feat(event): cria parser de sitemap pra páginas públicas de eventos

Author: guiseek

packages/event/data-source/src/index.ts

@@ -1,4 +1,5 @@
 export * from './lib/event-providers';
 export * from './lib/application';
 export * from './lib/schemas';
+export * from './lib/utils';
 export * from './lib/dtos';

packages/event/data-source/src/lib/utils/create-sitemap-from-events.ts

@@ -0,0 +1,24 @@
+import { EventDto } from '../dtos';
+
+const createSitemapUrl = (loc: string, lastmod: string | null) => `<url>
+<loc>${loc}</loc>
+${lastmod ? `<lastmod>${lastmod}</lastmod>` : ''}
+</url>`;
+
+export function createSitemapFromEvents(events: EventDto[]) {
+  const header = `<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">`;
+
+  const urls = events
+    .map((event) => {
+      const loc = `https://devparana.mx/#/evento/${event.id}`;
+      const lastmod = event.date ? new Date(event.date).toISOString() : null;
+
+      return createSitemapUrl(loc, lastmod);
+    })
+    .join('');
+
+  const footer = `</urlset>`;
+
+  return `${header}${urls}${footer}`;
+}

packages/event/data-source/src/lib/utils/index.ts

@@ -0,0 +1 @@
+export * from './create-sitemap-from-events';

packages/event/resource/src/lib/controllers/events.ts

@@ -18,6 +18,8 @@ import {
   Query,
   Delete,
   Controller,
+  Res,
+  BadRequestException,
 } from '@nestjs/common';
 import {
   EventDto,
@@ -27,9 +29,12 @@ import {
   UpdateEventDto,
   RSVPsFacade,
   CreateRSVPDto,
+  createSitemapFromEvents,
 } from '@devmx/event-data-source';
 import 'multer';
 import { subDays } from 'date-fns/subDays';
+import { Response } from 'express';
+
 
 @ApiTags('Eventos')
 @Controller('events')
@@ -49,6 +54,28 @@ export class EventsController {
     }
   }
 
+  @Get('sitemap.xml')
+  @Allowed()
+  @ApiPage(EventDto)
+  async sitemap(@Res() res: Response) {
+    let date = new Date();
+    date = subDays(date, 1);
+
+    try {
+      const events = await this.eventsFacade.findFrom(date, {
+        page: 0,
+        size: 100,
+      });
+
+      const sitemap = createSitemapFromEvents(events.data);
+
+      res.setHeader('Content-Type', 'application/xml');
+      res.send(sitemap);
+    } catch (err) {
+      throw new BadRequestException();
+    }
+  }
+
   @Get()
   @Allowed()
   @ApiPage(EventDto)