Refactor and remove sqlite and replace with MySQL

internal/helpers/security/admin.go

@@ -0,0 +1,16 @@
+package security
+
+import (
+	"database/sql"
+	"log"
+)
+
+func IsAdmin(db *sql.DB, userID int) bool {
+	var isAdmin bool
+	err := db.QueryRow(`SELECT is_admin FROM users WHERE id = ?`, userID).Scan(&isAdmin)
+	if err != nil {
+		log.Printf("⚠️ Failed to check is_admin for user %d: %v", userID, err)
+		return false
+	}
+	return isAdmin
+}

internal/helpers/security/password.go

@@ -0,0 +1,13 @@
+package security
+
+import "golang.org/x/crypto/bcrypt"
+
+func HashPassword(password string) (string, error) {
+	bytes, err := bcrypt.GenerateFromPassword([]byte(password), bcrypt.DefaultCost)
+	return string(bytes), err
+}
+
+func CheckPasswordHash(hash, password string) bool {
+	err := bcrypt.CompareHashAndPassword([]byte(hash), []byte(password))
+	return err == nil
+}

internal/helpers/security/token.go

@@ -0,0 +1,15 @@
+package security
+
+import (
+	"crypto/rand"
+	"encoding/hex"
+)
+
+func GenerateSecureToken() (string, error) {
+	b := make([]byte, 32)
+	_, err := rand.Read(b)
+	if err != nil {
+		return "", err
+	}
+	return hex.EncodeToString(b), nil
+}

internal/helpers/security/users.go

@@ -0,0 +1,17 @@
+package security
+
+import (
+	"net/http"
+
+	httpHelpers "synlotto-website/helpers/http"
+)
+
+func GetCurrentUserID(r *http.Request) (int, bool) {
+	session, err := httpHelpers.GetSession(nil, r)
+	if err != nil {
+		return 0, false
+	}
+
+	id, ok := session.Values["user_id"].(int)
+	return id, ok
+}