Restructure app

app/db.go

@@ -0,0 +1,52 @@
+package main
+
+import (
+	"fmt"
+	"strconv"
+	"strings"
+	"time"
+
+	"gorm.io/driver/postgres"
+	"gorm.io/gorm"
+	gormLogger "gorm.io/gorm/logger"
+)
+
+const CONNECTION_MAX_IDLE_TIME = time.Minute * 1
+const DB_CONNECTION_TIMEOUT = 5
+
+var DBConn *gorm.DB
+
+func InitDB() *gorm.DB {
+	var connectionString = strings.Join([]string{
+		"postgres://",
+		Config.Database.Username, ":",
+		Config.Database.Password, "@",
+		Config.Database.Host, ":",
+		Config.Database.Port, "/",
+		Config.Database.Name,
+		"?sslmode=disable",
+		"&TimeZone=UTC",
+		"&connect_timeout=", strconv.Itoa(DB_CONNECTION_TIMEOUT),
+	}, "")
+
+	var logLevel = gormLogger.Silent
+	if Config.Application.DebugSQL {
+		logLevel = gormLogger.Info
+	}
+
+	var err error
+	DBConn, err = gorm.Open(postgres.Open(connectionString), &gorm.Config{
+		Logger: gormLogger.Default.LogMode(logLevel),
+	})
+	if err != nil {
+		msg := fmt.Sprintf("Error connecting to database: %s. Terminating!", err)
+		Log.Error(msg)
+		panic(msg)
+	}
+
+	// set connection autodisconnect after idle time
+	db, _ := DBConn.DB()
+	db.SetConnMaxIdleTime(CONNECTION_MAX_IDLE_TIME)
+
+	return DBConn
+}