プラグインのMVPとなる機能の実装

.devcontainer/Dockerfile

@@ -1 +1,10 @@
 FROM mcr.microsoft.com/devcontainers/java:21
+
+RUN apt-get update && apt-get install -y \
+    maven \
+    && apt-get clean \
+    && rm -rf /var/lib/apt/lists/*
+
+# .m2ディレクトリの権限を vscode に設定
+RUN mkdir -p /home/vscode/.m2/repository \
+    && chown -R vscode /home/vscode/.m2

.devcontainer/devcontainer.json

@@ -11,5 +11,5 @@
             ]
         }
     },
-    "postCreateCommand": "mvn dependency:go-offline"
+    "shutdownAction": "none"
 }

.gitignore

@@ -1,2 +1,3 @@
 # Maven
 target/
+dependency-reduced-pom.xml

Makefile

@@ -1,6 +1,6 @@
 # Minecraft LogTime Plugin - 開発用Makefile
 
-.PHONY: help build start stop clean logs test reload
+.PHONY: help build start stop clean logs test reload dev-rebuild dev-logs
 
 # デフォルトターゲット
 help:
@@ -12,6 +12,8 @@ help:
 	@echo "  make logs    - Paper サーバーのログを表示"
 	@echo "  make test    - テストを実行"
 	@echo "  make reload  - プラグインをリビルドしてサーバー再起動"
+	@echo "  make dev-rebuild - 開発用コマンド: プラグインをリビルドしてサーバー再起動"
+	@echo "  make dev-logs  - 開発用コマンド: Paper サーバーのログを表示"
 
 # プラグインをビルド
 build:
@@ -55,3 +57,13 @@ init:
 	docker-compose build
 	make build
 	@echo "初期化完了！'make start' でサーバーを起動できます。"
+
+# 開発用コマンド
+dev-rebuild:
+	docker-compose build paper
+	docker-compose restart paper
+	@echo "Plugin reloaded!"
+
+# 開発用コマンド
+dev-logs:
+	docker-compose logs -f paper

docker-compose.yml

@@ -12,14 +12,12 @@ services:
     build:
       context: .
       dockerfile: ./paper/Dockerfile
-    container_name: mc-plugin-paper
+      target: runtime
     ports:
       - "25565:25565"
     volumes:
-      - ./target:/server/plugins
       - paper_data:/server
-    depends_on:
-      - dev
+      - ./target:/server/plugins
 
 volumes:
   paper_data:

paper/Dockerfile

@@ -1,20 +1,17 @@
-# === ビルド用ステージ ===
-FROM debian:stable-slim AS builder
-
-ARG MC_VERSION="1.21"
-ARG BUILD_NUMBER="130"
-
+# === Paperサーバーダウンロード用ステージ ===
+FROM debian:stable-slim AS server-builder
+ARG MC_VERSION="1.21.8"
+ARG BUILD_NUMBER="53"
 RUN apt-get update && apt-get install -y wget && rm -rf /var/lib/apt/lists/*
 RUN wget -O paper.jar "https://api.papermc.io/v2/projects/paper/versions/${MC_VERSION}/builds/${BUILD_NUMBER}/downloads/paper-${MC_VERSION}-${BUILD_NUMBER}.jar"
 
-# === 起動用ステージ ===
-FROM eclipse-temurin:21-jre-jammy
-
+# === 実行用ステージ ===
+FROM eclipse-temurin:21-jre-jammy AS runtime
 WORKDIR /server
 
-COPY --from=builder /paper.jar .
+# Paperサーバーをコピー
+COPY --from=server-builder /paper.jar .
 COPY paper/eula.txt .
 
 EXPOSE 25565
-
 CMD ["java", "-Xms1G", "-Xmx1G", "-jar", "paper.jar", "--nogui"]

pom.xml

@@ -79,6 +79,43 @@
                     </execution>
                 </executions>
             </plugin>
+
+            <plugin>
+                <groupId>org.apache.maven.plugins</groupId>
+                <artifactId>maven-shade-plugin</artifactId>
+                <version>3.4.1</version>
+                <executions>
+                    <execution>
+                        <phase>package</phase>
+                        <goals>
+                            <goal>shade</goal>
+                        </goals>
+                        <configuration>
+                            <artifactSet>
+                                <includes>
+                                    <include>org.jetbrains.kotlin:kotlin-stdlib</include>
+                                </includes>
+                            </artifactSet>
+                            <transformers>
+                                <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
+                                    <mainClass>com.pool25m.logtime.LogTimePlugin</mainClass>
+                                </transformer>
+                            </transformers>
+                            <finalName>${project.artifactId}-${project.version}</finalName>
+                            <filters>
+                                <filter>
+                                    <artifact>*:*</artifact>
+                                    <excludes>
+                                        <exclude>META-INF/*.SF</exclude>
+                                        <exclude>META-INF/*.DSA</exclude>
+                                        <exclude>META-INF/*.RSA</exclude>
+                                    </excludes>
+                                </filter>
+                            </filters>
+                        </configuration>
+                    </execution>
+                </executions>
+            </plugin>
         </plugins>
     </build>
 </project>

src/main/kotlin/com/pool25m/logtime/LogTimePlugin.kt

@@ -4,9 +4,10 @@ import org.bukkit.plugin.java.JavaPlugin
 
 class LogTimePlugin : JavaPlugin() {
     override fun onEnable() {
-        logger.info("LogTime Plugin has been enabled!")
+        val playerStatsService = PlayerStatsService()
+        getCommand("ranking")?.setExecutor(RankingCommand(playerStatsService))
 
-        getCommand("ranking")?.setExecutor(RankingCommand())
+        logger.info("LogTime Plugin has been enabled!")
     }
 
     override fun onDisable() {

src/main/kotlin/com/pool25m/logtime/PlayerStatsService.kt

@@ -0,0 +1,44 @@
+package com.pool25m.logtime
+
+import org.bukkit.Bukkit
+import org.bukkit.Statistic
+import java.util.concurrent.TimeUnit
+
+data class PlayerRankData(
+    val playerName: String,
+    val playTicks: Long,
+    val formattedPlayTime: String,
+)
+
+class PlayerStatsService {
+    /**
+     * サーバーにログインしたことのある全プレイヤーの総プレイ時間ランキングを取得する
+     */
+    fun getPlayerRankings(): List<PlayerRankData> {
+        return Bukkit
+            .getOfflinePlayers()
+            .map { player ->
+                val playTicks = player.getStatistic(Statistic.PLAY_ONE_MINUTE).toLong()
+
+                PlayerRankData(
+                    // OfflinePlayer の場合は name が null になる可能性がある
+                    playerName = player.name ?: "Unknown Player",
+                    playTicks = playTicks,
+                    formattedPlayTime = formatPlayTimeFromTicks(playTicks),
+                )
+            }.sortedByDescending { it.playTicks } // 正確な時間でソート
+    }
+
+    private fun formatPlayTimeFromTicks(ticks: Long): String {
+        val millis = ticks * 50 // 1 tick = 50ms
+        val hours = TimeUnit.MILLISECONDS.toHours(millis)
+        val minutes = TimeUnit.MILLISECONDS.toMinutes(millis) % 60
+        val seconds = TimeUnit.MILLISECONDS.toSeconds(millis) % 60
+
+        return buildString {
+            if (hours > 0) append("${hours}h ")
+            if (minutes > 0) append("${minutes}m ")
+            append("${seconds}s")
+        }.ifEmpty { "0s" }
+    }
+}

src/main/kotlin/com/pool25m/logtime/RankingCommand.kt

@@ -4,14 +4,27 @@ import org.bukkit.command.Command
 import org.bukkit.command.CommandExecutor
 import org.bukkit.command.CommandSender
 
-class RankingCommand : CommandExecutor {
+class RankingCommand(
+    private val playerStatsService: PlayerStatsService,
+) : CommandExecutor {
     override fun onCommand(
         sender: CommandSender,
         command: Command,
         label: String,
         args: Array<out String>,
     ): Boolean {
-        sender.sendMessage("LogTime plugin is working!")
+        val rankedList = playerStatsService.getPlayerRankings()
+
+        if (rankedList.isEmpty()) {
+            sender.sendMessage("No players found.")
+            return true
+        }
+
+        sender.sendMessage("--- 総プレイ時間ランキング ---")
+        rankedList.forEachIndexed { index, rankData ->
+            val rank = index + 1
+            sender.sendMessage("$rank. ${rankData.playerName} - ${rankData.formattedPlayTime}")
+        }
 
         return true
     }