feat: optional MySQL/MariaDB database driver for deployments that cannot use local SQLite

internal/infrastructure/persistence/database/mysql.go

@@ -0,0 +1,86 @@
+package database
+
+import (
+	domainUpdate "RenewCMS/internal/domain/update"
+	"fmt"
+	"net"
+	"strings"
+	"time"
+
+	mysqldriver "github.com/go-sql-driver/mysql"
+	"gorm.io/driver/mysql"
+	"gorm.io/gorm"
+)
+
+const (
+	DriverMySQL = "mysql"
+
+	mysqlCharset         = "utf8mb4"
+	mysqlLocation        = "UTC"
+	mysqlCollation       = "utf8mb4_bin"
+	mysqlConnectTimeout  = 5 * time.Second
+	mysqlSessionSQLMode  = "'ONLY_FULL_GROUP_BY,STRICT_TRANS_TABLES,NO_ZERO_IN_DATE,ERROR_FOR_DIVISION_BY_ZERO,NO_ENGINE_SUBSTITUTION'"
+	mysqlTableOptionsKey = "gorm:table_options"
+	redactedPassword     = "***"
+)
+
+type mysqlDriver struct{}
+
+type MySQLConfig struct {
+	Host     string
+	Port     string
+	User     string
+	Password string
+	Name     string
+	TLS      string
+}
+
+func MySQLDSN(config MySQLConfig) string {
+	dsn := mysqldriver.NewConfig()
+	dsn.User = config.User
+	dsn.Passwd = config.Password
+	dsn.Net = "tcp"
+	dsn.Addr = net.JoinHostPort(config.Host, config.Port)
+	dsn.DBName = config.Name
+	dsn.TLSConfig = config.TLS
+	dsn.ParseTime = true
+	dsn.ClientFoundRows = true
+	dsn.Collation = mysqlCollation
+	dsn.Timeout = mysqlConnectTimeout
+	dsn.Params = map[string]string{
+		"charset":  mysqlCharset,
+		"loc":      mysqlLocation,
+		"sql_mode": mysqlSessionSQLMode,
+	}
+	return dsn.FormatDSN()
+}
+
+func (mysqlDriver) Open(source string) (*gorm.DB, error) {
+	parsed, err := mysqldriver.ParseDSN(source)
+	if err != nil {
+		return nil, fmt.Errorf("the mysql connection settings are invalid")
+	}
+	db, err := gorm.Open(mysql.Open(source), &gorm.Config{})
+	if err != nil {
+		return nil, fmt.Errorf("cannot use the mysql server at %s: %s", parsed.Addr, redact(err.Error(), parsed.Passwd))
+	}
+	return db, nil
+}
+
+func (mysqlDriver) NewBackup(db *gorm.DB, directory string, now func() time.Time) domainUpdate.DatabaseBackup {
+	return NewMySQLBackup(db, directory, now)
+}
+
+func redact(message string, secret string) string {
+	if secret == "" {
+		return message
+	}
+	return strings.ReplaceAll(message, secret, redactedPassword)
+}
+
+func tableOptionsFor(db *gorm.DB) *gorm.DB {
+	if db.Dialector.Name() == DriverMySQL {
+		return db.Set(mysqlTableOptionsKey, "DEFAULT CHARSET="+mysqlCharset+" COLLATE="+mysqlCollation)
+	}
+	return db
+}