Add project files.

Author: Abu Maryam

ToDoList.DAL/AppDbContext.cs

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+using Microsoft.EntityFrameworkCore;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Entities;
+
+namespace ToDoList.DAL;
+
+public class AppDbContext : DbContext
+{
+    public AppDbContext(DbContextOptions<AppDbContext> options) : base(options)
+    {
+        Database.EnsureCreated();
+    }
+
+    public DbSet<TaskEntity> Tasks { get; set; }
+}

ToDoList.DAL/Interfaces/IBaseRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.DAL.Interfaces;
+
+public interface IBaseRepository<T>
+{
+    Task Create(T entity);
+    IQueryable<T> GetAll();
+    Task Delete(T entity);
+    Task<T> Update(T entity);
+}

ToDoList.DAL/Repositories/TaskRepository.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.DAL.Interfaces;
+using ToDoList.Domain.Entities;
+using ToDoList.Domain.Response;
+
+namespace ToDoList.DAL.Repositories;
+
+public class TaskRepository : IBaseRepository<TaskEntity>
+{
+    private readonly AppDbContext _appDbContext;
+    public TaskRepository(AppDbContext appDbContext)
+    {
+        _appDbContext = appDbContext;
+    }
+    public async Task Create(TaskEntity entity)
+    {
+        await _appDbContext.Tasks.AddAsync(entity);
+        await _appDbContext.SaveChangesAsync();
+    }
+
+    public async Task Delete(TaskEntity entity)
+    {
+        _appDbContext.Tasks.Remove(entity);
+        await _appDbContext.SaveChangesAsync();
+    }
+
+    public IQueryable<TaskEntity> GetAll()
+    {
+        return _appDbContext.Tasks;
+    }
+
+    public async Task<TaskEntity> Update(TaskEntity entity)
+    {
+        _appDbContext.Tasks.Update(entity);
+        await _appDbContext.SaveChangesAsync();
+
+        return entity;
+    }
+}

ToDoList.DAL/ToDoList.DAL.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="7.0.19" />
+  </ItemGroup>
+
+  <ItemGroup>
+    <ProjectReference Include="..\ToDoList.Domain\ToDoList.Domain.csproj" />
+  </ItemGroup>
+
+</Project>

ToDoList.Domain/Entities/TaskEntity.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Enums;
+
+namespace ToDoList.Domain.Entities;
+
+public class TaskEntity
+{
+    public long Id { get; set; }
+    public string Name { get; set; }
+    public string Description { get; set; }
+    public DateTime CreatedAt { get; set; }
+    public Priority Priority { get; set; }
+    public bool IsDone { get; set; }
+}

ToDoList.Domain/Enums/Priority.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Enums;
+
+public enum Priority
+{
+    [Display(Name = "Простая")]
+    Easy = 1,
+    [Display(Name = "Важная")]
+    Medium = 2,
+    [Display(Name = "Критичная")]
+    Hard = 3
+}

ToDoList.Domain/Enums/StatusCode.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Enums;
+
+public enum StatusCode
+{
+    TaskAlreadyCreated = 1,
+    TaskNotFound = 2,
+    OK = 200,
+    InternalServerError = 500
+}

ToDoList.Domain/Extensions/EnumExtension.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Reflection;
+using System.Reflection.Metadata.Ecma335;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Extensions
+{
+    public static class EnumExtension
+    {
+        public static string GetDisplayName(this System.Enum enumValue)
+        {
+            return enumValue.GetType()
+                .GetMember(enumValue.ToString())
+                .First()
+                .GetCustomAttribute<DisplayAttribute>()
+                ?.GetName() ?? "Неопределенный";
+        }
+    }
+}

ToDoList.Domain/Extensions/QueryExtension.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Linq.Expressions;
+using System.Runtime.CompilerServices;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Extensions;
+
+public static class QueryExtension
+{
+    public static IQueryable<T> WhereIf<T>(this IQueryable<T> source, bool condition,
+        Expression<Func<T, bool>> predicate)
+    {
+        if (condition)
+            return source.Where(predicate);
+        return source;
+    }
+}

ToDoList.Domain/Filters/PagingFilter.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Filters;
+
+public class PagingFIlter
+{
+    public int PageSize { get; set; }
+    public int Skip { get; set; }
+}

ToDoList.Domain/Filters/Task/TaskFilter.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Enums;
+
+namespace ToDoList.Domain.Filters.Task;
+
+public class TaskFilter : PagingFIlter
+{
+    public string Name { get; set; }
+    public Priority? Priority { get; set; }
+}

ToDoList.Domain/Helpers/CsvBaseService.cs

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+using CsvHelper;
+using CsvHelper.Configuration;
+using System;
+using System.Collections;
+using System.Collections.Generic;
+using System.Globalization;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Helpers;
+
+public class CsvBaseService<T>
+{
+    private readonly CsvConfiguration _configuration;
+    public CsvBaseService()
+    {
+        _configuration = GetConfiguration();
+    }
+
+
+    public byte[] UploadFile(IEnumerable data)
+    {
+        using (var stream = new MemoryStream())
+        {
+            using (var streamWriter =  new StreamWriter(stream))
+            {
+                using (var csvWriter = new CsvWriter(streamWriter, _configuration))
+                {
+                    csvWriter.WriteRecords(data);
+                    streamWriter.Flush();
+                    return stream.ToArray();
+                }
+            }
+        }
+    }
+
+    public CsvConfiguration GetConfiguration()
+    {
+        return new CsvConfiguration(CultureInfo.InvariantCulture)
+        {
+            Delimiter = ",",
+            Encoding = Encoding.UTF8,
+            NewLine = "\r\n",
+        };
+    }
+}

ToDoList.Domain/Response/BaseResponse.cs

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+using System;
+using System.Collections.Generic;
+using System.Diagnostics;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Enums;
+
+namespace ToDoList.Domain.Response;
+
+public class BaseResponse<T> : IBaseResponse<T>
+{
+    public string Description { get; set; }
+    public StatusCode StatusCode { get; set; }
+    public T Data { get; set; }
+}
+
+public interface IBaseResponse<T>
+{
+    string Description { get; set; }
+    StatusCode StatusCode { get; set; }
+    T Data { get; set; }
+}

ToDoList.Domain/Response/DataTableResult.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.Response;
+
+public class DataTableResult
+{
+    public object Data { get; set; }
+    public int Total { get; set; }
+}

ToDoList.Domain/ToDoList.Domain.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net7.0</TargetFramework>
+    <ImplicitUsings>enable</ImplicitUsings>
+    <Nullable>enable</Nullable>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="CsvHelper" Version="32.0.3" />
+  </ItemGroup>
+
+</Project>

ToDoList.Domain/ViewModels/Task/CompletedTaskViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace ToDoList.Domain.ViewModels.Task;
+
+public class CompletedTaskViewModel
+{
+    public long Id { get; set; }
+    public string Name { get; set; }
+    public string Description { get; set; }
+}

ToDoList.Domain/ViewModels/Task/CreateTaskViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Enums;
+
+namespace ToDoList.Domain.ViewModels.Task;
+
+public class CreateTaskViewModel
+{
+    public string Name { get; set; }
+    public string Description { get; set; }
+    public Priority Priority { get; set; }
+
+    public void Validate()
+    {
+        if (string.IsNullOrWhiteSpace(Name))
+        {
+            throw new ArgumentNullException(Name, "enter name of the task");
+        }
+        if (string.IsNullOrWhiteSpace(Description))
+        {
+            throw new ArgumentNullException(Name, "enter description of the task");
+        }
+    }
+}

ToDoList.Domain/ViewModels/Task/TaskViewModel.cs

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+using System;
+using System.Collections.Generic;
+using System.ComponentModel;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Text;
+using System.Threading.Tasks;
+using ToDoList.Domain.Enums;
+
+namespace ToDoList.Domain.ViewModels.Task
+{
+    public class TaskViewModel
+    {
+        public long Id { get; set; }
+        [Display(Name = "Название")]
+        public string Name { get; set; }
+        [Display(Name = "Описание")]
+        public string Description { get; set; }
+        [Display(Name = "Дата создания")]
+        public string CreatedAt { get; set; }
+        [Display(Name = "Приоритет")]
+        public string Priority { get; set; }
+        [Display(Name = "Готовность")]
+        public string IsDone { get; set; }
+    }
+}