[API] Generator: Find structure needs NDJSON input option

Author: picandocodigo

elasticsearch-api/utils/thor/generator/endpoint_specifics.rb

@@ -170,6 +170,10 @@ def bulk_body_helper
         SRC
       end
 
+      def find_structure_body_helper
+        bulk_body_helper
+      end
+
       def bulk_doc_helper(info)
         <<~SRC
           # @option arguments [String|Array] :body #{info}. Array of Strings, Header/Data pairs,

elasticsearch-api/utils/thor/templates/_perform_request.erb

@@ -14,7 +14,7 @@ when 'mtermvectors'
 <%- else -%>
   <%= '  '*(@namespace_depth+3) %>body   = <%= @spec['body'].nil? ? 'nil' : 'arguments[:body]' %>
 <%- end -%>
-<%- if ['bulk', 'msearch', 'msearch_template'].include? @method_name -%>
+<%- if ['bulk', 'msearch', 'msearch_template', 'find_structure'].include? @method_name -%>
   <%= self.send("#{@method_name}_body_helper".to_s) %>
   headers.merge!("Content-Type" => "application/x-ndjson")
   <%= '  '*(@namespace_depth+4) %>perform_request(method, path, params, payload, headers).body

elasticsearch-xpack/lib/elasticsearch/xpack/api/actions/text_structure/find_structure.rb

@@ -57,7 +57,14 @@ def find_structure(arguments = {})
             params = Elasticsearch::API::Utils.__validate_and_extract_params arguments, ParamsRegistry.get(__method__)
 
             body = arguments[:body]
-            perform_request(method, path, params, body, headers).body
+            if body.is_a? Array
+              payload = Elasticsearch::API::Utils.__bulkify(body)
+            else
+              payload = body
+            end
+
+            headers.merge!("Content-Type" => "application/x-ndjson")
+            perform_request(method, path, params, payload, headers).body
           end
 
           # Register this action with its valid params when the module is loaded.