portal/db/db.go

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2023-04-29 17:38:21 +00:00
package db
import (
"fmt"
"git.lumeweb.com/LumeWeb/portal/model"
"github.com/spf13/viper"
"gorm.io/driver/mysql"
"gorm.io/driver/sqlite"
"gorm.io/gorm"
)
// Declare a global variable to hold the database connection.
var db *gorm.DB
// Init initializes the database connection based on the app's configuration settings.
func Init() {
// If the database connection has already been initialized, panic.
if db != nil {
panic("DB already initialized")
}
// Retrieve database connection settings from the app's configuration using the viper library.
dbType := viper.GetString("database.type")
dbHost := viper.GetString("database.host")
dbPort := viper.GetInt("database.port")
dbSocket := viper.GetString("database.socket")
dbUser := viper.GetString("database.user")
dbPassword := viper.GetString("database.password")
dbName := viper.GetString("database.name")
var err error
var dsn string
switch dbType {
// Connect to a MySQL database.
case "mysql":
if dbSocket != "" {
dsn = fmt.Sprintf("%s:%s@unix(%s)/%s", dbUser, dbPassword, dbSocket, dbName)
} else {
dsn = fmt.Sprintf("%s:%s@tcp(%s:%d)/%s", dbUser, dbPassword, dbHost, dbPort, dbName)
}
db, err = gorm.Open(mysql.Open(dsn), &gorm.Config{})
// Connect to a SQLite database.
case "sqlite":
db, err = gorm.Open(sqlite.Open(dbName), &gorm.Config{})
// If the database type is unsupported, panic.
default:
panic(fmt.Errorf("Unsupported database type: %s \n", dbType))
}
// If there was an error connecting to the database, panic.
if err != nil {
panic(fmt.Errorf("Failed to connect to database: %s \n", err))
}
// Automatically migrate the database schema based on the model definitions.
err = db.Migrator().AutoMigrate(&model.Account{}, &model.Key{}, &model.KeyChallenge{})
if err != nil {
panic(fmt.Errorf("Database setup failed database type: %s \n", err))
}
}
// Get returns the database connection instance.
func Get() *gorm.DB {
return db
}