Initial working commit

src/lib/scoring.ts

@@ -0,0 +1,41 @@
+type OptionLite = { id: string; isCorrect: boolean };
+type QuestionLite = {
+  id: string;
+  type: "MULTIPLE_CHOICE" | "SATA";
+  options: OptionLite[];
+};
+
+export function scoreQuestion(
+  question: QuestionLite,
+  selectedIds: string[]
+): number {
+  const correctIds = question.options
+    .filter((o) => o.isCorrect)
+    .map((o) => o.id);
+
+  if (question.type === "MULTIPLE_CHOICE") {
+    return correctIds.includes(selectedIds[0]) ? 1 : 0;
+  }
+
+  // SATA: partial credit
+  const correctSelected = selectedIds.filter((id) =>
+    correctIds.includes(id)
+  ).length;
+  const incorrectSelected = selectedIds.filter(
+    (id) => !correctIds.includes(id)
+  ).length;
+  return Math.max(0, correctSelected - incorrectSelected) / correctIds.length;
+}
+
+export function scoreQuiz(
+  questions: QuestionLite[],
+  answers: Record<string, string[]>
+) {
+  let total = 0;
+  const perQuestion = questions.map((q) => {
+    const points = scoreQuestion(q, answers[q.id] ?? []);
+    total += points;
+    return { questionId: q.id, points };
+  });
+  return { total, maxScore: questions.length, perQuestion };
+}