feat: Added chapter 6 first auth attempt

go.mod

@@ -6,4 +6,5 @@ require (
 	github.com/google/uuid v1.6.0 // indirect
 	github.com/joho/godotenv v1.5.1 // indirect
 	github.com/lib/pq v1.10.9 // indirect
+	golang.org/x/crypto v0.28.0 // indirect
 )

go.sum

@@ -4,3 +4,5 @@ github.com/joho/godotenv v1.5.1 h1:7eLL/+HRGLY0ldzfGMeQkb7vMd0as4CfYvUVzLqw0N0=
 github.com/joho/godotenv v1.5.1/go.mod h1:f4LDr5Voq0i2e/R5DDNOoa2zzDfwtkZa6DnEwAbqwq4=
 github.com/lib/pq v1.10.9 h1:YXG7RB+JIjhP29X+OtkiDnYaXQwpS4JEWq7dtCCRUEw=
 github.com/lib/pq v1.10.9/go.mod h1:AlVN5x4E4T544tWzH6hKfbfQvm3HdbOxrmggDNAPY9o=
+golang.org/x/crypto v0.28.0 h1:GBDwsMXVQi34v5CCYUm2jkJvu4cbtru2U4TN2PSyQnw=
+golang.org/x/crypto v0.28.0/go.mod h1:rmgy+3RHxRZMyY0jjAJShp2zgEdOqj2AO7U0pYmeQ7U=

internal/auth/auth.go

@@ -0,0 +1,12 @@
+package auth
+
+import "golang.org/x/crypto/bcrypt"
+
+func HashPassword(password string) (string, error) {
+	hashedPassword, err := bcrypt.GenerateFromPassword([]byte(password), 10)
+	return string(hashedPassword), err
+}
+
+func CheckPasswordHash(password, hash string) error {
+	return bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+}

internal/database/models.go

@@ -23,4 +23,5 @@ type User struct {
 	CreatedAt      time.Time
 	UpdatedAt      time.Time
 	Email          string
+	HashedPassword string
 }

internal/database/users.sql.go

@@ -10,31 +10,33 @@ import (
 )
 
 const createUser = `-- name: CreateUser :one
-INSERT INTO users (id, created_at, updated_at, email)
+INSERT INTO users (id, created_at, updated_at, email, hashed_password)
 VALUES (
     gen_random_uuid(),
     NOW(),
     NOW(),
-    $1
+    $1,
+	$2
 )
-RETURNING id, created_at, updated_at, email
+RETURNING id, created_at, updated_at, email, hashed_password
 `
 
-func (q *Queries) CreateUser(ctx context.Context, email string) (User, error) {
-	row := q.db.QueryRowContext(ctx, createUser, email)
+func (q *Queries) CreateUser(ctx context.Context, email string, hashed_password string) (User, error) {
+	row := q.db.QueryRowContext(ctx, createUser, email, hashed_password)
 	var i User
 	err := row.Scan(
 		&i.ID,
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Email,
+		&i.HashedPassword,
 	)
 	return i, err
 }
 
 const deleteUser = `-- name: DeleteUser :one
 DELETE FROM users
-RETURNING id, created_at, updated_at, email
+RETURNING id, created_at, updated_at, email, hashed_password
 `
 
 func (q *Queries) DeleteUser(ctx context.Context) (User, error) {
@@ -45,6 +47,25 @@ func (q *Queries) DeleteUser(ctx context.Context) (User, error) {
 		&i.CreatedAt,
 		&i.UpdatedAt,
 		&i.Email,
+		&i.HashedPassword,
+	)
+	return i, err
+}
+
+const getUserByEmail = `-- name: GetUserByEmail :one
+SELECT id, created_at, updated_at, email, hashed_password FROM users
+WHERE users.email = $1
+`
+
+func (q *Queries) GetUserByEmail(ctx context.Context, email string) (User, error) {
+	row := q.db.QueryRowContext(ctx, getUserByEmail, email)
+	var i User
+	err := row.Scan(
+		&i.ID,
+		&i.CreatedAt,
+		&i.UpdatedAt,
+		&i.Email,
+		&i.HashedPassword,
 	)
 	return i, err
 }

login.go

@@ -0,0 +1,51 @@
+package main
+
+import (
+	"encoding/json"
+	"log"
+	"net/http"
+
+	"github.com/finchrelia/chirpy-server/internal/auth"
+)
+
+func (cfg *apiConfig) Login(w http.ResponseWriter, r *http.Request) {
+	type params struct {
+		Email    string `json:"email"`
+		Password string `json:"password"`
+	}
+
+	decoder := json.NewDecoder(r.Body)
+	p := params{}
+	err := decoder.Decode(&p)
+	if err != nil {
+		log.Printf("Incorrect email or password")
+		w.WriteHeader(401)
+		return
+	}
+	loggedUser, err := cfg.DB.GetUserByEmail(r.Context(), p.Email)
+	if err != nil {
+		log.Printf("Error retrieving user: %s", err)
+	}
+
+	err = auth.CheckPasswordHash(p.Password, loggedUser.HashedPassword)
+	if err != nil {
+		log.Printf("Incorrect email or password")
+		w.WriteHeader(401)
+		return
+	}
+
+	data, err := json.Marshal(User{
+		ID:        loggedUser.ID,
+		CreatedAt: loggedUser.CreatedAt,
+		UpdatedAt: loggedUser.UpdatedAt,
+		Email:     loggedUser.Email,
+	})
+	if err != nil {
+		log.Printf("Error marshalling JSON: %s", err)
+		w.WriteHeader(500)
+		return
+	}
+	w.Header().Set("Content-Type", "application/json")
+	w.WriteHeader(200)
+	w.Write(data)
+}

main.go

@@ -51,6 +51,7 @@ func main() {
 	mux.HandleFunc("POST /api/chirps", apiCfg.chirpsCreate)
 	mux.HandleFunc("POST /api/users", apiCfg.createUsers)
 	mux.HandleFunc("GET /api/chirps/{chirpID}", apiCfg.getChirp)
+	mux.HandleFunc("POST /api/login", apiCfg.Login)
 
 	server := &http.Server{
 		Addr:    ":8080",

sql/queries/users.sql

@@ -11,3 +11,7 @@ RETURNING *;
 -- name: DeleteUser :one
 DELETE FROM users
 RETURNING *;
+
+-- name: GetUserByEmail :one
+SELECT * FROM users
+WHERE users.email = $1;

sql/schema/003_users_auth.sql

@@ -0,0 +1,7 @@
+-- +goose Up
+ALTER TABLE users
+ADD COLUMN hashed_password TEXT DEFAULT 'unset' NOT NULL;
+
+-- +goose Down
+ALTER TABLE users
+DROP COLUMN hashed_password;

users.go

@@ -6,6 +6,7 @@ import (
 	"net/http"
 	"time"
 
+	"github.com/finchrelia/chirpy-server/internal/auth"
 	"github.com/google/uuid"
 )
 
@@ -14,11 +15,13 @@ type User struct {
 	CreatedAt      time.Time `json:"created_at"`
 	UpdatedAt      time.Time `json:"updated_at"`
 	Email          string    `json:"email"`
+	HashedPassword string    `json:"-"`
 }
 
 func (cfg *apiConfig) createUsers(w http.ResponseWriter, r *http.Request) {
 	type parameters struct {
 		Email    string `json:"email"`
+		Password string `json:"password"`
 	}
 
 	decoder := json.NewDecoder(r.Body)
@@ -30,7 +33,12 @@ func (cfg *apiConfig) createUsers(w http.ResponseWriter, r *http.Request) {
 		return
 	}
 	defer r.Body.Close()
-	newDBUser, err := cfg.DB.CreateUser(r.Context(), params.Email)
+
+	hashedPassword, err := auth.HashPassword(params.Password)
+	if err != nil {
+		log.Printf("Error hashing password: %s", err)
+	}
+	newDBUser, err := cfg.DB.CreateUser(r.Context(), params.Email, hashedPassword)
 	if err != nil {
 		log.Printf("Error creating user %s: %s", params.Email, err)
 		w.WriteHeader(500)