Add /bluemap help command to show all available commands

closes #79

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/commands/Commands.java

@@ -95,6 +95,12 @@ public void init() {
 				.executes(this::statusCommand)
 				.build();
 		
+		LiteralCommandNode<S> helpCommand = 
+				literal("help")
+				.requires(requirementsUnloaded("bluemap.help"))
+				.executes(this::helpCommand)
+				.build();
+		
 		LiteralCommandNode<S> reloadCommand = 
 				literal("reload")
 				.requires(requirementsUnloaded("bluemap.reload"))
@@ -216,6 +222,7 @@ public void init() {
 		
 		// command tree
 		dispatcher.getRoot().addChild(baseCommand);
+		baseCommand.addChild(helpCommand);
 		baseCommand.addChild(reloadCommand);
 		baseCommand.addChild(debugCommand);
 		baseCommand.addChild(pauseCommand);
@@ -304,6 +311,34 @@ public int statusCommand(CommandContext<S> context) {
 		return 1;
 	}
 	
+	public int helpCommand(CommandContext<S> context) {
+		CommandSource source = commandSourceInterface.apply(context.getSource());
+		
+		source.sendMessage(Text.of(TextColor.BLUE, "BlueMap Commands:"));
+		for (String usage : dispatcher.getAllUsage(dispatcher.getRoot().getChild("bluemap"), context.getSource(), true)) {
+			Text usageText = Text.of(TextColor.GREEN, "/bluemap");
+			
+			String[] arguments = usage.split(" ");
+			for (String arg : arguments) {
+				if (arg.isEmpty()) continue;
+				if (arg.charAt(0) == '<' && arg.charAt(arg.length() - 1) == '>') {
+					usageText.addChild(Text.of(TextColor.GRAY, " " + arg));
+				} else {
+					usageText.addChild(Text.of(TextColor.WHITE, " " + arg));
+				}
+			}
+			
+			source.sendMessage(usageText);
+		}
+		
+		source.sendMessage(
+				Text.of(TextColor.BLUE, "\nOpen this link to get a description for each command:\n")
+				.addChild(Text.of(TextColor.GRAY, "https://bluecolo.red/bluemap-commands").setClickLink("https://bluecolo.red/bluemap-commands"))
+				);
+		
+		return 1;
+	}
+	
 	public int reloadCommand(CommandContext<S> context) {
 		CommandSource source = commandSourceInterface.apply(context.getSource());
 		

BlueMapCommon/src/main/java/de/bluecolored/bluemap/common/plugin/text/Text.java

@@ -36,6 +36,7 @@ public class Text {
 	private Set<TextFormat> formats = new HashSet<>();
 	private Text hoverText;
 	private String clickCommand;
+	private String clickLink;
 	private List<Text> children = new ArrayList<>();
 	
 	public Text setHoverText(Text hoverText) {
@@ -50,6 +51,12 @@ public Text setClickCommand(String clickCommand) {
 		return this;
 	}
 	
+	public Text setClickLink(String clickLink) {
+		this.clickLink = clickLink;
+		
+		return this;
+	}
+	
 	public Text addChild(Text child) {
 		children.add(child);
 		
@@ -82,6 +89,13 @@ public String toJSONString() {
 			sb.append(quote("action")).append(":").append(quote("run_command")).append(',');
 			sb.append(quote("value")).append(":").append(quote(clickCommand));
 			sb.append("},");
+		} 
+		
+		else if (clickLink != null) {
+			sb.append(quote("clickEvent")).append(":{");
+			sb.append(quote("action")).append(":").append(quote("open_url")).append(',');
+			sb.append(quote("value")).append(":").append(quote(clickLink));
+			sb.append("},");
 		}
 		
 		if (!children.isEmpty()) {

implementations/spigot/src/main/resources/plugin.yml

@@ -10,6 +10,7 @@ permissions:
   bluemap.*:
     children:
       bluemap.status: true
+      bluemap.help: true
       bluemap.reload: true
       bluemap.pause: true
       bluemap.resume: true
@@ -19,6 +20,8 @@ permissions:
     default: op
   bluemap.status:
     default: op
+  bluemap.help:
+    default: op
   bluemap.reload:
     default: op
   bluemap.pause: