Add Nukkit metrics implementation

gradle.properties

@@ -1 +1 @@
-version=0.7.5
+version=0.8.0

nukkit/build.gradle.kts

@@ -0,0 +1,11 @@
+val moduleName by extra("dev.faststats.nukkit")
+
+repositories {
+    maven("https://repo.opencollab.dev/maven-releases")
+    maven("https://repo.opencollab.dev/maven-snapshots")
+}
+
+dependencies {
+    api(project(":core"))
+    compileOnly("cn.nukkit:nukkit:1.0-SNAPSHOT")
+}

nukkit/src/main/java/dev/faststats/nukkit/NukkitMetrics.java

@@ -0,0 +1,23 @@
+package dev.faststats.nukkit;
+
+import cn.nukkit.plugin.PluginBase;
+import dev.faststats.core.Metrics;
+import org.jetbrains.annotations.Contract;
+
+/**
+ * Nukkit metrics implementation.
+ *
+ * @since 0.8.0
+ */
+public sealed interface NukkitMetrics extends Metrics permits NukkitMetricsImpl {
+    /**
+     * Creates a new metrics factory for Nukkit.
+     *
+     * @return the metrics factory
+     * @since 0.8.0
+     */
+    @Contract(pure = true)
+    static Metrics.Factory<PluginBase> factory() {
+        return new NukkitMetricsImpl.Factory();
+    }
+}

nukkit/src/main/java/dev/faststats/nukkit/NukkitMetricsImpl.java

@@ -0,0 +1,74 @@
+package dev.faststats.nukkit;
+
+import cn.nukkit.Server;
+import cn.nukkit.plugin.PluginBase;
+import cn.nukkit.utils.Logger;
+import com.google.gson.JsonObject;
+import dev.faststats.core.Metrics;
+import dev.faststats.core.SimpleMetrics;
+import org.jetbrains.annotations.Async;
+import org.jetbrains.annotations.Contract;
+import org.jspecify.annotations.Nullable;
+
+import java.nio.file.Path;
+import java.util.Optional;
+import java.util.function.Supplier;
+
+final class NukkitMetricsImpl extends SimpleMetrics implements NukkitMetrics {
+    private final Logger logger;
+    private final Server server;
+    private final PluginBase plugin;
+
+    @Async.Schedule
+    @Contract(mutates = "io")
+    private NukkitMetricsImpl(SimpleMetrics.Factory<?> factory, PluginBase plugin, Path config) throws IllegalStateException {
+        super(factory, config);
+
+        this.logger = plugin.getLogger();
+        this.server = plugin.getServer();
+        this.plugin = plugin;
+
+        startSubmitting();
+    }
+
+    @Override
+    protected void appendDefaultData(JsonObject charts) {
+        charts.addProperty("minecraft_version", server.getVersion());
+        charts.addProperty("online_mode", server.xboxAuth);
+        charts.addProperty("player_count", server.getOnlinePlayers().size());
+        charts.addProperty("plugin_version", plugin.getDescription().getVersion());
+        charts.addProperty("server_type", server.getName());
+    }
+
+    @Override
+    protected void printError(String message, @Nullable Throwable throwable) {
+        logger.error(message, throwable);
+    }
+
+    @Override
+    protected void printInfo(String message) {
+        logger.info(message);
+    }
+
+    @Override
+    protected void printWarning(String message) {
+        logger.warning(message);
+    }
+
+    private <T> Optional<T> tryOrEmpty(Supplier<T> supplier) {
+        try {
+            return Optional.of(supplier.get());
+        } catch (NoSuchMethodError | Exception e) {
+            return Optional.empty();
+        }
+    }
+
+    static final class Factory extends SimpleMetrics.Factory<PluginBase> {
+        @Override
+        public Metrics create(PluginBase plugin) throws IllegalStateException {
+            var dataFolder = Path.of(plugin.getServer().getPluginPath(), "faststats");
+            var config = dataFolder.resolve("config.properties");
+            return new NukkitMetricsImpl(this, plugin, config);
+        }
+    }
+}

nukkit/src/main/java/module-info.java

@@ -0,0 +1,12 @@
+import org.jspecify.annotations.NullMarked;
+
+@NullMarked
+module dev.faststats.nukkit {
+    exports dev.faststats.nukkit;
+
+    requires com.google.gson;
+    requires dev.faststats.core;
+
+    requires static org.jetbrains.annotations;
+    requires static org.jspecify;
+}

settings.gradle.kts

@@ -7,4 +7,5 @@ include("bukkit")
 include("bungeecord")
 include("core")
 include("minestom")
+include("nukkit")
 include("velocity")