remove duplicate logic from export service

apps/app/src/server/service/export.ts

@@ -402,83 +402,6 @@ class ExportService {
     return readable;
   }
 
-  getPageReadableStream(basePagePath: string) {
-    const Page = this.crowi.model('Page') as PageModel;
-    const { PageQueryBuilder } = Page;
-
-    const builder = new PageQueryBuilder(Page.find())
-      .addConditionToListOnlyDescendants(basePagePath);
-
-    return builder
-      .query
-      .populate('revision')
-      .lean()
-      .cursor({ batchSize: 100 }); // get stream
-  }
-
-  setUpArchiver(): Archiver {
-    // decide zip file path
-    const timeStamp = (new Date()).getTime();
-    const zipFilePath = path.join(__dirname, `${timeStamp}.md.zip`);
-
-    const archive = archiver('zip', {
-      zlib: { level: 9 }, // maximum compression
-    });
-
-    // good practice to catch warnings (ie stat failures and other non-blocking errors)
-    archive.on('warning', (err) => {
-      if (err.code === 'ENOENT') logger.error(err);
-      else throw err;
-    });
-    // good practice to catch this error explicitly
-    archive.on('error', (err) => { throw err });
-
-    // pipe archive data to the file
-    const output = fs.createWriteStream(zipFilePath);
-    archive.pipe(output);
-
-    return archive;
-  }
-
-  async bulkExportWithBasePagePath(basePagePath: string): Promise<void> {
-    // get pages with descendants as stream
-    const pageReadableStream = this.getPageReadableStream(basePagePath);
-
-    const archive = this.setUpArchiver();
-
-    // read from pageReadableStream, then append each page to archiver
-    // pageReadableStream.pipe(pagesWritable) below will pipe the stream
-    const pagesWritable = new Writable({
-      objectMode: true,
-      async write(page: PageDocument, encoding, callback) {
-        try {
-          const revision = page.revision;
-
-          if (revision != null && isPopulated(revision)) {
-            const markdownBody = revision.body;
-            // write to zip
-            const pathNormalized = normalizePath(page.path);
-            archive.append(markdownBody, { name: `${pathNormalized}.md` });
-          }
-        }
-        catch (err) {
-          logger.error(err);
-          throw Error('だめ');
-        }
-
-        callback();
-      },
-      final(callback) {
-        archive.finalize();
-        callback();
-      },
-    });
-
-    pageReadableStream.pipe(pagesWritable);
-
-    await streamToPromise(archive);
-  }
-
 }
 
 // eslint-disable-next-line import/no-mutable-exports