Adds opensearch geo_bounding_box query support

Relevant ticket(s):

* https://mitlibraries.atlassian.net/browse/GDT-167

How does this address that need:

* Adds an optional geo_bounding_box search to our existing opensearch
  query builder

Author: JPrevost

app/models/opensearch.rb

@@ -111,9 +111,34 @@ def matches
     match_single_field_nested(:subjects, m)
 
     match_geodistance(m) if @params[:geodistance].present?
+    match_geobox(m) if @params[:geobox].present?
     m
   end
 
+  # https://opensearch.org/docs/latest/query-dsl/geo-and-xy/geo-bounding-box/
+  def match_geobox(match_array)
+    match_array << {
+      bool: {
+        must: {
+          match_all: {}
+        },
+        filter: {
+          geo_bounding_box: {
+            'locations.geoshape': {
+              top: @params[:geobox][:max_latitude],
+              bottom: @params[:geobox][:min_latitude],
+              left: @params[:geobox][:min_longitude],
+              right: @params[:geobox][:max_longitude]
+            }
+          }
+        }
+      }
+    }
+  end
+
+  # https://www.elastic.co/guide/en/elasticsearch/reference/7.17/query-dsl-geo-distance-query.html
+  # Note: at the time of this implementation, opensearch does not have documentation on
+  # this features hence the link to the prefork elasticsearch docs
   def match_geodistance(match_array)
     match_array << {
       bool: {

test/models/opensearch_test.rb

@@ -279,6 +279,8 @@ class OpensearchTest < ActiveSupport::TestCase
     os.instance_variable_set(:@params,
                              { geodistance: { latitude: '42.361145', longitude: '-71.057083', distance: '50mi' } })
 
+    refute(os.matches.to_json.include?('{"multi_match":{"query":'))
+
     assert(
       os.query.to_json.include?('{"distance":"50mi","locations.geoshape":{"lat":"42.361145","lon":"-71.057083"}}')
     )
@@ -296,4 +298,31 @@ class OpensearchTest < ActiveSupport::TestCase
       os.query.to_json.include?('{"distance":"50mi","locations.geoshape":{"lat":"42.361145","lon":"-71.057083"}}')
     )
   end
+
+  test 'can search by bounding box' do
+    os = Opensearch.new
+    os.instance_variable_set(:@params,
+                             { geobox: { max_latitude: '42.886', min_latitude: '41.239',
+                                         max_longitude: '-73.928', min_longitude: '-69.507' } })
+
+    refute(os.matches.to_json.include?('{"multi_match":{"query"'))
+
+    assert(
+      os.query.to_json.include?('{"locations.geoshape":{"top":"42.886","bottom":"41.239","left":"-69.507","right":"-73.928"}}')
+    )
+  end
+
+  test 'can search by bounding box and keyword' do
+    os = Opensearch.new
+    os.instance_variable_set(:@params,
+                             { geobox: { max_latitude: '42.886', min_latitude: '41.239',
+                                         max_longitude: '-73.928', min_longitude: '-69.507' },
+                               q: 'rail stations' })
+
+    assert(os.matches.to_json.include?('{"multi_match":{"query":"rail stations","fields":'))
+
+    assert(
+      os.query.to_json.include?('{"locations.geoshape":{"top":"42.886","bottom":"41.239","left":"-69.507","right":"-73.928"}}')
+    )
+  end
 end