Add more missing function to ModList, FMLModContainer and ModContainer (#87)

FMLModContainer and ModContainer:
 [API] Add getMod and acceptEvent methods
 [Internal] setParent and getParent: associated Fabric ModContainer
getter and setters

ModList:
 Add most helper functions present in Forge's ModList, these are
frequenty used by mods

ModLoader(class):
 A class may used by mods to post event on the FML event bus

Author: rikka0w0

patchwork-dispatcher/src/main/java/net/patchworkmc/impl/Patchwork.java

@@ -32,6 +32,7 @@
 import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.DistExecutor;
 import net.minecraftforge.fml.ModContainer;
+import net.minecraftforge.fml.ModList;
 import net.minecraftforge.fml.ModLoadingContext;
 import net.minecraftforge.fml.event.lifecycle.FMLClientSetupEvent;
 import net.minecraftforge.fml.event.lifecycle.FMLCommonSetupEvent;
@@ -114,6 +115,7 @@ public void onInitialize() {
 			throw error;
 		}
 
+		ModList.get().setLoadedMods(mods.values());
 		// Send initialization events
 
 		RegistryEventDispatcher.dispatchRegistryEvents(event -> dispatch(mods, event));

patchwork-fml/src/main/java/net/minecraftforge/fml/ModContainer.java

@@ -21,13 +21,15 @@
 
 import java.util.EnumMap;
 
+import net.minecraftforge.eventbus.api.Event;
 import net.minecraftforge.fml.config.ModConfig;
 
 // TODO: Stub
-public class ModContainer {
+public abstract class ModContainer {
 	protected final String modId;
 	protected final String namespace;
 	protected final EnumMap<ModConfig.Type, ModConfig> configs;
+	private net.fabricmc.loader.api.ModContainer fabricModContainer;
 
 	public ModContainer(String modId) {
 		this.modId = modId;
@@ -47,4 +49,17 @@ public final String getNamespace() {
 	public void addConfig(final ModConfig modConfig) {
 		configs.put(modConfig.getType(), modConfig);
 	}
+
+	public final void setParent(net.fabricmc.loader.api.ModContainer fabricModContainer) {
+		this.fabricModContainer = fabricModContainer;
+	}
+
+	public final net.fabricmc.loader.api.ModContainer getParent() {
+		return this.fabricModContainer;
+	}
+
+	public abstract Object getMod();
+
+	protected void acceptEvent(Event e) {
+	}
 }

patchwork-fml/src/main/java/net/minecraftforge/fml/ModList.java

@@ -19,16 +19,25 @@
 
 package net.minecraftforge.fml;
 
+import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
+import java.util.Optional;
+import java.util.function.BiConsumer;
+import java.util.function.Consumer;
+import java.util.function.Function;
 import java.util.stream.Collectors;
+import java.util.stream.Stream;
 
+import net.minecraftforge.fml.javafmlmod.FMLModContainer;
+import net.minecraftforge.fml.loading.moddiscovery.ModFile;
 import net.minecraftforge.fml.loading.moddiscovery.ModFileInfo;
 import net.minecraftforge.forgespi.language.ModFileScanData;
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
+import com.google.common.collect.ImmutableList;
 
 import net.fabricmc.loader.api.FabricLoader;
 import net.fabricmc.loader.api.ModContainer;
@@ -42,6 +51,7 @@ public class ModList {
 	private static ModList INSTANCE = new ModList();
 
 	private Map<ModContainer, ModFileInfo> modFileInfoMap = new HashMap<>();
+	private Map<ModContainer, net.minecraftforge.fml.ModContainer> fabricForgeModMap = new HashMap<>();
 	private List<ModFileScanData> allScanDataCache;
 
 	public static ModList get() {
@@ -53,6 +63,10 @@ public boolean isLoaded(String modId) {
 		return FabricLoader.getInstance().isModLoaded(modId);
 	}
 
+	public List<ModFileInfo> getModFiles() {
+		return ImmutableList.copyOf(modFileInfoMap.values());
+	}
+
 	public ModFileInfo getModFileById(String modId) {
 		ModContainer modContainer = FabricLoader.getInstance().getModContainer(modId).orElse(null);
 
@@ -63,6 +77,39 @@ public ModFileInfo getModFileById(String modId) {
 		return getModFileByContainer(modContainer);
 	}
 
+	public void setLoadedMods(final Collection<FMLModContainer> collection) {
+		fabricForgeModMap.clear();
+
+		for (net.minecraftforge.fml.ModContainer fmlContainer: collection) {
+			String modId = fmlContainer.modId;
+			ModContainer fabricModContainer = FabricLoader.getInstance().getModContainer(modId).orElse(null);
+
+			if (fabricModContainer != null) {
+				fmlContainer.setParent(fabricModContainer);
+				fabricForgeModMap.put(fabricModContainer, fmlContainer);
+			} else {
+				throw new RuntimeException("Cannot find the Fabric ModContainer for Forge mod: " + modId);
+			}
+		}
+	}
+
+	public net.minecraftforge.fml.ModContainer getModContainer(ModContainer fabricModContainer) {
+		return fabricForgeModMap.get(fabricModContainer);
+	}
+
+	@SuppressWarnings("unchecked")
+	public <T> Optional<T> getModObjectById(String modId) {
+		return getModContainerById(modId).map(net.minecraftforge.fml.ModContainer::getMod).map(o -> (T) o);
+	}
+
+	public Optional<? extends net.minecraftforge.fml.ModContainer> getModContainerById(String modId) {
+		return Optional.ofNullable(this.fabricForgeModMap.get(modId));
+	}
+
+	public Optional<? extends net.minecraftforge.fml.ModContainer> getModContainerByObject(Object obj) {
+		return this.fabricForgeModMap.values().stream().filter(mc -> mc.getMod() == obj).findFirst();
+	}
+
 	private ModFileInfo getModFileByContainer(ModContainer modContainer) {
 		return modFileInfoMap.computeIfAbsent(modContainer, this::createModFileInfo);
 	}
@@ -107,6 +154,10 @@ private ModFileInfo createModFileInfo(ModContainer modContainer) {
 		return new ModFileInfo();
 	}
 
+	public int size() {
+		return modFileInfoMap.size();
+	}
+
 	public List<ModFileScanData> getAllScanData() {
 		if (allScanDataCache == null) {
 			// Even though ModFileScanData lacks an implementation of Object#equals, the default implementation tests
@@ -124,4 +175,20 @@ public List<ModFileScanData> getAllScanData() {
 
 		return allScanDataCache;
 	}
+
+	public void forEachModFile(Consumer<ModFile> fileConsumer) {
+		modFileInfoMap.values().stream().map(ModFileInfo::getFile).forEach(fileConsumer);
+	}
+
+	public <T> Stream<T> applyForEachModFile(Function<ModFile, T> function) {
+		return modFileInfoMap.values().stream().map(ModFileInfo::getFile).map(function);
+	}
+
+	public void forEachModContainer(BiConsumer<String, net.minecraftforge.fml.ModContainer> modContainerConsumer) {
+		fabricForgeModMap.forEach((fabric, fml) -> modContainerConsumer.accept(fabric.getMetadata().getId(), fml));
+	}
+
+	public <T> Stream<T> applyForEachModContainer(Function<net.minecraftforge.fml.ModContainer, T> function) {
+		return fabricForgeModMap.values().stream().map(function);
+	}
 }

patchwork-fml/src/main/java/net/minecraftforge/fml/ModLoader.java

@@ -0,0 +1,38 @@
+/*
+ * Minecraft Forge, Patchwork Project
+ * Copyright (c) 2016-2020, 2019-2020
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation version 2.1
+ * of the License.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+package net.minecraftforge.fml;
+
+import net.minecraftforge.eventbus.api.Event;
+
+public class ModLoader {
+	private static ModLoader INSTANCE;
+
+	private ModLoader() {
+		INSTANCE = this;
+	}
+
+	public static ModLoader get() {
+		return INSTANCE == null ? INSTANCE = new ModLoader() : INSTANCE;
+	}
+
+	public void postEvent(Event e) {
+		ModList.get().forEachModContainer((id, mc) -> mc.acceptEvent(e));
+	}
+}

patchwork-fml/src/main/java/net/minecraftforge/fml/javafmlmod/FMLModContainer.java

@@ -27,6 +27,7 @@
 
 public class FMLModContainer extends ModContainer {
 	private final IEventBus eventBus;
+	private Object instance;
 
 	public FMLModContainer(String id) {
 		super(id);
@@ -47,4 +48,18 @@ public IEventBus getEventBus() {
 	private void onEventFailed(IEventBus iEventBus, Event event, IEventListener[] listeners, int i, Throwable throwable) {
 		// TODO
 	}
+
+	@Override
+	protected void acceptEvent(final Event e) {
+		this.eventBus.post(e);
+	}
+
+	@Override
+	public Object getMod() {
+		return this.instance;
+	}
+
+	public void setMod(Object instance) {
+		this.instance = instance;
+	}
 }