Put latest Camelot version in help command

src/main/java/net/neoforged/camelot/commands/information/HelpCommand.java

@@ -6,17 +6,28 @@
 import net.dv8tion.jda.api.interactions.Interaction;
 import net.dv8tion.jda.api.utils.messages.MessageEditBuilder;
 import net.dv8tion.jda.api.utils.messages.MessageEditData;
-import net.neoforged.camelot.commands.Commands;
 import net.neoforged.camelot.BotMain;
+import net.neoforged.camelot.commands.Commands;
 import net.neoforged.camelot.commands.PaginatableCommand;
 import net.neoforged.camelot.configuration.Common;
+import net.neoforged.camelot.util.CachedOnlineData;
 import net.neoforged.camelot.util.jda.ButtonManager;
+import org.apache.maven.artifact.versioning.DefaultArtifactVersion;
 
+import java.net.URI;
+import java.time.Duration;
 import java.time.Instant;
 import java.util.List;
 import java.util.concurrent.CompletableFuture;
 
 public class HelpCommand extends PaginatableCommand<PaginatableCommand.SimpleData> {
+    private static final CachedOnlineData<String> LATEST_VERSION = CachedOnlineData.builder()
+            .client(BotMain.HTTP_CLIENT)
+            .uri(URI.create("https://search.maven.org/solrsearch/select?q=g:net.neoforged.camelot+AND+a:camelot&core=gav&rows=1&wt=json"))
+            .cacheDuration(Duration.ofHours(1))
+            .json()
+            .map(o -> o.getAsJsonObject("response").getAsJsonArray("docs").get(0).getAsJsonObject().get("v").getAsString())
+            .build();
 
     public HelpCommand(ButtonManager buttonManager) {
         super(buttonManager);
@@ -44,8 +55,14 @@ public CompletableFuture<MessageEditData> createMessage(int page, SimpleData dat
      */
     public EmbedBuilder getHelpStartingAt(int index) {
         EmbedBuilder embed = new EmbedBuilder();
-        embed.setAuthor(Common.NAME_WITH_VERSION, Common.REPO, BotMain.get().getSelfUser().getAvatarUrl());
-        embed.setDescription("## Latest commits:\n");
+        embed.setAuthor(Common.NAME_WITH_VERSION, Common.WEBSITE, BotMain.get().getSelfUser().getAvatarUrl());
+
+        var latest = LATEST_VERSION.getOrBust();
+        if (!latest.equals(Common.VERSION)) {
+            embed.appendDescription("You're running an outdated Camelot version. The latest version is **" + latest + "**.\n");
+        }
+
+        embed.appendDescription("## Last commits of this version:\n");
 
         appendCommits: try (var is = HelpCommand.class.getResourceAsStream("/gitlog")) {
             if (is == null) break appendCommits;

src/main/java/net/neoforged/camelot/configuration/Common.java

@@ -9,14 +9,17 @@ public class Common {
 
     // The name of the bot.
     public static final String NAME = "Camelot";
+    public static final String VERSION;
     // The name of the bot following by " v${version}" if not in dev.
     public static final String NAME_WITH_VERSION;
 
     static {
         final String version = Common.class.getPackage().getImplementationVersion();
+        VERSION = (version == null ? "dev" : version);
         NAME_WITH_VERSION = version == null ? NAME : (NAME + " v" + version);
     }
 
     // The repository where development of Camelot happens.
     public static final String REPO = "https://github.com/NeoForged/Camelot";
+    public static final String WEBSITE = "https://camelot.rocks/";
 }

src/main/java/net/neoforged/camelot/util/CachedOnlineData.java

@@ -1,6 +1,7 @@
 package net.neoforged.camelot.util;
 
 import com.google.gson.Gson;
+import com.google.gson.JsonObject;
 import com.google.gson.reflect.TypeToken;
 import org.jetbrains.annotations.Nullable;
 import org.slf4j.Logger;
@@ -107,6 +108,14 @@ public Builder<T> gsonDecode(Gson gson, TypeToken<T> token) {
             ));
         }
 
+        /**
+         * Decodes the response as a {@link JsonObject}.
+         */
+        @SuppressWarnings({"unchecked", "rawtypes"})
+        public Builder<JsonObject> json() {
+            return gsonDecode(CODImpl.GSON, (TypeToken) TypeToken.get(JsonObject.class));
+        }
+
         /**
          * Changes the type of this builder by replacing the handler with one that maps the result of the previous handler.
          */
@@ -149,6 +158,7 @@ class CODImpl<T> implements CachedOnlineData<T> {
         thread.setDaemon(true);
         return thread;
     });
+    static final Gson GSON = new Gson();
 
     private final HttpClient client;
     private final HttpRequest request;