Allow hotlinking to searches in results page.

[bmschmidt]

Issue from code4lib discussions. The idea is that the search UI can look at the hash so that https://minicomp.github.io/wax/search/#Qatar opens up a search directly to items matching the string "#Qatar".

Happy to have this assigned to me if it's desirable.

One question is whether entering a search should also update the hash dynamically as well.

function startSearchUI(fields, indexFile, url) {
  $.getJSON(indexFile, function(store) {
    var index  = new elasticlunr.Index;

    index.saveDocument(false);
    index.setRef('lunr_id');

    for (i in fields) { index.addField(fields[i]); }
    for (i in store)  { index.addDoc(store[i]); }

    function run_search(terms) {
      var results_div = $('#results');
      var query       = terms
      var results     = index.search(query, { boolean: 'AND', expand: true });

      results_div.empty();
      results_div.append(`<p class="results-info">Displaying ${results.length} results</p>`);

      for (var r in results) {
        var ref    = results[r].ref;
        var item   = store[ref];
        var result = displayResult(item, fields, url);

        results_div.append(result);
      }
    }
    if (window.location.hash) {
      var search = decodeURIComponent(window.location.hash.slice(1);
      $('input#search').val(search) // Is this how you assign in jquery?
      run_search(search)
    }
    $('input#search').on('keyup', function() {
      var query       = $(this).val();
      run_search(query)
      }
    });
  });
}