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"use client";
import { useCallback, useEffect, useMemo, useRef, useState } from "react";
import { createPortal } from "react-dom";
import {
Background,
BaseEdge,
MiniMap,
ReactFlow,
ReactFlowProvider,
ViewportPortal,
getBezierPath,
useReactFlow,
useViewport,
type EdgeProps,
type Node,
type NodeProps,
type NodeTypes,
} from "@xyflow/react";
import "@xyflow/react/dist/style.css";
import { Alert, Button, Slider, Space, Spin, Tooltip } from "antd";
import { AppstoreOutlined, BorderOuterOutlined, CloseOutlined, CopyOutlined } from "@ant-design/icons";
import { CanvasPreviewModeProvider } from "@/components/CanvasPreviewModeContext";
import {
NodeGenerationComposerPreview,
buildNodeGenerationPreviewPayload,
} from "@/components/composer/NodeGenerationComposerPreview";
import { workflowNodeTypes } from "@/components/workflowTypes";
import { useI18n } from "@/i18n";
import { DEFAULT_NODE_DIMENSIONS, defaultNodeDimensions } from "@/store/utils/nodeDefaults";
import { authFetch } from "@/utils/authFetch";
import { parseCanvasWorkflowProperties } from "@/utils/canvasWorkflowProperties";
import type { WorkflowFile } from "@/store/workflowStore";
import type { GroupColor, NodeGroup, NodeType, WorkflowNode } from "@/types";
export type CanvasTemplatePreviewData = {
id: number;
title: string;
subtitle: string;
image: string;
data: string;
};
type ParsedPreview =
| { workflow: WorkflowFile; error: null }
| { workflow: null; error: string };
type CanvasTemplateDetail = {
id: number;
coverUrl: string;
name: string;
desp: string;
properties: string;
};
type CanvasTemplateDetailResponse = {
data?: CanvasTemplateDetail;
message?: string;
status?: string;
};
const PREVIEW_FIT_VIEW_OPTIONS = { maxZoom: 1 };
const PREVIEW_GROUP_COLORS: Record<GroupColor, string> = {
neutral: "rgba(31, 35, 40, 0.06)",
blue: "rgba(59, 130, 246, 0.12)",
green: "rgba(34, 197, 94, 0.12)",
purple: "rgba(147, 51, 234, 0.12)",
orange: "rgba(249, 115, 22, 0.12)",
red: "rgba(239, 68, 68, 0.12)",
};
interface CanvasTemplatePreviewModalProps {
open: boolean;
template: CanvasTemplatePreviewData | null;
copying: boolean;
onClose: () => void;
onCopy: (template: CanvasTemplatePreviewData) => void;
}
function parsePreviewWorkflow(template: CanvasTemplatePreviewData | null): ParsedPreview {
if (!template) return { workflow: null, error: "" };
try {
const workflow = parseCanvasWorkflowProperties(template.data);
return { workflow, error: null };
} catch (error) {
return {
workflow: null,
error: error instanceof Error ? error.message : "Workflow data is invalid.",
};
}
}
function getGroupNodeId(groupId: string): string {
return `group-node-${groupId}`;
}
function createPreviewGroupNode(group: NodeGroup): WorkflowNode {
return {
id: getGroupNodeId(group.id),
type: "group",
position: group.position,
data: { groupId: group.id, group },
style: { width: group.size.width, height: group.size.height },
selectable: false,
draggable: false,
} as WorkflowNode;
}
function buildPreviewNodes(workflow: WorkflowFile): WorkflowNode[] {
const groups = workflow.groups;
const groupEntries = Object.values(groups ?? {});
if (groupEntries.length === 0) {
return workflow.nodes
.filter((node) => node.type !== "group")
.map((node) => ({
...node,
selected: false,
selectable: false,
draggable: false,
} as WorkflowNode));
}
const groupNodes = groupEntries.map(createPreviewGroupNode);
const regularNodes = workflow.nodes
.filter((node) => node.type !== "group")
.map((node) => {
const groupId = node.groupId;
if (!groupId || !groups?.[groupId]) {
return {
...node,
selected: false,
selectable: false,
draggable: false,
} as WorkflowNode;
}
const group = groups[groupId];
const groupNodeId = getGroupNodeId(groupId);
const isAlreadyNativeChild = node.parentId === groupNodeId;
return {
...node,
parentId: groupNodeId,
groupId,
selected: false,
position: isAlreadyNativeChild
? node.position
: {
x: node.position.x - group.position.x,
y: node.position.y - group.position.y,
},
selectable: false,
draggable: false,
} as WorkflowNode;
});
return [...groupNodes, ...regularNodes];
}
function PreviewGroupNode({ data }: NodeProps) {
const group = (data as { group?: NodeGroup }).group;
if (!group) return null;
return (
<div
className="relative h-full w-full rounded-xl border border-white/12"
style={{ backgroundColor: PREVIEW_GROUP_COLORS[group.color] ?? PREVIEW_GROUP_COLORS.neutral }}
>
<div className="absolute left-0 top-0 -translate-y-[calc(100%+4px)] whitespace-nowrap text-xs font-medium text-neutral-400">
{group.name}
</div>
</div>
);
}
function PreviewEdge({
id,
sourceX,
sourceY,
targetX,
targetY,
sourcePosition,
targetPosition,
markerEnd,
}: EdgeProps) {
const [edgePath] = getBezierPath({
sourceX,
sourceY,
sourcePosition,
targetX,
targetY,
targetPosition,
curvature: 0.35,
});
return (
<BaseEdge
id={id}
path={edgePath}
markerEnd={markerEnd}
style={{
stroke: "var(--edge-default)",
strokeWidth: 2,
strokeLinecap: "round",
strokeLinejoin: "round",
opacity: 0.78,
}}
/>
);
}
const previewEdgeTypes = {
editable: PreviewEdge,
reference: PreviewEdge,
};
const previewNodeTypes = Object.fromEntries(
Object.entries(workflowNodeTypes).map(([type, Component]) => [
type,
(props: NodeProps) => (
<div className="relative h-full w-full overflow-visible">
{type === "group" ? <PreviewGroupNode {...props} /> : <Component {...props} />}
</div>
),
])
) as NodeTypes;
function readPreviewNodeDimension(node: Node, axis: "width" | "height"): number {
const defaults = defaultNodeDimensions[node.type as NodeType] || DEFAULT_NODE_DIMENSIONS;
const styleValue = node.style?.[axis];
return typeof styleValue === "number" ? styleValue : defaults[axis];
}
function getPreviewNodeAbsolutePosition(node: Node, nodeById: Map<string, Node>): { x: number; y: number } {
if (!node.parentId) return node.position;
const parent = nodeById.get(node.parentId);
if (!parent) return node.position;
const parentPosition = getPreviewNodeAbsolutePosition(parent, nodeById);
return {
x: parentPosition.x + node.position.x,
y: parentPosition.y + node.position.y,
};
}
function CanvasTemplatePreviewNodePopover({
selectedNodeId,
nodes,
edges,
}: {
selectedNodeId: string | null;
nodes: WorkflowNode[];
edges: WorkflowFile["edges"];
}) {
const { zoom } = useViewport();
const selectedNode = useMemo(
() => nodes.find((node) => node.id === selectedNodeId && node.type !== "group"),
[nodes, selectedNodeId]
);
if (!selectedNode) return null;
const previewPayload = buildNodeGenerationPreviewPayload(selectedNode.id, nodes, edges);
if (!previewPayload.text && previewPayload.materials.length === 0) return null;
const nodeById = new Map<string, Node>(nodes.map((node) => [node.id, node]));
const position = getPreviewNodeAbsolutePosition(selectedNode, nodeById);
const width = readPreviewNodeDimension(selectedNode, "width");
const height = readPreviewNodeDimension(selectedNode, "height");
const safeZoom = zoom > 0 ? zoom : 1;
return (
<ViewportPortal>
<div
className="nodrag nopan nowheel pointer-events-auto absolute z-[10080]"
style={{
left: position.x + width / 2,
top: position.y + height,
transform: `translateX(-50%) translateY(${12 / safeZoom}px) scale(${1 / safeZoom})`,
transformOrigin: "top center",
}}
onPointerDown={(event) => event.stopPropagation()}
onClick={(event) => event.stopPropagation()}
>
<NodeGenerationComposerPreview
previewText={previewPayload.text}
previewMaterials={previewPayload.materials}
/>
</div>
</ViewportPortal>
);
}
function CanvasTemplatePreviewFlow({ workflow }: { workflow: WorkflowFile }) {
const { t } = useI18n();
const { getViewport, setViewport, fitView } = useReactFlow();
const wrapperRef = useRef<HTMLDivElement | null>(null);
const [isMiniMapOpen, setIsMiniMapOpen] = useState(false);
const [zoomPercent, setZoomPercent] = useState(100);
const [selectedNodeId, setSelectedNodeId] = useState<string | null>(null);
const previewNodes = useMemo(() => buildPreviewNodes(workflow), [workflow]);
const previewEdges = useMemo(
() => workflow.edges.map((edge) => ({ ...edge, type: edge.type || "editable" })),
[workflow.edges]
);
const syncZoomPercent = useCallback(() => {
setZoomPercent(Math.round(getViewport().zoom * 100));
}, [getViewport]);
const handleZoomPercentChange = useCallback((value: number) => {
const viewport = getViewport();
const nextZoom = value / 100;
const bounds = wrapperRef.current?.getBoundingClientRect();
const centerX = bounds ? bounds.left + bounds.width / 2 : window.innerWidth / 2;
const centerY = bounds ? bounds.top + bounds.height / 2 : window.innerHeight / 2;
const flowCenterX = (centerX - viewport.x) / viewport.zoom;
const flowCenterY = (centerY - viewport.y) / viewport.zoom;
setZoomPercent(value);
setViewport({
x: centerX - flowCenterX * nextZoom,
y: centerY - flowCenterY * nextZoom,
zoom: nextZoom,
});
}, [getViewport, setViewport]);
const handleFitViewFromToolbar = useCallback(() => {
void fitView({ ...PREVIEW_FIT_VIEW_OPTIONS, padding: 0.2, duration: 300 }).then(syncZoomPercent);
}, [fitView, syncZoomPercent]);
useEffect(() => {
syncZoomPercent();
}, [syncZoomPercent]);
return (
<div ref={wrapperRef} className="canvas-template-preview relative h-full w-full">
<ReactFlow
nodes={previewNodes}
edges={previewEdges}
nodeTypes={previewNodeTypes}
edgeTypes={previewEdgeTypes}
fitView
fitViewOptions={PREVIEW_FIT_VIEW_OPTIONS}
minZoom={0.1}
maxZoom={4}
nodesDraggable={false}
nodesConnectable={false}
elementsSelectable={false}
selectNodesOnDrag={false}
zoomOnDoubleClick={false}
panOnDrag
zoomOnScroll
zoomOnPinch
onNodeClick={(_, node) => {
if (node.type === "group") return;
setSelectedNodeId(node.id);
}}
onPaneClick={() => setSelectedNodeId(null)}
onMoveEnd={syncZoomPercent}
proOptions={{ hideAttribution: true }}
className="canvas-background"
>
<Background color="var(--border-subtle,#404040)" gap={20} size={1} />
<CanvasTemplatePreviewNodePopover
selectedNodeId={selectedNodeId}
nodes={previewNodes}
edges={previewEdges}
/>
{isMiniMapOpen && (
<MiniMap
position="bottom-left"
className="!rounded-none !border-0 !bg-[var(--surface-2)] !shadow-[var(--shadow-panel)] [&_.react-flow__minimap-mask]:stroke-transparent"
style={{ width: 190, height: 112, bottom: 58, left: 22 }}
maskColor="var(--surface-overlay)"
pannable
zoomable
nodeColor="var(--text-disabled)"
/>
)}
</ReactFlow>
<div className="absolute bottom-4 left-4 z-30 flex items-center gap-2">
<div className="flex h-12 items-center gap-1 rounded-2xl border border-[var(--border-subtle)] bg-[var(--surface-2)] px-2 shadow-[var(--shadow-panel)]">
<button
type="button"
aria-label={t("canvas.toolbar.toggleMinimap")}
title={t("canvas.toolbar.toggleMinimap")}
onClick={() => setIsMiniMapOpen((open) => !open)}
className={`flex h-8 w-8 items-center justify-center rounded-xl transition-colors ${
isMiniMapOpen
? "border border-[var(--border-strong)] bg-[var(--surface-active)] text-[var(--text-primary)] ring-1 ring-[var(--border-strong)]"
: "border border-transparent bg-[var(--surface-2)] text-[var(--text-secondary)] hover:bg-[var(--surface-hover)] hover:text-[var(--text-primary)]"
}`}
>
<AppstoreOutlined className="text-[15px]" />
</button>
<button
type="button"
aria-label={t("canvas.toolbar.fitView")}
title={t("canvas.toolbar.fitView")}
onClick={handleFitViewFromToolbar}
className="flex h-8 w-8 items-center justify-center rounded-xl bg-[var(--surface-2)] text-[var(--text-secondary)] transition-colors hover:bg-[var(--surface-hover)] hover:text-[var(--text-primary)]"
>
<BorderOuterOutlined className="text-[15px]" />
</button>
<div className="ml-1 flex w-24 items-center">
<Slider
min={10}
max={400}
step={3}
value={zoomPercent}
onChange={handleZoomPercentChange}
tooltip={{ formatter: (value) => `${value}%` }}
className="m-0 w-full"
/>
</div>
<span className="text-right text-xs tabular-nums text-[var(--text-secondary)]">
{zoomPercent}%
</span>
</div>
</div>
</div>
);
}
export function CanvasTemplatePreviewModal({
open,
template,
copying,
onClose,
onCopy,
}: CanvasTemplatePreviewModalProps) {
const { t } = useI18n();
const [resolvedTemplate, setResolvedTemplate] = useState<CanvasTemplatePreviewData | null>(null);
const [isLoadingDetail, setIsLoadingDetail] = useState(false);
const [detailError, setDetailError] = useState<string | null>(null);
const parsed = useMemo(() => parsePreviewWorkflow(resolvedTemplate), [resolvedTemplate]);
const canCopy = !!resolvedTemplate && !copying && !isLoadingDetail;
useEffect(() => {
if (!open || !template) {
setResolvedTemplate(null);
setDetailError(null);
setIsLoadingDetail(false);
return;
}
setResolvedTemplate(null);
setDetailError(null);
setIsLoadingDetail(true);
void authFetch(`/api/canvas-templates/detail?id=${template.id}`)
.then(async (response) => {
const result = (await response.json().catch(() => null)) as CanvasTemplateDetailResponse | null;
if (!response.ok || !result?.data) {
throw new Error(result?.message || t("templatePreview.invalidWorkflowDescription"));
}
const detail = result.data;
setResolvedTemplate({
id: detail.id,
title: detail.name,
subtitle: detail.desp,
image: detail.coverUrl,
data: detail.properties,
});
})
.catch((error) => {
setDetailError(error instanceof Error ? error.message : t("templatePreview.invalidWorkflowDescription"));
})
.finally(() => {
setIsLoadingDetail(false);
});
}, [open, template, t]);
useEffect(() => {
if (!open || typeof document === "undefined") return;
const hadSliderScope = document.body.classList.contains("canvas-slider-scope");
document.body.classList.add("canvas-slider-scope");
return () => {
if (!hadSliderScope) document.body.classList.remove("canvas-slider-scope");
};
}, [open]);
if (!open || typeof document === "undefined") return null;
const displayTitle = resolvedTemplate?.title || template?.title || t("home.tvShow");
return createPortal(
<div
role="dialog"
aria-modal="true"
aria-label={displayTitle}
className="fixed inset-0 z-[1000] flex items-center justify-center bg-[var(--surface-overlay)] p-10 backdrop-blur-sm"
onClick={onClose}
>
<section
className="relative h-[min(900px,90vh)] w-[90vw] overflow-hidden rounded-2xl border border-[var(--border-strong)] bg-[var(--surface-1)] text-[var(--text-primary)] shadow-[var(--shadow-panel)]"
onClick={(event) => event.stopPropagation()}
>
<header className="absolute left-[10%] right-[10%] top-4 z-20 flex h-12 items-center justify-between gap-4 rounded-xl border border-[var(--border-subtle)] bg-[var(--surface-2)] px-4 shadow-[var(--shadow-panel)]">
<div className="flex min-w-0 items-center gap-3">
<h2 className="truncate text-sm font-medium">
{displayTitle}
</h2>
</div>
<Space size={8}>
<span className="hidden text-sm text-[var(--text-secondary)] sm:inline">
{t("templatePreview.readOnly")}
</span>
<Tooltip title={t("templatePreview.copyProject")}>
<Button
type="primary"
icon={<CopyOutlined />}
loading={copying}
disabled={!canCopy}
onClick={() => {
if (resolvedTemplate) onCopy(resolvedTemplate);
}}
>
{t("templatePreview.copyProject")}
</Button>
</Tooltip>
</Space>
</header>
<button
type="button"
aria-label={t("common.close")}
onClick={onClose}
className="absolute right-4 top-4 z-30 flex h-10 w-10 items-center justify-center rounded-full text-[var(--text-secondary)] transition-colors hover:bg-[var(--surface-hover)] hover:text-[var(--text-primary)]"
>
<CloseOutlined />
</button>
<div className="canvas-background absolute inset-0">
{isLoadingDetail ? (
<div className="flex h-full items-center justify-center">
<Spin tip={t("home.loading")} />
</div>
) : detailError ? (
<div className="flex h-full items-center justify-center p-6">
<Alert
type="error"
showIcon
message={t("templatePreview.invalidWorkflow")}
description={detailError}
/>
</div>
) : parsed.workflow ? (
<ReactFlowProvider>
<CanvasPreviewModeProvider>
<CanvasTemplatePreviewFlow workflow={parsed.workflow} />
</CanvasPreviewModeProvider>
</ReactFlowProvider>
) : (
<div className="flex h-full items-center justify-center p-6">
<Alert
type="error"
showIcon
message={t("templatePreview.invalidWorkflow")}
description={parsed.error || t("templatePreview.invalidWorkflowDescription")}
/>
</div>
)}
</div>
</section>
<style>{`
.canvas-template-preview .react-flow__node-group {
pointer-events: none;
}
.canvas-template-preview .react-flow__node button,
.canvas-template-preview .react-flow__node input,
.canvas-template-preview .react-flow__node textarea,
.canvas-template-preview .react-flow__node [contenteditable="true"] {
pointer-events: none;
}
.canvas-template-preview .react-flow__resize-control {
display: none;
}
.canvas-template-preview .react-flow__handle {
opacity: 0;
pointer-events: none;
}
`}</style>
</div>,
document.body
);
}