Add Member::permissions

src/error.rs

@@ -139,6 +139,12 @@ impl From<ParseIntError> for Error {
     }
 }
 
+impl From<ModelError> for Error {
+    fn from(e: ModelError) -> Error {
+        Error::Model(e)
+    }
+}
+
 #[cfg(feature="voice")]
 impl From<OpusError> for Error {
     fn from(e: OpusError) -> Error {

src/model/guild/member.rs

@@ -218,6 +218,33 @@ impl Member {
         self.guild_id.kick(self.user.read().unwrap().id)
     }
 
+    /// Returns the permissions for the member.
+    ///
+    /// # Examples
+    ///
+    /// ```rust,ignore
+    /// // assuming there's a `member` variable gotten from anything.
+    /// println!("The permission bits for the member are: {}", member.permissions().expect("permissions").bits);
+    /// ```
+    ///
+    /// # Errors
+    ///
+    /// Returns a [`ModelError::GuildNotFound`] if the guild the member's in could not be
+    /// found in the cache.
+    ///
+    /// [`ModelError::GuildNotFound`]: enum.ModelError.html#variant.GuildNotFound
+    #[cfg(feature="cache")]
+    pub fn permissions(&self) -> Result<Permissions> {
+        let guild = match self.guild_id.find() {
+            Some(guild) => guild,
+            None => return Err(From::from(ModelError::GuildNotFound)),  
+        };
+
+        let guild = guild.read().unwrap();
+
+        Ok(guild.permissions_for(ChannelId(guild.id.0), self.user.read().unwrap().id))
+    }
+
     /// Removes a [`Role`] from the member, editing its roles in-place if the
     /// request was successful.
     ///