[FEATURE] Implement Message Filtering

src/main/java/com/hypherionmc/sdlink/core/config/SDLinkConfig.java

@@ -62,6 +62,10 @@ public class SDLinkConfig extends ModuleConfig {
     @SpecComment("Execute Minecraft commands in Discord")
     public LinkedCommandsConfig linkedCommands = new LinkedCommandsConfig();
 
+    @Path("ignoredMessages")
+    @SpecComment("Configure messages that will be ignored when relaying to discord")
+    public MessageIgnoreConfig ignoreConfig = new MessageIgnoreConfig();
+
     public SDLinkConfig() {
         super("sdlink", "simple-discord-link");
         registerAndSetup(this);

src/main/java/com/hypherionmc/sdlink/core/config/impl/MessageIgnoreConfig.java

@@ -0,0 +1,52 @@
+package com.hypherionmc.sdlink.core.config.impl;
+
+import me.hypherionmc.moonconfig.core.conversion.Path;
+import me.hypherionmc.moonconfig.core.conversion.SpecComment;
+
+import java.util.ArrayList;
+import java.util.List;
+
+public class MessageIgnoreConfig {
+
+    @Path("ignoredMessages")
+    @SpecComment("Filter certain types of messages from being relayed back to discord")
+    public boolean enabled = true;
+
+    @Path("entries")
+    @SpecComment("List of entries to process")
+    public List<Ignore> entires = new ArrayList<>();
+
+    @Path("ignoredThreads")
+    @SpecComment("Ignore messages sent from certain threads")
+    public List<String> ignoredThread = new ArrayList<>();
+
+    public static class Ignore {
+        @Path("search")
+        @SpecComment("The text to search for in the message")
+        public String search;
+
+        @Path("replace")
+        @SpecComment("Text to replace `search` with, if it's found. Leave empty to ignore")
+        public String replace;
+
+        @Path("searchMode")
+        @SpecComment("How should `search` be found in the text. Valid entries are STARTS_WITH, MATCHES and CONTAINS")
+        public FilterMode searchMode = FilterMode.CONTAINS;
+
+        @Path("action")
+        @SpecComment("How should `replace` be treated, when `search` is found using `searchMode`")
+        public ActionMode action = ActionMode.REPLACE;
+    }
+
+    public enum FilterMode {
+        STARTS_WITH,
+        MATCHES,
+        CONTAINS
+    }
+
+    public enum ActionMode {
+        REPLACE,
+        IGNORE
+    }
+
+}

src/main/java/com/hypherionmc/sdlink/core/messaging/discord/DiscordMessage.java

@@ -48,6 +48,9 @@ public final class DiscordMessage {
         if (!BotController.INSTANCE.isBotReady())
             return;
 
+        if (message.isEmpty())
+            return;
+
         try {
             if (messageType == MessageType.CONSOLE) {
                 sendConsoleMessage();

src/main/java/com/hypherionmc/sdlink/core/messaging/discord/DiscordMessageBuilder.java

@@ -5,8 +5,12 @@
 package com.hypherionmc.sdlink.core.messaging.discord;
 
 import com.hypherionmc.sdlink.core.accounts.DiscordAuthor;
+import com.hypherionmc.sdlink.core.config.SDLinkConfig;
+import com.hypherionmc.sdlink.core.config.impl.MessageIgnoreConfig;
 import com.hypherionmc.sdlink.core.messaging.MessageType;
 
+import java.util.Optional;
+
 /**
  * @author HypherionSA
  * Used to construct a {@link DiscordMessage} to be sent back to discord
@@ -43,9 +47,40 @@ public final class DiscordMessageBuilder {
      * The Actual message that will be sent
      */
     public DiscordMessageBuilder message(String message) {
-        message = message.replace("<@", "");
+        if (this.messageType == MessageType.CHAT) {
-        message = message.replace("@everyone", "");
+            message = message.replace("<@", "");
-        message = message.replace("@here", "");
+            message = message.replace("@everyone", "");
+            message = message.replace("@here", "");
+        }
+
+        if (SDLinkConfig.INSTANCE.ignoreConfig.enabled) {
+            for (MessageIgnoreConfig.Ignore i : SDLinkConfig.INSTANCE.ignoreConfig.entires) {
+                if (i.searchMode == MessageIgnoreConfig.FilterMode.MATCHES && message.equalsIgnoreCase(i.search)) {
+                    if (i.action == MessageIgnoreConfig.ActionMode.REPLACE) {
+                        message = message.replace(i.search, i.replace);
+                    } else {
+                        message = "";
+                    }
+                }
+
+                if (i.searchMode == MessageIgnoreConfig.FilterMode.CONTAINS && message.contains(i.search)) {
+                    if (i.action == MessageIgnoreConfig.ActionMode.REPLACE) {
+                        message = message.replace(i.search, i.replace);
+                    } else {
+                        message = "";
+                    }
+                }
+
+                if (i.searchMode == MessageIgnoreConfig.FilterMode.STARTS_WITH && message.startsWith(i.search)) {
+                    if (i.action == MessageIgnoreConfig.ActionMode.REPLACE) {
+                        message = message.replace(i.search, i.replace);
+                    } else {
+                        message = "";
+                    }
+                }
+            }
+        }
+
         this.message = message;
         return this;
     }