Makes looking around a dropper arena possible

src/main/java/net/knarcraft/minigames/arena/dropper/DropperArenaSession.java

@@ -20,6 +20,7 @@ public class DropperArenaSession extends AbstractArenaSession {
     private final @NotNull DropperArena arena;
     private final @NotNull Player player;
     private final @NotNull DropperArenaGameMode gameMode;
+    private boolean startedMoving = false;
 
     /**
      * Instantiates a new dropper arena session
@@ -39,6 +40,22 @@ public class DropperArenaSession extends AbstractArenaSession {
         this.entryState.setArenaState();
     }
 
+    /**
+     * Marks that this arena's player has started moving
+     */
+    public void setStartedMoving() {
+        this.startedMoving = true;
+    }
+
+    /**
+     * Gets whether the player of this session has started moving in the arena
+     *
+     * @return <p>True if the player has started moving</p>
+     */
+    public boolean getStartedMoving() {
+        return this.startedMoving;
+    }
+
     /**
      * Gets the player playing in this session
      *
@@ -103,6 +120,12 @@ public class DropperArenaSession extends AbstractArenaSession {
         return new DropperGUI(player);
     }
 
+    @Override
+    public void reset() {
+        this.startedMoving = false;
+        super.reset();
+    }
+
     @Override
     protected void removeSession() {
         // Remove this session for game sessions to stop listeners from fiddling more with the player

src/main/java/net/knarcraft/minigames/listener/MoveListener.java

@@ -12,6 +12,7 @@ import net.knarcraft.minigames.config.DropperConfiguration;
 import net.knarcraft.minigames.config.Message;
 import net.knarcraft.minigames.config.ParkourConfiguration;
 import net.knarcraft.minigames.config.SharedConfiguration;
+import org.bukkit.Bukkit;
 import org.bukkit.Location;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
@@ -132,14 +133,26 @@ public class MoveListener implements Listener {
      * @param arenaSession <p>The dropper session of the player triggering the event</p>
      */
     private void doDropperArenaChecks(@NotNull PlayerMoveEvent event, @NotNull DropperArenaSession arenaSession) {
-        if (event.getTo() == null) {
+        // If the player has yet to move in the arena, allow them to look around
+        boolean startedMoving = arenaSession.getStartedMoving();
+        if (event.getTo() == null ||
+                (!startedMoving && isSameLocation(event.getFrom(), event.getTo()))) {
             return;
         }
+
+        // Marks the player as started moving if necessary, so they can no longer hang in the air
+        if (!startedMoving) {
+            arenaSession.setStartedMoving();
+        }
+
         // Prevent the player from flying upwards while in flight mode
         if (event.getFrom().getY() < event.getTo().getY() ||
                 (dropperConfiguration.blockSneaking() && event.getPlayer().isSneaking()) ||
                 (dropperConfiguration.blockSprinting() && event.getPlayer().isSprinting())) {
             event.setCancelled(true);
+            // Force movement downwards once the player lets go
+            Bukkit.getScheduler().scheduleSyncDelayedTask(MiniGames.getInstance(),
+                    () -> updatePlayerVelocity(arenaSession), 1);
             return;
         }
 
@@ -154,6 +167,18 @@ public class MoveListener implements Listener {
         updatePlayerVelocity(arenaSession);
     }
 
+    /**
+     * Checks if two locations are the same, excluding rotation
+     *
+     * @param location1 <p>The first location to check</p>
+     * @param location2 <p>The second location to check</p>
+     * @return <p>True if the locations are the same, excluding rotation</p>
+     */
+    private boolean isSameLocation(Location location1, Location location2) {
+        return location1.getX() == location2.getX() && location1.getY() == location2.getY() &&
+                location1.getZ() == location2.getZ();
+    }
+
     /**
      * Check if the player in the session is triggering a block with a special significance
      *