Make new aggregations searchable

Why these changes are being introduced:

We added some more aggregations as part of the ongoing work, but

Relevant ticket(s):

* (GDT-128)[https://mitlibraries.atlassian.net/browse/GDT-128]

How this addresses that need:

This adds the new aggregations to the Enhancer and QueryBuilder models,
and adds them to the query in the TimdexSearch model.

Side effects of this change:

* VCR cassettes have been regenerated.
* In the filter partial, `to_sym` calls on the filter category have
been removed. These are no longer needed as all filter categories
are cast as symbols in the search controller.
* This is another instance of something that has come up recently:
the need to develop an E2E testing strategy for our Rails apps,
particularly those that are API consumers. We can test this using
our standard VCR process, but that is likely to break when
cassettes are regenerated and the search results change.

app/models/enhancer.rb

@@ -2,7 +2,9 @@ class Enhancer
   attr_accessor :enhanced_query
 
   QUERY_PARAMS = %i[q citation contentType contributors fundingInformation identifiers locations subjects title].freeze
-  FILTER_PARAMS = %i[sourceFilter contentTypeFilter].freeze
+  FILTER_PARAMS = %i[contentTypeFilter contributorsFilter formatFilter languagesFilter literaryFormFilter sourceFilter
+                     subjectsFilter].freeze
+
   # accepts all params as each enhancer may require different data
   def initialize(params)
     @enhanced_query = {}

app/models/query_builder.rb

@@ -3,7 +3,8 @@ class QueryBuilder
 
   RESULTS_PER_PAGE = 20
   QUERY_PARAMS = %w[q citation contributors fundingInformation identifiers locations subjects title].freeze
-  FILTER_PARAMS = %i[sourceFilter contentTypeFilter].freeze
+  FILTER_PARAMS = %i[contentTypeFilter contributorsFilter formatFilter languagesFilter literaryFormFilter sourceFilter
+                     subjectsFilter].freeze
 
   def initialize(enhanced_query)
     @query = {}

app/models/timdex_search.rb

@@ -12,10 +12,15 @@ class TimdexSearch < TimdexBase
       $locations: String
       $subjects: String
       $title: String
-      $sourceFilter: [String!]
       $index: String
       $from: String
       $contentTypeFilter: [String!]
+      $contributorsFilter: [String!]
+      $formatFilter: [String!]
+      $languagesFilter: [String!]
+      $literaryFormFilter: String
+      $sourceFilter: [String!]
+      $subjectsFilter: [String!]
     ) {
       search(
         searchterm: $q
@@ -26,10 +31,15 @@ class TimdexSearch < TimdexBase
         locations: $locations
         subjects: $subjects
         title: $title
-        sourceFilter: $sourceFilter
         index: $index
         from: $from
         contentTypeFilter: $contentTypeFilter
+        contributorsFilter: $contributorsFilter
+        formatFilter: $formatFilter
+        languagesFilter: $languagesFilter
+        literaryFormFilter: $literaryFormFilter
+        sourceFilter: $sourceFilter
+        subjectsFilter: $subjectsFilter
       ) {
         hits
         records {

app/views/search/_filter.html.erb

@@ -1,17 +1,17 @@
 <% return if values.blank? %>
 
 <div class="category">
-  <button class="filter-label <%= 'expanded' if @enhanced_query[category.to_sym].present? || first == true %>"
+  <button class="filter-label <%= 'expanded' if @enhanced_query[category].present? || first == true %>"
           onclick="toggleFilter(this)"><%= nice_labels[category] || category %></button>
   <div class="filter-options">
     <ul class="category-terms list-unbulleted">
     <% values.each do |term| %>
       <li class="term">
         <% if filter_applied?(@enhanced_query[category.to_sym], term['key']) %>
-          <a href="<%= results_path(remove_filter(@enhanced_query, category.to_sym, term['key'])) %>" class="applied">
+          <a href="<%= results_path(remove_filter(@enhanced_query, category, term['key'])) %>" class="applied">
           <span class="sr">Remove applied filter?</span>
         <% else %>
-          <a href="<%= results_path(add_filter(@enhanced_query, category.to_sym, term['key'])) %>">
+          <a href="<%= results_path(add_filter(@enhanced_query, category, term['key'])) %>">
         <% end %>
           <span class="name"><%= term['key'] %></span>
           <span class="count"><%= term['docCount'] %> <span class="sr">records</span></span>