Todo-REST_API/handlers.go at main · saponite/Todo-REST_API · GitHub

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package main

import (
	"context"
	"encoding/json"
	"net/http"
	"strconv"

	"github.com/go-chi/chi/v5"
)

type TaskStorage interface {
	CreateTask(ctx context.Context, title string) (Task, error)
	PrintTask(ctx context.Context, id int) (Task, error)
	UpdateTask(ctx context.Context, id int, title string, done bool) (Task, error)
	PrintAllTasks(ctx context.Context) ([]Task, error)
	DeleteTask(ctx context.Context, id int) error
}

type Handler struct {
	storage TaskStorage
}

func (h *Handler) handlerCreateTask(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()

	var task Task
	if err := json.NewDecoder(r.Body).Decode(&task); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	created, err := h.storage.CreateTask(ctx, task.Title)
	if err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusCreated)
	if err = json.NewEncoder(w).Encode(created); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
}

func (h *Handler) handlerPrintTask(w http.ResponseWriter, r *http.Request) {
	var task Task
	ctx := r.Context()

	idStr := chi.URLParam(r, "id")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	task, err = h.storage.PrintTask(ctx, id)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	if err = json.NewEncoder(w).Encode(task); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
}

func (h *Handler) handlerUpdateTask(w http.ResponseWriter, r *http.Request) {
	respRead := json.NewDecoder(r.Body)
	ctx := r.Context()

	var task Task
	if err := respRead.Decode(&task); err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	idStr := chi.URLParam(r, "id")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	updatedTask, err := h.storage.UpdateTask(ctx, id, task.Title, task.Done)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	err = json.NewEncoder(w).Encode(updatedTask)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}
}

func (h *Handler) handlerPrintAllTasks(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	arrayTasks, err := h.storage.PrintAllTasks(ctx)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	if err = json.NewEncoder(w).Encode(arrayTasks); err != nil {
		http.Error(w, err.Error(), http.StatusInternalServerError)
		return
	}
}

func (h *Handler) handlerDeleteTask(w http.ResponseWriter, r *http.Request) {
	ctx := r.Context()
	idStr := chi.URLParam(r, "id")
	id, err := strconv.Atoi(idStr)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	err = h.storage.DeleteTask(ctx, id)
	if err != nil {
		http.Error(w, err.Error(), http.StatusBadRequest)
		return
	}

	w.Header().Set("Content-Type", "application/json")
	w.WriteHeader(http.StatusNoContent)
}