347 lines
12 KiB
TypeScript
347 lines
12 KiB
TypeScript
/**
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* 搜索栏组件 - 支持中文输入法 & 历史记录 & 自动补全
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*
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* 核心设计：
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* - 使用本地状态显示输入内容（包括 IME 组合中的拼音）
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* - 只在 IME 组合完成后或非 IME 输入时触发搜索
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* - 支持搜索历史记录（localStorage 存储，Enter 键保存）
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* - 支持搜索建议（自动补全）
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*/
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'use client'
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import { useRef, useState, useCallback, useEffect, memo } from 'react'
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interface SearchBarProps {
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value: string
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onChange: (value: string) => void
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placeholder?: string
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isSearching?: boolean
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}
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interface Suggestion {
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type: 'spu' | 'author' | 'scene'
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value: string
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}
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function SearchBarInner({
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value: externalValue,
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onChange,
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placeholder = '搜索素材 ID、SPU、任务号、店铺、场景或作者',
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isSearching = false,
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}: SearchBarProps) {
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// 本地状态用于显示（包括 IME 组合中的拼音）
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const [localValue, setLocalValue] = useState(externalValue)
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// IME 组合状态
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const isComposingRef = useRef(false)
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// 历史记录状态
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const [history, setHistory] = useState<string[]>([])
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// 建议状态
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const [suggestions, setSuggestions] = useState<Suggestion[]>([])
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const [showDropdown, setShowDropdown] = useState(false)
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const [selectedIndex, setSelectedIndex] = useState(-1)
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const inputRef = useRef<HTMLInputElement>(null)
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const containerRef = useRef<HTMLDivElement>(null)
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// 加载历史记录
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useEffect(() => {
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try {
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const saved = localStorage.getItem('searchHistory')
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if (saved) {
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setHistory(JSON.parse(saved))
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}
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} catch (e) {
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console.error('Failed to load search history', e)
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}
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}, [])
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// 获取建议
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useEffect(() => {
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const fetchSuggestions = async () => {
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if (!localValue || localValue.trim().length < 1 || isComposingRef.current) {
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setSuggestions([])
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return
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}
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try {
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const res = await fetch(`/api/search/suggestions?q=${encodeURIComponent(localValue.trim())}`)
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if (res.ok) {
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const data = await res.json()
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setSuggestions(data.suggestions || [])
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}
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} catch (e) {
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console.error('Failed to fetch suggestions', e)
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}
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}
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const timer = setTimeout(fetchSuggestions, 300)
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return () => clearTimeout(timer)
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}, [localValue])
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// 保存历史记录
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const saveHistory = useCallback((value: string) => {
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const trimmed = value.trim()
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if (!trimmed) return
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setHistory(prev => {
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const newHistory = [trimmed, ...prev.filter(h => h !== trimmed)].slice(0, 10)
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localStorage.setItem('searchHistory', JSON.stringify(newHistory))
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return newHistory
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})
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}, [])
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// 删除单条历史
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const deleteHistory = useCallback((e: React.MouseEvent, item: string) => {
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e.stopPropagation()
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setHistory(prev => {
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const newHistory = prev.filter(h => h !== item)
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localStorage.setItem('searchHistory', JSON.stringify(newHistory))
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return newHistory
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})
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}, [])
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// 清空历史
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const clearHistory = useCallback(() => {
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setHistory([])
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localStorage.removeItem('searchHistory')
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}, [])
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// 同步外部值到本地值
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useEffect(() => {
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if (!isComposingRef.current) {
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setLocalValue(externalValue)
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}
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}, [externalValue])
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// IME 组合开始
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const handleCompositionStart = useCallback(() => {
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isComposingRef.current = true
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}, [])
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// IME 组合结束
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const handleCompositionEnd = useCallback((e: React.CompositionEvent<HTMLInputElement>) => {
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isComposingRef.current = false
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const finalValue = e.currentTarget.value
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setLocalValue(finalValue)
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onChange(finalValue)
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}, [onChange])
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// 处理输入变化
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const handleChange = useCallback((e: React.ChangeEvent<HTMLInputElement>) => {
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const newValue = e.target.value
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setLocalValue(newValue)
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if (!isComposingRef.current) {
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onChange(newValue)
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}
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// 重置选择索引
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setSelectedIndex(-1)
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setShowDropdown(true)
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}, [onChange])
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// 处理按键
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const handleKeyDown = useCallback((e: React.KeyboardEvent<HTMLInputElement>) => {
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if (e.key === 'Enter') {
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if (selectedIndex >= 0 && suggestions.length > 0) {
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// 选择建议
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const item = suggestions[selectedIndex]
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setLocalValue(item.value)
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onChange(item.value)
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saveHistory(item.value)
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} else {
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// 普通搜索
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saveHistory(localValue)
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}
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setShowDropdown(false)
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inputRef.current?.blur()
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} else if (e.key === 'ArrowDown') {
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e.preventDefault()
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const maxIndex = (localValue ? suggestions.length : history.length) - 1
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setSelectedIndex(prev => (prev < maxIndex ? prev + 1 : 0))
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} else if (e.key === 'ArrowUp') {
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e.preventDefault()
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const maxIndex = (localValue ? suggestions.length : history.length) - 1
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setSelectedIndex(prev => (prev > 0 ? prev - 1 : maxIndex))
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} else if (e.key === 'Escape') {
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setShowDropdown(false)
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}
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}, [localValue, saveHistory, selectedIndex, suggestions, history.length, onChange])
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// 清空搜索
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const handleClear = useCallback(() => {
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setLocalValue('')
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onChange('')
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setSuggestions([])
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}, [onChange])
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// 点击建议或历史记录
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const handleItemClick = useCallback((value: string) => {
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setLocalValue(value)
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onChange(value)
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saveHistory(value)
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setShowDropdown(false)
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}, [onChange, saveHistory])
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// 处理点击外部关闭
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useEffect(() => {
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const handleClickOutside = (event: MouseEvent) => {
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if (containerRef.current && !containerRef.current.contains(event.target as Node)) {
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setShowDropdown(false)
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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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// 渲染建议类型标签
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const renderSuggestionType = (type: string) => {
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switch (type) {
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case 'spu': return <span className="text-xs bg-blue-100 text-blue-600 px-1.5 py-0.5 rounded">SPU</span>
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case 'author': return <span className="text-xs bg-green-100 text-green-600 px-1.5 py-0.5 rounded">作者</span>
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case 'scene': return <span className="text-xs bg-orange-100 text-orange-600 px-1.5 py-0.5 rounded">场景</span>
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default: return null
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}
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}
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// 决定显示什么内容
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const showSuggestionsList = localValue && suggestions.length > 0
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const showHistoryList = !localValue && history.length > 0
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const shouldShowDropdown = showDropdown && (showSuggestionsList || showHistoryList)
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return (
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<div ref={containerRef} className="relative mb-6 z-20">
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<input
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ref={inputRef}
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type="text"
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value={localValue}
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onChange={handleChange}
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onCompositionStart={handleCompositionStart}
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onCompositionEnd={handleCompositionEnd}
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onKeyDown={handleKeyDown}
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onFocus={() => setShowDropdown(true)}
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placeholder={placeholder}
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autoComplete="off"
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className="w-full pl-10 pr-10 py-3 rounded-xl border border-gray-200 dark:border-gray-700 bg-white dark:bg-gray-800 text-gray-900 dark:text-white focus:border-blue-500 dark:focus:border-blue-400 focus:ring-2 focus:ring-blue-200 dark:focus:ring-blue-600 outline-none transition-all shadow-sm"
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/>
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{/* 搜索图标 / 加载动画 */}
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{isSearching ? (
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<div className="absolute left-3 top-1/2 transform -translate-y-1/2 w-5 h-5">
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<div className="w-4 h-4 border-2 border-gray-300 border-t-blue-500 rounded-full animate-spin" />
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</div>
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) : (
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<svg
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className="absolute left-3 top-1/2 transform -translate-y-1/2 w-5 h-5 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="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z"
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/>
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</svg>
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)}
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{/* 清除按钮 */}
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{localValue && (
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<button
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onClick={handleClear}
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className="absolute right-3 top-1/2 transform -translate-y-1/2 text-gray-400 hover:text-gray-600 dark:hover:text-gray-300 transition-colors"
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aria-label="清除搜索"
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type="button"
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>
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<svg className="w-5 h-5" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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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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{/* 下拉列表 */}
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{shouldShowDropdown && (
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<div className="absolute top-full left-0 right-0 mt-2 bg-white dark:bg-gray-800 rounded-xl shadow-lg border border-gray-100 dark:border-gray-700 overflow-hidden animate-fade-in z-30">
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{/* 建议列表 */}
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{showSuggestionsList && (
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<ul>
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{suggestions.map((item, index) => (
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<li key={`${item.type}-${item.value}`}>
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<button
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onClick={() => handleItemClick(item.value)}
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className={`w-full text-left px-4 py-2.5 flex items-center justify-between group transition-colors text-sm text-gray-700 dark:text-gray-200 ${
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index === selectedIndex ? 'bg-gray-100 dark:bg-gray-700' : 'hover:bg-gray-50 dark:hover:bg-gray-700'
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}`}
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>
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<div className="flex items-center gap-2 overflow-hidden">
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<svg className="w-4 h-4 text-gray-400 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M21 21l-6-6m2-5a7 7 0 11-14 0 7 7 0 0114 0z" />
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</svg>
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<span className="truncate flex-1">
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{item.value}
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</span>
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{renderSuggestionType(item.type)}
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</div>
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</button>
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</li>
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))}
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</ul>
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)}
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{/* 历史记录列表 */}
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{showHistoryList && (
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<>
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<div className="flex items-center justify-between px-4 py-2 bg-gray-50 dark:bg-gray-700/50 text-xs text-gray-500 dark:text-gray-400">
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<span>最近搜索</span>
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<button
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onClick={clearHistory}
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className="hover:text-red-500 transition-colors"
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>
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清空历史
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</button>
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</div>
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<ul>
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{history.map((item, index) => (
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<li key={item}>
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<button
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onClick={() => handleItemClick(item)}
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className={`w-full text-left px-4 py-2.5 flex items-center justify-between group transition-colors text-sm text-gray-700 dark:text-gray-200 ${
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index === selectedIndex ? 'bg-gray-100 dark:bg-gray-700' : 'hover:bg-gray-50 dark:hover:bg-gray-700'
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}`}
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>
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<div className="flex items-center gap-2 overflow-hidden">
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<svg className="w-4 h-4 text-gray-400 flex-shrink-0" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M12 8v4l3 3m6-3a9 9 0 11-18 0 9 9 0 0118 0z" />
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</svg>
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<span className="truncate">{item}</span>
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</div>
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<div
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onClick={(e) => deleteHistory(e, item)}
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className="p-1 rounded-full hover:bg-gray-200 dark:hover:bg-gray-600 text-gray-400 opacity-0 group-hover:opacity-100 transition-all"
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>
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<svg className="w-3 h-3" fill="none" stroke="currentColor" viewBox="0 0 24 24">
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<path strokeLinecap="round" strokeLinejoin="round" strokeWidth={2} d="M6 18L18 6M6 6l12 12" />
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</svg>
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</div>
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</button>
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</li>
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))}
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</ul>
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</>
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)}
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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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const SearchBar = memo(SearchBarInner)
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export default SearchBar
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