Convert db backend to use Gorm, with basis for support

for Mysql and Postgres in addition to existing Sqlite

backend/internal/config/db.go

@@ -0,0 +1,79 @@
+package config
+
+import (
+	"fmt"
+	"strings"
+)
+
+const (
+	DatabaseSqlite   = "sqlite"
+	DatabasePostgres = "postgres"
+	DatabaseMysql    = "mysql"
+)
+
+type db struct {
+	Driver   string `json:"driver" envconfig:"optional,default=sqlite"`
+	Host     string `json:"host" envconfig:"optional,default="`
+	Port     int    `json:"port" envconfig:"optional,default="`
+	Username string `json:"username" envconfig:"optional,default="`
+	Password string `json:"password" envconfig:"optional,default="`
+	Name     string `json:"name" envconfig:"optional,default="`
+	SSLMode  string `json:"sslmode" envconfig:"optional,default=deisable"`
+}
+
+// GetDriver returns the lowercase driver name
+func (d *db) GetDriver() string {
+	return strings.ToLower(d.Driver)
+}
+
+// GetGormConnectURL is used by Gorm
+func (d *db) GetGormConnectURL() string {
+	switch d.GetDriver() {
+	case DatabaseSqlite:
+		return fmt.Sprintf("%s/nginxproxymanager.db", Configuration.DataFolder)
+	case DatabasePostgres:
+		return fmt.Sprintf("host=%s user=%s password=%s dbname=%s port=%d sslmode=%s TimeZone=UTC",
+			d.Host,
+			d.Username,
+			d.Password,
+			d.Name,
+			d.Port,
+			d.SSLMode,
+		)
+	case DatabaseMysql:
+		return fmt.Sprintf("%s:%s@tcp(%s:%d)/%s?charset=utf8mb4&parseTime=True&loc=Local",
+			d.Username,
+			d.Password,
+			d.Host,
+			d.Port,
+			d.Name,
+		)
+	}
+	return ""
+}
+
+// GetDBMateConnectURL is used by Dbmate
+func (d *db) GetDBMateConnectURL() string {
+	switch d.GetDriver() {
+	case DatabaseSqlite:
+		return fmt.Sprintf("sqlite:%s/nginxproxymanager.db", Configuration.DataFolder)
+	case DatabasePostgres:
+		return fmt.Sprintf("postgres://%s:%s@%s:%d/%s?sslmode=%s",
+			d.Username,
+			d.Password,
+			d.Host,
+			d.Port,
+			d.Name,
+			d.SSLMode,
+		)
+	case DatabaseMysql:
+		return fmt.Sprintf("mysql://%s:%s@%s:%d/%s",
+			d.Username,
+			d.Password,
+			d.Host,
+			d.Port,
+			d.Name,
+		)
+	}
+	return ""
+}