feat(web): add kanban board page with drag-and-drop (#478)
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Co-authored-by: Jason Woltje <jason@diversecanvas.com>
Co-committed-by: Jason Woltje <jason@diversecanvas.com>
This commit was merged in pull request #478.
This commit is contained in:
2026-02-23 04:26:25 +00:00
committed by jason.woltje
parent ee2ddfc8b8
commit 172ed1d40f
5 changed files with 566 additions and 5 deletions

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@@ -18,6 +18,7 @@
"@dnd-kit/core": "^6.3.1",
"@dnd-kit/sortable": "^9.0.0",
"@dnd-kit/utilities": "^3.2.2",
"@hello-pangea/dnd": "^18.0.1",
"@mosaic/shared": "workspace:*",
"@mosaic/ui": "workspace:*",
"@tanstack/react-query": "^5.90.20",

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@@ -0,0 +1,469 @@
"use client";
import { useState, useEffect, useCallback } from "react";
import type { ReactElement } from "react";
import { DragDropContext, Droppable, Draggable } from "@hello-pangea/dnd";
import type {
DropResult,
DroppableProvided,
DraggableProvided,
DraggableStateSnapshot,
} from "@hello-pangea/dnd";
import { MosaicSpinner } from "@/components/ui/MosaicSpinner";
import { fetchTasks, updateTask } from "@/lib/api/tasks";
import { useWorkspaceId } from "@/lib/hooks";
import type { Task } from "@mosaic/shared";
import { TaskStatus, TaskPriority } from "@mosaic/shared";
/* ---------------------------------------------------------------------------
Column configuration
--------------------------------------------------------------------------- */
interface ColumnConfig {
status: TaskStatus;
label: string;
accent: string;
}
const COLUMNS: ColumnConfig[] = [
{ status: TaskStatus.NOT_STARTED, label: "To Do", accent: "var(--ms-blue-400)" },
{ status: TaskStatus.IN_PROGRESS, label: "In Progress", accent: "var(--ms-amber-400)" },
{ status: TaskStatus.PAUSED, label: "Paused", accent: "var(--ms-purple-400)" },
{ status: TaskStatus.COMPLETED, label: "Done", accent: "var(--ms-teal-400)" },
{ status: TaskStatus.ARCHIVED, label: "Archived", accent: "var(--muted)" },
];
/* ---------------------------------------------------------------------------
Priority badge helper
--------------------------------------------------------------------------- */
interface PriorityStyle {
label: string;
bg: string;
color: string;
}
function getPriorityStyle(priority: TaskPriority): PriorityStyle {
switch (priority) {
case TaskPriority.HIGH:
return { label: "High", bg: "rgba(229,72,77,0.15)", color: "var(--danger)" };
case TaskPriority.MEDIUM:
return { label: "Medium", bg: "rgba(245,158,11,0.15)", color: "var(--warn)" };
case TaskPriority.LOW:
return { label: "Low", bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
default:
return { label: String(priority), bg: "rgba(143,157,183,0.15)", color: "var(--muted)" };
}
}
/* ---------------------------------------------------------------------------
Task Card
--------------------------------------------------------------------------- */
interface TaskCardProps {
task: Task;
provided: DraggableProvided;
snapshot: DraggableStateSnapshot;
columnAccent: string;
}
function TaskCard({ task, provided, snapshot, columnAccent }: TaskCardProps): ReactElement {
const [hovered, setHovered] = useState(false);
const priorityStyle = getPriorityStyle(task.priority);
return (
<div
ref={provided.innerRef}
{...provided.draggableProps}
{...provided.dragHandleProps}
onMouseEnter={() => {
setHovered(true);
}}
onMouseLeave={() => {
setHovered(false);
}}
style={{
background: "var(--surface)",
border: `1px solid ${hovered || snapshot.isDragging ? columnAccent : "var(--border)"}`,
borderRadius: "var(--r)",
padding: 12,
marginBottom: 8,
cursor: "grab",
transition: "border-color 0.15s, box-shadow 0.15s",
boxShadow: snapshot.isDragging ? "var(--shadow-lg)" : "none",
...provided.draggableProps.style,
}}
>
{/* Title */}
<div
style={{
fontWeight: 600,
color: "var(--text)",
fontSize: "0.875rem",
marginBottom: 6,
overflow: "hidden",
textOverflow: "ellipsis",
whiteSpace: "nowrap",
}}
>
{task.title}
</div>
{/* Priority badge */}
<span
style={{
display: "inline-block",
padding: "1px 8px",
borderRadius: "var(--r-sm)",
background: priorityStyle.bg,
color: priorityStyle.color,
fontSize: "0.7rem",
fontWeight: 500,
marginBottom: 6,
}}
>
{priorityStyle.label}
</span>
{/* Description */}
{task.description && (
<p
style={{
color: "var(--muted)",
fontSize: "0.8rem",
margin: 0,
overflow: "hidden",
textOverflow: "ellipsis",
display: "-webkit-box",
WebkitLineClamp: 2,
WebkitBoxOrient: "vertical",
lineHeight: 1.4,
}}
>
{task.description}
</p>
)}
</div>
);
}
/* ---------------------------------------------------------------------------
Kanban Column
--------------------------------------------------------------------------- */
interface KanbanColumnProps {
config: ColumnConfig;
tasks: Task[];
}
function KanbanColumn({ config, tasks }: KanbanColumnProps): ReactElement {
return (
<div
style={{
minWidth: 280,
maxWidth: 340,
flex: "1 0 280px",
display: "flex",
flexDirection: "column",
background: "var(--bg-mid)",
borderRadius: "var(--r-lg)",
overflow: "hidden",
}}
>
{/* Column header */}
<div
style={{
borderTop: `3px solid ${config.accent}`,
padding: "12px 16px",
display: "flex",
alignItems: "center",
justifyContent: "space-between",
}}
>
<span
style={{
fontWeight: 600,
fontSize: "0.85rem",
color: "var(--text)",
}}
>
{config.label}
</span>
<span
style={{
display: "inline-flex",
alignItems: "center",
justifyContent: "center",
minWidth: 22,
height: 22,
padding: "0 6px",
borderRadius: "var(--r)",
background: `color-mix(in srgb, ${config.accent} 15%, transparent)`,
color: config.accent,
fontSize: "0.75rem",
fontWeight: 600,
fontFamily: "var(--mono)",
}}
>
{tasks.length}
</span>
</div>
{/* Droppable area */}
<Droppable droppableId={config.status}>
{(provided: DroppableProvided) => (
<div
ref={provided.innerRef}
{...provided.droppableProps}
style={{
padding: "8px 12px 12px",
flex: 1,
minHeight: 80,
overflowY: "auto",
}}
>
{tasks.map((task, index) => (
<Draggable key={task.id} draggableId={task.id} index={index}>
{(dragProvided: DraggableProvided, dragSnapshot: DraggableStateSnapshot) => (
<TaskCard
task={task}
provided={dragProvided}
snapshot={dragSnapshot}
columnAccent={config.accent}
/>
)}
</Draggable>
))}
{provided.placeholder}
</div>
)}
</Droppable>
</div>
);
}
/* ---------------------------------------------------------------------------
Kanban Board Page
--------------------------------------------------------------------------- */
export default function KanbanPage(): ReactElement {
const workspaceId = useWorkspaceId();
const [tasks, setTasks] = useState<Task[]>([]);
const [isLoading, setIsLoading] = useState(true);
const [error, setError] = useState<string | null>(null);
/* --- data fetching --- */
const loadTasks = useCallback(async (wsId: string | null): Promise<void> => {
try {
setIsLoading(true);
setError(null);
const filters = wsId !== null ? { workspaceId: wsId } : {};
const data = await fetchTasks(filters);
setTasks(data);
} catch (err: unknown) {
console.error("[Kanban] Failed to fetch tasks:", err);
setError(
err instanceof Error
? err.message
: "Something went wrong loading tasks. You could try again when ready."
);
} finally {
setIsLoading(false);
}
}, []);
useEffect(() => {
if (!workspaceId) {
setIsLoading(false);
return;
}
let cancelled = false;
async function load(): Promise<void> {
try {
setIsLoading(true);
setError(null);
const filters = workspaceId !== null ? { workspaceId } : {};
const data = await fetchTasks(filters);
if (!cancelled) {
setTasks(data);
}
} catch (err: unknown) {
console.error("[Kanban] Failed to fetch tasks:", err);
if (!cancelled) {
setError(
err instanceof Error
? err.message
: "Something went wrong loading tasks. You could try again when ready."
);
}
} finally {
if (!cancelled) {
setIsLoading(false);
}
}
}
void load();
return (): void => {
cancelled = true;
};
}, [workspaceId]);
/* --- group tasks by status --- */
function groupByStatus(allTasks: Task[]): Record<TaskStatus, Task[]> {
const grouped: Record<TaskStatus, Task[]> = {
[TaskStatus.NOT_STARTED]: [],
[TaskStatus.IN_PROGRESS]: [],
[TaskStatus.PAUSED]: [],
[TaskStatus.COMPLETED]: [],
[TaskStatus.ARCHIVED]: [],
};
for (const task of allTasks) {
grouped[task.status].push(task);
}
return grouped;
}
const grouped = groupByStatus(tasks);
/* --- drag-and-drop handler --- */
const handleDragEnd = useCallback(
(result: DropResult) => {
const { source, destination, draggableId } = result;
// Dropped outside a droppable area
if (!destination) return;
// Dropped in same position
if (source.droppableId === destination.droppableId && source.index === destination.index) {
return;
}
const newStatus = destination.droppableId as TaskStatus;
const taskId = draggableId;
// Optimistic update: move card in local state
setTasks((prev) => prev.map((t) => (t.id === taskId ? { ...t, status: newStatus } : t)));
// Persist to API
const wsId = workspaceId ?? undefined;
updateTask(taskId, { status: newStatus }, wsId).catch((err: unknown) => {
console.error("[Kanban] Failed to update task status:", err);
// Revert on failure by re-fetching
void loadTasks(workspaceId);
});
},
[workspaceId, loadTasks]
);
/* --- retry handler --- */
function handleRetry(): void {
void loadTasks(workspaceId);
}
/* --- render --- */
return (
<main style={{ padding: "32px 24px", minHeight: "100%" }}>
{/* Page header */}
<div style={{ marginBottom: 24 }}>
<h1
style={{
fontSize: "1.875rem",
fontWeight: 700,
color: "var(--text)",
margin: 0,
}}
>
Kanban Board
</h1>
<p
style={{
fontSize: "0.9rem",
color: "var(--muted)",
marginTop: 4,
}}
>
Visualize and manage task progress across stages
</p>
</div>
{/* Loading state */}
{isLoading ? (
<div className="flex justify-center py-16">
<MosaicSpinner label="Loading tasks..." />
</div>
) : error !== null ? (
/* Error state */
<div
style={{
background: "var(--surface)",
border: "1px solid var(--border)",
borderRadius: "var(--r-lg)",
padding: 32,
textAlign: "center",
}}
>
<p style={{ color: "var(--danger)", margin: "0 0 16px" }}>{error}</p>
<button
onClick={handleRetry}
style={{
padding: "8px 16px",
background: "var(--danger)",
border: "none",
borderRadius: "var(--r)",
color: "#fff",
fontSize: "0.85rem",
fontWeight: 500,
cursor: "pointer",
}}
>
Try again
</button>
</div>
) : tasks.length === 0 ? (
/* Empty state */
<div
style={{
background: "var(--surface)",
border: "1px solid var(--border)",
borderRadius: "var(--r-lg)",
padding: 48,
textAlign: "center",
}}
>
<p style={{ color: "var(--muted)", margin: 0, fontSize: "0.9rem" }}>
No tasks yet. Create some tasks to see them here.
</p>
</div>
) : (
/* Board */
<DragDropContext onDragEnd={handleDragEnd}>
<div
style={{
display: "flex",
gap: 16,
overflowX: "auto",
paddingBottom: 16,
minHeight: 400,
}}
>
{COLUMNS.map((col) => (
<KanbanColumn key={col.status} config={col} tasks={grouped[col.status]} />
))}
</div>
</DragDropContext>
)}
</main>
);
}

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@@ -5,7 +5,7 @@
import type { Task } from "@mosaic/shared";
import type { TaskStatus, TaskPriority } from "@mosaic/shared";
import { apiGet, type ApiResponse } from "./client";
import { apiGet, apiPatch, type ApiResponse } from "./client";
export interface TaskFilters {
status?: TaskStatus;
@@ -34,3 +34,15 @@ export async function fetchTasks(filters?: TaskFilters): Promise<Task[]> {
const response = await apiGet<ApiResponse<Task[]>>(endpoint, filters?.workspaceId);
return response.data;
}
/**
* Update a task by ID
*/
export async function updateTask(
id: string,
data: Partial<Task>,
workspaceId?: string
): Promise<Task> {
const res = await apiPatch<ApiResponse<Task>>(`/api/tasks/${id}`, data, workspaceId);
return res.data;
}