feat(api): Internal configuration

api/src/main/java/net/kyori/adventure/text/TextComponentImpl.java

@@ -29,6 +29,7 @@
 import java.util.stream.Stream;
 import net.kyori.adventure.text.format.Style;
 import net.kyori.adventure.util.Nag;
+import net.kyori.adventure.util.internal.AdventureProperties;
 import net.kyori.examination.ExaminableProperty;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -37,7 +38,7 @@
 import static java.util.Objects.requireNonNull;
 
 final class TextComponentImpl extends AbstractComponent implements TextComponent {
-  private static final boolean WARN_WHEN_LEGACY_FORMATTING_DETECTED = Boolean.getBoolean(String.join(".", "net", "kyori", "adventure", "text", "warnWhenLegacyFormattingDetected"));
+  private static final boolean WARN_WHEN_LEGACY_FORMATTING_DETECTED = Boolean.TRUE.equals(AdventureProperties.TEXT_WARN_WHEN_LEGACY_FORMATTING_DETECTED.value());
   @VisibleForTesting
   static final char SECTION_CHAR = '§';
 

api/src/main/java/net/kyori/adventure/translation/TranslationLocales.java

@@ -25,12 +25,14 @@
 
 import java.util.Locale;
 import java.util.function.Supplier;
+import net.kyori.adventure.util.internal.AdventureProperties;
+import org.jetbrains.annotations.Nullable;
 
 final class TranslationLocales {
   private static final Supplier<Locale> GLOBAL;
 
   static {
-    final String property = System.getProperty("net.kyo".concat("ri.adventure.defaultTranslationLocale"));
+    final @Nullable String property = AdventureProperties.DEFAULT_TRANSLATION_LOCALE.value();
     if (property == null || property.isEmpty()) {
       GLOBAL = () -> Locale.US;
     } else if (property.equals("system")) {

api/src/main/java/net/kyori/adventure/util/Services.java

@@ -26,6 +26,7 @@
 import java.util.Iterator;
 import java.util.Optional;
 import java.util.ServiceLoader;
+import net.kyori.adventure.util.internal.AdventureProperties;
 import org.jetbrains.annotations.NotNull;
 
 /**
@@ -34,8 +35,7 @@
  * @since 4.8.0
  */
 public final class Services {
-  // net.kyori.adventure.serviceLoadFailuresAreFatal
-  private static final boolean SERVICE_LOAD_FAILURES_ARE_FATAL = Boolean.parseBoolean(System.getProperty(String.join(".", "net", "kyori", "adventure", "serviceLoadFailuresAreFatal"), String.valueOf(true)));
+  private static final boolean SERVICE_LOAD_FAILURES_ARE_FATAL = Boolean.TRUE.equals(AdventureProperties.SERVICE_LOAD_FAILURES_ARE_FATAL.value());
 
   private Services() {
   }

api/src/main/java/net/kyori/adventure/util/internal/AdventureProperties.java

@@ -0,0 +1,91 @@
+/*
+ * This file is part of adventure, licensed under the MIT License.
+ *
+ * Copyright (c) 2017-2021 KyoriPowered
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package net.kyori.adventure.util.internal;
+
+import java.util.function.Function;
+import org.jetbrains.annotations.ApiStatus;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+/**
+ * Adventure properties.
+ *
+ * @since 4.10.0
+ */
+@ApiStatus.Internal
+public final class AdventureProperties {
+  /**
+   * Property for specifying the default translation locale.
+   *
+   * @since 4.10.0
+   */
+  public static final Property<String> DEFAULT_TRANSLATION_LOCALE = option("defaultTranslationLocale", Function.identity(), null);
+  /**
+   * Property for specifying whether service load failures are fatal.
+   *
+   * @since 4.10.0
+   */
+  public static final Property<Boolean> SERVICE_LOAD_FAILURES_ARE_FATAL = option("serviceLoadFailuresAreFatal", Boolean::parseBoolean, Boolean.TRUE);
+  /**
+   * Property for specifying whether to warn when legacy formatting is detected.
+   *
+   * @since 4.10.0
+   */
+  public static final Property<Boolean> TEXT_WARN_WHEN_LEGACY_FORMATTING_DETECTED = option("text.warnWhenLegacyFormattingDetected", Boolean::parseBoolean, Boolean.FALSE);
+
+  private AdventureProperties() {
+  }
+
+  /**
+   * Creates a new property.
+   *
+   * @param name the property name
+   * @param parser the value parser
+   * @param defaultValue the default value
+   * @param <T> the value type
+   * @return a property
+   * @since 4.10.0
+   */
+  public static <T> @NotNull Property<T> option(final @NotNull String name, final @NotNull Function<String, T> parser, final @Nullable T defaultValue) {
+    return new AdventurePropertiesImpl.PropertyImpl<>(name, parser, defaultValue);
+  }
+
+  /**
+   * A property.
+   *
+   * @param <T> the value type
+   * @since 4.10.0
+   */
+  @ApiStatus.Internal
+  @ApiStatus.NonExtendable
+  public interface Property<T> {
+    /**
+     * Gets the value.
+     *
+     * @return the value
+     * @since 4.10.0
+     */
+    @Nullable T value();
+  }
+}

api/src/main/java/net/kyori/adventure/util/internal/AdventurePropertiesImpl.java

@@ -0,0 +1,87 @@
+/*
+ * This file is part of adventure, licensed under the MIT License.
+ *
+ * Copyright (c) 2017-2021 KyoriPowered
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+package net.kyori.adventure.util.internal;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.util.Properties;
+import java.util.function.Function;
+import org.jetbrains.annotations.NotNull;
+import org.jetbrains.annotations.Nullable;
+
+final class AdventurePropertiesImpl {
+  private static final String FILESYSTEM_DIRECTORY_NAME = "config";
+  private static final String FILESYSTEM_FILE_NAME = "adventure.properties";
+  private static final Properties PROPERTIES = new Properties();
+
+  static {
+    final Path path = Paths.get(FILESYSTEM_DIRECTORY_NAME, FILESYSTEM_FILE_NAME);
+    if (Files.isRegularFile(path)) {
+      try (final InputStream is = Files.newInputStream(path)) {
+        PROPERTIES.load(is);
+      } catch (final IOException e) {
+        // Well, that's awkward.
+        e.printStackTrace();
+      }
+    }
+  }
+
+  private AdventurePropertiesImpl() {
+  }
+
+  static final class PropertyImpl<T> implements AdventureProperties.Property<T> {
+    private final String name;
+    private final Function<String, T> parser;
+    private final @Nullable T defaultValue;
+
+    PropertyImpl(final @NotNull String name, final @NotNull Function<String, T> parser, final @Nullable T defaultValue) {
+      this.name = name;
+      this.parser = parser;
+      this.defaultValue = defaultValue;
+    }
+
+    @Override
+    public @Nullable T value() {
+      final String property = String.join(".", "net", "kyori", "adventure", this.name);
+      final String value = System.getProperty(property, PROPERTIES.getProperty(this.name));
+      if (value != null) {
+        return this.parser.apply(value);
+      }
+      return this.defaultValue;
+    }
+
+    @Override
+    public boolean equals(final @Nullable Object that) {
+      return this == that;
+    }
+
+    @Override
+    public int hashCode() {
+      return this.name.hashCode();
+    }
+  }
+}

api/src/main/java/net/kyori/adventure/util/internal/package-info.java

@@ -0,0 +1,28 @@
+/*
+ * This file is part of adventure, licensed under the MIT License.
+ *
+ * Copyright (c) 2017-2021 KyoriPowered
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to deal
+ * in the Software without restriction, including without limitation the rights
+ * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+ * copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+/**
+ * Internal utilities.
+ */
+@org.jetbrains.annotations.ApiStatus.Internal
+package net.kyori.adventure.util.internal;