Implement changing a role's position (#201)

3 files changed, 59 insertions, 0 deletions

diff --git a/src/http/mod.rs b/src/http/mod.rs
index 0abed02..099a33c 100644
--- a/src/http/mod.rs
+++ b/src/http/mod.rs
@@ -814,6 +814,24 @@ pub fn edit_role(guild_id: u64, role_id: u64, map: &JsonMap) -> Result<Role> {
         .map_err(From::from)
 }
 
+/// Changes the position of a role in a guild.
+pub fn edit_role_position(guild_id: u64, role_id: u64, position: u64) -> Result<Vec<Role>> {
+    let body = serde_json::to_string(&json!({
+        "id": role_id,
+        "position": position,
+    }))?;
+    let response = request!(
+        Route::GuildsIdRolesId(guild_id),
+        patch(body),
+        "/guilds/{}/roles/{}",
+        guild_id,
+        role_id
+    );
+
+    serde_json::from_reader::<HyperResponse, Vec<Role>>(response)
+        .map_err(From::from)
+}
+
 /// Edits a the webhook with the given data.
 ///
 /// The Value is a map with optional values of:
diff --git a/src/model/guild/guild_id.rs b/src/model/guild/guild_id.rs
index 64e1181..622d059 100644
--- a/src/model/guild/guild_id.rs
+++ b/src/model/guild/guild_id.rs
@@ -303,6 +303,27 @@ impl GuildId {
         http::edit_role(self.0, role_id.into().0, &f(EditRole::default()).0)
     }
 
+    /// Edits the order of [`Role`]s
+    /// Requires the [Manage Roles] permission.
+    ///
+    /// # Examples
+    ///
+    /// Change the order of a role:
+    ///
+    /// ```rust,ignore
+    /// use serenity::model::{GuildId, RoleId};
+    /// GuildId(7).edit_role_position(RoleId(8), 2);
+    /// ```
+    ///
+    /// [`Role`]: struct.Role.html
+    /// [Manage Roles]: permissions/constant.MANAGE_ROLES.html
+    #[inline]
+    pub fn edit_role_position<R>(&self, role_id: R, position: u64) -> Result<Vec<Role>>
+        where R: Into<RoleId> {
+        http::edit_role_position(self.0, role_id.into().0, position)
+    }
+
+
     /// Search the cache for the guild.
     #[cfg(feature = "cache")]
     pub fn find(&self) -> Option<Arc<RwLock<Guild>>> { CACHE.read().unwrap().guild(*self) }
diff --git a/src/model/guild/mod.rs b/src/model/guild/mod.rs
index 5a5ab63..aa9fd1d 100644
--- a/src/model/guild/mod.rs
+++ b/src/model/guild/mod.rs
@@ -597,6 +597,26 @@ impl Guild {
         self.id.edit_role(role_id, f)
     }
 
+    /// Edits the order of [`Role`]s
+    /// Requires the [Manage Roles] permission.
+    ///
+    /// # Examples
+    ///
+    /// Change the order of a role:
+    ///
+    /// ```rust,ignore
+    /// use serenity::model::RoleId;
+    /// guild.edit_role_position(RoleId(8), 2);
+    /// ```
+    ///
+    /// [`Role`]: struct.Role.html
+    /// [Manage Roles]: permissions/constant.MANAGE_ROLES.html
+    #[inline]
+    pub fn edit_role_position<R>(&self, role_id: R, position: u64) -> Result<Vec<Role>>
+        where R: Into<RoleId> {
+        self.id.edit_role_position(role_id, position)
+    }
+
     /// Gets a partial amount of guild data by its Id.
     ///
     /// Requires that the current user be in the guild.