fix(quiz): save current answer before submitting exam-mode quiz

(cherry picked from commit 538edbb)

Author: raizasafeel

frontend/src/components/Quiz.vue

@@ -512,7 +512,7 @@ const handlePageHide = () => {
 	if (activeQuestion.value > 0 && !quizSubmission.data) {
 		const params = new URLSearchParams({
 			quiz: quiz.data.name,
-			results: localStorage.getItem(quiz.data.title),
+			results: localStorage.getItem(quiz.data.title) || '[]',
 		})
 
 		navigator.sendBeacon(
@@ -648,7 +648,7 @@ const quizSubmission = createResource({
 	makeParams(values) {
 		return {
 			quiz: quiz.data.name,
-			results: localStorage.getItem(quiz.data.title),
+			results: localStorage.getItem(quiz.data.title) || '[]',
 		}
 	},
 })
@@ -833,7 +833,9 @@ const resetQuestion = () => {
 
 const submitQuiz = () => {
 	if (!quiz.data.show_answers) {
-		if (questionDetails.data.type == 'Open Ended') addToLocalStorage()
+		if (questionDetails.data.type == 'Open Ended' || getAnswers().length) {
+			addToLocalStorage()
+		}
 		setTimeout(() => {
 			createSubmission()
 		}, 500)

lms/lms/doctype/lms_quiz/lms_quiz.py

@@ -101,8 +101,8 @@ def set_total_marks(questions: list) -> int:
 
 
 @frappe.whitelist()
-def submit_quiz(quiz: str, results: str):
-	results = results and json.loads(results)
+def submit_quiz(quiz: str, results: str | None = None):
+	results = json.loads(results) if results else []
 	percentage = 0
 
 	quiz_details = frappe.db.get_value(