Updated commands to have optional aliases, and to fallback to /pluginName:cmdName on name conflict.

By: VictorD <victor.danell@gmail.com>

paper-api/src/main/java/org/bukkit/command/SimpleCommandMap.java

@@ -0,0 +1,61 @@
+package org.bukkit.command;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+import org.bukkit.entity.Player;
+
+public final class SimpleCommandMap implements CommandMap {
+    private final Map<String, Command> knownCommands = new HashMap<String, Command>();
+
+    /**
+     * Registers multiple commands. Returns name of first command for which fallback had to be used if any.
+     * @param plugin
+     * @return
+     */
+    public void registerAll(String fallbackPrefix, List<Command> commands) {
+        if (commands != null) {
+            for(Command c : commands) {
+                List<String> names = new ArrayList<String>();
+                names.add(c.getName());
+                names.addAll(c.getAliases());
+                
+                for(String name : names) {
+                    register(name, fallbackPrefix, c);                        
+                }
+            }
+        }
+    }
+    
+    /** 
+     * {@inheritDoc}
+     */
+    public boolean register(String name, String fallbackPrefix, Command command) {
+        boolean nameInUse = (knownCommands.get(command.getName()) != null);
+        if (nameInUse)
+            name = fallbackPrefix + ":" + name;
+        
+        knownCommands.put(name, command);
+        System.out.println("Adding cmd: " + name + " for plugin " + fallbackPrefix);
+        
+        return !nameInUse;
+    }
+
+    /** 
+     * {@inheritDoc}
+     */
+    public boolean dispatch(Player sender, String commandLine) {
+        String[] args = commandLine.split(" ");
+        String sentCommandLabel = args[0].substring(1);
+        
+        Command target = knownCommands.get(sentCommandLabel);
+        boolean isRegisteredCommand = (target != null);
+        if (isRegisteredCommand) {
+            target.execute(sender, sentCommandLabel, args);
+        }
+        return isRegisteredCommand;
+    }
+
+}