【Golang】ものすごく簡単なタスク管理アプリを作ってみた

package main

import (
    "encoding/json"
    "fmt"
    "net/http"
)

type Task struct {
    ID        int    `json:"id"`
    Name      string `json:"name"`
    Completed bool   `json:"completed"`
}

var tasks []Task
var currentID int

func createTask(w http.ResponseWriter, r *http.Request) {
    var task Task
    json.NewDecoder(r.Body).Decode(&task)
    currentID++
    task.ID = currentID
    tasks = append(tasks, task)
    json.NewEncoder(w).Encode(task)
}

func getTasks(w http.ResponseWriter, r *http.Request) {
    json.NewEncoder(w).Encode(tasks)
}

func updateTask(w http.ResponseWriter, r *http.Request) {
    var task Task
    json.NewDecoder(r.Body).Decode(&task)
    for i, item := range tasks {
        if item.ID == task.ID {
            tasks[i] = task
            break
        }
    }
    json.NewEncoder(w).Encode(task)
}

func deleteTask(w http.ResponseWriter, r *http.Request) {
    var task Task
    json.NewDecoder(r.Body).Decode(&task)
    for i, item := range tasks {
        if item.ID == task.ID {
            tasks = append(tasks[:i], tasks[i+1:]...)
            break
        }
    }
    json.NewEncoder(w).Encode(task)
}

func main() {
    http.HandleFunc("/tasks", getTasks)
    http.HandleFunc("/tasks/create", createTask)
    http.HandleFunc("/tasks/update", updateTask)
    http.HandleFunc("/tasks/delete", deleteTask)
    fmt.Println("Starting server on port 8000")
    http.ListenAndServe(":8000", nil)
}