chore: use VecDeque for music queue

src/music/music_queue.rs

@@ -2,11 +2,19 @@ use serenity::all::GuildId;
 use songbird::input::YoutubeDl;
 use tokio::sync::Mutex;
 
-use std::collections::HashMap;
+use std::collections::{HashMap, VecDeque};
 use std::sync::Arc;
 
 type MusicQueueItem = Arc<Mutex<MusicQueue>>;
 
+#[derive(Debug)]
+pub struct MusicQueue {
+    // God this sucks. This needs to be reprogrammed properly.
+    pub guild_id: GuildId,
+    pub queue: VecDeque<YoutubeDl>,
+    pub now_playing: Option<YoutubeDl>,
+}
+
 lazy_static! {
     static ref HASHMAP: Mutex<HashMap<GuildId, MusicQueueItem>> = Mutex::new(HashMap::new());
 }
@@ -18,7 +26,7 @@ async fn get_music_queue(guild_id: &GuildId) -> MusicQueueItem {
         .entry(*guild_id)
         .or_insert(Arc::new(Mutex::new(MusicQueue {
             guild_id: *guild_id,
-            queue: Vec::new(),
+            queue: VecDeque::new(),
             now_playing: None,
         })))
         .clone()
@@ -35,14 +43,6 @@ where
     f(&mut queue)
 }
 
-#[derive(Debug)]
-pub struct MusicQueue {
-    // God this sucks. This needs to be reprogrammed properly.
-    pub guild_id: GuildId,
-    pub queue: Vec<YoutubeDl>,
-    pub now_playing: Option<YoutubeDl>,
-}
-
 pub async fn delete_queue(guild_id: &GuildId) {
     with_music_queue(guild_id, |queue| {
         queue.now_playing = None;
@@ -52,21 +52,11 @@ pub async fn delete_queue(guild_id: &GuildId) {
 }
 
 pub async fn add_to_queue(guild_id: &GuildId, input: YoutubeDl) {
-    with_music_queue(guild_id, |queue| {
-        queue.queue.push(input);
-    })
-    .await;
+    with_music_queue(guild_id, |queue| queue.queue.push_back(input)).await;
 }
 
 pub async fn get_head(guild_id: &GuildId) -> Option<YoutubeDl> {
-    with_music_queue(guild_id, |queue| {
-        if queue.queue.is_empty() {
-            None
-        } else {
-            Some(queue.queue.remove(0))
-        }
-    })
-    .await
+    with_music_queue(guild_id, |queue| queue.queue.pop_front()).await
 }
 
 pub async fn set_now_playing(guild_id: &GuildId, now_playing: Option<YoutubeDl>) {