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From 0000000000000000000000000000000000000000 Mon Sep 17 00:00:00 2001
From: Kyle Wood <demonwav@gmail.com>
Date: Thu, 1 Mar 2018 19:37:52 -0600
Subject: [PATCH] Add version history to version command
diff --git a/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java b/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
index c8b911e5d013525ffc5d2911ee0e421dd916cb00..dc0ea65ab87255fad0d54dfb509300098a0b4864 100644
--- a/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
+++ b/src/main/java/com/destroystokyo/paper/PaperVersionFetcher.java
@@ -5,7 +5,9 @@ import com.google.common.base.Charsets;
import com.google.common.io.Resources;
import com.google.gson.*;
import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.TextComponent;
import net.kyori.adventure.text.format.NamedTextColor;
+import net.kyori.adventure.text.format.TextDecoration;
import javax.annotation.Nonnull;
import javax.annotation.Nullable;
@@ -27,7 +29,10 @@ public class PaperVersionFetcher implements VersionFetcher {
@Override
public Component getVersionMessage(@Nonnull String serverVersion) {
String[] parts = serverVersion.substring("git-Paper-".length()).split("[-\\s]");
- return getUpdateStatusMessage("PaperMC/Paper", GITHUB_BRANCH_NAME, parts[0]);
+ final Component updateMessage = getUpdateStatusMessage("PaperMC/Paper", GITHUB_BRANCH_NAME, parts[0]);
+ final Component history = getHistory();
+
+ return history != null ? TextComponent.ofChildren(updateMessage, Component.newline(), history) : updateMessage;
}
private static @Nullable String getMinecraftVersion() {
@@ -114,4 +119,19 @@ public class PaperVersionFetcher implements VersionFetcher {
return -1;
}
}
+
+ @Nullable
+ private Component getHistory() {
+ final VersionHistoryManager.VersionData data = VersionHistoryManager.INSTANCE.getVersionData();
+ if (data == null) {
+ return null;
+ }
+
+ final String oldVersion = data.getOldVersion();
+ if (oldVersion == null) {
+ return null;
+ }
+
+ return Component.text("Previous version: " + oldVersion, NamedTextColor.GRAY, TextDecoration.ITALIC);
+ }
}
diff --git a/src/main/java/com/destroystokyo/paper/VersionHistoryManager.java b/src/main/java/com/destroystokyo/paper/VersionHistoryManager.java
new file mode 100644
index 0000000000000000000000000000000000000000..aac3f66cb23d260729c2a48d8710a9de2346aa22
--- /dev/null
+++ b/src/main/java/com/destroystokyo/paper/VersionHistoryManager.java
@@ -0,0 +1,145 @@
+package com.destroystokyo.paper;
+
+import com.google.common.base.MoreObjects;
+import com.google.gson.Gson;
+import com.google.gson.JsonSyntaxException;
+import java.io.BufferedReader;
+import java.io.BufferedWriter;
+import java.io.IOException;
+import java.nio.charset.StandardCharsets;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+import java.nio.file.StandardOpenOption;
+import java.util.Objects;
+import java.util.logging.Level;
+import java.util.logging.Logger;
+import org.bukkit.Bukkit;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+
+public enum VersionHistoryManager {
+ INSTANCE;
+
+ private final Gson gson = new Gson();
+
+ private final Logger logger = Bukkit.getLogger();
+
+ private VersionData currentData = null;
+
+ VersionHistoryManager() {
+ final Path path = Paths.get("version_history.json");
+
+ if (Files.exists(path)) {
+ // Basic file santiy checks
+ if (!Files.isRegularFile(path)) {
+ if (Files.isDirectory(path)) {
+ logger.severe(path + " is a directory, cannot be used for version history");
+ } else {
+ logger.severe(path + " is not a regular file, cannot be used for version history");
+ }
+ // We can't continue
+ return;
+ }
+
+ try (final BufferedReader reader = Files.newBufferedReader(path, StandardCharsets.UTF_8)) {
+ currentData = gson.fromJson(reader, VersionData.class);
+ } catch (final IOException e) {
+ logger.log(Level.SEVERE, "Failed to read version history file '" + path + "'", e);
+ return;
+ } catch (final JsonSyntaxException e) {
+ logger.log(Level.SEVERE, "Invalid json syntax for file '" + path + "'", e);
+ return;
+ }
+
+ final String version = Bukkit.getVersion();
+ if (version == null) {
+ logger.severe("Failed to retrieve current version");
+ return;
+ }
+
+ if (!version.equals(currentData.getCurrentVersion())) {
+ // The version appears to have changed
+ currentData.setOldVersion(currentData.getCurrentVersion());
+ currentData.setCurrentVersion(version);
+ writeFile(path);
+ }
+ } else {
+ // File doesn't exist, start fresh
+ currentData = new VersionData();
+ // oldVersion is null
+ currentData.setCurrentVersion(Bukkit.getVersion());
+ writeFile(path);
+ }
+ }
+
+ private void writeFile(@Nonnull final Path path) {
+ try (final BufferedWriter writer = Files.newBufferedWriter(
+ path,
+ StandardCharsets.UTF_8,
+ StandardOpenOption.WRITE,
+ StandardOpenOption.CREATE,
+ StandardOpenOption.TRUNCATE_EXISTING
+ )) {
+ gson.toJson(currentData, writer);
+ } catch (final IOException e) {
+ logger.log(Level.SEVERE, "Failed to write to version history file", e);
+ }
+ }
+
+ @Nullable
+ public VersionData getVersionData() {
+ return currentData;
+ }
+
+ public static class VersionData {
+ private String oldVersion;
+
+ private String currentVersion;
+
+ @Nullable
+ public String getOldVersion() {
+ return oldVersion;
+ }
+
+ public void setOldVersion(@Nullable String oldVersion) {
+ this.oldVersion = oldVersion;
+ }
+
+ @Nullable
+ public String getCurrentVersion() {
+ return currentVersion;
+ }
+
+ public void setCurrentVersion(@Nullable String currentVersion) {
+ this.currentVersion = currentVersion;
+ }
+
+ @Override
+ public String toString() {
+ return MoreObjects.toStringHelper(this)
+ .add("oldVersion", oldVersion)
+ .add("currentVersion", currentVersion)
+ .toString();
+ }
+
+ @Override
+ public boolean equals(@Nullable Object o) {
+ if (this == o) {
+ return true;
+ }
+ if (o == null || getClass() != o.getClass()) {
+ return false;
+ }
+ final VersionData versionData = (VersionData) o;
+ return Objects.equals(oldVersion, versionData.oldVersion) &&
+ Objects.equals(currentVersion, versionData.currentVersion);
+ }
+
+ @Override
+ public int hashCode() {
+ return Objects.hash(oldVersion, currentVersion);
+ }
+ }
+}
diff --git a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
index 59942eb6bb6e8e1e9a988bce0d09757e575018b9..faf4d00bf288359db806913c4d2964324e8706b7 100644
--- a/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
+++ b/src/main/java/net/minecraft/server/dedicated/DedicatedServer.java
@@ -196,6 +196,7 @@ public class DedicatedServer extends MinecraftServer implements IMinecraftServer
return false;
}
com.destroystokyo.paper.PaperConfig.registerCommands();
+ com.destroystokyo.paper.VersionHistoryManager.INSTANCE.getClass(); // load version history now
// Paper end
this.setPVP(dedicatedserverproperties.pvp);
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