7 changed files with 540 additions and 55 deletions
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51api/user.js
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62components/book-list-item/book-list-item.vue
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33subpkg/pages/collect-list/collect-list.vue
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49subpkg/pages/feedback-detail/feedback-detail.vue
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160subpkg/pages/feedback-list/feedback-list.vue
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46subpkg/pages/feedback/feedback.vue
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184utils/bookCover.js
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/** |
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* 获取已加载的 bookrecno 缓存 |
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* @returns {Set} - 已加载的 bookrecno 集合 |
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*/ |
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function getLoadedBookrecnos() { |
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const loadedList = wx.getStorageSync('loadedBookrecnos') || []; |
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return new Set(loadedList); |
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} |
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|
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/** |
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* 标记 bookrecno 已加载 |
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* @param {Array} bookrecnoList - 已加载的 bookrecno 列表 |
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*/ |
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function markBookrecnoLoaded(bookrecnoList) { |
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const loadedSet = getLoadedBookrecnos(); |
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bookrecnoList.forEach(bookrecno => loadedSet.add(bookrecno)); |
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wx.setStorageSync('loadedBookrecnos', Array.from(loadedSet)); |
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} |
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|
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/** |
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* 通过远程接口获取封面（基于 ISBN） |
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* @param {Array} isbnList - ISBN 列表 |
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* @returns {Promise<Object>} - 封面数据映射 { isbn: coverUrl } |
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*/ |
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export async function fetchCoversByISBN(isbnList) { |
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if (!isbnList || isbnList.length === 0) { |
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return {}; |
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} |
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|
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// 移除 ISBN 中的连字符
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const cleanIsbns = isbnList.map(isbn => isbn.replace(/-/g, '')); |
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const isbns = cleanIsbns.join(','); |
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const url = `https://book-resource.dataesb.com/websearch/metares?glc=EGD0755036&cmdACT=getImages&type=0&isbns=${isbns}`; |
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|
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return new Promise((resolve) => { |
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wx.request({ |
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url: url, |
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method: 'GET', |
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success: (res) => { |
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const result = {}; |
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let list = []; |
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|
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try { |
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// 获取响应数据
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let responseData = res.data; |
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|
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// 如果是字符串，尝试解析为 JSON
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if (typeof responseData === 'string') { |
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// 移除可能的 JSONP 包装括号 ({"result":...})
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const trimmed = responseData.trim(); |
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if (trimmed.startsWith('(') && trimmed.endsWith(')')) { |
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responseData = trimmed.slice(1, -1); |
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} |
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responseData = JSON.parse(responseData); |
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} |
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|
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// 获取 result 数组
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if (responseData && responseData.result && Array.isArray(responseData.result)) { |
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list = responseData.result; |
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} |
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} catch (error) { |
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console.error('解析封面数据失败:', error); |
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list = []; |
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} |
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|
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list.forEach(item => { |
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if (item.isbn && item.coverlink && item.coverlink.indexOf('http') !== -1) { |
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// 存储时移除连字符，便于匹配
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result[item.isbn.replace(/-/g, '')] = item.coverlink; |
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} |
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}); |
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resolve(result); |
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}, |
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fail: () => { |
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resolve({}); |
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} |
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}); |
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}); |
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} |
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|
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/** |
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* 获取服务器存在的 bookrecno 列表 |
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* @param {Array} bookrecnoList - bookrecno 列表 |
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* @returns {Promise<Object>} - 存在的 bookrecno 映射 { bookrecno: coverUrl } |
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*/ |
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export async function fetchCoversByBookrecno(bookrecnoList) { |
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if (!bookrecnoList || bookrecnoList.length === 0) { |
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return {}; |
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} |
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const bookrecnos = bookrecnoList.join(','); |
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return new Promise((resolve) => { |
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wx.request({ |
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url: `http://218.200.95.251:8081/opac/getExistsBookrecnoList/${bookrecnos}`, |
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method: 'POST', |
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success: (res) => { |
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const result = {}; |
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console.log('bookrecnoList',res) |
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const existsList = res.data || []; |
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console.log('existsList',existsList) |
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existsList.forEach(bookrecno => { |
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const timestamp = new Date().getTime(); |
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result[bookrecno] = `http://218.200.95.251:8081/opac/bscover/${bookrecno}?timestamp=${timestamp}`; |
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}); |
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// 标记已加载
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markBookrecnoLoaded(existsList); |
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resolve(result); |
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}, |
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fail: () => { |
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resolve({}); |
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} |
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}); |
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}); |
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} |
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/** |
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* 加载图书封面（核心方法） |
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* @param {Array} bookList - 图书数据列表 |
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* @param {Function} callback - 回调函数，接收 (index, coverUrl) 参数 |
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* @returns {Promise<void>} |
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*/ |
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export async function loadBookCovers(bookList, callback) { |
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if (!bookList || bookList.length === 0 || typeof callback !== 'function') { |
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return; |
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} |
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try { |
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// 分离需要查询的 ISBN 和 bookrecno
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const loadedSet = getLoadedBookrecnos(); |
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const isbnMap = new Map(); // index -> isbn
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const bookrecnoMap = new Map(); // index -> bookrecno（未加载过的）
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bookList.forEach((book, index) => { |
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if (book.isbn) { |
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isbnMap.set(index, book.isbn.replace(/-/g, '')); |
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} |
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if (book.bookrecno && !loadedSet.has(book.bookrecno)) { |
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bookrecnoMap.set(index, book.bookrecno); |
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} |
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}); |
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// 并行请求 ISBN 和 bookrecno 的封面
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const [isbnCovers, bookrecnoCovers] = await Promise.all([ |
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fetchCoversByISBN(Array.from(isbnMap.values())), |
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fetchCoversByBookrecno(Array.from(bookrecnoMap.values())) |
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]); |
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// 更新封面
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bookList.forEach((book, index) => { |
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let coverUrl = null; |
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// 优先使用 ISBN 获取的封面
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const isbn = book.isbn ? book.isbn.replace(/-/g, '') : null; |
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if (isbn && isbnCovers[isbn]) { |
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coverUrl = isbnCovers[isbn]; |
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} |
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// 如果 ISBN 没获取到，尝试 bookrecno
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else if (book.bookrecno && bookrecnoCovers[book.bookrecno]) { |
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coverUrl = bookrecnoCovers[book.bookrecno]; |
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} |
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if (coverUrl) { |
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callback(index, coverUrl); |
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} |
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}); |
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} catch (error) { |
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console.error('加载图书封面失败:', error); |
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} |
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} |
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/** |
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* 清除封面加载缓存 |
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*/ |
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export function clearCoverCache() { |
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wx.removeStorageSync('loadedBookrecnos'); |
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} |
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export default { |
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loadBookCovers, |
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clearCoverCache, |
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fetchCoversByISBN, |
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fetchCoversByBookrecno |
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}; |
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