[Bleeding] Implemented customizable permission messages.

By: Wesley Wolfe <weswolf@aol.com>

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

@@ -21,6 +21,7 @@ public abstract class Command {
     protected String description = "";
     protected String usageMessage;
     private String permission;
+    private String permissionMessage;
 
     protected Command(String name) {
         this(name, "", "/" + name, new ArrayList<String>());
@@ -86,7 +87,14 @@ public abstract class Command {
             return true;
         }
 
-        target.sendMessage(ChatColor.RED + "I'm sorry, but you do not have permission to perform this command. Please contact the server administrators if you believe that this is in error.");
+        if (permissionMessage == null) {
+            target.sendMessage(ChatColor.RED + "I'm sorry, but you do not have permission to perform this command. Please contact the server administrators if you believe that this is in error.");
+        } else if (permissionMessage.length() != 0) {
+            for (String line : permissionMessage.replace("<permission>", permission).split("\n")) {
+                target.sendMessage(line);
+            }
+        }
+
         return false;
     }
 
@@ -171,6 +179,15 @@ public abstract class Command {
         return activeAliases;
     }
 
+    /**
+     * Returns a message to be displayed on a failed permission check for this command
+     *
+     * @return Permission check failed message
+     */
+    public String getPermissionMessage() {
+        return permissionMessage;
+    }
+
     /**
      * Gets a brief description of this command
      *
@@ -214,6 +231,17 @@ public abstract class Command {
         return this;
     }
 
+    /**
+     * Sets the message sent when a permission check fails
+     *
+     * @param permissionMessage New permission message, null to indicate default message, or an empty string to indicate no message
+     * @return This command object, for linking
+     */
+    public Command setPermissionMessage(String permissionMessage) {
+        this.permissionMessage = permissionMessage;
+        return this;
+    }
+
     /**
      * Sets the example usage of this command
      *

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

@@ -27,6 +27,7 @@ public class PluginCommandYamlParser {
                 Object usage = entry.getValue().get("usage");
                 Object aliases = entry.getValue().get("aliases");
                 Object permission = entry.getValue().get("permission");
+                Object permissionMessage = entry.getValue().get("permission-message");
 
                 if (description != null) {
                     newCmd.setDescription(description.toString());
@@ -54,6 +55,10 @@ public class PluginCommandYamlParser {
                     newCmd.setPermission(permission.toString());
                 }
 
+                if (permissionMessage != null) {
+                    newCmd.setPermissionMessage(permissionMessage.toString());
+                }
+
                 pluginCmds.add(newCmd);
             }
         }