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* Modified by Allan Ninal — 2026-08-12
*
* Grade banner now goes through submissionGradeDisplay.js: it withholds on a
* REJECTED late submission as well as a pending one, and refuses a non-numeric
* grade so an ungraded submission can no longer render as "NaN%".
*/
import React, { useEffect, useMemo, useState } from "react";
import { useLocation, useParams } from "react-router-dom";
import { useSelector } from "react-redux";
import axios from "axios";
import {
Alert,
Autocomplete,
Box,
Card,
CardContent,
Chip,
Divider,
Grid,
LinearProgress,
Paper,
Stack,
TextField,
Typography,
} from "@mui/material";
import PersonSearchIcon from "@mui/icons-material/PersonSearch";
import HourglassTopIcon from "@mui/icons-material/HourglassTop";
import BlockIcon from "@mui/icons-material/Block";
import GradeIcon from "@mui/icons-material/Grade";
import CommentIcon from "@mui/icons-material/Comment";
import AssignmentIcon from "@mui/icons-material/Assignment";
import TaskAltIcon from "@mui/icons-material/TaskAlt";
import CheckCircleIcon from "@mui/icons-material/CheckCircle";
import ReplayIcon from "@mui/icons-material/Replay";
import TimerIcon from "@mui/icons-material/Timer";
import CalendarTodayIcon from "@mui/icons-material/CalendarToday";
import { enqueueSnackbar } from "notistack";
import { API_ENDPOINTS } from "@/api/endpoints";
import { TeacherAssignmentAPI } from "@/api/teacher/TeacherAssignmentAPI";
import SimpleLoading from "@/utils/components/SimpleLoading";
import { utcToLocalTime } from "@/utils/helpers/utcToLocalTime";
import SubmissionAnswersList from "@/utils/components/submission-review/SubmissionAnswersList";
import {
canShowGrade,
formatGradePercent,
gradeProgressValue,
gradeStatusLabel,
} from "@/utils/components/submission-review/submissionGradeDisplay";
const lowercaseQuestionTypes = (questions) =>
questions?.map((entry) =>
entry.questionType && typeof entry.questionType === "string"
? { ...entry, questionType: entry.questionType.toLowerCase() }
: entry
);
// Same palette rule as the student's own submission-details page — keeps a
// grade read identically whether the student or their teacher is looking at it.
const getRemarksColor = (remarks) => {
Eif (!remarks) return "default";
const lower = remarks.toLowerCase();
if (lower === "passed" || lower === "pass" || lower === "excellent") return "success";
if (lower === "failed" || lower === "fail") return "error";
return "warning";
};
const IndividualAnswers = () => {
const location = useLocation();
const { classCode } = useParams();
const { specificClassData } = useSelector((state) => state.TeacherSpecificClass);
const assignmentId = location.state?.assignmentId;
const [roster, setRoster] = useState([]);
const [rosterLoading, setRosterLoading] = useState(false);
const [selectedStudent, setSelectedStudent] = useState(null);
const [submission, setSubmission] = useState(null);
const [loading, setLoading] = useState(false);
const [error, setError] = useState(null);
// Per-question teacher comments, keyed by questionId. Loaded from
// submission.teacherComments on fetch; saves/deletes hit the real
// student-submission comment endpoint and only update local state once
// the request confirms, so the UI reflects what's actually persisted.
const [comments, setComments] = useState({});
// Per-question in-flight comment action, keyed by questionId: "saving" | "deleting".
// Drives the loading state shown in CommentBox.
const [commentActionState, setCommentActionState] = useState({});
// Per-question in-flight points-edit action, keyed by questionId: "saving".
// Points edits only ever touch this assignment's own point override
// (assignments_collection) — the teacher_questionbank question record is
// never modified.
const [pointsActionState, setPointsActionState] = useState({});
const [markActionState, setMarkActionState] = useState({});
useEffect(() => {
const fetchRoster = async () => {
if (!specificClassData?._id) return;
setRosterLoading(true);
try {
const response = await axios.get(API_ENDPOINTS.teacher.class.roster.fetch(specificClassData._id));
const students = (response.data?.class_roster || [])
.filter((student) => student.status === "Enrolled")
.sort((a, b) => a.last_name.localeCompare(b.last_name));
setRoster(students);
} catch (err) {
console.error("Error:", err.response?.data || err.message);
} finally {
setRosterLoading(false);
}
};
fetchRoster();
}, [specificClassData?._id]);
const studentOptions = useMemo(
() =>
roster.map((student) => ({
_id: student._id,
label: `${student.last_name}, ${student.first_name}`,
})),
[roster]
);
// Shared fetch/parse for a student's submission — used both on student
// selection and to refresh after a points edit (which can recount
// total_score/grade/pass-fail on already-graded submissions, so a partial
// local patch isn't enough to keep the summary card accurate).
const fetchAndSetSubmission = async (studentId) => {
const response = await TeacherAssignmentAPI.prototype.fetchStudentSubmission(
classCode,
assignmentId,
studentId
);
const data = response.data?.data ?? response.data;
setSubmission({
...data,
details: lowercaseQuestionTypes(data?.details ?? []),
});
setComments(data?.teacherComments || {});
};
const handleStudentChange = async (_, option) => {
setSelectedStudent(option);
setSubmission(null);
setError(null);
setComments({});
setCommentActionState({});
setPointsActionState({});
Iif (!option || !assignmentId) return;
setLoading(true);
try {
await fetchAndSetSubmission(option._id);
} catch (err) {
console.error("Error:", err.response?.data || err.message);
setError("Failed to load this student's submission.");
} finally {
setLoading(false);
}
};
// studentAnswers comes from last_student_answers stored at submit time —
// same "did they actually submit" gate the student's own view uses.
const hasSubmission = submission?.isSubmitted && (submission?.studentAnswers?.length ?? 0) > 0;
const gradePercentage = gradeProgressValue(submission);
// Withholds on pending AND rejected, and refuses a non-numeric grade, so an
// ungraded submission can never render as "NaN%" (EI-1195 / EI-1210).
const showGrade = canShowGrade(submission);
const totalPossiblePoints = Number(submission?.totalScore) || 0;
const setCommentBusy = (questionId, action) => {
setCommentActionState((prev) => {
if (action === null) {
const next = { ...prev };
delete next[questionId];
return next;
}
return { ...prev, [questionId]: action };
});
};
const handleCommentSave = async (questionId, text) => {
const isUpdate = Boolean(comments[questionId]);
setCommentBusy(questionId, "saving");
try {
const save = isUpdate
? TeacherAssignmentAPI.prototype.updateStudentAnswerComment
: TeacherAssignmentAPI.prototype.addStudentAnswerComment;
await save(classCode, assignmentId, selectedStudent._id, questionId, text);
setComments((prev) => ({ ...prev, [questionId]: text }));
enqueueSnackbar(isUpdate ? "Comment updated." : "Comment added.", { variant: "success" });
} catch (err) {
console.error("Error:", err.response?.data || err.message);
enqueueSnackbar("Failed to save comment.", { variant: "error" });
} finally {
setCommentBusy(questionId, null);
}
};
const handleCommentDelete = async (questionId) => {
setCommentBusy(questionId, "deleting");
try {
await TeacherAssignmentAPI.prototype.deleteStudentAnswerComment(
classCode,
assignmentId,
selectedStudent._id,
questionId
);
setComments((prev) => {
const next = { ...prev };
delete next[questionId];
return next;
});
enqueueSnackbar("Comment deleted.", { variant: "success" });
} catch (err) {
console.error("Error:", err.response?.data || err.message);
enqueueSnackbar("Failed to delete comment.", { variant: "error" });
} finally {
setCommentBusy(questionId, null);
}
};
const setPointsBusy = (questionId, busy) => {
setPointsActionState((prev) => {
if (!busy) {
const next = { ...prev };
delete next[questionId];
return next;
}
return { ...prev, [questionId]: "saving" };
});
};
// Edits assignments_collection.question_points_overrides only — the
// underlying question in teacher_questionbank is never touched. The
// backend also recounts total_score/grade/pass-fail for this student's
// already-graded submission, so re-fetch rather than patch locally —
// a partial patch can't reproduce that recount client-side.
const handlePointsSave = async (questionId, points) => {
setPointsBusy(questionId, true);
try {
await TeacherAssignmentAPI.prototype.updateQuestionPoints(assignmentId, questionId, points);
await fetchAndSetSubmission(selectedStudent._id);
enqueueSnackbar("Points updated.", { variant: "success" });
} catch (err) {
console.error("Error:", err.response?.data || err.message);
enqueueSnackbar("Failed to update points.", { variant: "error" });
} finally {
setPointsBusy(questionId, false);
}
};
const setMarkBusy = (questionId, busy) => {
setMarkActionState((prev) => ({ ...prev, [questionId]: busy ? "saving" : undefined }));
};
// Marking ONE student's written answer. Unlike handlePointsSave above — which
// changes what a question is worth for the whole class — this awards what this
// student earned for what they wrote.
//
// Re-fetch rather than patch locally, for the same reason: the backend recomputes
// the grade over the questions that have actually been marked, and a held question
// leaves both the score and the total it is divided by. That is not reproducible
// client-side from the response alone.
const handleMarkSave = async (questionId, points, feedback) => {
setMarkBusy(questionId, true);
try {
await TeacherAssignmentAPI.prototype.markStudentAnswer(
classCode,
assignmentId,
selectedStudent._id,
questionId,
points,
feedback
);
await fetchAndSetSubmission(selectedStudent._id);
enqueueSnackbar("Answer marked.", { variant: "success" });
} catch (err) {
console.error("Error:", err.response?.data || err.message);
enqueueSnackbar(err.response?.data?.detail || "Failed to mark this answer.", { variant: "error" });
} finally {
setMarkBusy(questionId, false);
}
};
return (
<Box>
<Stack direction="row" spacing={2} alignItems="center" sx={{ mb: 3 }}>
<Autocomplete
id="teacher-analytics-individual-answers-student-select"
options={studentOptions}
loading={rosterLoading}
value={selectedStudent}
isOptionEqualToValue={(option, value) => option._id === value._id}
onChange={handleStudentChange}
sx={{ width: 320 }}
renderInput={(params) => (
<TextField {...params} label="Select a student" placeholder="Search by name" size="small" />
)}
/>
</Stack>
{!assignmentId && (
<Alert severity="warning">
We couldn't determine which assignment to load. Please navigate here from the assignments list.
</Alert>
)}
{assignmentId && !selectedStudent && (
<Box sx={{ textAlign: "center", py: 8 }}>
<PersonSearchIcon sx={{ fontSize: 48, color: "text.disabled", mb: 1 }} />
<Typography variant="body1" color="text.secondary">
Select a student above to view their individual answers.
</Typography>
</Box>
)}
<SimpleLoading showLoading={loading} />
{error && (
<Alert severity="error" sx={{ mb: 3 }}>
{error}
</Alert>
)}
{!loading && selectedStudent && submission && (
<Box sx={{ maxWidth: 1400, mx: "auto" }}>
{/* Assignment context — same fields shown on the student's own submission-details
page (SubmissionDetails.jsx): title, description, open/close dates. */}
{submission.assignmentDetails && (
<Paper
elevation={0}
sx={{ p: 3, mb: 3, borderRadius: 2, border: "1px solid", borderColor: "divider" }}
>
<Box sx={{ display: "flex", alignItems: "flex-start", gap: 2, mb: 2 }}>
<AssignmentIcon color="primary" sx={{ fontSize: 32, mt: 0.5 }} />
<Box sx={{ flex: 1 }}>
<Typography variant="h5" fontWeight={600} gutterBottom>
{submission.assignmentDetails.title}
</Typography>
<Typography variant="body1" color="text.secondary">
{submission.assignmentDetails.description}
</Typography>
</Box>
</Box>
<Divider sx={{ my: 2 }} />
<Box sx={{ display: "flex", gap: 3, flexWrap: "wrap" }}>
<Box sx={{ display: "flex", alignItems: "center", gap: 1 }}>
<CalendarTodayIcon fontSize="small" color="action" />
<Typography variant="body2" color="text.secondary">
Opened:{" "}
<strong>{utcToLocalTime(submission.assignmentDetails.date_open)}</strong>
</Typography>
</Box>
<Box sx={{ display: "flex", alignItems: "center", gap: 1 }}>
<CalendarTodayIcon fontSize="small" color="action" />
<Typography variant="body2" color="text.secondary">
Closed:{" "}
<strong>{utcToLocalTime(submission.assignmentDetails.date_close)}</strong>
</Typography>
</Box>
</Box>
</Paper>
)}
{/* Late-submission review-status banners — same wording/iconography as the
student's own submission-details page (SubmissionDetails.jsx). */}
{submission.reviewStatus === "pending" && (
<Alert severity="warning" icon={<HourglassTopIcon />} sx={{ mb: 3 }}>
<Typography fontWeight={600}>Awaiting Your Approval</Typography>
<Typography variant="body2" sx={{ mt: 0.5 }}>
This late submission is pending review. The grade is hidden from the student until you
approve or reject it.
</Typography>
</Alert>
)}
{submission.reviewStatus === "rejected" && (
<Alert severity="error" icon={<BlockIcon />} sx={{ mb: 3 }}>
<Typography fontWeight={600}>Late Submission Rejected</Typography>
<Typography variant="body2" sx={{ mt: 0.5 }}>
You did not accept this late submission.
</Typography>
</Alert>
)}
{hasSubmission ? (
<>
<Typography
variant="h6"
fontWeight={600}
sx={{ mb: 2, display: "flex", alignItems: "center", gap: 1 }}
>
<GradeIcon color="primary" />
Submission Summary
</Typography>
{/* Grade and remarks banner — only when graded and not pending review. */}
{(showGrade || submission.remarks) && (
<Paper elevation={0} sx={{ p: 2.5, mb: 3, borderRadius: 2 }}>
<Box
sx={{
display: "flex",
alignItems: "center",
justifyContent: "space-between",
flexWrap: "wrap",
gap: 2,
}}
>
<Box sx={{ display: "flex", alignItems: "center", gap: 2 }}>
<GradeIcon
sx={{
fontSize: 40,
color: `${getRemarksColor(submission.remarks)}.dark`,
}}
/>
<Box>
<Typography variant="body2" color="text.secondary">
Grade
</Typography>
<Typography
variant="h3"
fontWeight={700}
color={`${getRemarksColor(submission.remarks)}.dark`}
>
{showGrade
? `${formatGradePercent(submission)}%`
: gradeStatusLabel(submission.gradeStatus)}
</Typography>
</Box>
</Box>
{submission.remarks && (
<Chip
icon={<CommentIcon />}
label={
submission.remarks.charAt(0).toUpperCase() +
submission.remarks.slice(1)
}
color={getRemarksColor(submission.remarks)}
size="medium"
sx={{ fontWeight: 600, fontSize: "0.9rem", py: 2.5 }}
/>
)}
</Box>
{showGrade && (
<Box sx={{ mt: 2 }}>
<LinearProgress
variant="determinate"
value={gradePercentage}
color={getRemarksColor(submission.remarks)}
sx={{ height: 8, borderRadius: 4 }}
/>
</Box>
)}
</Paper>
)}
<Grid container spacing={2} sx={{ mb: 4 }}>
{submission.studentScore !== undefined && (
<Grid size={{ xs: 6, sm: 4, md: 2 }}>
<Card variant="outlined" sx={{ height: "100%", borderRadius: 2 }}>
<CardContent sx={{ textAlign: "center" }}>
<TaskAltIcon color="primary" sx={{ fontSize: 28, mb: 1 }} />
<Typography
variant="overline"
color="text.secondary"
sx={{ display: "block" }}
>
Score
</Typography>
<Typography variant="h5" fontWeight={700}>
{submission.studentScore}
{totalPossiblePoints > 0 && (
<Typography
component="span"
variant="body2"
color="text.secondary"
>
{" "}
/ {totalPossiblePoints}
</Typography>
)}
</Typography>
</CardContent>
</Card>
</Grid>
)}
{submission.totalCorrectAnswers !== undefined && (
<Grid size={{ xs: 6, sm: 4, md: 2 }}>
<Card variant="outlined" sx={{ height: "100%", borderRadius: 2 }}>
<CardContent sx={{ textAlign: "center" }}>
<CheckCircleIcon color="success" sx={{ fontSize: 28, mb: 1 }} />
<Typography
variant="overline"
color="text.secondary"
sx={{ display: "block" }}
>
Correct
</Typography>
<Typography variant="h5" fontWeight={700}>
{submission.totalCorrectAnswers}
{submission.totalQuestions !== undefined && (
<Typography
component="span"
variant="body2"
color="text.secondary"
>
{" "}
/ {submission.totalQuestions}
</Typography>
)}
</Typography>
</CardContent>
</Card>
</Grid>
)}
<Grid size={{ xs: 6, sm: 4, md: 2 }}>
<Card variant="outlined" sx={{ height: "100%", borderRadius: 2 }}>
<CardContent sx={{ textAlign: "center" }}>
<AssignmentIcon color="secondary" sx={{ fontSize: 28, mb: 1 }} />
<Typography
variant="overline"
color="text.secondary"
sx={{ display: "block" }}
>
Submitted
</Typography>
<Typography variant="h5" fontWeight={700}>
{submission.totalAnswersSubmitted}
{submission.totalQuestions !== undefined && (
<Typography component="span" variant="body2" color="text.secondary">
{" "}
/ {submission.totalQuestions}
</Typography>
)}
</Typography>
</CardContent>
</Card>
</Grid>
<Grid size={{ xs: 6, sm: 4, md: 2 }}>
<Card variant="outlined" sx={{ height: "100%", borderRadius: 2 }}>
<CardContent sx={{ textAlign: "center" }}>
<ReplayIcon color="warning" sx={{ fontSize: 28, mb: 1 }} />
<Typography
variant="overline"
color="text.secondary"
sx={{ display: "block" }}
>
Attempts
</Typography>
<Typography variant="h5" fontWeight={700}>
{submission.totalAttemptsUsed}
{submission.totalAttemptsAllowed !== undefined && (
<Typography component="span" variant="body2" color="text.secondary">
{" "}
/ {submission.totalAttemptsAllowed}
</Typography>
)}
</Typography>
</CardContent>
</Card>
</Grid>
{submission.remainingTime && (
<Grid size={{ xs: 6, sm: 4, md: 2 }}>
<Card variant="outlined" sx={{ height: "100%", borderRadius: 2 }}>
<CardContent sx={{ textAlign: "center" }}>
<TimerIcon color="action" sx={{ fontSize: 28, mb: 1 }} />
<Typography
variant="overline"
color="text.secondary"
sx={{ display: "block" }}
>
Time Left
</Typography>
<Typography variant="h6" fontWeight={700}>
{submission.remainingTime}
</Typography>
</CardContent>
</Card>
</Grid>
)}
</Grid>
<Box sx={{ mb: 3 }}>
<Typography
variant="h6"
fontWeight={600}
sx={{ mb: 2, display: "flex", alignItems: "center", gap: 1 }}
>
<AssignmentIcon color="primary" />
Student's Answers
</Typography>
</Box>
<SubmissionAnswersList
questions={submission.details}
answers={submission.studentAnswers}
comments={comments}
commentActionState={commentActionState}
onCommentSave={handleCommentSave}
onCommentDelete={handleCommentDelete}
editablePoints
pointsActionState={pointsActionState}
onPointsSave={handlePointsSave}
canMark
markActionState={markActionState}
onMarkSave={handleMarkSave}
/>
</>
) : (
<Alert severity="info">
{selectedStudent.label.split(", ").reverse().join(" ")} has not submitted answers for this
assignment.
</Alert>
)}
</Box>
)}
</Box>
);
};
export default IndividualAnswers;
|