Adding pre-send filters

gradle.properties

@@ -1,7 +1,7 @@
 minecraft_version=1.18
 yarn_mappings=1.18+build.1
 loader_version=0.12.5
-mod_version=1.3.3
+mod_version=1.3.4
 maven_group=io.github.darkkronicle
 archives_base_name=AdvancedChatCore
 fabric_api_version=0.43.1+1.18

src/main/java/io/github/darkkronicle/advancedchatcore/chat/AdvancedChatScreen.java

@@ -1,5 +1,5 @@
 /*
- * Copyright (C) 2021 DarkKronicle
+ * Copyright (C) 2021-2022 DarkKronicle
  *
  * This Source Code Form is subject to the terms of the Mozilla Public
  * License, v. 2.0. If a copy of the MPL was not distributed with this
@@ -168,12 +168,7 @@ public boolean keyPressed(int keyCode, int scanCode, int modifiers) {
         if (keyCode == KeyCodes.KEY_ENTER || keyCode == KeyCodes.KEY_KP_ENTER) {
             String string = this.chatField.getText().trim();
             // Strip message and send
-            if (!string.isEmpty()) {
-                if (string.length() > 256) {
-                    string = string.substring(0, 256);
-                }
-                this.sendMessage(string);
-            }
+            MessageSender.getInstance().sendMessage(string);
             this.chatField.setText("");
             last = "";
             // Exit

src/main/java/io/github/darkkronicle/advancedchatcore/chat/MessageSender.java

@@ -0,0 +1,54 @@
+/*
+ * Copyright (C) 2022 DarkKronicle
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+package io.github.darkkronicle.advancedchatcore.chat;
+
+import io.github.darkkronicle.advancedchatcore.interfaces.IStringFilter;
+import java.util.ArrayList;
+import java.util.List;
+import java.util.Optional;
+import net.minecraft.client.MinecraftClient;
+
+public class MessageSender {
+
+    private static final MessageSender INSTANCE = new MessageSender();
+    private final MinecraftClient client = MinecraftClient.getInstance();
+
+    public static MessageSender getInstance() {
+        return INSTANCE;
+    }
+
+    private MessageSender() {}
+
+    private final List<IStringFilter> filters = new ArrayList<>();
+
+    public void addFilter(IStringFilter filter) {
+        filters.add(filter);
+    }
+
+    public void addFilter(IStringFilter filter, int index) {
+        filters.add(index, filter);
+    }
+
+    public void sendMessage(String string) {
+        String unfiltered = string;
+        for (IStringFilter filter : filters) {
+            Optional<String> filtered = filter.filter(string);
+            if (filtered.isPresent()) {
+                string = filtered.get();
+            }
+        }
+        if (string.length() > 256) {
+            string = string.substring(0, 256);
+        }
+        this.client.inGameHud.getChatHud().addToMessageHistory(unfiltered);
+
+        if (client.player != null) {
+            this.client.player.sendChatMessage(string);
+        }
+    }
+}

src/main/java/io/github/darkkronicle/advancedchatcore/interfaces/IStringFilter.java

@@ -0,0 +1,16 @@
+/*
+ * Copyright (C) 2022 DarkKronicle
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at https://mozilla.org/MPL/2.0/.
+ */
+package io.github.darkkronicle.advancedchatcore.interfaces;
+
+import java.util.Optional;
+
+/** An interface to modify raw string */
+public interface IStringFilter {
+
+    Optional<String> filter(String input);
+}