Adding Postgresql driver and basic config structures.

database/database.go

@@ -1,8 +1,11 @@
 package database
 
 import (
+	"fmt"
 	"time"
 
+	"github.com/yxzzy-wtf/gin-gonic-prepack/config"
+	"gorm.io/driver/postgres"
 	"gorm.io/driver/sqlite"
 	"gorm.io/gorm"
 )
@@ -12,9 +15,24 @@ type Database struct {
 }
 
 var Db *gorm.DB
+var Dialect gorm.Dialector
+
+func InitDialect() gorm.Dialector {
+	if config.Config().DbDialect == "sqlite" {
+		return sqlite.Open(config.Config().DbUrl)
+	} else if config.Config().DbDialect == "postgres" {
+		return postgres.New(postgres.Config{
+			DSN: fmt.Sprintf("user=%v password=%v dbname=%v port=%v sslmode=disable TimeZone=UTC",
+				config.Config().DbUsername, config.Config().DbPasswordSecret, config.Config().DbName,
+				config.Config().DbPort),
+		})
+	} else {
+		panic("No valid DB config set up.")
+	}
+}
 
 func Init() *gorm.DB {
-	db, err := gorm.Open(sqlite.Open("prepack.db"), &gorm.Config{})
+	db, err := gorm.Open(InitDialect(), &gorm.Config{})
 	if err != nil {
 		panic(err)
 	}