324 lines
9.4 KiB
JavaScript
324 lines
9.4 KiB
JavaScript
// 百度百科词条查询应用
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class BaikeApp {
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constructor() {
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// API接口列表
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this.apiEndpoints = [
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'https://60s-cf.viki.moe',
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'https://60s.viki.moe',
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'https://60s.b23.run',
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'https://60s.114128.xyz',
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'https://60s-cf.114128.xyz'
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];
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this.currentApiIndex = 0;
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this.isLoading = false;
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this.initElements();
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this.bindEvents();
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}
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// 初始化DOM元素
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initElements() {
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this.searchInput = document.getElementById('searchInput');
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this.searchBtn = document.getElementById('searchBtn');
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this.resultSection = document.getElementById('resultSection');
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this.loading = document.getElementById('loading');
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this.resultCard = document.getElementById('resultCard');
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this.errorMessage = document.getElementById('errorMessage');
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this.welcomeMessage = document.getElementById('welcomeMessage');
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this.retryBtn = document.getElementById('retryBtn');
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// 结果显示元素
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this.resultTitle = document.getElementById('resultTitle');
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this.resultDescription = document.getElementById('resultDescription');
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this.resultImage = document.getElementById('resultImage');
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this.resultAbstract = document.getElementById('resultAbstract');
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this.resultLink = document.getElementById('resultLink');
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this.errorText = document.getElementById('errorText');
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}
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// 绑定事件
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bindEvents() {
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// 搜索按钮点击事件
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this.searchBtn.addEventListener('click', () => {
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this.handleSearch();
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});
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// 输入框回车事件
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this.searchInput.addEventListener('keypress', (e) => {
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if (e.key === 'Enter') {
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this.handleSearch();
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}
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});
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// 重试按钮事件
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this.retryBtn.addEventListener('click', () => {
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this.handleSearch();
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});
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// 输入框焦点事件
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this.searchInput.addEventListener('focus', () => {
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this.searchInput.select();
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});
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}
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// 处理搜索
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async handleSearch() {
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const query = this.searchInput.value.trim();
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if (!query) {
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this.showError('请输入要查询的词条');
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this.searchInput.focus();
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return;
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}
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if (this.isLoading) {
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return;
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}
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await this.searchBaike(query);
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}
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// 搜索百科词条
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async searchBaike(query) {
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this.showLoading();
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this.isLoading = true;
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// 重置API索引
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this.currentApiIndex = 0;
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const success = await this.tryApiCall(query);
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if (!success) {
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this.showError('所有API接口都无法访问，请稍后重试');
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}
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this.isLoading = false;
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}
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// 尝试API调用
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async tryApiCall(query) {
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for (let i = 0; i < this.apiEndpoints.length; i++) {
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const endpoint = this.apiEndpoints[this.currentApiIndex];
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try {
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const result = await this.callApi(endpoint, query);
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if (result) {
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this.showResult(result);
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return true;
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}
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} catch (error) {
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console.warn(`API ${endpoint} 调用失败:`, error.message);
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}
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// 切换到下一个API
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this.currentApiIndex = (this.currentApiIndex + 1) % this.apiEndpoints.length;
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}
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return false;
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}
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// 调用API
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async callApi(endpoint, query) {
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const url = `${endpoint}/v2/baike?word=${encodeURIComponent(query)}`;
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const controller = new AbortController();
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const timeoutId = setTimeout(() => controller.abort(), 10000); // 10秒超时
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try {
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const response = await fetch(url, {
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method: 'GET',
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signal: controller.signal,
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headers: {
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'Accept': 'application/json',
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}
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});
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clearTimeout(timeoutId);
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if (!response.ok) {
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throw new Error(`HTTP ${response.status}: ${response.statusText}`);
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}
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const data = await response.json();
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if (data.code === 200 && data.data) {
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return data.data;
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} else {
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throw new Error(data.message || '未找到相关词条');
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}
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} catch (error) {
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clearTimeout(timeoutId);
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if (error.name === 'AbortError') {
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throw new Error('请求超时');
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}
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throw error;
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}
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}
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// 显示加载状态
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showLoading() {
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this.hideAllSections();
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this.loading.style.display = 'flex';
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}
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// 显示搜索结果
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showResult(data) {
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this.hideAllSections();
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// 填充数据
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this.resultTitle.textContent = data.title || '未知标题';
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this.resultDescription.textContent = data.description || '暂无描述';
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this.resultAbstract.textContent = data.abstract || '暂无摘要信息';
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// 处理图片
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if (data.cover) {
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this.resultImage.src = data.cover;
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this.resultImage.style.display = 'block';
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this.resultImage.onerror = () => {
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this.resultImage.style.display = 'none';
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};
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} else {
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this.resultImage.style.display = 'none';
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}
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// 处理链接
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if (data.link) {
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this.resultLink.href = data.link;
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this.resultLink.style.display = 'inline-flex';
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} else {
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this.resultLink.style.display = 'none';
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}
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this.resultCard.style.display = 'block';
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// 滚动到结果区域
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this.resultCard.scrollIntoView({
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behavior: 'smooth',
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block: 'start'
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});
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}
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// 显示错误信息
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showError(message) {
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this.hideAllSections();
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this.errorText.textContent = message;
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this.errorMessage.style.display = 'flex';
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}
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// 隐藏所有区域
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hideAllSections() {
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this.loading.style.display = 'none';
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this.resultCard.style.display = 'none';
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this.errorMessage.style.display = 'none';
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this.welcomeMessage.style.display = 'none';
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}
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// 显示欢迎信息
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showWelcome() {
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this.hideAllSections();
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this.welcomeMessage.style.display = 'flex';
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}
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}
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// 工具函数
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class Utils {
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// 防抖函数
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static debounce(func, wait) {
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let timeout;
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return function executedFunction(...args) {
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const later = () => {
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clearTimeout(timeout);
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func(...args);
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};
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clearTimeout(timeout);
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timeout = setTimeout(later, wait);
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};
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}
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// 节流函数
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static throttle(func, limit) {
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let inThrottle;
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return function() {
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const args = arguments;
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const context = this;
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if (!inThrottle) {
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func.apply(context, args);
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inThrottle = true;
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setTimeout(() => inThrottle = false, limit);
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}
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};
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}
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// 格式化文本长度
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static truncateText(text, maxLength) {
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if (text.length <= maxLength) {
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return text;
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}
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return text.substring(0, maxLength) + '...';
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}
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// 检查是否为移动设备
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static isMobile() {
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return window.innerWidth <= 768;
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}
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}
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// 页面加载完成后初始化应用
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document.addEventListener('DOMContentLoaded', () => {
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// 初始化应用
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const app = new BaikeApp();
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// 添加页面可见性变化监听
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document.addEventListener('visibilitychange', () => {
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if (document.visibilityState === 'visible') {
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// 页面重新可见时，聚焦搜索框
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if (!app.isLoading) {
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app.searchInput.focus();
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}
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}
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});
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// 添加窗口大小变化监听
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window.addEventListener('resize', Utils.throttle(() => {
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// 响应式调整
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if (Utils.isMobile()) {
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// 移动端特殊处理
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document.body.classList.add('mobile');
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} else {
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document.body.classList.remove('mobile');
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}
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}, 250));
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// 初始检查设备类型
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if (Utils.isMobile()) {
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document.body.classList.add('mobile');
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}
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// 页面加载完成后聚焦搜索框
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setTimeout(() => {
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app.searchInput.focus();
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}, 500);
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// 添加键盘快捷键支持
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document.addEventListener('keydown', (e) => {
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// Ctrl/Cmd + K 聚焦搜索框
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if ((e.ctrlKey || e.metaKey) && e.key === 'k') {
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e.preventDefault();
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app.searchInput.focus();
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app.searchInput.select();
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}
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// ESC 清空搜索框
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if (e.key === 'Escape') {
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app.searchInput.value = '';
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app.showWelcome();
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app.searchInput.focus();
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}
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});
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console.log('百度百科词条查询应用已初始化');
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}); |