[api] Permite solicitar lista de filtros a serem processados pelo Solr.

#1215

bireme/api/bibliographic.py

@@ -80,6 +80,7 @@ def get_search(self, request, **kwargs):
         op = request.GET.get('op', 'search')
         id = request.GET.get('id', '')
         sort = request.GET.get('sort', 'publication_date desc')
+        facet_list = request.GET.getlist('facet.field', [])
 
         # filter result by status = -3 (Migration) OR 0 (LILACS Express) OR 1 (published)
         if fq != '':
@@ -93,6 +94,16 @@ def get_search(self, request, **kwargs):
         search_params = {'site': settings.SEARCH_INDEX, 'op': op, 'output': 'site', 'lang': lang,
                          'q': q, 'fq': fq, 'start': start, 'count': count, 'id': id, 'sort': sort}
 
+        if facet_list:
+            search_params['facet.field'] = []
+            for facet_field in facet_list:
+                search_params['facet.field'].append(facet_field)
+                facet_limit_param = 'f.{}.facet.limit'.format(facet_field)
+                facet_field_limit = request.GET.get(facet_limit_param, None)
+                if facet_field_limit:
+                    search_params[facet_limit_param] = facet_field_limit
+
+
         r = requests.post(search_url, data=search_params)
 
         self.log_throttled_access(request)