Vanilla commands: help, list

vanilla_commands/src/main/java/mc/commands/HelpCommand.java

@@ -0,0 +1,62 @@
+/*
+ * DmitriyMX <dimon550@gmail.com>
+ * 2018-05-23
+ */
+package mc.commands;
+
+import lombok.extern.slf4j.Slf4j;
+import mc.core.chat.ChatStyle;
+import mc.core.chat.CommandExecutor;
+import mc.core.chat.CommanderChatProcessor;
+import mc.core.player.Player;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.context.ApplicationContext;
+
+import java.util.Optional;
+
+@Slf4j
+public class HelpCommand implements CommandExecutor {
+    @Autowired
+    private ApplicationContext applicationContext;
+    private CommanderChatProcessor commanderChatProcessor;
+
+    @Override
+    public String getName() {
+        return "help";
+    }
+
+    @Override
+    public Optional<String[]> getAliases() {
+        return Optional.of(new String[]{"?"});
+    }
+
+    @Override
+    public Optional<String> getUsage() {
+        return Optional.empty();
+    }
+
+    @Override
+    public String getDescription() {
+        return "shows this message";
+    }
+
+    @Override
+    public void execute(Player sender, String... args) {
+        if (commanderChatProcessor == null) {
+            commanderChatProcessor = applicationContext.getBean(CommanderChatProcessor.class);
+            if (commanderChatProcessor == null) {
+                log.error("Error get bean of type \"CommanderChatProcessor\". WTF?!");
+                sender.getChannel().sendChatMessage(ChatStyle.RED + "!!-Server error-!!");
+                return;
+            }
+        }
+
+        final String messageFormat = ChatStyle.RED + "%s " + ChatStyle.GRAY + "- " + ChatStyle.WHITE + "%s";
+        commanderChatProcessor.getAllCommands().forEach(commandExecutor -> {
+            sender.getChannel().sendChatMessage(String.format(messageFormat,
+                    commandExecutor.getUsage().orElse(commandExecutor.getName()),
+                    commandExecutor.getDescription()
+            ));
+        });
+    }
+}