Starting to add custom messages to AntiVPN

Common/src/main/java/dev/brighten/antivpn/AntiVPN.java

@@ -8,6 +8,7 @@ import dev.brighten.antivpn.command.impl.AntiVPNCommand;
 import dev.brighten.antivpn.command.impl.LookupCommand;
 import dev.brighten.antivpn.database.VPNDatabase;
 import dev.brighten.antivpn.database.sql.MySqlVPN;
+import dev.brighten.antivpn.message.MessageHandler;
 import dev.brighten.antivpn.utils.VPNResponse;
 import dev.brighten.antivpn.utils.json.JSONException;
 import dev.brighten.antivpn.utils.json.JSONObject;
@@ -29,6 +30,7 @@ public class AntiVPN {
     private VPNExecutor executor;
     private PlayerExecutor playerExecutor;
     private VPNDatabase database;
+    private MessageHandler messageHandler;
     private List<Command> commands = new ArrayList<>();
     public int detections, checked;
 
@@ -44,6 +46,8 @@ public class AntiVPN {
         INSTANCE.executor.registerListeners();
         INSTANCE.config.update();
 
+        INSTANCE.messageHandler = new MessageHandler();
+
         switch(INSTANCE.config.getDatabaseType().toLowerCase()) {
             case "mysql":
             case "sql":{

Common/src/main/java/dev/brighten/antivpn/command/impl/AlertsCommand.java

@@ -1,8 +1,10 @@
 package dev.brighten.antivpn.command.impl;
 
+import dev.brighten.antivpn.AntiVPN;
 import dev.brighten.antivpn.api.APIPlayer;
 import dev.brighten.antivpn.command.Command;
 import dev.brighten.antivpn.command.CommandExecutor;
+import dev.brighten.antivpn.message.VpnString;
 
 import java.util.Collections;
 import java.util.List;
@@ -47,17 +49,15 @@ public class AlertsCommand extends Command {
     @Override
     public String execute(CommandExecutor executor, String[] args) {
         Optional<APIPlayer> pgetter = executor.getPlayer();
-        if(!pgetter.isPresent()) return "&cYou must be a player to execute this command!";
+        if(!pgetter.isPresent()) return AntiVPN.getInstance().getMessageHandler()
+                .getString("command-misc-playerRequired").getMessage();
 
         APIPlayer player = pgetter.get();
 
-        if(player.isAlertsEnabled()) {
-            player.setAlertsEnabled(false);
-            return "&7You have set your AntiVPN alerts to: &coff";
-        } else {
-            player.setAlertsEnabled(true);
-            return "&7You have set your AntiVPN alerts to: &aon";
-        }
+        player.setAlertsEnabled(!player.isAlertsEnabled());
+
+        return AntiVPN.getInstance().getMessageHandler().getString("command-alerts-toggled")
+                .getFormattedMessage(new VpnString.Var<>("state", player.isAlertsEnabled()));
     }
 
     @Override

Common/src/main/java/dev/brighten/antivpn/message/MessageHandler.java

@@ -0,0 +1,39 @@
+package dev.brighten.antivpn.message;
+
+import java.util.HashMap;
+import java.util.Map;
+import java.util.function.Function;
+
+public class MessageHandler {
+    private final Map<String, VpnString> messages = new HashMap<>();
+
+    public VpnString getString(String key) {
+        if(!messages.containsKey(key)) {
+            throw new NullPointerException("There is no VpnString with the key \"" + key + "\"");
+        }
+
+        return messages.get(key);
+    }
+
+    public void reloadStrings() {
+        for (VpnString value : messages.values()) {
+            value.updateString();
+        }
+    }
+
+    public void clearStrings() {
+        messages.clear();
+    }
+
+    public void addString(VpnString string, Function<VpnString, String> getter) {
+        string.setConfigStringGetter(getter);
+        messages.put(string.getKey(), string);
+    }
+
+    public void initStrings(Function<VpnString, String> getter) {
+        addString(new VpnString("command-misc-playerRequired",
+                "&cYou must be a player to execute this command!"), getter);
+        addString(new VpnString("command-alerts-toggled",
+                "&7Your player proxy notifications have been set to: &e%state%"), getter);
+    }
+}

Common/src/main/java/dev/brighten/antivpn/message/VpnString.java

@@ -0,0 +1,58 @@
+package dev.brighten.antivpn.message;
+
+import dev.brighten.antivpn.api.APIPlayer;
+import lombok.*;
+
+import java.util.concurrent.Callable;
+import java.util.function.Consumer;
+import java.util.function.Function;
+
+@Getter
+public class VpnString {
+    private final String key;
+    private final String defaultMessage;
+    private String message;
+    @Setter
+    private Function<VpnString, String> configStringGetter;
+
+    public VpnString(String key, String defaultMessage) {
+        this.key = key;
+        this.defaultMessage = defaultMessage;
+        this.message = defaultMessage;
+    }
+
+    @SneakyThrows
+    public void updateString() {
+        if(configStringGetter == null) throw new Exception("The configStringGetter for string " + key + " is null!");
+
+        message = configStringGetter.apply(this);
+    }
+
+    public String getFormattedMessage(Var<String, Object>... replacements) {
+        String formatted = message;
+
+        for (Var<String, Object> replacement : replacements) {
+            formatted = formatted
+                    .replace("%" + replacement.getKey() + "%", replacement.getReplacement().toString());
+        }
+
+        return formatted;
+    }
+
+    public void sendMessage(APIPlayer player, Var<String, Object>... replacements) {
+        String formatted = message;
+
+        for (Var<String, Object> replacement : replacements) {
+            formatted = formatted
+                    .replace("%" + replacement.getKey() + "%", replacement.getReplacement().toString());
+        }
+        player.sendMessage(formatted);
+    }
+
+    @Getter
+    @RequiredArgsConstructor
+    public static class Var<S, O> {
+        private final String key;
+        private final Object replacement;
+    }
+}