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/**
* T077: Directory tree component with collapsible folders
*/
import { useState, useMemo } from 'react';
import { ChevronRight, ChevronDown, Folder, File } from 'lucide-react';
import { Button } from '@/components/ui/button';
import { ScrollArea } from '@/components/ui/scroll-area';
import type { NoteSummary } from '@/types/note';
import { cn } from '@/lib/utils';
interface TreeNode {
name: string;
path: string;
type: 'file' | 'folder';
children?: TreeNode[];
note?: NoteSummary;
}
interface DirectoryTreeProps {
notes: NoteSummary[];
selectedPath?: string;
onSelectNote: (path: string) => void;
}
/**
* Build a tree structure from flat list of note paths
*/
function buildTree(notes: NoteSummary[]): TreeNode[] {
const root: TreeNode = { name: '', path: '', type: 'folder', children: [] };
for (const note of notes) {
const parts = note.note_path.split('/');
let current = root;
// Navigate/create folders
for (let i = 0; i < parts.length - 1; i++) {
const folderName = parts[i];
const folderPath = parts.slice(0, i + 1).join('/');
let folder = current.children?.find(
(child) => child.name === folderName && child.type === 'folder'
);
if (!folder) {
folder = {
name: folderName,
path: folderPath,
type: 'folder',
children: [],
};
current.children = current.children || [];
current.children.push(folder);
}
current = folder;
}
// Add file
const fileName = parts[parts.length - 1];
current.children = current.children || [];
current.children.push({
name: fileName,
path: note.note_path,
type: 'file',
note,
});
}
// Sort children: folders first, then files, alphabetically
const sortChildren = (node: TreeNode) => {
if (node.children) {
node.children.sort((a, b) => {
if (a.type !== b.type) {
return a.type === 'folder' ? -1 : 1;
}
return a.name.localeCompare(b.name);
});
node.children.forEach(sortChildren);
}
};
sortChildren(root);
return root.children || [];
}
interface TreeNodeItemProps {
node: TreeNode;
depth: number;
selectedPath?: string;
onSelectNote: (path: string) => void;
}
function TreeNodeItem({ node, depth, selectedPath, onSelectNote }: TreeNodeItemProps) {
const [isOpen, setIsOpen] = useState(depth < 2); // Auto-expand first 2 levels
if (node.type === 'folder') {
return (
<div>
<Button
variant="ghost"
className={cn(
"w-full justify-start font-normal px-2 h-8",
"hover:bg-accent"
)}
style={{ paddingLeft: `${depth * 12 + 8}px` }}
onClick={() => setIsOpen(!isOpen)}
>
{isOpen ? (
<ChevronDown className="h-4 w-4 mr-1 shrink-0" />
) : (
<ChevronRight className="h-4 w-4 mr-1 shrink-0" />
)}
<Folder className="h-4 w-4 mr-2 shrink-0 text-muted-foreground" />
<span className="truncate">{node.name}</span>
</Button>
{isOpen && node.children && (
<div>
{node.children.map((child) => (
<TreeNodeItem
key={child.path}
node={child}
depth={depth + 1}
selectedPath={selectedPath}
onSelectNote={onSelectNote}
/>
))}
</div>
)}
</div>
);
}
// File node
const isSelected = node.path === selectedPath;
// Remove .md extension for display
const displayName = node.name.replace(/\.md$/, '');
return (
<Button
variant="ghost"
className={cn(
"w-full justify-start font-normal px-2 h-8",
"hover:bg-accent",
isSelected && "bg-accent"
)}
style={{ paddingLeft: `${depth * 12 + 8}px` }}
onClick={() => onSelectNote(node.path)}
>
<File className="h-4 w-4 mr-2 shrink-0 text-muted-foreground" />
<span className="truncate">{displayName}</span>
</Button>
);
}
export function DirectoryTree({ notes, selectedPath, onSelectNote }: DirectoryTreeProps) {
const tree = useMemo(() => buildTree(notes), [notes]);
if (notes.length === 0) {
return (
<div className="p-4 text-sm text-muted-foreground text-center">
No notes found. Create your first note to get started.
</div>
);
}
return (
<ScrollArea className="h-full">
<div className="py-2">
{tree.map((node) => (
<TreeNodeItem
key={node.path}
node={node}
depth={0}
selectedPath={selectedPath}
onSelectNote={onSelectNote}
/>
))}
</div>
</ScrollArea>
);
}
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