support multilingual search
This commit is contained in:
geekifan
@ -5,4 +5,242 @@
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</div>
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<div id="search-results" class="d-flex flex-wrap justify-content-center text-muted mt-3"></div>
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</div>
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</div>
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</div>
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<script>
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const DEFAULT_CONFIG = {
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search: {
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minChars: 1, // 最小字符数
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maxResults: 5, // 最大结果数
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fields: { // 搜索字段
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title: true,
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description: true,
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section: true,
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contents: true
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},
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// 简化搜索配置
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strictMode: true // 严格模式：只返回精确匹配结果
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}
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};
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class FastSearch {
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constructor({
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searchInput, resultsContainer, json,
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searchResultTemplate = null,
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noResultsText = null,
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}) {
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this.searchInput = searchInput;
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this.resultsContainer = resultsContainer;
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this.json = json;
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this.searchResultTemplate = searchResultTemplate;
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this.noResultsText = noResultsText;
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this.init();
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}
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init() {
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this.loadSearchIndex();
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this.searchInput.addEventListener('input', (event) => {
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if (!this.searchIndex) {
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this.resultsContainer.innerHTML = '<li class="search-message">Loading search index...</li>';
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return;
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}
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this.performSearch(this.searchInput.value);
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});
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}
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// Load the search index
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async loadSearchIndex() {
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try {
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const response = await fetch(this.json);
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if (!response.ok) throw new Error('Failed to load search index');
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const data = await response.json();
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this.searchIndex = data.map(item => ({
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...item,
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// 转换为小写以进行不区分大小写的搜索
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searchableTitle: item.title?.toLowerCase() || '',
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searchableDesc: item.desc?.toLowerCase() || '',
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searchableSection: item.section?.toLowerCase() || '',
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searchableContents: item.contents?.toLowerCase() || ''
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}));
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} catch (error) {
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console.error('Error loading search index:', error);
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this.resultsContainer.innerHTML = '<li class="search-message">Error loading search index...</li>';
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}
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}
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escapeHtml(unsafe) {
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if (!unsafe) return '';
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return unsafe
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.replace(/&/g, "&")
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.replace(/</g, "<")
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.replace(/>/g, ">")
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.replace(/"/g, """)
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.replace(/'/g, "'");
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}
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// 检测文本是否包含查询术语 - 使用严格的精确匹配
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containsTerm(text, term) {
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if (!text || !term) return false;
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return text.includes(term);
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}
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performSearch(query) {
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// 清理和标准化查询
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query = query.toLowerCase().trim();
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// 检查查询是否有效
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if (!query || !this.searchIndex || query.length < DEFAULT_CONFIG.search.minChars) {
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this.resultsContainer.innerHTML = '';
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return;
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}
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// 使用空格分隔查询词（对多语言适用）
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const searchTerms = [
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query, // 保留整个查询字符串作为必须匹配的项
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...query.split(/\s+/).filter(term => term.length > 0) // 添加单独的词
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];
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// 去重
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const uniqueTerms = [...new Set(searchTerms)];
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// 要求完整查询必须匹配的标志
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const requireFullQueryMatch = DEFAULT_CONFIG.search.strictMode;
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// 搜索
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const results = this.searchIndex
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.map(item => {
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// 首先检查完整查询是否匹配（严格模式下必须匹配）
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const fullQueryMatched = this.checkFieldsForMatch(item, uniqueTerms[0]);
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// 如果启用了严格模式且完整查询未匹配，则跳过此项
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if (requireFullQueryMatch && !fullQueryMatched) {
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return { item, score: 0, matched: false };
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}
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// 计算匹配得分
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let score = 0;
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let matchedTermsCount = 0;
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let matchedInTitle = false;
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// 检查每个词的匹配情况
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uniqueTerms.forEach((term, index) => {
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// 对于整个查询字符串(index=0)，给予更高权重
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const isFullQuery = index === 0;
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const matched = this.checkFieldsForMatch(item, term);
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if (matched) {
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matchedTermsCount++;
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// 基于匹配位置计算得分
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if (matched.inTitle) {
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score += isFullQuery ? 10 : 5;
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matchedInTitle = true;
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}
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if (matched.inDesc) {
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score += isFullQuery ? 8 : 4;
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}
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if (matched.inSection) {
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score += isFullQuery ? 6 : 3;
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}
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if (matched.inContents) {
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score += isFullQuery ? 4 : 2;
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}
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}
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});
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// 计算匹配率
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const matchRatio = matchedTermsCount / uniqueTerms.length;
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// 最终得分计算
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const finalScore = score * matchRatio * (matchedInTitle ? 1.5 : 1);
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return {
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item,
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score: finalScore,
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matched: fullQueryMatched // 只有完整查询匹配才视为有效
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};
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})
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.filter(result => result.matched)
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.sort((a, b) => b.score - a.score)
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.slice(0, DEFAULT_CONFIG.search.maxResults)
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.map(result => result.item);
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// 显示结果
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if (results.length === 0) {
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this.resultsContainer.innerHTML = '<p class="mt-5">{{ i18n "search.no_results" }}</p>';
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return;
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}
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const searchItems = results.map((item) => {
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let categories = '';
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let tags = '';
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if (item.categories) {
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categories = item.categories.join(', ');
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categories = `<div class="me-sm-4"><i class="far fa-folder fa-fw"></i>${categories}</div>`;
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}
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if (item.tags) {
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tags = item.tags.join(', ');
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tags = `<div><i class="fa fa-tag fa-fw"></i>${tags}</div>`
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}
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return `
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<article class="px-1 px-sm-2 px-lg-4 px-xl-0">
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<header>
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<h2><a href="${this.escapeHtml(item.permalink)}">${this.escapeHtml(item.title)}</a></h2>
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<div class="post-meta d-flex flex-column flex-sm-row text-muted mt-1 mb-1">
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${categories}
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${tags}
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</div>
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</header>
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<p>${this.escapeHtml(item.contents)}</p>
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</article>
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`;
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}).join('');
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this.resultsContainer.innerHTML = searchItems;
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}
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// 检查一个词是否匹配指定项的任何字段
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checkFieldsForMatch(item, term) {
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const matches = {
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inTitle: false,
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inDesc: false,
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inSection: false,
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inContents: false
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};
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// 检查各个字段
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if (DEFAULT_CONFIG.search.fields.title && this.containsTerm(item.searchableTitle, term)) {
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matches.inTitle = true;
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}
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if (DEFAULT_CONFIG.search.fields.description && this.containsTerm(item.searchableDesc, term)) {
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matches.inDesc = true;
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}
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if (DEFAULT_CONFIG.search.fields.section && this.containsTerm(item.searchableSection, term)) {
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matches.inSection = true;
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}
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if (DEFAULT_CONFIG.search.fields.contents && this.containsTerm(item.searchableContents, term)) {
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matches.inContents = true;
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}
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// 如果任何字段匹配，则返回匹配信息
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if (matches.inTitle || matches.inDesc || matches.inSection || matches.inContents) {
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return matches;
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}
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// 否则返回false
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return false;
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}
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}
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const search = new FastSearch({
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searchInput: document.getElementById('search-input'),
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resultsContainer: document.getElementById('search-results'),
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json: `{{ path.Join .Site.Home.RelPermalink "index.json" }}`
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});
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</script>
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