feat(08-02): create CategoryFilterDropdown component
- Searchable dropdown with Lucide icons per category option - "All categories" as first option with null value - Click-outside and Escape key dismissal - Clear button on trigger when category selected - Auto-focus search input when dropdown opens - State reset (search text) when dropdown closes
This commit is contained in:
198
src/client/components/CategoryFilterDropdown.tsx
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198
src/client/components/CategoryFilterDropdown.tsx
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import { useEffect, useRef, useState } from "react";
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import { LucideIcon } from "../lib/iconData";
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interface CategoryFilterDropdownProps {
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value: number | null;
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onChange: (value: number | null) => void;
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categories: Array<{ id: number; name: string; icon: string }>;
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}
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export function CategoryFilterDropdown({
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value,
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onChange,
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categories,
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}: CategoryFilterDropdownProps) {
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const [isOpen, setIsOpen] = useState(false);
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const [searchText, setSearchText] = useState("");
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const containerRef = useRef<HTMLDivElement>(null);
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const searchInputRef = useRef<HTMLInputElement>(null);
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const selectedCategory = categories.find((c) => c.id === value);
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const filteredCategories = categories.filter((c) =>
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c.name.toLowerCase().includes(searchText.toLowerCase()),
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);
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// Click-outside dismiss
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useEffect(() => {
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function handleClickOutside(e: MouseEvent) {
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if (
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containerRef.current &&
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!containerRef.current.contains(e.target as Node)
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) {
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setIsOpen(false);
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setSearchText("");
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}
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}
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document.addEventListener("mousedown", handleClickOutside);
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return () => document.removeEventListener("mousedown", handleClickOutside);
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}, []);
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// Escape key dismiss
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useEffect(() => {
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function handleKeyDown(e: KeyboardEvent) {
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if (e.key === "Escape" && isOpen) {
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setIsOpen(false);
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setSearchText("");
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}
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}
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document.addEventListener("keydown", handleKeyDown);
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return () => document.removeEventListener("keydown", handleKeyDown);
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}, [isOpen]);
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// Auto-focus search input when dropdown opens
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useEffect(() => {
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if (isOpen && searchInputRef.current) {
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searchInputRef.current.focus();
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}
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}, [isOpen]);
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function handleSelect(categoryId: number | null) {
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onChange(categoryId);
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setIsOpen(false);
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setSearchText("");
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}
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return (
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<div ref={containerRef} className="relative">
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{/* Trigger button */}
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<button
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type="button"
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onClick={() => setIsOpen((prev) => !prev)}
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className="flex items-center gap-2 px-3 py-2 border border-gray-200 rounded-lg text-sm bg-white hover:bg-gray-50 transition-colors whitespace-nowrap"
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>
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{selectedCategory ? (
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<>
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<LucideIcon
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name={selectedCategory.icon}
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size={14}
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className="text-gray-500 shrink-0"
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/>
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<span className="text-gray-900">{selectedCategory.name}</span>
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</>
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) : (
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<span className="text-gray-600">All categories</span>
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)}
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{selectedCategory ? (
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<button
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type="button"
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onClick={(e) => {
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e.stopPropagation();
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onChange(null);
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}}
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className="ml-1 text-gray-400 hover:text-gray-600"
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>
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<svg
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className="w-3.5 h-3.5"
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fill="none"
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stroke="currentColor"
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viewBox="0 0 24 24"
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>
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<path
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strokeLinecap="round"
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strokeLinejoin="round"
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strokeWidth={2}
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d="M6 18L18 6M6 6l12 12"
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/>
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</svg>
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</button>
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) : (
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<svg
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className="w-4 h-4 text-gray-400"
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fill="none"
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stroke="currentColor"
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viewBox="0 0 24 24"
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>
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<path
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strokeLinecap="round"
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strokeLinejoin="round"
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strokeWidth={2}
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d="M19 9l-7 7-7-7"
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/>
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</svg>
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)}
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</button>
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{/* Dropdown panel */}
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{isOpen && (
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<div className="absolute right-0 z-20 mt-1 min-w-[220px] bg-white border border-gray-200 rounded-lg shadow-lg">
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{/* Search input */}
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<div className="p-2 border-b border-gray-100">
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<input
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ref={searchInputRef}
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type="text"
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placeholder="Search categories..."
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value={searchText}
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onChange={(e) => setSearchText(e.target.value)}
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className="w-full px-2.5 py-1.5 border border-gray-200 rounded text-sm focus:outline-none focus:ring-2 focus:ring-gray-400 focus:border-transparent"
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/>
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</div>
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{/* Option list */}
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<ul className="max-h-60 overflow-y-auto py-1">
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{/* All categories option */}
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{(searchText === "" ||
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"all categories".includes(searchText.toLowerCase())) && (
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<li>
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<button
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type="button"
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onClick={() => handleSelect(null)}
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className={`w-full text-left px-3 py-2 text-sm cursor-pointer hover:bg-gray-50 ${
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value === null
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? "bg-gray-50 font-medium text-gray-900"
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: "text-gray-700"
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}`}
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>
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All categories
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</button>
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</li>
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)}
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{/* Category options */}
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{filteredCategories.map((cat) => (
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<li key={cat.id}>
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<button
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type="button"
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onClick={() => handleSelect(cat.id)}
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className={`w-full text-left px-3 py-2 text-sm cursor-pointer flex items-center gap-2 hover:bg-gray-50 ${
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cat.id === value
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? "bg-gray-50 font-medium text-gray-900"
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: "text-gray-700"
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}`}
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>
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<LucideIcon
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name={cat.icon}
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size={16}
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className="text-gray-500 shrink-0"
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/>
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{cat.name}
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</button>
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</li>
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))}
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{/* No results */}
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{filteredCategories.length === 0 &&
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!(
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searchText === "" ||
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"all categories".includes(searchText.toLowerCase())
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) && (
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<li className="px-3 py-2 text-sm text-gray-400">
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No categories found
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</li>
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)}
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</ul>
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</div>
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)}
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</div>
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);
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}
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