Load modded translations on the server (#2668)

* Load modded translations on the server

* Don't load built-in mods

fabric-resource-loader-v0/src/main/java/net/fabricmc/fabric/mixin/resource/loader/LanguageMixin.java

@@ -0,0 +1,77 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.mixin.resource.loader;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.BiConsumer;
+
+import com.google.common.collect.ImmutableMap;
+import com.google.gson.JsonParseException;
+import org.slf4j.Logger;
+import org.spongepowered.asm.mixin.Final;
+import org.spongepowered.asm.mixin.Mixin;
+import org.spongepowered.asm.mixin.Shadow;
+import org.spongepowered.asm.mixin.injection.At;
+import org.spongepowered.asm.mixin.injection.Redirect;
+
+import net.minecraft.util.Language;
+
+import net.fabricmc.loader.api.FabricLoader;
+import net.fabricmc.loader.api.ModContainer;
+
+@Mixin(Language.class)
+class LanguageMixin {
+	@Shadow
+	@Final
+	private static Logger LOGGER;
+
+	@Shadow
+	@Final
+	public static String DEFAULT_LANGUAGE;
+
+	@Redirect(method = "create", at = @At(value = "INVOKE", target = "Lcom/google/common/collect/ImmutableMap$Builder;build()Lcom/google/common/collect/ImmutableMap;"))
+	private static ImmutableMap<String, String> create(ImmutableMap.Builder<String, String> cir) {
+		Map<String, String> map = new HashMap<>(cir.buildOrThrow());
+
+		for (ModContainer mod : FabricLoader.getInstance().getAllMods()) {
+			if (!mod.getMetadata().getType().equals("builtin")) loadModLanguage(mod, map::put);
+		}
+
+		return ImmutableMap.copyOf(map);
+	}
+
+	private static void loadModLanguage(ModContainer container, BiConsumer<String, String> entryConsumer) {
+		Path path = container.findPath("/assets/" + container.getMetadata().getId() + "/lang/" + DEFAULT_LANGUAGE + ".json").orElse(null);
+		if (path == null || !Files.isRegularFile(path)) return;
+
+		try (InputStream stream = Files.newInputStream(path)) {
+			LOGGER.debug("Loading translations from {}", path);
+			load(stream, entryConsumer);
+		} catch (JsonParseException | IOException e) {
+			LOGGER.error("Couldn't read strings from {}", path, e);
+		}
+	}
+
+	@Shadow
+	public static void load(InputStream inputStream, BiConsumer<String, String> entryConsumer) {
+	}
+}

fabric-resource-loader-v0/src/main/resources/fabric-resource-loader-v0.mixins.json

@@ -6,6 +6,7 @@
     "DefaultResourcePackMixin",
     "FileResourcePackProviderAccessor",
     "KeyedResourceReloadListenerMixin",
+    "LanguageMixin",
     "LifecycledResourceManagerImplMixin",
     "MainMixin",
     "MinecraftServerMixin",

fabric-resource-loader-v0/src/testmod/java/net/fabricmc/fabric/test/resource/loader/LanguageTestMod.java

@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2016, 2017, 2018, 2019 FabricMC
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package net.fabricmc.fabric.test.resource.loader;
+
+import net.minecraft.text.Text;
+
+import net.fabricmc.api.ModInitializer;
+
+public class LanguageTestMod implements ModInitializer {
+	@Override
+	public void onInitialize() {
+		testTranslationLoaded();
+	}
+
+	private static void testTranslationLoaded() {
+		String expected = "Fabric mod";
+		String actual = Text.translatable("pack.source.fabricmod").getString();
+
+		if (!expected.equals(actual)) {
+			throw new AssertionError("Expected 'pack.source.fabricmod' to translate to " + expected + ", but translated to " + actual);
+		}
+	}
+}

fabric-resource-loader-v0/src/testmod/resources/fabric.mod.json

@@ -11,6 +11,7 @@
   "entrypoints": {
     "main": [
       "net.fabricmc.fabric.test.resource.loader.BuiltinResourcePackTestMod",
+      "net.fabricmc.fabric.test.resource.loader.LanguageTestMod",
       "net.fabricmc.fabric.test.resource.loader.ResourceReloadListenerTestMod"
     ]
   }