Add /mv generators command

src/main/java/org/mvplugins/multiverse/core/commands/GeneratorsCommand.java

@@ -0,0 +1,104 @@
+package org.mvplugins.multiverse.core.commands;
+
+import java.util.List;
+
+import co.aikar.commands.InvalidCommandArgument;
+import co.aikar.commands.MessageType;
+import co.aikar.commands.annotation.CommandAlias;
+import co.aikar.commands.annotation.CommandCompletion;
+import co.aikar.commands.annotation.CommandPermission;
+import co.aikar.commands.annotation.Description;
+import co.aikar.commands.annotation.Optional;
+import co.aikar.commands.annotation.Subcommand;
+import co.aikar.commands.annotation.Syntax;
+import jakarta.inject.Inject;
+import org.bukkit.ChatColor;
+import org.jetbrains.annotations.NotNull;
+import org.jvnet.hk2.annotations.Service;
+
+import org.mvplugins.multiverse.core.commandtools.MVCommandIssuer;
+import org.mvplugins.multiverse.core.commandtools.MVCommandManager;
+import org.mvplugins.multiverse.core.commandtools.MultiverseCommand;
+import org.mvplugins.multiverse.core.commandtools.flags.CommandValueFlag;
+import org.mvplugins.multiverse.core.commandtools.flags.ParsedCommandFlags;
+import org.mvplugins.multiverse.core.display.ContentDisplay;
+import org.mvplugins.multiverse.core.display.filters.ContentFilter;
+import org.mvplugins.multiverse.core.display.filters.DefaultContentFilter;
+import org.mvplugins.multiverse.core.display.filters.RegexContentFilter;
+import org.mvplugins.multiverse.core.display.handlers.PagedSendHandler;
+import org.mvplugins.multiverse.core.display.parsers.ListContentProvider;
+import org.mvplugins.multiverse.core.utils.MVCorei18n;
+import org.mvplugins.multiverse.core.world.generators.GeneratorProvider;
+
+/**
+ * List all gamerules in your current or specified world.
+ */
+@Service
+@CommandAlias("mv")
+class GeneratorsCommand extends MultiverseCommand {
+
+    private final GeneratorProvider generatorProvider;
+
+    private final CommandValueFlag<Integer> PAGE_FLAG = flag(CommandValueFlag
+            .builder("--page", Integer.class)
+            .addAlias("-p")
+            .context(value -> {
+                try {
+                    return Integer.parseInt(value);
+                } catch (NumberFormatException e) {
+                    throw new InvalidCommandArgument("Invalid page number: " + value);
+                }
+            })
+            .build());
+
+    private final CommandValueFlag<ContentFilter> FILTER_FLAG = flag(CommandValueFlag
+            .builder("--filter", ContentFilter.class)
+            .addAlias("-f")
+            .context(value -> {
+                try {
+                    return RegexContentFilter.fromString(value);
+                } catch (IllegalArgumentException e) {
+                    throw new InvalidCommandArgument("Invalid filter: " + value);
+                }
+            })
+            .build());
+
+    @Inject
+    GeneratorsCommand(@NotNull MVCommandManager commandManager, @NotNull GeneratorProvider generatorProvider) {
+        super(commandManager);
+        this.generatorProvider = generatorProvider;
+    }
+
+    @Subcommand("generators|gens")
+    @CommandPermission("multiverse.core.generator")
+    @CommandCompletion("@flags:groupName=mvgeneratorscommand @flags:groupName=mvgeneratorscommand")
+    @Syntax("")
+    @Description("{@@mv-core.generators.description}")
+    void onGamerulesCommand(
+            @NotNull MVCommandIssuer issuer,
+
+            @Optional
+            @Syntax("[--page <page>] [--filter <filter>]")
+            @Description("{@@mv-core.generators.description.flags}")
+            String[] flags) {
+        ParsedCommandFlags parsedFlags = parseFlags(flags);
+
+        // Get the generators loaded using the command suggestions
+        List<String> generators = (List<String>) generatorProvider.suggestGeneratorString("");
+
+        // Tell the user if we cannot find any generator plugins, then abort
+        if (generators.isEmpty()) {
+            issuer.sendMessage(commandManager.formatMessage(issuer, MessageType.INFO, MVCorei18n.GENERATORS_EMPTY));
+            return;
+        }
+
+        ContentDisplay.create()
+                .addContent(ListContentProvider.forContent(generators))
+                .withSendHandler(PagedSendHandler.create()
+                        .withHeader("%s====[ Multiverse Generator List ]====", ChatColor.AQUA)
+                        .doPagination(true)
+                        .withTargetPage(parsedFlags.flagValue(PAGE_FLAG, 1))
+                        .withFilter(parsedFlags.flagValue(FILTER_FLAG, DefaultContentFilter.get())))
+                .send(issuer);
+    }
+}

src/main/java/org/mvplugins/multiverse/core/utils/MVCorei18n.java

@@ -60,6 +60,11 @@ public enum MVCorei18n implements MessageKeyProvider {
     GAMERULES_DESCRIPTION_WORLD,
     GAMERULES_TITLE,
 
+    // Generators command
+    GENERATORS_DESCRIPTION,
+    GENERATORS_DESCRIPTION_FLAGS,
+    GENERATORS_EMPTY,
+
     // import command
     IMPORT_IMPORTING,
     IMPORT_SUCCESS,

src/main/resources/multiverse-core_en.properties

@@ -75,6 +75,11 @@ mv-core.gamerules.description.page=The page to view
 mv-core.gamerules.description.world=The world to list gamerules in
 mv-core.gamerules.title= --- Gamerules for {world} ---
 
+# /mv generators
+mv-core.generators.description=Lists generators known to Multiverse
+mv-core.generators.description.flags=Filter - only shows entries matching this. Page - the page to show
+mv-core.generators.empty=&cNo Generator Plugins found.
+
 # /mv import
 mv-core.import.description=Imports an existing world folder.
 mv-core.import.name.description=Name of the world folder.