bot physics complete

src/net/nuggetmc/ai/cmd/CommandHandler.java

@@ -0,0 +1,112 @@
+package net.nuggetmc.ai.cmd;
+
+import net.md_5.bungee.api.ChatColor;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabCompleter;
+
+import java.util.*;
+
+public class CommandHandler implements CommandExecutor, TabCompleter {
+
+    private final Map<String, CommandInterface> COMMANDS = new HashMap<>();
+
+    private final String PREFIX = "bot";
+
+    public void register(CommandInterface[] subCmds) {
+        for (CommandInterface cmd : subCmds) {
+            COMMANDS.put(cmd.getName(), cmd);
+        }
+    }
+
+    public String fetchName(CommandInterface subCmd) {
+        String name = subCmd.getClass().getSimpleName();
+        return name.substring(0, name.length() - 7).toLowerCase();
+    }
+
+    private boolean exists(String name) {
+        return COMMANDS.containsKey(name.toLowerCase());
+    }
+
+    private CommandInterface getExecutor(String name) {
+        return COMMANDS.get(name.toLowerCase());
+    }
+
+    public String nonPlayerMsg() {
+        return ChatColor.RED + "You must be a player to execute this command!";
+    }
+
+    public String usageMsg(CommandInterface subCmd) {
+        return ChatColor.RED + "Invalid arguments!\nUsage: /" + PREFIX + " " + subCmd.getName() + " " + subCmd.getUsage();
+    }
+
+    private void sendCmdInfo(CommandSender sender) {
+        sender.sendMessage(ChatColor.GRAY + "----------------------------------------");
+
+        sender.sendMessage(ChatColor.GOLD + "PlayerAI" + ChatColor.GRAY + " [" + ChatColor.RED + "v1.0" + ChatColor.GRAY + "]");
+
+        for (Map.Entry<String, CommandInterface> entry : COMMANDS.entrySet()) {
+            sender.sendMessage(ChatColor.GRAY + " ▪ " + ChatColor.YELLOW + "/" + PREFIX + " " + entry.getKey() + ChatColor.GRAY + " ▪ "
+                    + ChatColor.RESET +  entry.getValue().getDescription());
+        }
+
+        sender.sendMessage(ChatColor.GRAY + "----------------------------------------");
+    }
+
+    @Override
+    public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args) {
+        if (args.length == 0 || !exists(args[0])) {
+            sendCmdInfo(sender);
+            return true;
+        }
+
+        getExecutor(args[0]).onCommand(sender, cmd, label, Arrays.copyOfRange(args, 1, args.length));
+        return true;
+    }
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command cmd, String label, String[] args) {
+        if (!cmd.getName().equals("playerai")) return null;
+
+        List<String> groupnames;
+        int n = args.length;
+
+        switch (n) {
+            case 1:
+                groupnames = new ArrayList<>(COMMANDS.keySet());
+                String arg = args[n - 1];
+
+                if (!isEmptyTab(arg)) {
+                    return autofill(groupnames, arg);
+                }
+
+                return groupnames;
+
+            default:
+                return null;
+        }
+    }
+
+    private boolean isEmptyTab(String s) {
+        return s == null || s.equals("") || s.equals(" ") || s.isEmpty();
+    }
+
+    private List<String> autofill(List<String> groupnames, String input) {
+        List<String> list = new ArrayList<>();
+
+        for (String entry : groupnames) {
+            if (entry.length() >= input.length()) {
+                if (input.equalsIgnoreCase(entry.substring(0, input.length()))) {
+                    list.add(entry);
+                }
+            }
+        }
+
+        if (list.isEmpty()) {
+            return groupnames;
+        }
+
+        return list;
+    }
+}