improving sigs for new components

sig/plugins/multipart.rbs

@@ -4,6 +4,7 @@ module HTTPX
       def self.load_dependencies: (singleton(Session)) -> void
       def self.configure: (*untyped) -> void
       def self?.encode: (untyped) -> (Encoder | Transcoder::Form::Encoder)
+      def self?.decode: (HTTPX::Response response) -> Transcoder::_Decoder
 
       type multipart_value = string | Pathname | File | _Reader
 
@@ -30,6 +31,37 @@ module HTTPX
         def read_from_part: (Integer? max_length) -> void
       end
 
+      class Decoder
+        BOUNDARY_RE: Regexp
+
+        @state: :idle | :part_header | :part_body | :parse_boundary | :done
+        @buffer: String
+        @parts: Hash[String, untyped]
+        @boundary: String
+        @intermediate_boundary: String
+
+        def call: (Response response, untyped) -> Hash[String, untyped]
+
+        private
+
+        def initialize: (Response response) -> void
+
+        def parse: () -> void
+
+        def get_filename: (String head) -> String?
+      end
+
+      class FilePart #  < SimpleDelegator
+        attr_reader original_filename: String
+        attr_reader content_type: String
+
+        # @file: Tempfile
+
+        # private
+
+        def initialize: (String filename, String content_type) -> void
+      end
+
       module Part
         def self?.call: (multipart_nested_value) -> ([_Reader, String, String?])
       end

sig/transcoder.rbs

@@ -21,7 +21,7 @@ module HTTPX
     end
 
     interface _Decoder
-      def decode: (string) -> String
+      def call: (Response response, untyped options) -> untyped
     end
   end
 end

sig/transcoder/form.rbs

@@ -7,6 +7,7 @@ module HTTPX::Transcoder
 
   module Form
     def self?.encode: (urlencoded_input form) -> Encoder
+    def self?.decode: (HTTPX::Response response) -> _Decoder
 
     class Encoder
       extend Forwardable

sig/transcoder/json.rbs

@@ -1,6 +1,7 @@
 module HTTPX::Transcoder
   module JSON
     def self?.encode: (_ToJson json) -> Encoder
+    def self?.decode: (HTTPX::Response response) -> _Decoder
 
     class Encoder
       extend Forwardable