99 lines
4.1 KiB
JavaScript
99 lines
4.1 KiB
JavaScript
const dayjs = require('dayjs');
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const got = require('@/utils/got');
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const cheerio = require('cheerio');
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const config = require('@/config').value;
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dayjs.extend(require('dayjs/plugin/isSameOrBefore'));
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module.exports = async (ctx) => {
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const articleUrl = 'https://help.openai.com/en/articles/6825453-chatgpt-release-notes';
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const cache = await ctx.cache.tryGet(
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articleUrl,
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async () => {
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const returns = [];
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const pageResponse = await got({
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method: 'get',
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url: articleUrl,
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});
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const $ = cheerio.load(pageResponse.data);
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const page = JSON.parse($('script#__NEXT_DATA__').text()); // 页面貌似是用 Next 渲染的，有现成的 JSON 数据可以直接 parse，而避免用 cheerio 去解析主体内容的 HTML
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const feedTitle = page.props.pageProps.articleContent.title;
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const feedDesc = page.props.pageProps.articleContent.description;
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const $author = page.props.pageProps.articleContent.author;
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const authorName = $author.name;
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const $blocks = page.props.pageProps.articleContent.blocks;
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const anchorDay = dayjs();
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let heading = null,
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articleObj = {};
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let year = anchorDay.year();
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let prevMonth = -1;
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$blocks.forEach((block) => {
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const text = (block.text || '').trim();
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if (!text) {
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return;
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}
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if (block.type === 'subheading') {
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if (heading !== null) {
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articleObj.description = articleObj.description.trim().replace(/\n/g, '<br/>');
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returns.push(articleObj);
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articleObj = {};
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}
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heading = text;
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articleObj.title = heading;
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articleObj.author = authorName;
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articleObj.category = 'ChatGPT';
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articleObj.link = articleUrl + '#' + block.idAttribute;
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articleObj.guid = articleUrl + '#' + block.idAttribute;
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articleObj.description = '';
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// 目前 ChatGPT Release Notes 页面并没有写入年份，所以只能靠猜
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// 当前的正则表达式只支持 (月份英文+空格+日期数字) 的格式
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const matchesPubDate = heading.match(/\((\w+\s+\d{1,2})\)$/);
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// 实现：当年度交替时，年份减去 1
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if (matchesPubDate !== null) {
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const curMonth = 1 + 'Jan,Feb,Mar,Apr,May,Jun,Jul,Aug,Sep,Oct,Nov,Dec'.split(',').indexOf(matchesPubDate[1].substring(0, 3));
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if (prevMonth !== -1 && prevMonth < curMonth) {
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year--; // 年度交替：上一个月份数小于当前月份数；但排除 prevMonth==-1 的初始化情况
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}
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prevMonth = curMonth;
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const pubDay = dayjs(`${matchesPubDate[1]}, ${year}`, ['MMMM D, YYYY', 'MMM D, YYYY'], 'en', true);
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// 从 ISO（GMT）时间的字符串（使用字符串替换的方式）替换成 US/Pacific PST 时区的表达
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articleObj.pubDate = dayjs(pubDay.toISOString().replace(/\.\d{3}Z$/, '-08:00'));
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const linkAnchor = pubDay.format('YYYY_MM_DD');
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articleObj.guid = articleUrl + '#' + linkAnchor;
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}
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} else {
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articleObj.description += block.text.trim() + '\n\n';
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}
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});
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if (heading !== null) {
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articleObj.description = articleObj.description.trim().replace(/\n/g, '<br/>');
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returns.push(articleObj);
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}
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return { feedTitle, feedDesc, items: returns };
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},
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config.cache.routeExpire,
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false
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);
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ctx.state.data = {
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title: cache.feedTitle,
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description: cache.feedDesc,
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link: articleUrl,
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item: cache.items,
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};
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};
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