implemented lastmodDateOnly for SitemapIndexStream, fixes #356

README.md

@@ -144,6 +144,7 @@ const {
 
 const sms = new SitemapAndIndexStream({
   limit: 50000, // defaults to 45k
+  lastmodDateOnly: false, // print date not time
   // SitemapAndIndexStream will call this user provided function every time
   // it needs to create a new sitemap file. You merely need to return a stream
   // for it to write the sitemap urls to and the expected url where that sitemap will be hosted

lib/sitemap-index-stream.ts

@@ -17,18 +17,21 @@ const sitemapIndexTagStart =
 const closetag = '</sitemapindex>';
 
 export interface SitemapIndexStreamOptions extends TransformOptions {
+  lastmodDateOnly?: boolean;
   level?: ErrorLevel;
   xslUrl?: string;
 }
 const defaultStreamOpts: SitemapIndexStreamOptions = {};
 export class SitemapIndexStream extends Transform {
+  lastmodDateOnly: boolean;
   level: ErrorLevel;
   xslUrl?: string;
   private hasHeadOutput: boolean;
   constructor(opts = defaultStreamOpts) {
     opts.objectMode = true;
     super(opts);
     this.hasHeadOutput = false;
+    this.lastmodDateOnly = opts.lastmodDateOnly || false;
     this.level = opts.level ?? ErrorLevel.WARN;
     this.xslUrl = opts.xslUrl;
   }
@@ -52,8 +55,12 @@ export class SitemapIndexStream extends Transform {
     } else {
       this.push(element(IndexTagNames.loc, item.url));
       if (item.lastmod) {
+        const lastmod: string = new Date(item.lastmod).toISOString();
         this.push(
-          element(IndexTagNames.lastmod, new Date(item.lastmod).toISOString())
+          element(
+            IndexTagNames.lastmod,
+            this.lastmodDateOnly ? lastmod.slice(0, 10) : lastmod
+          )
         );
       }
     }

tests/sitemap-index.test.ts

@@ -81,6 +81,42 @@ describe('sitemapIndex', () => {
 
     expect(result.toString()).toBe(expectedResult);
   });
+
+  it('build sitemap index with lastmodDateOnly', async () => {
+    const expectedResult =
+      xmlDef +
+      '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' +
+      '<sitemap>' +
+      '<loc>https://test.com/s1.xml</loc>' +
+      '<lastmod>2018-11-26</lastmod>' +
+      '</sitemap>' +
+      '<sitemap>' +
+      '<loc>https://test.com/s2.xml</loc>' +
+      '<lastmod>2018-11-27</lastmod>' +
+      '</sitemap>' +
+      '<sitemap>' +
+      '<loc>https://test.com/s3.xml</loc>' +
+      '</sitemap>' +
+      '</sitemapindex>';
+    const smis = new SitemapIndexStream({ lastmodDateOnly: true });
+    smis.write({
+      url: 'https://test.com/s1.xml',
+      lastmod: '2018-11-26T00:00:00.000Z',
+    });
+
+    smis.write({
+      url: 'https://test.com/s2.xml',
+      lastmod: '2018-11-27T00:00:00.000Z',
+    });
+
+    smis.write({
+      url: 'https://test.com/s3.xml',
+    });
+    smis.end();
+    const result = await streamToPromise(smis);
+
+    expect(result.toString()).toBe(expectedResult);
+  });
 });
 
 describe('sitemapAndIndex', () => {