Merge branch 'dev' into master

src/main/java/sh/okx/rankup/requirements/requirement/ItemRequirement.java

@@ -9,6 +9,8 @@ import sh.okx.rankup.requirements.DeductibleRequirement;
 import sh.okx.rankup.requirements.ProgressiveRequirement;
 import sh.okx.rankup.requirements.Requirement;
 
+import java.util.Arrays;
+
 public class ItemRequirement extends DeductibleRequirement {
   public ItemRequirement(Rankup plugin) {
     super(plugin, "item", true);
@@ -18,25 +20,25 @@ public class ItemRequirement extends DeductibleRequirement {
     super(clone);
   }
 
-  @Override
-  public double getProgress(Player player) {
-    Material material = Material.matchMaterial(getSub());
-    int count = 0;
-    for (ItemStack item : player.getInventory().getStorageContents()) {
-      if (item != null && item.getType() == material) {
-        count += item.getAmount();
-      }
-    }
-    return count;
-  }
-
   @Override
   public void apply(Player player, double multiplier) {
-    player.getInventory().removeItem(new ItemStack(Material.matchMaterial(getSub()), (int) (getValueInt() * multiplier)));
+    Material type = Material.matchMaterial(getSub());
+    if (type == null) {
+      throw new IllegalArgumentException("Invalid item " + getSub());
+    }
+    player.getInventory().removeItem(new ItemStack(type, (int) (getValueInt() * multiplier)));
   }
 
   @Override
   public Requirement clone() {
     return new ItemRequirement(this);
   }
+
+  @Override
+  public double getProgress(Player player) {
+    Material material = Material.matchMaterial(getSub());
+    return Arrays.stream(player.getInventory().getStorageContents())
+        .filter(item -> item != null && item.getType() == material)
+        .mapToInt(ItemStack::getAmount).sum();
+  }
 }

src/main/java/sh/okx/rankup/requirements/requirement/MobKillsRequirement.java

@@ -18,6 +18,7 @@ public class MobKillsRequirement extends ProgressiveRequirement {
     super(clone);
   }
 
+  @SuppressWarnings("deprecation")
   @Override
   public double getProgress(Player player) {
     EntityType entity = Objects.requireNonNull(EntityType.fromName(getSub()), "Invalid entity type '" + getSub() + "' in mob-kills requirement.");

src/main/java/sh/okx/rankup/requirements/requirement/TotalMobKillsRequirement.java

@@ -11,7 +11,7 @@ public class TotalMobKillsRequirement extends ProgressiveRequirement {
     super(plugin, "total-mob-kills");
   }
 
-  protected TotalMobKillsRequirement(Requirement clone) {
+  private TotalMobKillsRequirement(Requirement clone) {
     super(clone);
   }