Add CommandExecuteEvent

api/src/main/java/com/velocitypowered/api/command/CommandManager.java

@@ -35,10 +35,21 @@ public interface CommandManager {
 
   /**
    * Attempts to execute a command from the specified {@code cmdLine}.
+   * CommandExecuteEvent will not called
    *
    * @param source the command's source
    * @param cmdLine the command to run
    * @return true if the command was found and executed, false if it was not
    */
   boolean execute(CommandSource source, String cmdLine);
+
+  /**
+   * Attempts to execute a command from the specified {@code cmdLine}.
+   *
+   * @param source the command's source
+   * @param cmdLine the command to run
+   * @param callEvent will CommandExecuteEvent called or not
+   * @return true if the command was found and executed, false if it was not
+   */
+  boolean execute(CommandSource source, String cmdLine, boolean callEvent);
 }

api/src/main/java/com/velocitypowered/api/event/command/CommandExecuteEvent.java

@@ -0,0 +1,143 @@
+package com.velocitypowered.api.event.command;
+
+import com.google.common.base.Preconditions;
+import com.velocitypowered.api.command.CommandSource;
+import com.velocitypowered.api.event.ResultedEvent;
+import com.velocitypowered.api.event.command.CommandExecuteEvent.CommandResult;
+import java.util.Optional;
+import org.checkerframework.checker.nullness.qual.NonNull;
+import org.checkerframework.checker.nullness.qual.Nullable;
+
+/**
+ * This event is fired when a player types in a chat message.
+ */
+public final class CommandExecuteEvent implements ResultedEvent<CommandResult> {
+
+  private final CommandSource commandSource;
+  private final String command;
+  private CommandResult result;
+
+  /**
+   * Constructs a PlayerChatEvent.
+   * @param commandSource the source executing the command
+   * @param command the command being executed without first slash
+   */
+  public CommandExecuteEvent(CommandSource commandSource, String command) {
+    this.commandSource = Preconditions.checkNotNull(commandSource, "commandSource");
+    this.command = Preconditions.checkNotNull(command, "command");
+    this.result = CommandResult.allowed();
+  }
+
+  public CommandSource getCommandSource() {
+    return commandSource;
+  }
+
+  /**
+   * Gets the original command being executed without first slash.
+   * @return the original command being executed
+   */
+  public String getCommand() {
+    return command;
+  }
+
+  @Override
+  public CommandResult getResult() {
+    return result;
+  }
+
+  @Override
+  public void setResult(CommandResult result) {
+    this.result = Preconditions.checkNotNull(result, "result");
+  }
+
+  @Override
+  public String toString() {
+    return "PlayerCommmandEvent{"
+        + "commandSource=" + commandSource
+        + ", command=" + command
+        + ", result=" + result
+        + '}';
+  }
+
+  /**
+   * Represents the result of the {@link CommandExecuteEvent}.
+   */
+  public static final class CommandResult implements Result {
+
+    private static final CommandResult ALLOWED = new CommandResult(true, false,null);
+    private static final CommandResult DENIED = new CommandResult(false, false,null);
+    private static final CommandResult FORWARD_TO_SERVER = new CommandResult(false, true, null);
+
+    private @Nullable String command;
+    private final boolean status;
+    private final boolean forward;
+
+    private CommandResult(boolean status, boolean forward, @Nullable String command) {
+      this.status = status;
+      this.forward = forward;
+      this.command = command;
+    }
+
+    public Optional<String> getCommand() {
+      return Optional.ofNullable(command);
+    }
+
+    public boolean isForwardToServer() {
+      return forward;
+    }
+
+    @Override
+    public boolean isAllowed() {
+      return status;
+    }
+
+    @Override
+    public String toString() {
+      return status ? "allowed" : "denied";
+    }
+
+    /**
+     * Allows the command to be sent, without modification.
+     * @return the allowed result
+     */
+    public static CommandResult allowed() {
+      return ALLOWED;
+    }
+
+    /**
+     * Prevents the command from being executed.
+     * @return the denied result
+     */
+    public static CommandResult denied() {
+      return DENIED;
+    }
+
+    /**
+     * Prevents the command from being executed, but forward command to server.
+     * @return the forward result
+     */
+    public static CommandResult forwardToServer() {
+      return FORWARD_TO_SERVER;
+    }
+
+    /**
+     * Prevents the command from being executed on proxy, but forward command to server.
+     * @param newCommand the command without first slash to use instead
+     * @return a result with a new command being forwarded to server
+     */
+    public static CommandResult forwardToServer(@NonNull String newCommand) {
+      Preconditions.checkNotNull(newCommand, "newCommand");
+      return new CommandResult(false, true, newCommand);
+    }
+
+    /**
+     * Allows the command to be executed, but silently replaced old command with another.
+     * @param newCommand the command to use instead without first slash
+     * @return a result with a new command
+     */
+    public static CommandResult command(@NonNull String newCommand) {
+      Preconditions.checkNotNull(newCommand, "newCommand");
+      return new CommandResult(true, false, newCommand);
+    }
+  }
+}

api/src/main/java/com/velocitypowered/api/event/player/PlayerChatEvent.java

@@ -70,6 +70,10 @@ public final class PlayerChatEvent implements ResultedEvent<PlayerChatEvent.Chat
       this.message = message;
     }
 
+    public Optional<String> getMessage() {
+      return Optional.ofNullable(message);
+    }
+
     @Override
     public boolean isAllowed() {
       return status;
@@ -96,10 +100,6 @@ public final class PlayerChatEvent implements ResultedEvent<PlayerChatEvent.Chat
       return DENIED;
     }
 
-    public Optional<String> getMessage() {
-      return Optional.ofNullable(message);
-    }
-
     /**
      * Allows the message to be sent, but silently replaced with another.
      * @param message the message to use instead
@@ -110,6 +110,4 @@ public final class PlayerChatEvent implements ResultedEvent<PlayerChatEvent.Chat
       return new ChatResult(true, message);
     }
   }
-
-
 }