feat: +register

package/backend/cmd/main.go

@@ -1,25 +1,34 @@
 package main
 
 import (
-	// "context"
-	"fmt"
+	"context"
+	// "fmt"
 	"log"
 	"net/http"
-	// "os"
+	"os"
 
-	"github.com/gorilla/mux"
 	// "github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+	"github.com/go-chi/chi/v5"
+	"github.com/go-chi/chi/middleware"
+
+	"github.com/ISNUFFI/booking/internal/user"
 )
 
 const serverAddr = ":8080"
 
 func main() {
-	r := mux.NewRouter()
+	r := chi.NewRouter()
+	r.Use(middleware.Logger)
 
-	r.HandleFunc("/hello_world", func(w http.ResponseWriter, r *http.Request) {
-		w.WriteHeader(http.StatusOK)
-		fmt.Fprintln(w, "Hello world!")
-	}).Methods("GET")
+	pool, err := pgxpool.New(context.Background(), os.Getenv("DATABASE_URL"))
+	if err != nil {
+		log.Fatal("could not acquire a postgres connection pool: ", err)
+	}
+	defer pool.Close()
+
+	userHandler := user.NewHandler(pool)
+	userHandler.AttachHandlers(r)
 
 	log.Println("Server listening on ", serverAddr)
 	log.Fatal(http.ListenAndServe(serverAddr, r))

package/backend/go.mod

@@ -3,12 +3,16 @@ module github.com/ISNUFFI/booking
 go 1.25.7
 
 require (
-	github.com/gorilla/mux v1.8.1
+	github.com/go-chi/chi v1.5.5
+	github.com/go-chi/chi/v5 v5.3.0
 	github.com/jackc/pgx/v5 v5.9.2
+	golang.org/x/crypto v0.52.0
 )
 
 require (
 	github.com/jackc/pgpassfile v1.0.0 // indirect
 	github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 // indirect
-	golang.org/x/text v0.29.0 // indirect
+	github.com/jackc/puddle/v2 v2.2.2 // indirect
+	golang.org/x/sync v0.20.0 // indirect
+	golang.org/x/text v0.37.0 // indirect
 )

package/backend/go.sum

@@ -1,8 +1,10 @@
 github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
 github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
 github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/gorilla/mux v1.8.1 h1:TuBL49tXwgrFYWhqrNgrUNEY92u81SPhu7sTdzQEiWY=
-github.com/gorilla/mux v1.8.1/go.mod h1:AKf9I4AEqPTmMytcMc0KkNouC66V3BtZ4qD5fmWSiMQ=
+github.com/go-chi/chi v1.5.5 h1:vOB/HbEMt9QqBqErz07QehcOKHaWFtuj87tTDVz2qXE=
+github.com/go-chi/chi v1.5.5/go.mod h1:C9JqLr3tIYjDOZpzn+BCuxY8z8vmca43EeMgyZt7irw=
+github.com/go-chi/chi/v5 v5.3.0 h1:halUjDxhshgXHMrao5bB8eNBXo/rnzwr8m5m36glehM=
+github.com/go-chi/chi/v5 v5.3.0/go.mod h1:R+tYY2hNuVUUjxoPtqUdgBqevM9s9njzkTLutVsOCto=
 github.com/jackc/pgpassfile v1.0.0 h1:/6Hmqy13Ss2zCq62VdNG8tM1wchn8zjSGOBJ6icpsIM=
 github.com/jackc/pgpassfile v1.0.0/go.mod h1:CEx0iS5ambNFdcRtxPj5JhEz+xB6uRky5eyVu/W2HEg=
 github.com/jackc/pgservicefile v0.0.0-20240606120523-5a60cdf6a761 h1:iCEnooe7UlwOQYpKFhBabPMi4aNAfoODPEFNiAnClxo=
@@ -18,10 +20,12 @@ github.com/stretchr/testify v1.3.0/go.mod h1:M5WIy9Dh21IEIfnGCwXGc5bZfKNJtfHm1UV
 github.com/stretchr/testify v1.7.0/go.mod h1:6Fq8oRcR53rry900zMqJjRRixrwX3KX962/h/Wwjteg=
 github.com/stretchr/testify v1.11.1 h1:7s2iGBzp5EwR7/aIZr8ao5+dra3wiQyKjjFuvgVKu7U=
 github.com/stretchr/testify v1.11.1/go.mod h1:wZwfW3scLgRK+23gO65QZefKpKQRnfz6sD981Nm4B6U=
-golang.org/x/sync v0.17.0 h1:l60nONMj9l5drqw6jlhIELNv9I0A4OFgRsG9k2oT9Ug=
-golang.org/x/sync v0.17.0/go.mod h1:9KTHXmSnoGruLpwFjVSX0lNNA75CykiMECbovNTZqGI=
-golang.org/x/text v0.29.0 h1:1neNs90w9YzJ9BocxfsQNHKuAT4pkghyXc4nhZ6sJvk=
-golang.org/x/text v0.29.0/go.mod h1:7MhJOA9CD2qZyOKYazxdYMF85OwPdEr9jTtBpO7ydH4=
+golang.org/x/crypto v0.52.0 h1:RMs7fP2rXdep0CftQlK8Uf+kibLm7qkCcradZWYz988=
+golang.org/x/crypto v0.52.0/go.mod h1:1QgfPxDqh0T2M/elOJtp9RvuR95kVjir0e6/BvEmGbc=
+golang.org/x/sync v0.20.0 h1:e0PTpb7pjO8GAtTs2dQ6jYa5BWYlMuX047Dco/pItO4=
+golang.org/x/sync v0.20.0/go.mod h1:9xrNwdLfx4jkKbNva9FpL6vEN7evnE43NNNJQ2LF3+0=
+golang.org/x/text v0.37.0 h1:Cqjiwd9eSg8e0QAkyCaQTNHFIIzWtidPahFWR83rTrc=
+golang.org/x/text v0.37.0/go.mod h1:a5sjxXGs9hsn/AJVwuElvCAo9v8QYLzvavO5z2PiM38=
 gopkg.in/check.v1 v0.0.0-20161208181325-20d25e280405/go.mod h1:Co6ibVJAznAaIkqp8huTwlJQCZ016jof/cbN4VW5Yz0=
 gopkg.in/yaml.v3 v3.0.0-20200313102051-9f266ea9e77c/go.mod h1:K4uyk7z7BCEPqu6E+C64Yfv1cQ7kz7rIZviUmN+EgEM=
 gopkg.in/yaml.v3 v3.0.1 h1:fxVm/GzAzEWqLHuvctI91KS9hhNmmWOoWu0XTYJS7CA=

package/backend/internal/user/errors.go

@@ -0,0 +1,6 @@
+package user
+
+import "errors"
+
+var ErrDuplicateKey = errors.New("duplicate key")
+var ErrEmailAlreadyExists = errors.New("email already exists")

package/backend/internal/user/handler.go

@@ -0,0 +1,86 @@
+package user
+
+import (
+	"errors"
+	"encoding/json"
+	"fmt"
+	"log"
+	"net/http"
+	"net/mail"
+
+	"github.com/go-chi/chi/v5"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type Handler struct {
+	service Service
+}
+
+func NewHandler(pool *pgxpool.Pool) Handler {
+	return Handler {
+		service: NewService(NewRepo(pool)),
+	}
+}
+
+type RegisterRequest struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+}
+
+type RegisterValidationError struct {
+	message string
+}
+
+func (e RegisterValidationError) Error() string {
+	return e.message
+}
+
+func (req RegisterRequest) Validate() error {
+	if _, err := mail.ParseAddress(req.Email); err != nil {
+		return RegisterValidationError {
+			message: "invalid email",
+		}
+	}
+
+	if len(req.Password) < 10 {
+		return RegisterValidationError {
+			message: "password is too short",
+		}
+	}
+
+	return nil
+}
+
+func (h Handler) RegisterHandler(w http.ResponseWriter, r *http.Request) {
+	var req RegisterRequest
+
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		http.Error(w, "invalid json", http.StatusBadRequest)
+		return
+	}
+
+	if err := req.Validate(); err != nil {
+		http.Error(w, err.Error(), http.StatusBadRequest)
+		return
+	}
+
+	err := h.service.Register(r.Context(), req.Email, req.Password)
+	if err != nil {
+		log.Println("could not register: ", err)
+		switch {
+		case errors.Is(err, ErrEmailAlreadyExists):
+			http.Error(w, "email already exists", http.StatusConflict)
+		default:
+			http.Error(w, "internal error", http.StatusInternalServerError)
+		}
+		return
+	}
+
+	w.WriteHeader(http.StatusCreated)
+	fmt.Fprintln(w, "success")
+}
+
+func (h Handler) AttachHandlers(router chi.Router) {
+	router.Post("/register", h.RegisterHandler)
+	// router.Post("/login", LoginHandler)
+}

package/backend/internal/user/repo.go

@@ -0,0 +1,46 @@
+package user
+
+import (
+	"context"
+	"errors"
+
+	// "github.com/jackc/pgx/v5"
+	"github.com/jackc/pgx/v5/pgconn"
+	"github.com/jackc/pgx/v5/pgxpool"
+)
+
+type Repo struct {
+	pool *pgxpool.Pool
+}
+
+func NewRepo(pool *pgxpool.Pool) Repo {
+	return Repo {
+		pool: pool,
+	}
+}
+
+func (r *Repo) Exec(ctx context.Context, query string, args ...any) (pgconn.CommandTag, error) {
+	conn, err := r.pool.Acquire(context.Background())
+	if err != nil {
+		return pgconn.CommandTag{}, err
+	}
+
+	return conn.Exec(ctx, query, args...)
+}
+
+func (r *Repo) CreateUser(ctx context.Context, email, hash string) error {
+	_, err := r.Exec(
+		ctx,
+		"INSERT INTO users(email, password_hash) VALUES ($1, $2)",
+		email, hash,
+	)
+
+	if err != nil {
+		var pgErr *pgconn.PgError
+		if errors.As(err, &pgErr) {
+			return ErrDuplicateKey
+		}
+	}
+
+	return err
+}

package/backend/internal/user/service.go

@@ -0,0 +1,41 @@
+package user
+
+import (
+	"context"
+	"errors"
+
+	"golang.org/x/crypto/bcrypt"
+)
+
+type Service struct {
+	repo Repo
+}
+
+func NewService(repo Repo) Service {
+	return Service {
+		repo: repo,
+	}
+}
+
+func (s Service) Register(ctx context.Context, email, password string) error {
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), 14)
+	if err != nil {
+		return err
+	}
+
+	if err = s.repo.CreateUser(ctx, email, string(bytes)); err != nil {
+		switch {
+		case errors.Is(err, ErrDuplicateKey):
+			return ErrEmailAlreadyExists
+		default:
+			return err
+		}
+	}
+	
+	return nil
+}
+
+// func (s Service) Login(password string) (string, error) {
+// 	hash, err := s.repo.
+// 	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+// }