function launchSearch()

in static/api/python/3.0.x/search.js [246:334]
67 lines of code
15 McCabe index (conditional complexity)

function launchSearch(noDelay){
  let _searchStartTime = performance.now();

  // Get the query terms 
  let _query = input.value;

  // In chrome, two events are triggered simultaneously for the input event.
  // So we discard consecutive (within the same 0.001s) requests that have the same search query.
  if ((
    (_searchStartTime-_lastSearchStartTime) < (0.001*1000)
    ) && (_query === _lastSearchInput) ){
      return;
  }

  updateClearSearchBtn();

  // Setup query meta infos.
  _lastSearchStartTime = _searchStartTime
  _lastSearchInput = _query;

  if (_query.length===0){
    stopSearching();
    return;
  }

  if (!window.Worker) {
    setStatus("Cannot search: JavaScript Worker API is not supported in your browser. ");
    return;
  }
  
  resetResultList();
  showResultContainer();
  setStatus("...");

  // Determine indexURL
  let indexURL = _isSearchInDocstringsEnabled() ? "fullsearchindex.json" : "searchindex.json";
  
  // If search in docstring is enabled: 
  //  -> customize query function to include docstring for clauses applicable for all fields
  let _fields = _isSearchInDocstringsEnabled() ? ["name", "names", "qname", "docstring"] : ["name", "names", "qname"];

  resetLongSearchTimerInfo();
  launchLongSearchTimerInfo();
  
  // Get search delay, wait the all search resources to be cached and actually launch the search 
  return _getSearchDelayPromise(indexURL).then((searchDelay) => {
  if (isSearchReadyPromise==null){
    isSearchReadyPromise = _getIsSearchReadyPromise()
  }
  return isSearchReadyPromise.then((r)=>{ 
  return lunrSearch(_query, indexURL, _fields, "lunr.js", !noDelay?searchDelay:0).then((lunrResults) => { 

      // outdated query results
      if (_searchStartTime != _lastSearchStartTime){return;}
      
      if (!lunrResults){
        setErrorStatus();
        throw new Error("No data to show");
      }

      if (lunrResults.length == 0){
        setStatus('No results matches "' + htmlEncode(_query) + '"');
        resetLongSearchTimerInfo();
        return;
      }

      setStatus("One sec...");

      // Get result data
      return fetchResultsData(lunrResults, "all-documents.html").then((documentResults) => {

        // outdated query results
        if (_searchStartTime != _lastSearchStartTime){return;}

        // Edit DOM
        resetLongSearchTimerInfo();
        displaySearchResults(_query, documentResults, lunrResults)
        
        // Log stats
        console.log('Search for "' + _query + '" took ' + 
          ((performance.now() - _searchStartTime)/1000).toString() + ' seconds.')

        // End
      })
  }); // lunrResults promise resolved
  });
  }).catch((err) => {_handleErr(err);});

} // end search() function