How to use

hasDoc

function

in

DocumentStore

updateIndexForFile(file) {
  const filePath = path.relative(this.basePath, file);
  this.files.push(filePath);

  return fs.readFile(path.join(this.basePath, filePath), 'utf8')
   .then(content => {
    const doc = {
     file: filePath,
     filename: path.basename(filePath, path.extname(filePath)),
     content
    };
    this.index[this.index.documentStore.hasDoc(filePath) ? 'updateDoc' : 'addDoc'](doc);
    return doc;
   });
 }