Added roll command

+ clippy + fmt

src/discord/joke.rs

@@ -10,6 +10,10 @@ use serenity::framework::standard::{Args, CommandResult};
 use serenity::model::channel::Message;
 use std::collections::HashMap;
 
+#[group]
+#[commands(dad_joke, fortune, roll)]
+pub struct Joke;
+
 #[derive(Clone, Serialize, Deserialize)]
 struct DadJoke {
     pub id: String,
@@ -17,10 +21,6 @@ struct DadJoke {
     pub status: i32,
 }
 
-#[group]
-#[commands(dad_joke, fortune)]
-pub struct Joke;
-
 #[command]
 #[only_in(guilds)]
 #[aliases("dad")]
@@ -104,3 +104,20 @@ async fn fortune(ctx: &Context, msg: &Message, _args: Args) -> CommandResult {
 
     Ok(())
 }
+
+#[command]
+#[only_in(guilds)]
+#[aliases("roll")]
+#[description("Roll a die!")]
+async fn roll(ctx: &Context, msg: &Message, args: Args) -> CommandResult {
+    let roll = args.rest().parse::<ndm::Dice>();
+
+    let reply = match roll {
+        Ok(roll) => format!("You rolled: **{}**", roll),
+        Err(_) => "Error parsing dice roll".to_string(),
+    };
+
+    msg.reply(&ctx.http, reply).await?;
+
+    Ok(())
+}