Add CommandSource#sendRichMessage and #sendPlainMessage (#1256)

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

@@ -9,10 +9,52 @@ package com.velocitypowered.api.command;
 
 import com.velocitypowered.api.permission.PermissionSubject;
 import net.kyori.adventure.audience.Audience;
+import net.kyori.adventure.text.Component;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import net.kyori.adventure.text.minimessage.tag.resolver.TagResolver;
+import org.jetbrains.annotations.NotNull;
 
 /**
  * Represents something that can be used to run a {@link Command}.
  */
 public interface CommandSource extends Audience, PermissionSubject {
 
+  /**
+   * Sends a message with the MiniMessage format to this source.
+   *
+   * @param message MiniMessage content
+   * @see <a href="https://docs.advntr.dev/minimessage/format.html">MiniMessage docs</a>
+   *      for more information on the format.
+   **/
+  default void sendRichMessage(final @NotNull String message) {
+    this.sendMessage(MiniMessage.miniMessage().deserialize(message));
+  }
+
+  /**
+  * Sends a message with the MiniMessage format to this source.
+  *
+  * @param message MiniMessage content
+  * @param resolvers resolvers to use
+  * @see <a href="https://docs.advntr.dev/minimessage/">MiniMessage docs</a>
+  *     and <a href="https://docs.advntr.dev/minimessage/dynamic-replacements">MiniMessage Placeholders docs</a>
+  *     for more information on the format.
+  **/
+  default void sendRichMessage(
+          final @NotNull String message,
+          final @NotNull TagResolver @NotNull... resolvers
+  ) {
+    this.sendMessage(MiniMessage.miniMessage().deserialize(message, resolvers));
+  }
+
+  /**
+  * Sends a plain message to this source.
+  *
+  * @param message plain message
+  * @apiNote This method will not apply any form of parse to the text provided,
+  *      however, it is recommended not to use legacy color codes as this is a deprecated format
+   *     and not recommended.
+  */
+  default void sendPlainMessage(final @NotNull String message) {
+    this.sendMessage(Component.text(message));
+  }
 }