feat: DTOs, Result Type

TicketAppIncrArchi.API/Controllers/TicketsController.cs

@@ -1,6 +1,7 @@
 using Microsoft.AspNetCore.Mvc;
+using TicketAppIncrArchi.Application.DTO;
 using TicketAppIncrArchi.Application.Interfaces;
-using TicketAppIncrArchi.Domain.Entities;
+
 
 namespace TicketAppIncrArchi.API.Controllers;
 
@@ -9,20 +10,45 @@ namespace TicketAppIncrArchi.API.Controllers;
 public class TicketsController : ControllerBase
 {
 
+    //TicketService contain the list of tickets and  
+    //function to retrieve them
     private readonly ITicketService _service;
-
     public TicketsController(ITicketService service)
     {
         _service = service;
     }
 
+//-----------------------------------------------------------
+
     [HttpGet]
-    public IEnumerable<Ticket> Get() => _service.GetAll();
+    public IEnumerable<TicketResponse> Get()
+    {
+        return _service.GetAll();
+    }
+
+    [HttpGet("{id}")]
+    public ActionResult<TicketResponse> Get(Guid id) 
+    {
+        var ticket = _service.GetById(id);
+        if (ticket == null) return NotFound();
+        return Ok(ticket);
+
+    }
 
     [HttpPost]
-    public IActionResult Create(Ticket ticket)
+    public IActionResult Create(CreateTicketRequest request)
     {
-        var created = _service.Create(ticket);
-        return CreatedAtAction(nameof(Get), new {id=created.Id}, created);
+        var result = _service.Create(request);
+
+        if (result is FailureResult<CreateTicketResponse> fail)
+            return BadRequest(fail.Error);
+
+        var success = (SuccessResult<CreateTicketResponse>) result;
+
+        return CreatedAtAction(
+            nameof(Get),
+            new {id = success.Value.Id },
+            success.Value
+        );
     }
 }

TicketAppIncrArchi.Application/Common/Result.cs

@@ -0,0 +1,54 @@
+using Microsoft.AspNetCore.Authentication;
+using Microsoft.AspNetCore.SignalR;
+
+public abstract class Result<T>
+{
+    public abstract bool Success {get;}
+
+    public static Result<T> Ok(T value) => new SuccessResult<T>(value);
+    public static Result<T> Fail(string error) => new FailureResult<T>(error);
+}
+
+public sealed class SuccessResult<T> : Result<T>
+{
+    public override bool Success => true;
+    public T Value {get;}
+
+    public SuccessResult(T value)
+    {
+        Value = value ?? throw new ArgumentNullException(nameof(value));
+    }
+
+}
+
+public sealed class FailureResult<T> : Result<T>
+{
+    public override bool Success => false;
+
+    public string Error {get;}
+
+    public FailureResult(string error)
+    {
+        Error = error ?? throw new ArgumentNullException(nameof(error));
+    }
+
+}
+
+
+/*
+private Result(bool success, T? value, string? error)
+    {
+        Success = success;
+        Value = value;
+        Error = error;
+    }
+}
+
+public static Result<T> Ok(T value)
+        => new(true,value,null);
+
+    public static Result<T> Fail(string error)
+        => new(false, default, error);    
+
+}
+*/

TicketAppIncrArchi.Application/DTOs/TicketsDTOs.cs

@@ -0,0 +1,18 @@
+using System.ComponentModel;
+using TicketAppIncrArchi.Domain.Entities;
+
+
+namespace TicketAppIncrArchi.Application.DTO;
+
+public class CreateTicketRequest
+{
+    public string Title {get; set;} = "";
+    public string Description {get; set; } = "";
+}
+
+public class CreateTicketResponse
+{
+    public Guid Id {get;set;}
+    public string Title{get;set;} = "";
+    public string Description{get;set;} = "";
+}

TicketAppIncrArchi.Application/Interfaces/ITicketService.cs

@@ -1,11 +1,14 @@
+using TicketAppIncrArchi.Application.DTO;
 using TicketAppIncrArchi.Domain.Entities;
 
 namespace TicketAppIncrArchi.Application.Interfaces;  
 
 public interface ITicketService
 { 
-    IEnumerable<Ticket> GetAll();
+    
+    //TODO: implement Repository   
+    IEnumerable<TicketResponse> GetAll();
 
     Ticket? GetById(Guid id);
-    Ticket Create(Ticket ticket);
+    Result<CreateTicketResponse> Create(CreateTicketRequest request);
 }

TicketAppIncrArchi.Application/Services/TicketServices.cs

@@ -1,4 +1,6 @@
 using System.Runtime.CompilerServices;
+using Microsoft.AspNetCore.Http.HttpResults;
+using TicketAppIncrArchi.Application.DTO;
 using TicketAppIncrArchi.Application.Interfaces;
 using TicketAppIncrArchi.Domain.Entities;
 
@@ -8,18 +10,49 @@ public class TicketService : ITicketService
 {
 
     private readonly List<Ticket> _tickets = new();
-    public IEnumerable<Ticket> GetAll() => _tickets;
+    public IEnumerable<TicketResponse> GetAll()
+    {
+        var result =_tickets.Select(t => new TicketResponse
+        {
+            Id = t.Id,
+            Title = t.Title,
+            Description =t.Description,
+        }); 
+    
+        return result;
+    }
+
     
     public Ticket? GetById(Guid id)
     {
         return _tickets.FirstOrDefault(ticket => ticket.Id == id);
     } 
 
-    public Ticket Create(Ticket ticket)
+    public Result<CreateTicketResponse> Create(CreateTicketRequest request)
     {
-        ticket.Id = Guid.NewGuid();
+        
+        if (string.IsNullOrWhiteSpace(request.Title))
+            return Result<CreateTicketResponse>.Fail("Title is Required");
+
+        var ticket = new Ticket
+        {
+            Id = Guid.NewGuid(),
+            Title = request.Title,
+            Description = request.Description  
+        };
+
+        //send creation to repo
         _tickets.Add(ticket);
-        return ticket;
+
+        var response = new CreateTicketResponse 
+        {
+            Id = ticket.Id,
+            Title = ticket.Title,
+            Description = ticket.Description
+        };
+
+        return Result<CreateTicketResponse>.Ok(response);
+        
     }
     
 }