flexiblere Umsetzung des LendControllers durch Depedency-Injection

Controllers/LendController.cs

@@ -13,13 +13,18 @@ namespace BuecherwurmAPI.Controllers
     [ApiController]
     public class LendController : ControllerBase
     {
-        private readonly MockLendRepo _mockLendRepo = new MockLendRepo();
+        private ILendRepo _repository;
+        
+        public LendController(ILendRepo repository)
+        {
+            _repository = repository;
+        }
         
         //GET api/leihvorgang/
         [HttpGet]
         public ActionResult<IEnumerable<Lend>> GetAllLends()
         {
-            var lends = _mockLendRepo.GetAllLends();
+            var lends = _repository.GetAllLends();
             return Ok(lends);
         }
 
@@ -27,7 +32,7 @@ namespace BuecherwurmAPI.Controllers
         [HttpGet("{id}")]
         public ActionResult<Lend> GetLend(int id)
         {
-            var lend = _mockLendRepo.GetLendById(id);
+            var lend = _repository.GetLendById(id);
             return Ok(lend);
         }
     }

Startup.cs

@@ -2,6 +2,7 @@ using System;
 using System.Collections.Generic;
 using System.Linq;
 using System.Threading.Tasks;
+using BuecherwurmAPI.Data;
 using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.HttpsPolicy;
@@ -26,6 +27,11 @@ namespace BuecherwurmAPI
         public void ConfigureServices(IServiceCollection services)
         {
             services.AddControllers();
+            
+            // Adds a service that is created once per connection.
+            // It takes an interface and a specific implementation.
+            // That allows to swap the implementation easily.
+            services.AddScoped<ILendRepo, MockLendRepo>();
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.