auth services, middleware, and other stuff

internal/user/handler/register.go

@@ -0,0 +1,67 @@
+package handler
+
+import (
+	"context"
+	"encoding/json"
+	"log/slog"
+	"net/http"
+
+	"gitea.michaelthomson.dev/mthomson/habits/internal/user/service"
+	"github.com/gofrs/uuid/v5"
+)
+
+type UserRegisterer interface {
+	Register(ctx context.Context, email string, password string) (uuid.UUID, error)
+}
+
+type RegisterRequest struct {
+	Email    string `json:"email"`
+	Password string `json:"password"`
+}
+
+type RegisterResponse struct {
+	Id string `json:"id"`
+}
+
+func HandleRegisterUser(logger *slog.Logger, userService UserRegisterer) http.HandlerFunc {
+	return func(w http.ResponseWriter, r *http.Request) {
+		ctx := r.Context()
+		registerRequest := RegisterRequest{}
+		decoder := json.NewDecoder(r.Body)
+		decoder.DisallowUnknownFields()
+		err := decoder.Decode(&registerRequest)
+
+		if err != nil {
+			logger.ErrorContext(ctx, err.Error())
+			http.Error(w, "", http.StatusBadRequest)
+			return
+		}
+
+		uuid, err := userService.Register(ctx, registerRequest.Email, registerRequest.Password)
+
+		if err != nil {
+			if err == service.ErrUserExists {
+				http.Error(w, "", http.StatusConflict)
+				return
+			}
+
+			logger.ErrorContext(ctx, err.Error())
+			http.Error(w, "", http.StatusInternalServerError)
+			return
+		}
+
+		response := RegisterResponse{uuid.String()}
+
+		w.Header().Set("Content-Type", "application/json")
+		w.WriteHeader(http.StatusOK)
+
+		err = json.NewEncoder(w).Encode(response)
+
+		if err != nil {
+			logger.ErrorContext(ctx, err.Error())
+			http.Error(w, "", http.StatusInternalServerError)
+			return
+		}
+
+	}
+}

internal/user/handler/register_test.go

@@ -0,0 +1,148 @@
+package handler
+
+import (
+	"bytes"
+	"context"
+	"encoding/json"
+	"log/slog"
+
+	"errors"
+	"net/http"
+	"net/http/httptest"
+	"testing"
+
+	"gitea.michaelthomson.dev/mthomson/habits/internal/user/service"
+	"github.com/gofrs/uuid/v5"
+)
+
+type MockUserRegisterer struct {
+	RegisterUserFunc func(ctx context.Context, email string, password string) (uuid.UUID, error)
+}
+
+func (m *MockUserRegisterer) Register(ctx context.Context, email string, password string) (uuid.UUID, error) {
+	return m.RegisterUserFunc(ctx, email, password)
+}
+
+func TestCreateUser(t *testing.T) {
+	logger := slog.Default()
+	t.Run("create user", func(t *testing.T) {
+		createUserRequest := RegisterRequest{Email: "test@test.com", Password: "password"}
+
+		newUUID := NewUUID(t)
+
+		service := MockUserRegisterer{
+			RegisterUserFunc: func(ctx context.Context, email string, password string) (uuid.UUID, error) {
+				return newUUID, nil
+			},
+		}
+
+		handler := HandleRegisterUser(logger, &service)
+
+		requestBody, err := json.Marshal(createUserRequest)
+
+		if err != nil {
+			t.Fatalf("Failed to marshal request %+v: %v", createUserRequest, err)
+		}
+
+		req := httptest.NewRequest(http.MethodPost, "/register", bytes.NewBuffer(requestBody))
+		res := httptest.NewRecorder()
+
+		handler(res, req)
+
+		AssertStatusCodes(t, res.Code, http.StatusOK)
+	})
+
+	t.Run("returns 409 when user exists", func(t *testing.T) {
+		createUserRequest := RegisterRequest{Email: "test@test.com", Password: "password"}
+
+		newUUID := NewUUID(t)
+
+		service := MockUserRegisterer{
+			RegisterUserFunc: func(ctx context.Context, email string, password string) (uuid.UUID, error) {
+				return newUUID, service.ErrUserExists
+			},
+		}
+
+		handler := HandleRegisterUser(logger, &service)
+
+		requestBody, err := json.Marshal(createUserRequest)
+
+		if err != nil {
+			t.Fatalf("Failed to marshal request %+v: %v", createUserRequest, err)
+		}
+
+		req := httptest.NewRequest(http.MethodPost, "/register", bytes.NewBuffer(requestBody))
+		res := httptest.NewRecorder()
+
+		handler(res, req)
+
+		AssertStatusCodes(t, res.Code, http.StatusConflict)
+	})
+
+	t.Run("returns 400 with bad json", func(t *testing.T) {
+		handler := HandleRegisterUser(logger, nil)
+
+		badStruct := struct {
+			Foo string
+		}{
+			Foo: "bar",
+		}
+
+		requestBody, err := json.Marshal(badStruct)
+
+		if err != nil {
+			t.Fatalf("Failed to marshal request %+v: %v", badStruct, err)
+		}
+
+		req := httptest.NewRequest(http.MethodPost, "/register", bytes.NewBuffer(requestBody))
+		res := httptest.NewRecorder()
+
+		handler(res, req)
+
+		AssertStatusCodes(t, res.Code, http.StatusBadRequest)
+	})
+
+	t.Run("returns 500 arbitrary errors", func(t *testing.T) {
+		createUserRequest := RegisterRequest{Email: "test@test.com", Password: "password"}
+
+		newUUID := NewUUID(t)
+
+		service := MockUserRegisterer{
+			RegisterUserFunc: func(ctx context.Context, email string, password string) (uuid.UUID, error) {
+				return newUUID, errors.New("foo bar")
+			},
+		}
+
+		handler := HandleRegisterUser(logger, &service)
+
+		requestBody, err := json.Marshal(createUserRequest)
+
+		if err != nil {
+			t.Fatalf("Failed to marshal request %+v: %v", createUserRequest, err)
+		}
+
+		req := httptest.NewRequest(http.MethodPost, "/user", bytes.NewBuffer(requestBody))
+		res := httptest.NewRecorder()
+
+		handler(res, req)
+
+		AssertStatusCodes(t, res.Code, http.StatusInternalServerError)
+	})
+
+}
+
+func AssertStatusCodes(t testing.TB, got, want int) {
+	t.Helper()
+	if got != want {
+		t.Errorf("got status code: %v, want status code: %v", want, got)
+	}
+}
+
+func NewUUID(t testing.TB) uuid.UUID {
+	t.Helper()
+	uuid, err := uuid.NewV4()
+	if err != nil {
+		t.Errorf("error generation uuid: %v", err)
+	}
+	return uuid
+}