refactor Request#param_parser

src/kemal/ext/request.cr

@@ -0,0 +1,36 @@
+class HTTP::Request
+  property override_method
+  property url_params : Hash(String, String)?
+  @param_parser : Kemal::ParamParser?
+
+  def override_method
+    @override_method ||= check_for_method_override!
+  end
+
+  def content_type
+    @headers["Content-Type"]?
+  end
+
+  def param_parser
+    @param_parser ||= Kemal::ParamParser.new(self)
+  end
+
+  # Checks if method contained in _method param is valid one
+  def self.override_method_valid?(override_method : String)
+    return false unless override_method.is_a?(String)
+    override_method = override_method.upcase
+    override_method == "PUT" || override_method == "PATCH" || override_method == "DELETE"
+  end
+
+  # Checks if request params contain _method param to override request incoming method
+  private def check_for_method_override!
+    @override_method = @method
+    if @method == "POST"
+      params = param_parser.body
+      if params.has_key?("_method") && HTTP::Request.override_method_valid?(params["_method"])
+        @override_method = params["_method"]
+      end
+    end
+    @override_method
+  end
+end