handler_user.go

package main

import (
	"context"
	"fmt"
	"time"

	"gator/internal/database"

	"github.com/google/uuid"
)

func handlerList(s *state, cmd command) error {
	if len(cmd.Args) != 0 {
		return fmt.Errorf("usage: %s", cmd.Name)
	}
	users, err := s.db.ListUsers(context.Background())
	if err != nil {
		return fmt.Errorf("couldn't list users: %w", err)
	}
	for _, user := range users {
		if user.Name == s.cfg.CurrentUserName {
			fmt.Println(user.Name, "(current) ")
		}
		fmt.Println(user.Name)
	}
	return nil
}
func handlerReset(s *state, cmd command) error {
	if len(cmd.Args) != 0 {
		return fmt.Errorf("usage: %s", cmd.Name)
	}
	err := s.db.DeleteAllUsers(context.Background())
	if err != nil {
		return fmt.Errorf("couldn't delete all users: %w", err)
	}
	fmt.Println("Database reset successfull")
	return nil
}
func handlerRegister(s *state, cmd command) error {
	if len(cmd.Args) != 1 {
		return fmt.Errorf("usage: %v <name>", cmd.Name)
	}

	name := cmd.Args[0]

	_, err := s.db.GetUser(context.Background(), name)
	if err == nil {
		// User exists! Return an error
		return fmt.Errorf("user already exists: %v", name)
	}

	user, err := s.db.CreateUser(context.Background(), database.CreateUserParams{
		ID:        uuid.New(),
		CreatedAt: time.Now().UTC(),
		UpdatedAt: time.Now().UTC(),
		Name:      name,
	})
	if err != nil {
		return fmt.Errorf("couldn't create user: %w", err)
	}

	err = s.cfg.SetUser(user.Name)
	if err != nil {
		return fmt.Errorf("couldn't set current user: %w", err)
	}

	fmt.Println("User created successfully:")
	printUser(user)
	return nil
}

func handlerLogin(s *state, cmd command) error {
	if len(cmd.Args) != 1 {
		return fmt.Errorf("usage: %s <name>", cmd.Name)
	}
	name := cmd.Args[0]

	_, err := s.db.GetUser(context.Background(), name)
	if err != nil {
		return fmt.Errorf("couldn't find user: %w", err)
	}

	err = s.cfg.SetUser(name)
	if err != nil {
		return fmt.Errorf("couldn't set current user: %w", err)
	}

	fmt.Println("User switched successfully!")
	return nil
}

func printUser(user database.User) {
	fmt.Printf(" * ID:      %v\n", user.ID)
	fmt.Printf(" * Name:    %v\n", user.Name)
}