Allow for reward grouping.

This commit makes the MAUtils class responsible for parsing reward maps
use the new ThingPickerManager to parse the reward lists. As a result,
the new `all()` and `random()` pickers are available for use in the
rewards section.

This should allow for granting item sets and similar types of "bundles"
as rewards in the arena, e.g. a diamond sword and permission to join a
more difficult arena.

Closes #386

changelog.md

@@ -18,6 +18,7 @@ These changes will (most likely) be included in the next version.
 - Boss names now support color codes.
 - New per-arena setting `arena-warp-offset` can be used to spread out players randomly by an offset from the arena warp. This should help prevent players taking suffocation damage.
 - New per-arena setting `announcer-type` determines where to display per-arena announcements such as wave spawns, auto start timers, boss abilities, and death messages. Options are `title` (default) or `chat`.
+- It is now possible to group rewards. For example, `all(stick, bone)` results a stick and a bone, while `random(all(stick, bone), all(dirt, stone))` results in getting _either_ a stick and a bone _or_ a dirt block and a stone block.
 - The Root Target ability now uses potion effects (slowness, slow falling, and negative jump boost) instead of repeated teleports. This should make for a smoother root experience.
 - Using `spectate-on-death: true` no longer forces players out to their join location/exit warp before moving them to the spectator area. This should prevent "jumpy" behavior in multi-world setups.
 - Players should now properly respawn at the spectator area rather than at world spawn on servers with plugins that override respawn locations.

src/main/java/com/garbagemule/MobArena/MAUtils.java

@@ -4,9 +4,6 @@ import com.garbagemule.MobArena.framework.Arena;
 import com.garbagemule.MobArena.framework.ArenaMaster;
 import com.garbagemule.MobArena.region.ArenaRegion;
 import com.garbagemule.MobArena.things.InvalidThingInputString;
-import com.garbagemule.MobArena.things.RandomThingPicker;
-import com.garbagemule.MobArena.things.SingleThingPicker;
-import com.garbagemule.MobArena.things.Thing;
 import com.garbagemule.MobArena.things.ThingPicker;
 import com.garbagemule.MobArena.util.TextUtils;
 import org.bukkit.Location;
@@ -64,17 +61,13 @@ public class MAUtils
             String path = typePath + "." + wave;
             String rewards = config.getString(path);
 
-            List<ThingPicker> pickers = new ArrayList<>();
-            for (String reward : rewards.split(",")) {
-                try {
-                    Thing thing = plugin.getThingManager().parse(reward.trim());
-                    ThingPicker picker = new SingleThingPicker(thing);
-                    pickers.add(picker);
-                } catch (InvalidThingInputString e) {
-                    throw new ConfigError("Failed to parse reward for wave " + wave + " in the '" + type + "' branch of arena " + arena + ": " + e.getInput());
-                }
+            try {
+                String wrapped = "random(" + rewards + ")";
+                ThingPicker picker = plugin.getThingPickerManager().parse(wrapped);
+                result.put(wave, picker);
+            } catch (InvalidThingInputString e) {
+                throw new ConfigError("Failed to parse reward for wave " + wave + " in the '" + type + "' branch of arena " + arena + ": " + e.getInput());
             }
-            result.put(wave, new RandomThingPicker(pickers, MobArena.random));
         }
         return result;
     }