From c2f3af7be1443965e4688c36f6c710c1c69ffa2e Mon Sep 17 00:00:00 2001
From: balint1414 <ropoli.balint.1414@gmail.com>
Date: Tue, 24 Feb 2026 21:13:53 +0100
Subject: [PATCH] =?UTF-8?q?=C3=81tlagsz=C3=A1ml=C3=A1l=C3=B3=20seg=C3=A9d?=
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---
 firka/lib/helpers/average_helper.dart | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)
 create mode 100644 firka/lib/helpers/average_helper.dart

diff --git a/firka/lib/helpers/average_helper.dart b/firka/lib/helpers/average_helper.dart
new file mode 100644
index 0000000..ccabc82
--- /dev/null
+++ b/firka/lib/helpers/average_helper.dart
@@ -0,0 +1,23 @@
+import 'package:firka/helpers/api/model/grade.dart';
+
+double calculateAverage(List<Grade> sortedGrades) {
+  double totalWeight = 0.0;
+  double weightedSum = 0.0;
+
+  for (final grade in sortedGrades) {
+    final value = grade.numericValue;
+    final weight = grade.weightPercentage;
+
+    if (value != null && weight != null) {
+      weightedSum += value * weight;
+      totalWeight += weight;
+    }
+  }
+
+  if (totalWeight == 0) {
+    return double.parse(0.0.toStringAsFixed(2));
+  }
+
+  final avg = weightedSum / totalWeight;
+  return double.parse(avg.toStringAsFixed(2));
+}
\ No newline at end of file