first commit

internal/database/database.go

@@ -0,0 +1,79 @@
+package database
+
+import (
+	"fmt"
+
+	"homework-manager/internal/config"
+	"homework-manager/internal/models"
+
+	"github.com/glebarez/sqlite"
+	"gorm.io/driver/mysql"
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+var DB *gorm.DB
+
+func Connect(dbConfig config.DatabaseConfig, debug bool) error {
+	var logMode logger.LogLevel
+	if debug {
+		logMode = logger.Info
+	} else {
+		logMode = logger.Silent
+	}
+
+	gormConfig := &gorm.Config{
+		Logger: logger.Default.LogMode(logMode),
+	}
+
+	var db *gorm.DB
+	var err error
+
+	switch dbConfig.Driver {
+	case "mysql":
+		dsn := fmt.Sprintf("%s:%s@tcp(%s:%s)/%s?charset=utf8mb4&parseTime=True&loc=Local",
+			dbConfig.User,
+			dbConfig.Password,
+			dbConfig.Host,
+			dbConfig.Port,
+			dbConfig.Name,
+		)
+		db, err = gorm.Open(mysql.Open(dsn), gormConfig)
+
+	case "postgres":
+		dsn := fmt.Sprintf("host=%s port=%s user=%s password=%s dbname=%s sslmode=disable",
+			dbConfig.Host,
+			dbConfig.Port,
+			dbConfig.User,
+			dbConfig.Password,
+			dbConfig.Name,
+		)
+		db, err = gorm.Open(postgres.Open(dsn), gormConfig)
+
+	case "sqlite":
+		fallthrough
+	default:
+		db, err = gorm.Open(sqlite.Open(dbConfig.Path), gormConfig)
+	}
+
+	if err != nil {
+		return err
+	}
+
+	DB = db
+	return nil
+}
+
+func Migrate() error {
+	return DB.AutoMigrate(
+		&models.User{},
+		&models.Assignment{},
+		&models.APIKey{},
+	)
+}
+
+func GetDB() *gorm.DB {
+	return DB
+}
+