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import { useNavigate } from "react-router-dom";
import { useDispatch } from "react-redux";
import { alpha, useTheme } from "@mui/material/styles";
import {
Box,
Button,
Card,
CardActions,
CardContent,
Chip,
IconButton,
Stack,
Tooltip,
Typography,
} from "@mui/material";
import PeopleIcon from "@mui/icons-material/People";
import HourglassEmptyIcon from "@mui/icons-material/HourglassEmpty";
import TagIcon from "@mui/icons-material/Tag";
import ArrowForwardRoundedIcon from "@mui/icons-material/ArrowForwardRounded";
import CameraAltIcon from "@mui/icons-material/CameraAlt";
import SearchOffIcon from "@mui/icons-material/SearchOff";
import { ClassCardBanner } from "@/utils/components";
import { seededRandom } from "@/utils/components/class-card-banner/generateClassCardShapes";
import { _fetchSpecificClassByCode } from "@/store/slices/teacher/TeacherSpecificClass";
import { filterClassesBySearch } from "@/app/teacher-page/components/class-list/filterClassesBySearch";
import ClassPhotoDialog from "./ClassPhotoDialog";
// The banner falls back to a flat fill via the shared ClassCardBanner, whose
// shape scatter is already unique per class code — used only when the class
// has no uploaded cover photo (entry.class_photo). Every card used to fill
// with the exact same theme.palette.primary.main, which made the class grid
// read as identical tiles. The fill now rotates through the theme's own blue
// shades (primary + secondary, light/main/dark), seeded the same way as the
// shapes so a given class always gets the same shade across reloads — still
// on-brand, just not a single flat repeat. The "View Class" button keeps the
// theme's actual primary color — that's a CTA, not decoration.
const ACCENT_COLOR_KEY = "primary";
const BANNER_HEIGHT = 120;
function bannerAccentFor(seed, theme) {
const rand = seededRandom(`${seed || "class"}-accent`);
const shades = [
theme.palette.primary.light,
theme.palette.primary.main,
theme.palette.primary.dark,
theme.palette.secondary.light,
theme.palette.secondary.main,
theme.palette.secondary.dark,
];
return shades[Math.floor(rand() * shades.length)];
}
function EmptyState() {
return (
<Box sx={{ py: 10, display: "flex", flexDirection: "column", alignItems: "center", gap: 1.5 }}>
<Box
sx={{
width: 72,
height: 72,
borderRadius: "50%",
bgcolor: "action.hover",
display: "flex",
alignItems: "center",
justifyContent: "center",
}}
>
<SearchOffIcon sx={{ fontSize: 36, color: "text.disabled" }} />
</Box>
<Typography variant="h6" fontWeight={600} color="text.secondary">
No classes found
</Typography>
<Typography variant="body2" color="text.disabled" textAlign="center">
Try adjusting your semester filter
</Typography>
</Box>
);
}
function ClassCard({ entry, index, onView }) {
const theme = useTheme();
const [photoDialogOpen, setPhotoDialogOpen] = useState(false);
const enrolled = entry.students?.filter((s) => s.status === "Enrolled").length ?? 0;
const pending = entry.students?.filter((s) => s.status === "Pending").length ?? 0;
const semLabel = entry.semester.charAt(0).toUpperCase() + entry.semester.slice(1);
const accent = theme.palette[ACCENT_COLOR_KEY];
const glowShadow = theme.customShadows?.[ACCENT_COLOR_KEY] ?? theme.customShadows?.z16;
const bannerAccent = bannerAccentFor(entry.class_code || entry.title || "", theme);
return (
<Card
elevation={0}
sx={{
borderRadius: "12px",
overflow: "hidden",
display: "flex",
flexDirection: "column",
height: "100%",
border: (t) => `1px solid ${alpha(t.palette.grey[500], 0.14)}`,
transition: theme.transitions.create(["transform", "box-shadow"], { duration: 220 }),
"&:hover": { transform: "translateY(-4px)", boxShadow: glowShadow },
}}
>
<Box
sx={{
position: "relative",
"&:hover .teacher-class-card-photo-edit-btn": { opacity: 1 },
}}
>
{entry.class_photo ? (
<Box sx={{ position: "relative", height: BANNER_HEIGHT }}>
<Box
component="img"
src={entry.class_photo}
alt={`${entry.title} cover`}
sx={{ width: "100%", height: "100%", objectFit: "cover", display: "block" }}
/>
<Chip
label={semLabel}
size="small"
id={`teacher-classes-card-semester-${index}`}
sx={{
position: "absolute",
top: 12,
right: 12,
bgcolor: (t) => alpha(t.palette.background.paper, 0.92),
color: "text.primary",
fontWeight: 700,
fontSize: "0.64rem",
height: 22,
backdropFilter: "blur(4px)",
}}
/>
</Box>
) : (
<ClassCardBanner
seed={entry.class_code || entry.title || ""}
accentMain={bannerAccent}
label={semLabel}
labelId={`teacher-classes-card-semester-${index}`}
ariaLabel={`${entry.title} cover`}
height={BANNER_HEIGHT}
/>
)}
<Tooltip title={entry.class_photo ? "Change cover photo" : "Add cover photo"} arrow>
<IconButton
id={`teacher-classes-card-photo-edit-${index}`}
className="teacher-class-card-photo-edit-btn"
size="small"
onClick={() => setPhotoDialogOpen(true)}
sx={{
position: "absolute",
top: 8,
left: 8,
opacity: 0,
transition: theme.transitions.create("opacity", { duration: 150 }),
bgcolor: (t) => alpha(t.palette.common.black, 0.45),
color: "#fff",
"&:hover": { bgcolor: (t) => alpha(t.palette.common.black, 0.65) },
}}
>
<CameraAltIcon fontSize="small" />
</IconButton>
</Tooltip>
</Box>
<ClassPhotoDialog
open={photoDialogOpen}
onClose={() => setPhotoDialogOpen(false)}
classUUID={entry._id}
currentPhotoUrl={entry.class_photo}
/>
<CardContent sx={{ flex: 1, pt: 2, pb: 1 }}>
<Typography
id={`teacher-classes-card-title-${index}`}
variant="subtitle1"
fontWeight={700}
noWrap
title={entry.title}
sx={{ fontFamily: theme.typography.fontSecondaryFamily, mb: 0.25 }}
>
{entry.title}
<Typography component="span" variant="inherit" color="text.secondary" fontWeight={400}>
{" "}
({entry.section})
</Typography>
</Typography>
<Stack
id={`teacher-classes-card-code-${index}`}
direction="row"
alignItems="center"
spacing={0.4}
sx={{ mb: 1.5, color: "text.secondary" }}
>
<TagIcon sx={{ fontSize: 13 }} />
<Typography variant="subtitle1" sx={{ fontFamily: "monospace" }}>
{entry.class_code}
</Typography>
</Stack>
<Stack direction="row" spacing={1} flexWrap="wrap" useFlexGap>
<Tooltip title="Enrolled students" arrow>
<Chip
variant="soft"
color="success"
size="small"
icon={<PeopleIcon sx={{ fontSize: "14px !important" }} />}
label={<span id="teacher-class-card-accepted-students">{enrolled} Enrolled</span>}
sx={{ fontWeight: 600, fontSize: "0.7rem" }}
/>
</Tooltip>
<Tooltip title="Pending students" arrow>
<Chip
variant="soft"
color="warning"
size="small"
icon={<HourglassEmptyIcon sx={{ fontSize: "14px !important" }} />}
label={<span id="teacher-class-card-pending-students">{pending} Pending</span>}
sx={{ fontWeight: 600, fontSize: "0.7rem" }}
/>
</Tooltip>
</Stack>
</CardContent>
<CardActions sx={{ px: 2.5, pb: 2.5, pt: 0 }}>
<Button
id={`teacher-classes-card-button-view-${index}`}
variant="contained"
disableElevation
size="small"
fullWidth
endIcon={<ArrowForwardRoundedIcon sx={{ fontSize: 16 }} />}
onClick={() => onView(entry.class_code)}
sx={{
textTransform: "none",
fontWeight: 700,
borderRadius: "8px",
bgcolor: accent.main,
color: accent.contrastText,
"&:hover": { bgcolor: accent.dark },
}}
>
View Class
</Button>
</CardActions>
</Card>
);
}
export default function ClassCards({ selectedSemester, search, classList }) {
const navigate = useNavigate();
const dispatch = useDispatch();
// Single source of truth: the same unit-tested helper the chip count
// uses (semester + free-text search, incl. the combined "title (section)"
// card-title display) so the rendered cards and the count never diverge.
const filtered = useMemo(
() => filterClassesBySearch(classList, search, selectedSemester),
[classList, selectedSemester, search]
);
const handleView = (classCode) => {
dispatch(_fetchSpecificClassByCode(classCode)).then((res) => {
// Modified by Allan Ninal — see the student card: a rejected action's
// payload is the error body, so this opened a class that failed to load.
if (!_fetchSpecificClassByCode.fulfilled.match(res)) return;
navigate(`/teacher/classes/${classCode}`);
});
};
Iif (filtered.length === 0) return <EmptyState />;
return (
<Box
sx={{
display: "grid",
gridTemplateColumns: "repeat(auto-fill, minmax(268px, 1fr))",
gap: { xs: 1.5, sm: 2, md: 2.5 },
}}
>
{filtered.map((entry, idx) => (
<ClassCard key={entry.class_code} entry={entry} index={idx} onView={handleView} />
))}
</Box>
);
}
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