hpkZm08b

1using Microsoft.AspNetCore.Mvc;
2using Microsoft.EntityFrameworkCore;
3using Microsoft.Extensions.DependencyInjection;
4using System;
5using System.Collections.Generic;
6using System.Linq;
7using System.Text;
8using System.Threading.Tasks;
9
10namespace KosterLib
11{
12    /// <summary>
13    /// Api Controller Base, representing an Entity and related EFC Actions
14    /// </summary>
15    /// <typeparam name="Entity">Entity to Model using this controller class</typeparam>
16    /// <typeparam name="DataContextType">DataContext Type for DependencyInjection</typeparam>
17    [ApiController]
18    [Route("api/[controller]")]
19    public class ApiBase<Entity, DataContextType> : ControllerBase where Entity : class where DataContextType : DbContext
20    {
21        /// <summary>
22        /// The EFC DataContext Reference
23        /// </summary>
24        public DataContextType DataContext { get; set; }
25
26        /// <summary>
27        /// The DbSet containing the entities from the DB
28        /// </summary>
29        private DbSet<Entity> Entities { get; set; }
30
31        /// <summary>
32        /// Default constructor getting IServiceProvider for dependency injection
33        /// </summary>
34        /// <param name="serviceProvider">IServiceProvider for dependency injection</param>
35        public ApiBase(IServiceProvider serviceProvider)
36        {
37            DataContext = serviceProvider.GetService<DataContextType>();
38            Entities = DataContext.Set<Entity>();
39        }
40
41        #region Create Generic(s)
42        /// <summary>
43        /// Create an entity in the DataBase from a Dto Type, Make sure you call SaveChanges after this!
44        /// </summary>
45        /// <typeparam name="EntityPostDto">EntityPostDto Type for reference</typeparam>
46        /// <param name="dto">Dto Object to map into an Entity for adding</param>
47        /// <returns>Entity added to database</returns>
48        public async Task<Entity> CreateEntity<EntityPostDto>(EntityPostDto dto) where EntityPostDto : class =>
49            (await Entities.AddAsync(Map<EntityPostDto, Entity>(dto))).Entity;
50        #endregion
51
52        #region Read Generic(s)
53        /// <summary>
54        /// Get all Entities from the database and map to their respective Dto
55        /// </summary>
56        /// <typeparam name="EntityGetDto">The Dto Type to be mapped to</typeparam>
57        /// <returns>Array of Dto types of entities in the DB</returns>
58        public async Task<ICollection<EntityGetDto>> GetEntities<EntityGetDto>() where EntityGetDto : class =>
59            await Entities.Select(e => Map<Entity, EntityGetDto>(e)).ToArrayAsync();
60
61        /// <summary>
62        /// Get Entity from DB based on the key "Id"
63        /// </summary>
64        /// <typeparam name="KeyType">The type of the key</typeparam>
65        /// <param name="key">The value of the key to find</param>
66        /// <returns>The Entity result from the search by key</returns>
67        public async Task<Entity> GetEntityByKey<KeyType>(KeyType key) =>
68            await Entities.FindAsync(key);
69        #endregion
70
71        /// <summary>
72        /// Map from one type to another using an intersection of their properties
73        /// </summary>
74        /// <typeparam name="Source">The source type to map from</typeparam>
75        /// <typeparam name="Destination">The destination type to map to</typeparam>
76        /// <param name="source">The source object to be mapped from</param>
77        /// <returns>The mapped destination type of the object</returns>
78        private Destination Map<Source, Destination>(Source source) where Source : class where Destination : class
79        {
80            var sourceType = typeof(Source);
81            var destinationType = typeof(Destination);
82
83            var converted = (Destination)destinationType.GetConstructor(null).Invoke(null);
84
85            foreach (var propertyInfo in sourceType.GetProperties().Intersect(destinationType.GetProperties()))
86                destinationType.GetProperty(propertyInfo.Name).SetValue(converted, sourceType.GetProperty(propertyInfo.Name).GetValue(source));
87
88            return converted;
89        }
90    }
91}