dynamic datapack files

src/main/java/cy/jdkdigital/productivetrees/datagen/dynamic/DataGenPackFinder.java

@@ -0,0 +1,33 @@
+package cy.jdkdigital.productivetrees.datagen.dynamic;
+
+import cy.jdkdigital.productivetrees.ProductiveTrees;
+import cy.jdkdigital.productivetrees.registry.TreeFinder;
+import net.minecraft.network.chat.Component;
+import net.minecraft.server.packs.PackLocationInfo;
+import net.minecraft.server.packs.PackSelectionConfig;
+import net.minecraft.server.packs.PackType;
+import net.minecraft.server.packs.repository.*;
+
+import java.util.Optional;
+import java.util.function.Consumer;
+
+public class DataGenPackFinder implements RepositorySource
+{
+    private final PackType packType;
+
+    public DataGenPackFinder(PackType packType) {
+        this.packType = packType;
+    }
+
+    @Override
+    public void loadPacks(Consumer<Pack> consumer) {
+        var packInfo = new PackLocationInfo("productivetrees_" + packType.getDirectory(), Component.literal("Productive tree dynamic resources"), PackSource.BUILT_IN, Optional.of(new KnownPack(ProductiveTrees.MODID, "productivetrees_" + packType.getDirectory(), "1.0")));
+        Pack pack = Pack.readMetaAndCreate(
+                packInfo,
+                BuiltInPackSource.fromName((path) -> new DynamicDataPack(TreeFinder.DYNAMIC_RESOURCE_PATH, packType, packInfo)),
+                packType,
+                new PackSelectionConfig(true, Pack.Position.BOTTOM, false)
+        );
+        consumer.accept(pack);
+    }
+}

src/main/java/cy/jdkdigital/productivetrees/datagen/dynamic/DynamicDataPack.java

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+package cy.jdkdigital.productivetrees.datagen.dynamic;
+
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import cy.jdkdigital.productivetrees.ProductiveTrees;
+import net.minecraft.server.packs.PackLocationInfo;
+import net.minecraft.server.packs.PackType;
+import net.minecraft.server.packs.PathPackResources;
+import net.minecraft.server.packs.metadata.MetadataSectionSerializer;
+import net.minecraft.util.GsonHelper;
+import org.jetbrains.annotations.Nullable;
+
+import java.io.IOException;
+import java.nio.file.Path;
+
+public class DynamicDataPack extends PathPackResources
+{
+    private final Path rootPath;
+    private final PackType packType;
+    private final PackLocationInfo packInfo;
+
+    public DynamicDataPack(Path rootPath, PackType packType, PackLocationInfo packInfo) {
+        super(packInfo, rootPath);
+        ProductiveTrees.generateData();
+        this.rootPath = rootPath;
+        this.packType = packType;
+        this.packInfo = packInfo;
+    }
+
+    @Nullable
+    @Override
+    public <T> T getMetadataSection(MetadataSectionSerializer<T> metadataSectionSerializer) throws IOException {
+        JsonObject jsonobject = new JsonObject();
+        JsonObject packObject = new JsonObject();
+        packObject.addProperty("pack_format", packType.equals(PackType.SERVER_DATA) ? 48 : 34);
+        packObject.addProperty("description", ProductiveTrees.MODID);
+        jsonobject.add("pack", packObject);
+        if (!jsonobject.has(metadataSectionSerializer.getMetadataSectionName())) {
+            return null;
+        } else {
+            try {
+                return metadataSectionSerializer.fromJson(GsonHelper.getAsJsonObject(jsonobject, metadataSectionSerializer.getMetadataSectionName()));
+            } catch (JsonParseException jsonparseexception) {
+                return null;
+            }
+        }
+    }
+}