Move Output type and method fn from dynamic::Payload to new DynMethod trait

src/requests/dynamic.rs

@@ -2,21 +2,16 @@ use serde::de::DeserializeOwned;
 use reqwest::multipart;
 
 use crate::{Bot, network};
-use super::{ResponseResult, Method};
+use super::{ResponseResult, DynMethod};
 
+/// [`Payload`] kind. Used to determinate the way for sending request.
 pub enum Kind {
     Simple,
     Json(String),
     Multipart(multipart::Form),
 }
 
-pub trait Payload {
-    // NOTE: This payload doesn't use `Method` and reinvent `type Output`
-    //  because the trait `Method` cannot be made into an object.
-    type Output;
-
-    fn method(&self) -> &str;
-
+pub trait Payload: DynMethod {
     fn kind(&self) -> Kind;
 }
 

src/requests/json.rs

@@ -7,9 +7,9 @@ pub trait Payload: Serialize + Method {}
 
 /// Ready-to-send telegram request.
 ///
-/// Note: params will be sent to telegram using [`json`]
+/// Note: params will be sent to telegram using [`application/json`]
 ///
-/// [`json`]: // TODO: libk to tgdoc
+/// [`application/json`]: https://core.telegram.org/bots/api#making-requests
 #[must_use = "requests do nothing until sent"]
 pub struct Request<'b, P> {
     bot: &'b Bot,

src/requests/mod.rs

@@ -118,7 +118,24 @@ pub trait Method {
     const METHOD: &'static str;
 }
 
-pub mod json;
-pub mod multipart;
-pub mod simple;
-pub mod dynamic;
+/// Signature of telegram method.
+///
+/// Note: this trait is very similar to [`Method`] trait, however it can be used
+/// as trait object.
+pub trait DynMethod {
+    type Output;
+
+    /// Return name of the method.
+    fn method(&self) -> &str;
+}
+
+impl<T> DynMethod for T
+where
+    T: Method
+{
+    type Output = T::Output;
+
+    fn method(&self) -> &str {
+        T::METHOD
+    }
+}

src/requests/multipart.rs

@@ -12,7 +12,7 @@ pub trait Payload: Method {
 ///
 /// Note: params will be sent to telegram using [`multipart/form-data`]
 ///
-/// [`multipart/form-data`]: // TODO: libk to tgdoc
+/// [`multipart/form-data`]: https://core.telegram.org/bots/api#making-requests
 #[must_use = "requests do nothing until sent"]
 pub struct Request<'b, P> {
     bot: &'b Bot,