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import "./DragAndDropEditor.scss";
import {
Alert,
Box,
Button,
Card,
CardContent,
Checkbox,
Chip,
Collapse,
FormControlLabel,
IconButton,
LinearProgress,
Paper,
Stack,
Tooltip,
Typography,
} from "@mui/material";
import { useTheme } from "@mui/material/styles";
import ReadOnlyMathEditor from "@/utils/components/TinyMCETextEditorReadOnly";
import UnsavedChangesDialog from "@/utils/components/UnsavedChangesDialog";
import tinyMCEUtility from "@/utils/helpers/tinyMCEUtility";
// Icons
import AddIcon from "@mui/icons-material/Add";
import DeleteOutlineIcon from "@mui/icons-material/DeleteOutline";
import EditIcon from "@mui/icons-material/Edit";
import CheckCircleIcon from "@mui/icons-material/CheckCircle";
import CheckCircleOutlineIcon from "@mui/icons-material/CheckCircleOutline";
import ExpandMoreIcon from "@mui/icons-material/ExpandMore";
import ExpandLessIcon from "@mui/icons-material/ExpandLess";
import SaveIcon from "@mui/icons-material/Save";
import CloseIcon from "@mui/icons-material/Close";
import HelpOutlineIcon from "@mui/icons-material/HelpOutline";
import DragIndicatorIcon from "@mui/icons-material/DragIndicator";
import SettingsIcon from "@mui/icons-material/Settings";
import NoteAddIcon from "@mui/icons-material/NoteAdd";
import RestartAltIcon from "@mui/icons-material/RestartAlt";
import DragDropFeature from "./DragDrop";
import {
useQuestionForm,
TextEditorDialog,
QuestionSettings,
QuickTipsCard,
getClassificationProgress,
editorContainerSx,
editorHeaderSx,
cardHeaderHoverSx,
editorCardSx,
contentPreviewSx,
emptyStateSx,
neutralSurfaceSx,
tipsCardSx,
} from "../utils";
import { sanitizeRichText } from "@/utils/helpers/sanitizeHtml";
const unwrapBlock = (html) => {
const el = document.createElement("div");
el.innerHTML = html;
if (el.children.length === 1 && el.children[0].tagName === "P") {
return el.children[0].innerHTML;
}
return html;
};
const MainV2 = ({ role = "teacher" }) => {
const {
displayError,
setDisplayError,
editQuestion,
isEditMode,
setEditMode,
questionText,
setQuestionText,
questionTextEditor,
setQuestionTextEditor,
showQuestionTextEditor,
questionDetailsText,
setQuestionDetailsText,
questionDetailsTextEditor,
setQuestionDetailsTextEditor,
showQuestionDetailsTextEditor,
answerDetailsText,
setAnswerDetailsText,
answerDetailsTextEditor,
setAnswerDetailsTextEditor,
showAnswerDetailsTextEditor,
values,
touched,
errors,
handleChange,
handleBlur,
setFieldValue,
setFieldTouched,
handleCancel,
clickQuestionButton,
saveQuestion,
cancelQuestion,
clickQuestionDetailsButton,
saveQuestionDetails,
cancelQuestionDetails,
clickEditAnswerDetails,
saveAnswerDetails,
cancelEditAnswerDetails,
deleteAnswerDetails,
submitQuestion,
buildBasePayload,
loadEditData,
resetFields,
handleImageUpload,
SaveProgress,
navigationBlocker,
} = useQuestionForm(role);
const { dragDropHTML, regexBlank, regexDropHere } = tinyMCEUtility();
const theme = useTheme();
// Expandable sections
const [questionDetailsExpanded, setQuestionDetailsExpanded] = useState(false);
const [answerDetailsExpanded, setAnswerDetailsExpanded] = useState(false);
const [settingsExpanded, setSettingsExpanded] = useState(true);
// Drag-and-drop specific state
const [isBlanks, setBlanks] = useState([]);
const [isChoices, setChoices] = useState([]);
const [choiceTextEditor, setChoiceTextEditor] = useState("");
const [showChoiceTextEditor, setShowChoiceTextEditor] = useState(false);
const [editingChoiceIndex, setEditingChoiceIndex] = useState(null);
// Grading order: by default each drop zone is checked against the answer
// authored FOR that specific zone (position-sensitive — see the backend's
// _POSITION_SENSITIVE_TYPES). This lets a teacher opt a question into
// unordered grading instead, where a correct answer counts wherever the
// student dropped it among the zones.
const [isUnordered, setUnordered] = useState(false);
// Question conversion (specific to drag-and-drop)
const dragDropToString = (question) => {
return regexDropHere ? question.replace(regexDropHere, "__blank__") : question;
};
const stringToDragDrop = (question) => {
return regexBlank ? question.replace(regexBlank, dragDropHTML) : question;
};
// Progress calculation
const getProgress = () => {
let progress = 0;
if (questionText) progress += 25;
if (isChoices.length > 0) progress += 25;
if (isBlanks.length > 0 && isBlanks.some((b) => b.answer)) progress += 25;
progress += (getClassificationProgress(values) / 100) * 25;
return Math.round(progress);
};
// Choice handlers
const clickAddChoice = () => {
setShowChoiceTextEditor(true);
setChoiceTextEditor("");
setEditingChoiceIndex(null);
setEditMode(false);
};
const clickEditChoice = (choice, index) => {
setShowChoiceTextEditor(true);
setChoiceTextEditor(choice.text);
setEditingChoiceIndex(index);
setEditMode(true);
};
const cancelChoice = () => {
setChoiceTextEditor("");
setShowChoiceTextEditor(false);
setEditingChoiceIndex(null);
setEditMode(false);
};
const saveChoice = () => {
if (isEditMode && editingChoiceIndex !== null) {
setChoices((prev) =>
prev.map((choice, idx) => (idx === editingChoiceIndex ? { ...choice, text: choiceTextEditor } : choice))
);
} else {
// Derive the new id from the current max (not length) so it can't
// collide with a surviving choice after a delete. (EI-2906)
setChoices((prev) => {
const nextId = prev.reduce((max, c) => Math.max(max, (c.id ?? -1) + 1), 0);
return [...prev, { id: nextId, text: choiceTextEditor }];
});
}
setChoiceTextEditor("");
setShowChoiceTextEditor(false);
setEditingChoiceIndex(null);
setEditMode(false);
};
const deleteChoice = (index) => {
const deletedText = isChoices[index].text;
setChoices((prev) => prev.filter((_, i) => i !== index));
setBlanks((prev) => prev.map((blank) => (blank.answer === deletedText ? { ...blank, answer: "" } : blank)));
};
// Reset all values
const handleReset = () => {
setQuestionText("");
setQuestionDetailsText("");
setAnswerDetailsText("");
setBlanks([]);
setChoices([]);
setUnordered(false);
setDisplayError({ status: false, message: "" });
resetFields();
};
// Validation
const hasValidChoices = () => {
if (isChoices.length === 0) {
setDisplayError({ status: true, message: "Please add at least one choice." });
return false;
}
if (isBlanks.length === 0) {
setDisplayError({ status: true, message: "Please add at least one blank in the question." });
return false;
}
setDisplayError({ status: false, message: "" });
return true;
};
// Submit handler - SAME PAYLOAD STRUCTURE
const createNewQuestion = async () => {
if (!hasValidChoices()) return;
const basePayload = buildBasePayload("Drag-and-Drop", [...isBlanks]);
const payload = {
...basePayload,
question: dragDropToString(questionText),
choices: [...isChoices],
correctAnswer: {
...basePayload.correctAnswer,
unordered: isUnordered,
},
};
await submitQuestion(payload, () => {
setBlanks([]);
setChoices([]);
setUnordered(false);
});
};
// Dialog management
const getActiveDialog = () => {
if (showQuestionTextEditor)
return {
type: "question",
content: questionTextEditor,
setContent: setQuestionTextEditor,
save: saveQuestion,
cancel: cancelQuestion,
questionTypes: ["dragAndDrop"],
};
if (showChoiceTextEditor)
return {
type: "choice",
content: choiceTextEditor,
setContent: setChoiceTextEditor,
save: saveChoice,
cancel: cancelChoice,
questionTypes: [],
disabledToolbarButtons: ["matheditor", "graph2d", "insertimage", "inserttable"],
};
Iif (showAnswerDetailsTextEditor)
return {
type: "answerDetails",
content: answerDetailsTextEditor,
setContent: setAnswerDetailsTextEditor,
save: saveAnswerDetails,
cancel: cancelEditAnswerDetails,
questionTypes: [],
};
Iif (showQuestionDetailsTextEditor)
return {
type: "questionDetails",
content: questionDetailsTextEditor,
setContent: setQuestionDetailsTextEditor,
save: saveQuestionDetails,
cancel: cancelQuestionDetails,
questionTypes: [],
};
return null;
};
const activeDialog = getActiveDialog();
// Load edit data
useEffect(() => {
loadEditData((data) => {
setQuestionText(stringToDragDrop(data.question));
setBlanks([...data.correctAnswer.answers]);
setChoices([...data.choices]);
setUnordered(Boolean(data.correctAnswer?.unordered));
});
}, []);
return (
<Box className="dragdrop-v2-container" sx={editorContainerSx()}>
<SaveProgress />
<UnsavedChangesDialog blocker={navigationBlocker} />
{/* Dialog */}
{activeDialog && (
<TextEditorDialog
open={true}
editorType={activeDialog.type}
isEditMode={isEditMode}
editContent={activeDialog.content}
setEditContent={activeDialog.setContent}
onSave={activeDialog.save}
onCancel={activeDialog.cancel}
questionTypes={activeDialog.questionTypes}
onImageUpload={handleImageUpload}
disabledToolbarButtons={activeDialog.disabledToolbarButtons ?? []}
/>
)}
{/* Header */}
<Paper className="dragdrop-v2-header" elevation={0} sx={editorHeaderSx()}>
<Box className="dragdrop-v2-header-content">
<Box className="dragdrop-v2-header-left">
<DragIndicatorIcon sx={{ fontSize: 28, color: "primary.main" }} />
<Box>
<Typography variant="h5" fontWeight={600}>
{editQuestion ? "Edit Question" : "Create Drag-and-Drop Question"}
</Typography>
<Typography variant="body2" color="text.secondary">
{editQuestion
? "Update your question details"
: "Build an interactive drag-and-drop question"}
</Typography>
</Box>
</Box>
<Box className="dragdrop-v2-header-actions">
<Button variant="outlined" color="inherit" onClick={handleCancel} startIcon={<CloseIcon />}>
Cancel
</Button>
<Button variant="outlined" color="warning" onClick={handleReset} startIcon={<RestartAltIcon />}>
Reset
</Button>
<Box sx={{ display: "flex", alignItems: "center", gap: 0.5 }}>
<Button
variant="contained"
color="primary"
onClick={createNewQuestion}
startIcon={<SaveIcon />}
>
{editQuestion ? "Update" : "Save Question"}
</Button>
<Tooltip
title={
<Box sx={{ p: 1 }}>
<Typography variant="subtitle2" sx={{ fontWeight: 600, mb: 1 }}>
Required Fields:
</Typography>
<Stack spacing={0.5}>
<Typography
variant="caption"
sx={{ display: "flex", alignItems: "center", gap: 0.5 }}
>
{questionText ? (
<CheckCircleIcon fontSize="small" color="success" />
) : (
<CheckCircleOutlineIcon fontSize="small" />
)}
Question with drop zones
</Typography>
<Typography
variant="caption"
sx={{ display: "flex", alignItems: "center", gap: 0.5 }}
>
{isChoices.length > 0 ? (
<CheckCircleIcon fontSize="small" color="success" />
) : (
<CheckCircleOutlineIcon fontSize="small" />
)}
Draggable choices added
</Typography>
<Typography
variant="caption"
sx={{ display: "flex", alignItems: "center", gap: 0.5 }}
>
{isBlanks.length > 0 && isBlanks.some((b) => b.answer) ? (
<CheckCircleIcon fontSize="small" color="success" />
) : (
<CheckCircleOutlineIcon fontSize="small" />
)}
Correct answers placed
</Typography>
<Typography
variant="caption"
sx={{ display: "flex", alignItems: "center", gap: 0.5 }}
>
{values.assignmentType ? (
<CheckCircleIcon fontSize="small" color="success" />
) : (
<CheckCircleOutlineIcon fontSize="small" />
)}
Assignment type
</Typography>
<Typography
variant="caption"
sx={{ display: "flex", alignItems: "center", gap: 0.5 }}
>
{values.questionPoints ? (
<CheckCircleIcon fontSize="small" color="success" />
) : (
<CheckCircleOutlineIcon fontSize="small" />
)}
Question points
</Typography>
</Stack>
</Box>
}
arrow
placement="bottom-end"
>
<IconButton size="small" sx={{ color: "primary.main" }}>
<HelpOutlineIcon fontSize="small" />
</IconButton>
</Tooltip>
</Box>
</Box>
</Box>
{/* Progress bar */}
<Box className="dragdrop-v2-progress">
<LinearProgress
variant="determinate"
value={getProgress()}
color="success"
sx={{ height: 6, borderRadius: 3 }}
/>
<Typography variant="caption" color="text.secondary" sx={{ mt: 0.5 }}>
{getProgress()}% complete
</Typography>
</Box>
</Paper>
{/* Error Alert */}
{displayError.status && (
<Alert
severity="error"
sx={{ mx: 3, mt: 2 }}
onClose={() => setDisplayError({ status: false, message: "" })}
>
{displayError.message}
</Alert>
)}
{/* Question Settings Validation Errors */}
{Object.keys(errors).some((key) => touched[key]) && (
<Alert severity="error" sx={{ mx: 3, mt: 2 }}>
<Typography variant="body2" fontWeight={600} sx={{ mb: 0.5 }}>
Please complete the required question settings:
</Typography>
<Stack spacing={0.25}>
{Object.entries(errors).map(([key, message]) =>
touched[key] ? (
<Typography key={key} variant="caption">
• {message}
</Typography>
) : null
)}
</Stack>
</Alert>
)}
{/* Main Content */}
<Box className="dragdrop-v2-main">
{/* Left Panel - Question & Choices */}
<Box className="dragdrop-v2-left-panel">
{/* Question Card */}
<Card className="dragdrop-v2-card" sx={editorCardSx(theme)}>
<CardContent>
<Box className="dragdrop-v2-card-header">
<Box className="dragdrop-v2-card-title">
<HelpOutlineIcon color="primary" />
<Typography variant="h6">Question</Typography>
{questionText && <CheckCircleIcon color="success" fontSize="small" />}
</Box>
<Button
variant={questionText ? "outlined" : "contained"}
size="small"
startIcon={questionText ? <EditIcon /> : <AddIcon />}
onClick={clickQuestionButton}
>
{questionText ? "Edit" : "Add Question"}
</Button>
</Box>
{questionText ? (
<Paper
variant="outlined"
className="dragdrop-v2-content-preview"
sx={contentPreviewSx()}
>
<DragDropFeature
isQuestionText={questionText}
isChoices={isChoices}
setChoices={setChoices}
isBlanks={isBlanks}
setBlanks={setBlanks}
/>
</Paper>
) : (
<Box className="dragdrop-v2-empty-state" sx={emptyStateSx(theme)}>
<NoteAddIcon sx={{ fontSize: 48, color: "action.disabled" }} />
<Typography color="text.secondary">
Click "Add Question" to write your question with drop zones
</Typography>
<Typography variant="caption" color="text.secondary">
Use the drag-and-drop button in the editor to add drop zones
</Typography>
</Box>
)}
{/* Question Details - Collapsible */}
<Box sx={{ mt: 2 }}>
<Button
size="small"
onClick={() => setQuestionDetailsExpanded(!questionDetailsExpanded)}
endIcon={questionDetailsExpanded ? <ExpandLessIcon /> : <ExpandMoreIcon />}
sx={{ textTransform: "none" }}
>
Question Details (Optional)
{questionDetailsText && (
<CheckCircleIcon color="success" fontSize="small" sx={{ ml: 1 }} />
)}
</Button>
<Collapse in={questionDetailsExpanded}>
<Box sx={{ mt: 1 }}>
{questionDetailsText ? (
<Paper
variant="outlined"
className="dragdrop-v2-content-preview"
sx={contentPreviewSx()}
>
<ReadOnlyMathEditor content={questionDetailsText} />
<IconButton
size="small"
onClick={clickQuestionDetailsButton}
sx={{ position: "absolute", top: 8, right: 8 }}
>
<EditIcon fontSize="small" />
</IconButton>
</Paper>
) : (
<Button
variant="text"
size="small"
startIcon={<AddIcon />}
onClick={clickQuestionDetailsButton}
>
Add details or hints
</Button>
)}
</Box>
</Collapse>
</Box>
</CardContent>
</Card>
{/* Choices Card */}
<Card className="dragdrop-v2-card" sx={editorCardSx(theme)}>
<CardContent>
<Box className="dragdrop-v2-card-header">
<Box className="dragdrop-v2-card-title">
<DragIndicatorIcon color="primary" />
<Typography variant="h6">Draggable Choices</Typography>
<Chip
size="small"
label={`${isChoices.length} choice${isChoices.length !== 1 ? "s" : ""}`}
color={isChoices.length > 0 ? "success" : "default"}
variant={isChoices.length > 0 ? "filled" : "outlined"}
sx={{
fontWeight: 500,
color: isChoices.length > 0 ? "white" : "text.primary",
}}
/>
</Box>
</Box>
{isBlanks.length > 1 && (
<Box sx={{ mb: 2 }}>
<FormControlLabel
control={
<Checkbox
id="drag-and-drop-unordered-grading"
data-testid="drag-and-drop-unordered-checkbox"
checked={isUnordered}
onChange={(e) => setUnordered(e.target.checked)}
/>
}
label="Grade drop zones unordered"
/>
<Typography variant="caption" color="text.secondary" sx={{ display: "block" }}>
{isUnordered
? "A correct answer counts in ANY drop zone, not just the one it was assigned to."
: "Each drop zone is checked against the answer assigned to that specific zone."}
</Typography>
</Box>
)}
{isChoices.length > 0 ? (
<Box className="dragdrop-v2-choices-grid">
{isChoices.map((choice, index) => (
<Paper
key={index}
className="dragdrop-v2-choice-item"
variant="outlined"
sx={neutralSurfaceSx(theme)}
>
<DragIndicatorIcon
fontSize="small"
sx={{ color: "grey.400", mr: 1, flexShrink: 0 }}
/>
<Box
dangerouslySetInnerHTML={{
__html: sanitizeRichText(unwrapBlock(choice.text)),
}}
sx={{
flex: 1,
fontSize: "1.1rem",
lineHeight: "normal",
"& p": { margin: 0, padding: 0 },
"& .mfe-formula": { color: "inherit" },
}}
/>
<Box className="dragdrop-v2-choice-actions">
<IconButton size="small" onClick={() => clickEditChoice(choice, index)}>
<EditIcon fontSize="small" />
</IconButton>
<IconButton
size="small"
onClick={() => deleteChoice(index)}
color="error"
>
<DeleteOutlineIcon fontSize="small" />
</IconButton>
</Box>
</Paper>
))}
</Box>
) : (
<Box className="dragdrop-v2-empty-state" sx={{ py: 3, ...emptyStateSx(theme) }}>
<DragIndicatorIcon sx={{ fontSize: 40, color: "action.disabled" }} />
<Typography color="text.secondary">No choices added yet</Typography>
</Box>
)}
<Button
variant="outlined"
startIcon={<AddIcon />}
onClick={clickAddChoice}
fullWidth
sx={{ mt: 2 }}
>
Add New Choice
</Button>
</CardContent>
</Card>
{/* Answer Details Card - Collapsible */}
<Card className="dragdrop-v2-card" sx={editorCardSx(theme)}>
<CardContent>
<Box
className="dragdrop-v2-card-header clickable"
onClick={() => setAnswerDetailsExpanded(!answerDetailsExpanded)}
sx={cardHeaderHoverSx(theme)}
>
<Box className="dragdrop-v2-card-title">
<NoteAddIcon color="primary" />
<Typography variant="h6">Answer Explanation (Optional)</Typography>
{answerDetailsText && <CheckCircleIcon color="success" fontSize="small" />}
</Box>
{answerDetailsExpanded ? <ExpandLessIcon /> : <ExpandMoreIcon />}
</Box>
<Collapse in={answerDetailsExpanded}>
<Box sx={{ mt: 2 }}>
{answerDetailsText ? (
<Paper
variant="outlined"
className="dragdrop-v2-content-preview"
sx={{ position: "relative", ...contentPreviewSx() }}
>
<ReadOnlyMathEditor content={answerDetailsText} />
<Box
sx={{
position: "absolute",
top: 8,
right: 8,
display: "flex",
gap: 0.5,
}}
>
<IconButton
size="small"
onClick={() => clickEditAnswerDetails(answerDetailsText)}
>
<EditIcon fontSize="small" />
</IconButton>
<IconButton size="small" onClick={deleteAnswerDetails} color="error">
<DeleteOutlineIcon fontSize="small" />
</IconButton>
</Box>
</Paper>
) : (
<Button
variant="outlined"
startIcon={<AddIcon />}
onClick={() => clickEditAnswerDetails("")}
fullWidth
>
Add Answer Explanation
</Button>
)}
</Box>
</Collapse>
</CardContent>
</Card>
</Box>
{/* Right Panel - Tips + Settings */}
<Box className="dragdrop-v2-right-panel">
<QuickTipsCard
className="dragdrop-v2-card dragdrop-v2-tips-card"
sx={{ ...editorCardSx(theme), ...tipsCardSx(theme) }}
tips={[
"Use the drag-and-drop button in the editor to add drop zones",
"Add choices that students can drag into the blanks",
"Drag choices to the correct drop zones to set answers",
"You can add more choices than blanks as distractors",
]}
/>
<Card className="dragdrop-v2-card dragdrop-v2-settings-card" sx={editorCardSx(theme)}>
<CardContent>
<Box
className="dragdrop-v2-card-header clickable"
onClick={() => setSettingsExpanded(!settingsExpanded)}
sx={cardHeaderHoverSx(theme)}
>
<Box className="dragdrop-v2-card-title">
<SettingsIcon color="primary" />
<Typography variant="h6">Question Settings</Typography>
</Box>
{settingsExpanded ? <ExpandLessIcon /> : <ExpandMoreIcon />}
</Box>
<Collapse in={settingsExpanded}>
<Box sx={{ mt: 2 }}>
<QuestionSettings
values={values}
touched={touched}
errors={errors}
handleChange={handleChange}
handleBlur={handleBlur}
setFieldValue={setFieldValue}
setFieldTouched={setFieldTouched}
/>
</Box>
</Collapse>
</CardContent>
</Card>
</Box>
</Box>
</Box>
);
};
export default MainV2;
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