Project/Project.Web/Controllers/CategoryController.cs

using Microsoft.AspNetCore.Mvc;
using Project.Application.DTOs.Incoming;
using Project.Application.Interfaces;

namespace Project.Web.Controllers
{
    [Route("api/[controller]")]
    [ApiController]
    public class CategoryController : ControllerBase
    {

        // FIELDS FOR CTOR
        private readonly ICategoryService _categoryService;

        // CTOR
        public CategoryController(ICategoryService categoryService)
        {
            _categoryService = categoryService;
        }

        // CREATE
        [HttpPost]
        [ProducesResponseType(StatusCodes.Status201Created)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ProducesResponseType(StatusCodes.Status500InternalServerError)]
        public async Task<IActionResult> CreateCategory([FromBody] CreatingCategoryDto creatingCategoryDto)
        {
            var result = await _categoryService.AddCategoryAsync(creatingCategoryDto);
            
            if (result != null)
            {
                var id = result.Id;
                var createdResource = new { Id = id };
                var actionName = nameof(GetCategoryById);
                var routeValue = new { id = createdResource.Id };
                return CreatedAtAction(actionName, routeValue, createdResource);
            }
            else
            {
                return BadRequest("geht nix");
            }
        }

        // READ ALL
        [HttpGet]
        [ProducesResponseType(StatusCodes.Status200OK)]
        public async Task<IActionResult> GetCategories()
        {
            var categories = await _categoryService.GetAllAsync();
            return Ok(categories);
        }

        // READ BY ID
        [HttpGet("id/{id}", Name = "GetCategoryById")]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        public async Task<IActionResult> GetCategoryById(int id)
        {
            if (id <= 0)
            {
                return BadRequest("Invalid Id");
            }
            var category = await _categoryService.GetByIdAsync(id);
            if (category == null)
            {
                return NotFound();
            }
            return Ok(category);
        }

        // READ BY NAME
        [HttpGet("name/{name}", Name = "GetCategoryByName")]
        [ProducesResponseType(StatusCodes.Status200OK)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        public async Task<IActionResult> GetCategoryByName(string name)
        {
            if (string.IsNullOrEmpty(name))
            {
                return BadRequest("Name cannot be empty");
            }
            var category = await _categoryService.GetByNameAsync(name);
            if (category == null)
            {
                return NotFound();
            }
            return Ok(category);
        }

        // UPDATE
        [HttpPut("id/{id}", Name = "UpdateCategory")]
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        public async Task<IActionResult> UpdateCategory(int id, UpdatingCategoryDto updatingCategoryDto)
        {
            var updated = await _categoryService.UpdateCategoryAsync(updatingCategoryDto);
            return Ok(updated);
        }

        // DELETE
        [HttpDelete("id/{id}", Name = "DeleteCategory")]
        [ProducesResponseType(StatusCodes.Status204NoContent)]
        [ProducesResponseType(StatusCodes.Status404NotFound)]
        [ProducesResponseType(StatusCodes.Status400BadRequest)]
        public async Task<IActionResult> DeleteCategory([FromRoute] int id)
        {
            await _categoryService.DeleteCategoryAsync(id);
            return Ok();
        }
    }
}