feat(route): add Shanghai weather alert

lib/routes/soweather/namespace.ts

@@ -0,0 +1,11 @@
+import type { Namespace } from '@/types';
+
+export const namespace: Namespace = {
+    name: 'SoWeather',
+    url: 'wx.soweather.com',
+    categories: ['forecast'],
+    lang: 'zh-CN',
+    zh: {
+        name: '上海天气预警',
+    },
+};

lib/routes/soweather/warn.ts

@@ -0,0 +1,135 @@
+import sanitizeHtml from 'sanitize-html';
+
+import type { DataItem, Route } from '@/types';
+import cache from '@/utils/cache';
+import ofetch from '@/utils/ofetch';
+import { parseDate } from '@/utils/parse-date';
+import timezone from '@/utils/timezone';
+
+import type { Data } from '../../types';
+
+const rootUrl = 'https://wx.soweather.com';
+const pageUrl = `${rootUrl}/wxapp/warn.jsp`;
+const dataUrl = `${rootUrl}/wxapp/jsondata/warn.js`;
+const cacheMaxAge = 5 * 60;
+const specialIssuers = new Set(['上海市民防办', '中国铁路上海局集团有限公司上海站', '上海申通地铁集团有限公司', '市交通委指挥中心']);
+const warningGroups = [
+    ['市级预警', 'warns'],
+    ['市级历史预警', 'historywarns'],
+    ['分区预警', 'fqwarns'],
+    ['分区历史预警', 'fqhistorywarns'],
+] as const;
+
+interface RawWarning {
+    isActive: boolean;
+    yjid: string;
+    htmlword: string;
+    yjfbdw: string;
+    yjfbtype: string;
+    name: string;
+    id: number;
+    district: string;
+    fbsj: string;
+    jcsj?: string | null;
+    lqImage1?: string | null;
+    icon?: string | null;
+    gtyjstatus?: string | null;
+}
+
+async function handler(): Promise<Data | null> {
+    const response = await cache.tryGet(`soweather:warn:${dataUrl}`, () => ofetch<string>(dataUrl, { parseResponse: (txt) => txt }), cacheMaxAge);
+    const warnings = warningGroups.flatMap(([groupName, variableName]) =>
+        parseWarnings(response, variableName)
+            .filter((warning) => isRealWarning(warning))
+            .map((warning) => buildItem(warning, groupName))
+    );
+
+    return {
+        title: '上海天气预警',
+        description: '上海天气预警',
+        link: pageUrl,
+        item: warnings,
+        language: 'zh-CN',
+    };
+}
+
+export const route: Route = {
+    path: '/warn',
+    name: 'Shanghai Weather Alert',
+    url: 'wx.soweather.com/wxapp/warn.jsp',
+    maintainers: ['TinkoLiu'],
+    example: '/soweather/warn',
+    categories: ['forecast'],
+    handler,
+    zh: {
+        name: '上海天气预警',
+        example: '/soweather/warn',
+        path: '/warn',
+        maintainers: ['TinkoLiu'],
+        handler,
+    },
+};
+
+function parseWarnings(script: string, variableName: string): RawWarning[] {
+    const pattern = new RegExp(`var\\s+${variableName}\\s*=\\s*(\\[[\\s\\S]*?\\])\\s*(?=var\\s+\\w+\\s*=|$)`);
+    const json = pattern.exec(script)?.[1];
+
+    return json ? (JSON.parse(json) as RawWarning[]) : [];
+}
+
+function isRealWarning(warning: RawWarning): boolean {
+    return !['Exercise', 'Test'].includes(warning.gtyjstatus ?? '');
+}
+
+function buildItem(warning: RawWarning, groupName: string): DataItem {
+    const title = buildTitle(warning);
+    const content = buildContent(warning);
+    const guid = `${warning.district}-${warning.id}-${warning.yjid}`;
+    const image = warning.icon ? `${rootUrl}/wxapp/images/icon/${warning.icon.replaceAll('-', '_')}` : undefined;
+    const updated = !warning.isActive && warning.jcsj ? timezone(parseDate(warning.jcsj, 'YYYY-MM-DD HH:mm'), 8) : undefined;
+
+    return {
+        title,
+        link: `${pageUrl}#${encodeURIComponent(guid)}`,
+        guid,
+        description: content,
+        content: {
+            html: content,
+            text: content
+                .replaceAll(/<br\s*\/?>/gi, '\n')
+                .replaceAll(/<[^>]+>/g, '')
+                .trim(),
+        },
+        pubDate: timezone(parseDate(warning.fbsj, 'YYYY-MM-DD HH:mm'), 8),
+        updated,
+        author: warning.yjfbdw,
+        category: [groupName, warning.district, warning.name, warning.isActive ? '生效中' : '已解除'],
+        image,
+    };
+}
+
+function buildTitle(warning: RawWarning): string {
+    const suffix = specialIssuers.has(warning.yjfbdw) ? '' : '预警';
+
+    return `${warning.isActive ? '' : '【已解除】'}${warning.yjfbdw}${warning.yjfbtype}${warning.name}${suffix}`;
+}
+
+function buildContent(warning: RawWarning): string {
+    const sections = [
+        !warning.isActive && warning.jcsj ? `解除时间：${warning.jcsj}<br>` : '',
+        sanitizeHtml(getWarningInfo(warning.htmlword), {
+            allowedTags: [...sanitizeHtml.defaults.allowedTags, 'br'],
+            allowedAttributes: {},
+        }),
+        warning.lqImage1 ? `<p><img src="${new URL(warning.lqImage1.replaceAll('\\', '/'), `${rootUrl}/wxapp/`).href}"></p>` : '',
+    ];
+
+    return sections.join('');
+}
+
+function getWarningInfo(htmlword: string): string {
+    return htmlword
+        .split('防御指引')[0]
+        .replaceAll(/(?:(?:\s|&nbsp;)*<br\s*\/?>)+\s*$/gi, '')
+        .trim();
+}