feat(*): go 后端项目脚手架

pkg/db/db.go

@@ -0,0 +1,64 @@
+package db
+
+import (
+	"fmt"
+	"os"
+
+	"github.com/zhilv666/navsite/pkg/config"
+	"go.uber.org/zap"
+	"gorm.io/gorm"
+	"gorm.io/gorm/logger"
+)
+
+var db *gorm.DB
+
+func init() {
+	if _, err := os.Stat("./data"); os.IsNotExist(err) {
+		_ = os.Mkdir("./data", os.ModePerm)
+	}
+}
+
+func GetDB() *gorm.DB {
+	if db == nil {
+		panic("数据库未初始化，请先调用 db.InitDB()")
+	}
+	return db
+}
+
+func InitDB(cfg config.Database, log *zap.Logger) {
+	go func() {
+		if err := recover(); err != nil {
+			panic(fmt.Sprintf("Init DB Error: %v", err))
+		}
+	}()
+
+	var dsn string
+	var dialector gorm.Dialector
+
+	switch cfg.Driver {
+	case "mysql":
+		dsn = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4&parseTime=True&loc=Local",
+			cfg.User, cfg.Password, cfg.Host, cfg.Port, cfg.DbName)
+		dialector = connectMySQL(dsn)
+	case "postgres":
+		dsn = fmt.Sprintf("host=%s port=%d user=%s dbname=%s password=%s sslmode=disable",
+			cfg.Host, cfg.Port, cfg.User, cfg.DbName, cfg.Password)
+		dialector = connectPostgres(dsn)
+	case "sqlserver":
+		dsn = fmt.Sprintf("sqlserver://%s:%s@%s:%d?database=%s",
+			cfg.User, cfg.Password, cfg.Host, cfg.Port, cfg.DbName)
+		dialector = connectSQLServer(dsn)
+	case "sqlite", "sqlite3":
+		fmt.Println(cfg.SqliteDbPath)
+		dialector = connectSQLite(cfg.SqliteDbPath)
+	default:
+		panic(fmt.Errorf("unsupport database driver: %s", cfg.Driver))
+	}
+	var err error
+	db, err = gorm.Open(dialector, &gorm.Config{
+		Logger: NewZapGormLogger(log).LogMode(logger.Info),
+	})
+	if err != nil {
+		panic(err)
+	}
+}