1. inisialisasi backend golang

backend/pkg/database/database.go

@@ -0,0 +1,75 @@
+package database
+
+import (
+	"bytes"
+	"database/sql"
+	"fmt"
+	"log"
+	"strings"
+
+	"com.sismedika.com.absensi/pkg/config"
+	_ "github.com/go-sql-driver/mysql"
+)
+
+var Handle *sql.DB
+
+func InitDB() {
+	dsn := config.Data.Get("DBuser") + ":" + config.Data.Get("DBpass") + "@tcp(" + config.Data.Get("DBhost") + ":" + config.Data.Get("DBport") + ")/" + config.Data.Get("DBname")
+	handle, err := sql.Open("mysql", dsn)
+	if err != nil {
+		log.Panic(err)
+	}
+
+	if err = handle.Ping(); err != nil {
+		log.Panic(err)
+	}
+	Handle = handle
+}
+
+func LogSQL(query string, args ...interface{}) {
+	var buffer bytes.Buffer
+	nArgs := len(args)
+	// Break the string by question marks, iterate over its parts and for each
+	// question mark - append an argument and format the argument according to
+	// it's type, taking into consideration NULL values and quoting strings.
+	for i, part := range strings.Split(query, "?") {
+		buffer.WriteString(part)
+		if i < nArgs {
+			switch a := args[i].(type) {
+			case int:
+				buffer.WriteString(fmt.Sprintf("%d", a))
+			case int64:
+				buffer.WriteString(fmt.Sprintf("%d", a))
+			case bool:
+				buffer.WriteString(fmt.Sprintf("%t", a))
+			case sql.NullBool:
+				if a.Valid {
+					buffer.WriteString(fmt.Sprintf("%t", a.Bool))
+				} else {
+					buffer.WriteString("NULL")
+				}
+			case sql.NullInt64:
+				if a.Valid {
+					buffer.WriteString(fmt.Sprintf("%d", a.Int64))
+				} else {
+					buffer.WriteString("NULL")
+				}
+			case sql.NullString:
+				if a.Valid {
+					buffer.WriteString(fmt.Sprintf("%q", a.String))
+				} else {
+					buffer.WriteString("NULL")
+				}
+			case sql.NullFloat64:
+				if a.Valid {
+					buffer.WriteString(fmt.Sprintf("%f", a.Float64))
+				} else {
+					buffer.WriteString("NULL")
+				}
+			default:
+				buffer.WriteString(fmt.Sprintf("%q", a))
+			}
+		}
+	}
+	log.Print(buffer.String())
+}