Rework custom recipe system (#3232)

src/main/java/appeng/recipes/AERecipeLoader.java

@@ -0,0 +1,121 @@
+
+package appeng.recipes;
+
+
+import java.io.BufferedReader;
+import java.io.IOException;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+
+import com.google.gson.Gson;
+import com.google.gson.GsonBuilder;
+import com.google.gson.JsonObject;
+import com.google.gson.JsonParseException;
+import com.google.gson.JsonSyntaxException;
+
+import org.apache.commons.io.FilenameUtils;
+import org.apache.commons.io.IOUtils;
+
+import net.minecraft.util.JsonUtils;
+import net.minecraft.util.ResourceLocation;
+import net.minecraftforge.common.crafting.CraftingHelper;
+import net.minecraftforge.common.crafting.JsonContext;
+import net.minecraftforge.fml.common.FMLLog;
+import net.minecraftforge.fml.common.Loader;
+import net.minecraftforge.fml.common.ModContainer;
+
+import appeng.core.AppEng;
+import appeng.recipes.handlers.GrinderHandler;
+import appeng.recipes.handlers.InscriberHandler;
+import appeng.recipes.handlers.SmeltingHandler;
+
+
+public class AERecipeLoader
+{
+	private static final String AERECIPE_BASE = "/aerecipes";
+	private static Gson GSON = new GsonBuilder().setPrettyPrinting().disableHtmlEscaping().create();
+	private final Map<ResourceLocation, IAERecipeFactory> factories = new HashMap<>();
+
+	private final ModContainer mod;
+	private final JsonContext ctx;
+
+	public AERecipeLoader()
+	{
+		mod = Loader.instance().getIndexedModList().get( AppEng.MOD_ID );
+		ctx = new JsonContext( AppEng.MOD_ID );
+
+		initFactories();
+	}
+
+	public boolean loadProcessingRecipes()
+	{
+		return CraftingHelper.findFiles( this.mod, "assets/" + AppEng.MOD_ID + AERECIPE_BASE, this::preprocess, this::process, true, true );
+	}
+
+	private boolean preprocess( final Path root )
+	{
+		return true;
+	}
+
+	private boolean process( final Path root, final Path file )
+	{
+		String relative = root.relativize( file ).toString();
+		if( !"json".equals( FilenameUtils.getExtension( file.toString() ) ) || relative.startsWith( "_" ) )
+			return true;
+
+		String name = FilenameUtils.removeExtension( relative ).replaceAll( "\\\\", "/" );
+		ResourceLocation key = new ResourceLocation( this.ctx.getModId(), name );
+
+		BufferedReader reader = null;
+		try
+		{
+			reader = Files.newBufferedReader( file );
+			JsonObject json = JsonUtils.fromJson( GSON, reader, JsonObject.class );
+			if( json.has( "conditions" ) && !CraftingHelper.processConditions( JsonUtils.getJsonArray( json, "conditions" ), this.ctx ) )
+				return true;
+
+			register( json );
+		}
+		catch( JsonParseException e )
+		{
+			FMLLog.log.error( "Parsing error loading recipe {}", key, e );
+			return false;
+		}
+		catch( IOException e )
+		{
+			FMLLog.log.error( "Couldn't read recipe {} from {}", key, file, e );
+			return false;
+		}
+		finally
+		{
+			IOUtils.closeQuietly( reader );
+		}
+
+		return true;
+	}
+
+	private void register( JsonObject json )
+	{
+		if( json == null || json.isJsonNull() )
+			throw new JsonSyntaxException( "Json cannot be null" );
+
+		String type = this.ctx.appendModId( JsonUtils.getString( json, "type" ) );
+		if( type.isEmpty() )
+			throw new JsonSyntaxException( "Recipe type can not be an empty string" );
+
+		IAERecipeFactory factory = factories.get( new ResourceLocation( type ) );
+		if( factory == null )
+			throw new JsonSyntaxException( "Unknown recipe type: " + type );
+
+		factory.register( json, this.ctx );
+	}
+
+	private void initFactories()
+	{
+		this.factories.put( new ResourceLocation( AppEng.MOD_ID, "inscriber" ), new InscriberHandler() );
+		this.factories.put( new ResourceLocation( AppEng.MOD_ID, "smelt" ), new SmeltingHandler() );
+		this.factories.put( new ResourceLocation( AppEng.MOD_ID, "grinder" ), new GrinderHandler() );
+	}
+}