Added CustomModelDataArgParser

eco-api/src/main/java/com/willfp/eco/core/items/args/CustomModelDataArgParser.java

@@ -0,0 +1,57 @@
+package com.willfp.eco.core.items.args;
+
+import org.bukkit.inventory.ItemStack;
+import org.bukkit.inventory.meta.ItemMeta;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+import java.util.function.Predicate;
+
+/**
+ * Parse custom model data.
+ */
+public class CustomModelDataArgParser implements LookupArgParser {
+    @Override
+    public @Nullable Predicate<ItemStack> parseArguments(@NotNull final String[] args,
+                                                         @NotNull final ItemMeta meta) {
+        Integer modelData = null;
+
+        for (String arg : args) {
+            String[] argSplit = arg.split(":");
+            if (!argSplit[0].equalsIgnoreCase("custom-model-data")) {
+                continue;
+            }
+
+            if (argSplit.length < 2) {
+                continue;
+            }
+
+            String asString = argSplit[1];
+
+            try {
+                modelData = Integer.parseInt(asString);
+            } catch (NumberFormatException e) {
+                modelData = null;
+            }
+        }
+
+        if (modelData == null) {
+            return null;
+        }
+
+        meta.setCustomModelData(modelData);
+
+        int finalModelData = modelData;
+        return test -> {
+            if (!test.hasItemMeta()) {
+                return false;
+            }
+
+            ItemMeta testMeta = test.getItemMeta();
+
+            assert testMeta != null;
+
+            return testMeta.getCustomModelData() == finalModelData;
+        };
+    }
+}