From 53761db1e005e01f7ced713e630b47ea2b7c5a62 Mon Sep 17 00:00:00 2001
From: Alexey <alex@oblat.lv>
Date: Thu, 18 Dec 2025 10:49:56 +0200
Subject: [PATCH] add user crud interface in impl

---
 internal/user/gorm_store.go | 50 ++++++++++++++++++++++
 internal/user/model.go      | 11 +++++
 internal/user/service.go    | 36 ++++++++++++++++
 internal/user/store.go      |  9 ++++
 internal/user/user_test.go  | 84 +++++++++++++++++++++++++++++++++++++
 5 files changed, 190 insertions(+)
 create mode 100644 internal/user/gorm_store.go
 create mode 100644 internal/user/model.go
 create mode 100644 internal/user/service.go
 create mode 100644 internal/user/store.go
 create mode 100644 internal/user/user_test.go

diff --git a/internal/user/gorm_store.go b/internal/user/gorm_store.go
new file mode 100644
index 0000000..c4a8792
--- /dev/null
+++ b/internal/user/gorm_store.go
@@ -0,0 +1,50 @@
+package user
+
+import (
+	"fmt"
+
+	"gorm.io/gorm"
+)
+
+type GormUserStore struct {
+	db *gorm.DB
+}
+
+func NewGormUserStore(db *gorm.DB) (*GormUserStore, error) {
+	if db == nil {
+		return nil, fmt.Errorf("db is nil")
+	}
+	return &GormUserStore{
+		db: db,
+	}, nil
+}
+
+func (s *GormUserStore) Create(user *User) error {
+	return s.db.Create(user).Error
+}
+
+func (s *GormUserStore) GetByID(id int64) (*User, error) {
+	var user User
+	err := s.db.First(&user, id).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+func (s *GormUserStore) GetByUsername(username string) (*User, error) {
+	var user User
+	err := s.db.Where("username = ?", username).First(&user).Error
+	if err != nil {
+		return nil, err
+	}
+	return &user, nil
+}
+
+func (s *GormUserStore) Update(user *User) error {
+	return s.db.Save(user).Error
+}
+
+func (s *GormUserStore) Delete(id int64) error {
+	return s.db.Delete(&User{}, id).Error
+}
diff --git a/internal/user/model.go b/internal/user/model.go
new file mode 100644
index 0000000..f6fca17
--- /dev/null
+++ b/internal/user/model.go
@@ -0,0 +1,11 @@
+package user
+
+import "gorm.io/gorm"
+
+type User struct {
+	ID        int64          `gorm:"primaryKey"`
+	Username  string         `gorm:"uniqueIndex;not null"`
+	Email     string         `gorm:"uniqueIndex;not null"`
+	Password  string         `gorm:"not null"`
+	DeletedAt gorm.DeletedAt `gorm:"index"`
+}
diff --git a/internal/user/service.go b/internal/user/service.go
new file mode 100644
index 0000000..068f21c
--- /dev/null
+++ b/internal/user/service.go
@@ -0,0 +1,36 @@
+package user
+
+import "fmt"
+
+type Service struct {
+	store UserCRUD
+}
+
+func NewService(store UserCRUD) (UserCRUD, error) {
+	if store == nil {
+		return nil, fmt.Errorf("store is nil")
+	}
+	return &Service{
+		store: store,
+	}, nil
+}
+
+func (s *Service) Create(user *User) error {
+	return s.store.Create(user)
+}
+
+func (s *Service) GetByID(id int64) (*User, error) {
+	return s.store.GetByID(id)
+}
+
+func (s *Service) GetByUsername(username string) (*User, error) {
+	return s.store.GetByUsername(username)
+}
+
+func (s *Service) Update(user *User) error {
+	return s.store.Update(user)
+}
+
+func (s *Service) Delete(id int64) error {
+	return s.store.Delete(id)
+}
diff --git a/internal/user/store.go b/internal/user/store.go
new file mode 100644
index 0000000..b2f8b3b
--- /dev/null
+++ b/internal/user/store.go
@@ -0,0 +1,9 @@
+package user
+
+type UserCRUD interface {
+	Create(user *User) error
+	GetByID(id int64) (*User, error)
+	GetByUsername(username string) (*User, error)
+	Update(user *User) error
+	Delete(id int64) error
+}
diff --git a/internal/user/user_test.go b/internal/user/user_test.go
new file mode 100644
index 0000000..629583c
--- /dev/null
+++ b/internal/user/user_test.go
@@ -0,0 +1,84 @@
+package user
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"gorm.io/driver/sqlite"
+	"gorm.io/gorm"
+)
+
+func setupTestDB(t *testing.T) *gorm.DB {
+	t.Helper()
+
+	dbPath := filepath.Join("testdata", "users.db")
+
+	_ = os.Remove(dbPath)
+
+	db, err := gorm.Open(sqlite.Open(dbPath), &gorm.Config{})
+	if err != nil {
+		t.Fatalf("failed to open db: %v", err)
+	}
+
+	if err := db.AutoMigrate(&User{}); err != nil {
+		t.Fatalf("failed to migrate: %v", err)
+	}
+
+	return db
+}
+
+func TestUsersCRUD(t *testing.T) {
+	db := setupTestDB(t)
+
+	store, err := NewGormUserStore(db)
+	if err != nil {
+		t.Fatalf("failed to create store: %v", err)
+	}
+
+	service, err := NewService(store)
+	if err != nil {
+		t.Fatalf("failed to create service: %v", err)
+	}
+
+	user := &User{
+		Username: "testuser",
+		Email:    "test@example.com",
+		Password: "password123",
+	}
+
+	if err := service.Create(user); err != nil {
+		t.Fatalf("failed to create user: %v", err)
+	}
+	retrieved, err := service.GetByID(user.ID)
+	if err != nil {
+		t.Fatalf("failed to get user by ID: %v", err)
+	}
+	if retrieved.Username != user.Username {
+		t.Fatalf("expected username %s, got %s", user.Username, retrieved.Username)
+	}
+
+	retrievedByUsername, err := service.GetByUsername(user.Username)
+	if err != nil {
+		t.Fatalf("failed to get user by username: %v", err)
+	}
+	if retrievedByUsername.Email != user.Email {
+		t.Fatalf("expected email %s, got %s", user.Email, retrievedByUsername.Email)
+	}
+
+	user.Email = "newemail@example.com"
+	if err := service.Update(user); err != nil {
+		t.Fatalf("failed to update user: %v", err)
+	}
+	retrieved, err = service.GetByID(user.ID)
+	if err != nil {
+		t.Fatalf("failed to get user by ID: %v", err)
+	}
+	if retrieved.Email != user.Email {
+		t.Fatalf("expected email %s, got %s", user.Email, retrieved.Email)
+	}
+	err = service.Delete(user.ID)
+	if err != nil {
+		t.Fatalf("failed to delete user: %v", err)
+	}
+}
\ No newline at end of file