help command

java/src/game/command/CachedExecutable.java

@@ -86,4 +86,8 @@ public class CachedExecutable {
 	public String getName() {
 		return this.name;
 	}
+	
+	public String toString() {
+		return this.name;
+	}
 }

java/src/game/command/ScriptEnvironment.java

@@ -11,6 +11,7 @@ import com.google.common.collect.Maps;
 
 import game.Server;
 import game.color.TextColor;
+import game.command.commands.CommandHelp;
 import game.command.commands.CommandSpawn;
 import game.log.Log;
 
@@ -62,6 +63,10 @@ public class ScriptEnvironment {
 		return this.server;
 	}
 	
+	public Map<String, CachedExecutable> getExecutables() {
+		return this.executables;
+	}
+	
 	public ScriptExecutor getExecutor() {
 		return this.currentExecutor;
 	}
@@ -191,5 +196,7 @@ public class ScriptEnvironment {
 		});
 		
 		this.registerExecutable(new CommandSpawn());
+		
+		this.registerExecutable(new CommandHelp(this));
 	}
 }

java/src/game/command/commands/CommandHelp.java

@@ -0,0 +1,57 @@
+package game.command.commands;
+
+import java.util.List;
+import java.util.Map.Entry;
+import java.util.function.Function;
+
+import com.google.common.collect.Lists;
+
+import game.command.ArgumentParser;
+import game.command.CachedExecutable;
+import game.command.Parameter;
+import game.command.ScriptEnvironment;
+import game.command.ScriptExecutable;
+import game.command.ScriptExecutor;
+import game.util.Util;
+
+public class CommandHelp extends ScriptExecutable {
+	public CommandHelp(ScriptEnvironment env) {
+		super("help");
+
+		this.setParamsOptional();
+		this.addEnum("command", CachedExecutable.class, env.getExecutables().values());
+	}
+	
+	public Object exec(ScriptEnvironment env, ScriptExecutor exec, CachedExecutable command) {
+		if(command == null) {
+			for(CachedExecutable cmd : env.getExecutables().values()) {
+				this.exec(env, exec, cmd);
+			}
+			return null;
+		}
+		List<String> list = Lists.newArrayList();
+		for(Entry<String, Parameter> entry : command.getParameters().entrySet()) {
+			Parameter param = entry.getValue();
+			if(entry.getKey().length() == 1 && !param.isPositional() && param.hasShortName()) {
+				list.add("-" + param.getShortName() + (param.getParsers().isEmpty() ? " (" + param.getName() + ")" : (param.getParsers().size() == 1 && 
+					param.getParsers().get(0).getName().equals(param.getName()) ? " <" + param.getName() + ">" : 
+					" (" + param.getName() + ")" + Util.buildLines(" ", new Function<ArgumentParser, String>() {
+					public String apply(ArgumentParser parser) {
+						return "<" + parser.getName() + ">";
+					}
+				}, param.getParsers()))));
+			}
+		}
+		for(Parameter param : command.getPositionals()) {
+			list.add((param.isRequired() ? "<" : "[") + (param.getParsers().size() == 1 && 
+				param.getParsers().get(0).getName().equals(param.getName()) ? param.getName() : 
+				"(" + param.getName() + ") " + Util.buildLines(" ", new Function<ArgumentParser, String>() {
+				public String apply(ArgumentParser parser) {
+					return "<" + parser.getName() + ">";
+				}
+			}, param.getParsers())) + (param.isRequired() ? ">" : "]"));
+		}
+		exec.logConsole("%s %s", command.getName(), Util.buildLines(" ", list));
+		return null;
+	}
+}