HttpTriggerTodoAPIMem.cs

using System.IO;
using Microsoft.AspNetCore.Mvc;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Extensions.Http;
using Microsoft.AspNetCore.Http;
using Microsoft.Azure.WebJobs.Host;
using Newtonsoft.Json;
using System.Threading.Tasks;
using System.Collections.Generic;
using System.Linq;

namespace AzureFunctionsTodo
{

    public static class TodoApiInMemory
    {
        static List<Todo> items = new List<Todo>();

        [FunctionName("InMemory_CreateTodo")]
        public static async Task<IActionResult>CreateTodo([HttpTrigger(AuthorizationLevel.Anonymous, "post", Route = "todo")]HttpRequest req, TraceWriter log)
        {
            log.Info("Creating a new todo list item");
            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
            var input = JsonConvert.DeserializeObject<TodoCreateModel>(requestBody);

            var todo = new Todo() { TaskDescription = input.TaskDescription };
            items.Add(todo);
            return new OkObjectResult(todo);
        }

        [FunctionName("InMemory_GetTodos")]
        public static IActionResult GetTodos([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "todo")]HttpRequest req, TraceWriter log)
        {
            log.Info("Getting todo list items");
            return new OkObjectResult(items);
        }

        [FunctionName("InMemory_GetTodoById")]
        public static IActionResult GetTodoById([HttpTrigger(AuthorizationLevel.Anonymous, "get", Route = "todo/{id}")]HttpRequest req, TraceWriter log, string id)
        {
            var todo = items.FirstOrDefault(t => t.Id == id);
            if (todo == null)
            {
                return new NotFoundResult();
            }
            return new OkObjectResult(todo);
        }

        [FunctionName("InMemory_UpdateTodo")]
        public static async Task<IActionResult> UpdateTodo([HttpTrigger(AuthorizationLevel.Anonymous, "put", Route = "todo/{id}")]HttpRequest req, TraceWriter log, string id)
        {
            var todo = items.FirstOrDefault(t => t.Id == id);
            if (todo == null)
            {
                return new NotFoundResult();
            }

            string requestBody = await new StreamReader(req.Body).ReadToEndAsync();
            var updated = JsonConvert.DeserializeObject<TodoUpdateModel>(requestBody);

            todo.IsCompleted = updated.IsCompleted;
            if (!string.IsNullOrEmpty(updated.TaskDescription))
            {
                todo.TaskDescription = updated.TaskDescription;
            }

            return new OkObjectResult(todo);
        }

        [FunctionName("InMemory_DeleteTodo")]
        public static IActionResult DeleteTodo([HttpTrigger(AuthorizationLevel.Anonymous, "delete", Route = "todo/{id}")]HttpRequest req, TraceWriter log, string id)
        {
            var todo = items.FirstOrDefault(t => t.Id == id);
            if (todo == null)
            {
                return new NotFoundResult();
            }
            items.Remove(todo);
            return new OkResult();
        }
    }
}