongoDB.Driver;
+using UGQDatabase.Models;
+using UGQDataAccess.Settings;
+using ServerCommon.UGQ;
+
+namespace UGQDataAccess.Repository
+{
+    public class QuestIdSequenceRepository : BaseRepository<QuestIdSequenceEntity>
+    {
+        private const string CollectionName = "QuestIdSequence";
+
+        public QuestIdSequenceRepository(IMongoClient mongoClient, IOptions<UGQDatabaseSettings> settings) :
+            base(mongoClient, settings.Value.DatabaseName, CollectionName)
+        {
+        }
+
+        public async Task init()
+        {
+            var found = await Collection.FindAsync(x => x.Id == "QuestId");
+            if(found.FirstOrDefault() == null)
+            {
+                QuestIdSequenceEntity entity = new ()
+                {
+                    Id = "QuestId",
+                    Sequence = 0,
+                    UpdatedAt = DateTime.UtcNow,
+                    CreatedAt = DateTime.UtcNow,
+                };
+
+                await Collection.InsertOneAsync(entity);
+            }
+        }
+
+        public async Task<long> getNextSequence()
+        {
+            var filter = Builders<QuestIdSequenceEntity>.Filter.Eq(x => x.Id, "QuestId");
+            var update = Builders<QuestIdSequenceEntity>.Update
+               .Inc(x => x.Sequence, 1)
+               .Set(x => x.UpdatedAt, DateTime.UtcNow);
+
+            var options = new FindOneAndUpdateOptions<QuestIdSequenceEntity>()
+            {
+                ReturnDocument = ReturnDocument.After
+            };
+
+            var result = await Collection.FindOneAndUpdateAsync(filter, update, options);
+
+            return result.Sequence;
+        }
+    }
+}