initial commit

Core/Application/Features/NumberSequenceManager/NumberSequenceService.cs

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+using Application.Common.Repositories;
+using Domain.Entities;
+
+namespace Application.Features.NumberSequenceManager;
+
+public class NumberSequenceService
+{
+
+    private readonly object lockObject = new object();
+    private readonly ICommandRepository<NumberSequence> _repository;
+    private readonly IUnitOfWork _unitOfWork;
+
+    public NumberSequenceService(
+        ICommandRepository<NumberSequence> repository,
+        IUnitOfWork unitOfWork
+        )
+    {
+        _repository = repository;
+        _unitOfWork = unitOfWork;
+    }
+
+    private NumberSequence? GetNumberSequence(string entityName, string prefix, string suffix)
+    {
+        return _repository.GetQuery()
+            .FirstOrDefault(ns => ns.EntityName == entityName && ns.Prefix == prefix && ns.Suffix == suffix);
+    }
+
+    private void UpdateNumberSequence(NumberSequence sequence)
+    {
+        sequence.LastUsedCount++;
+        _unitOfWork.Save();
+    }
+
+    private NumberSequence InsertNumberSequence(string entityName, string prefix, string suffix)
+    {
+        NumberSequence newSequence = new NumberSequence
+        {
+            EntityName = entityName,
+            Prefix = prefix,
+            Suffix = suffix,
+            LastUsedCount = 1
+        };
+
+        _repository.Create(newSequence);
+        _unitOfWork.Save();
+
+        return newSequence;
+    }
+
+    public string GenerateNumber(string entityName, string prefix, string suffix, bool useDate = true, int padding = 4)
+    {
+        var result = string.Empty;
+
+        if (string.IsNullOrEmpty(entityName))
+        {
+            throw new Exception("Parameter entityName must not be null");
+        }
+
+        lock (lockObject)
+        {
+            NumberSequence? sequence = GetNumberSequence(entityName, prefix, suffix);
+
+            if (sequence != null)
+            {
+                UpdateNumberSequence(sequence);
+            }
+            else
+            {
+                sequence = InsertNumberSequence(entityName, prefix, suffix);
+            }
+
+            string formattedNumber = $"{prefix}{sequence?.LastUsedCount?.ToString().PadLeft(padding, '0')}{(useDate ? DateTime.Now.ToString("yyyyMMdd") : "")}{suffix}";
+            result = formattedNumber;
+        }
+
+        return result;
+    }
+
+}

Core/Application/Features/NumberSequenceManager/Queries/GetNumberSequenceList.cs

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+using Application.Common.CQS.Queries;
+using Application.Common.Extensions;
+using AutoMapper;
+using Domain.Entities;
+using MediatR;
+using Microsoft.EntityFrameworkCore;
+
+namespace Application.Features.NumberSequenceManager.Queries;
+
+public record GetNumberSequenceListDto
+{
+    public string? Id { get; init; }
+    public string? EntityName { get; init; }
+    public string? Prefix { get; init; }
+    public string? Suffix { get; init; }
+    public string? LastUsedCount { get; init; }
+    public DateTime? CreatedAtUtc { get; init; }
+}
+
+public class GetNumberSequenceListProfile : Profile
+{
+    public GetNumberSequenceListProfile()
+    {
+        CreateMap<NumberSequence, GetNumberSequenceListDto>();
+    }
+}
+
+public class GetNumberSequenceListResult
+{
+    public List<GetNumberSequenceListDto>? Data { get; init; }
+}
+
+public class GetNumberSequenceListRequest : IRequest<GetNumberSequenceListResult>
+{
+    public bool IsDeleted { get; init; } = false;
+}
+
+
+public class GetNumberSequenceListHandler : IRequestHandler<GetNumberSequenceListRequest, GetNumberSequenceListResult>
+{
+    private readonly IMapper _mapper;
+    private readonly IQueryContext _context;
+
+    public GetNumberSequenceListHandler(IMapper mapper, IQueryContext context)
+    {
+        _mapper = mapper;
+        _context = context;
+    }
+
+    public async Task<GetNumberSequenceListResult> Handle(GetNumberSequenceListRequest request, CancellationToken cancellationToken)
+    {
+        var query = _context
+            .NumberSequence
+            .AsNoTracking()
+            .ApplyIsDeletedFilter(request.IsDeleted)
+            .AsQueryable();
+
+        var entities = await query.ToListAsync(cancellationToken);
+
+        var dtos = _mapper.Map<List<GetNumberSequenceListDto>>(entities);
+
+        return new GetNumberSequenceListResult
+        {
+            Data = dtos
+        };
+    }
+
+
+}
+
+
+