Add support for allowed_mentions in EditMessage (#1709)

src/builder/create_allowed_mentions.rs

@@ -16,7 +16,8 @@ pub enum ParseValue {
 }
 
 /// A builder to manage the allowed mentions on a message,
-/// used by the [`ChannelId::send_message`] method.
+/// used by the [`ChannelId::send_message`] and
+/// [`ChannelId::edit_message`] methods.
 ///
 /// # Examples
 ///
@@ -60,6 +61,7 @@ pub enum ParseValue {
 /// ```
 ///
 /// [`ChannelId::send_message`]: crate::model::id::ChannelId::send_message
+/// [`ChannelId::edit_message`]: crate::model::id::ChannelId::edit_message
 #[derive(Clone, Debug)]
 pub struct CreateAllowedMentions(pub HashMap<&'static str, Value>);
 

src/builder/edit_message.rs

@@ -1,6 +1,6 @@
 use std::collections::HashMap;
 
-use super::CreateEmbed;
+use super::{CreateAllowedMentions, CreateEmbed};
 #[cfg(feature = "unstable_discord_api")]
 use crate::builder::CreateComponents;
 use crate::internal::prelude::*;
@@ -131,6 +131,20 @@ impl EditMessage {
         self
     }
 
+    /// Set the allowed mentions for the message.
+    pub fn allowed_mentions<F>(&mut self, f: F) -> &mut Self
+    where
+        F: FnOnce(&mut CreateAllowedMentions) -> &mut CreateAllowedMentions,
+    {
+        let mut allowed_mentions = CreateAllowedMentions::default();
+        f(&mut allowed_mentions);
+        let map = utils::hashmap_to_json_map(allowed_mentions.0);
+        let allowed_mentions = Value::Object(map);
+
+        self.0.insert("allowed_mentions", allowed_mentions);
+        self
+    }
+
     /// Sets the components of this message.
     #[cfg(feature = "unstable_discord_api")]
     pub fn components<F>(&mut self, f: F) -> &mut Self