linking system

src/main/java/dev/plex/futura/Futura.java

@@ -1,6 +1,8 @@
 package dev.plex.futura;
 
 import dev.plex.futura.bot.BotHandler;
+import dev.plex.futura.bot.linking.LinkingManager;
+import dev.plex.futura.bot.listener.LinkingListener;
 import dev.plex.futura.config.Config;
 import dev.plex.futura.listener.ChatListener;
 import org.bstats.bukkit.Metrics;
@@ -13,6 +15,7 @@ public final class Futura extends JavaPlugin
     private static Futura plugin;
 
     private BotHandler botHandler;
+    private LinkingManager linkingManager;
 
     public Config config;
     public Config messages;
@@ -31,6 +34,7 @@ public final class Futura extends JavaPlugin
             this.saveResource("messages.yml", false);
         }
         botHandler = new BotHandler();
+        linkingManager = new LinkingManager();
     }
 
     @Override
@@ -43,6 +47,7 @@ public final class Futura extends JavaPlugin
         if (this.botHandler.ready())
         {
             this.botHandler.jda().addEventListener(chatListener);
+            this.botHandler.jda().addEventListener(new LinkingListener());
         }
 
         // Metrics @ https://bstats.org/plugin/bukkit/Futura/20848
@@ -63,4 +68,9 @@ public final class Futura extends JavaPlugin
     {
         return this.botHandler;
     }
+
+    public LinkingManager linkingManager()
+    {
+        return this.linkingManager;
+    }
 }

src/main/java/dev/plex/futura/bot/linking/LinkingManager.java

@@ -0,0 +1,74 @@
+package dev.plex.futura.bot.linking;
+
+import com.google.common.collect.Maps;
+import dev.plex.futura.Futura;
+import net.kyori.adventure.text.minimessage.MiniMessage;
+import org.apache.commons.lang3.RandomStringUtils;
+import org.bukkit.entity.Player;
+
+import java.util.Map;
+import java.util.UUID;
+
+/**
+ * @author Taah
+ * @since 6:51 PM [02-08-2024]
+ */
+public class LinkingManager
+{
+    private static final Map<UUID, String> CODES = Maps.newHashMap();
+    private final boolean enabled;
+
+    public LinkingManager()
+    {
+        this.enabled = Futura.plugin().config.getBoolean("discord.linking.enabled", false);
+    }
+
+    public void requestCode(Player player)
+    {
+        if (!Futura.plugin().botHandler().ready())
+        {
+            player.sendMessage("<red>The bot is not connected / online. Please contact an administrator.");
+            return;
+        }
+        if (!this.enabled)
+        {
+            player.sendMessage(MiniMessage.miniMessage().deserialize(Futura.plugin().messages.getString("linkingDisabled", "<red>Discord to Minecraft account linking is currently disabled.")));
+            return;
+        }
+
+        //TODO: Check if user is already linked on cache loaded from database
+
+        final UUID uuid = player.getUniqueId();
+
+        if (CODES.containsKey(uuid))
+        {
+            player.sendMessage(MiniMessage.miniMessage().deserialize(Futura.plugin().messages.getString("accountLinkingInProgress", "<red>Can't request a new code currently, user has already requested a code. Please try again in a minute.")));
+            return;
+        }
+
+        final String code = RandomStringUtils.randomAlphanumeric(8).toLowerCase();
+        CODES.put(uuid, code);
+
+        final int expirationTime = Futura.plugin().config.getInt("discord.linking.expirationTime", 60);
+        final String codeRequested = Futura.plugin().messages.getString("codeRequested", "<green>The code you have requested is %code%. Please do not share this. In order to link your account, message the %bot-name% bot with your code. This code will expire in %expirationTime% seconds.")
+                .replace("%code%", code)
+                .replace("%bot-name%", Futura.plugin().botHandler().jda().getSelfUser().getName())
+                .replace("%expiration-time%", String.valueOf(expirationTime));
+
+        player.sendMessage(MiniMessage.miniMessage().deserialize(codeRequested));
+        Futura.plugin().getServer().getScheduler().runTaskLater(Futura.plugin(), () ->
+        {
+            CODES.remove(uuid);
+        }, 20L * expirationTime);
+    }
+
+    public UUID matchCode(String code)
+    {
+        final Map.Entry<UUID, String> uuidStringEntry = CODES.entrySet().stream().filter(entry -> entry.getValue().equals(code)).findFirst().orElse(null);
+        if (uuidStringEntry == null)
+        {
+            return null;
+        }
+        return uuidStringEntry.getKey();
+    }
+}

src/main/java/dev/plex/futura/bot/listener/LinkingListener.java

@@ -0,0 +1,32 @@
+package dev.plex.futura.bot.listener;
+
+import dev.plex.futura.Futura;
+import net.dv8tion.jda.api.entities.channel.ChannelType;
+import net.dv8tion.jda.api.events.message.MessageReceivedEvent;
+import net.dv8tion.jda.api.hooks.ListenerAdapter;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.UUID;
+
+/**
+ * @author Taah
+ * @since 7:05 PM [02-08-2024]
+ */
+public class LinkingListener extends ListenerAdapter
+{
+    @Override
+    public void onMessageReceived(@NotNull MessageReceivedEvent event)
+    {
+        if (event.getAuthor().isBot()) return;
+        if (event.getChannelType() != ChannelType.PRIVATE) return;
+        final String messageContent = event.getMessage().getContentRaw().toLowerCase();
+        final UUID uuid = Futura.plugin().linkingManager().matchCode(messageContent);
+        if (uuid == null)
+        {
+            // Invalid Code
+            return;
+        }
+
+        //TODO: Code was valid, link user, store user in cache and future database
+    }
+}

src/main/resources/config.yml

@@ -9,6 +9,8 @@ discord:
   #
   linking:
     enabled: false
+    # Time in seconds the code will be valid for until it expires and a new one will have to be requested for
+    expirationTime: 60
     # You can leave this blank for no role to be given on linking
     role: ""
   # Roles sync if LuckPerms is on the server only
@@ -18,3 +20,13 @@ discord:
   #   luckpermsGroupName: "discordRoleId"
   roles:
     sync: false
+
+  database:
+    # sqlite, mysql
+    type: sqlite
+    auth:
+      user: ""
+      password: ""
+      host: ""
+      port: 3306
+      database: ""

src/main/resources/messages.yml

@@ -5,4 +5,9 @@ joinServer: "**%player% has joined the server!"
 leftServer: "**%player% has left the server!"
 
 serverOffline: ":octagonal_sign: **Server is now offline!**"
-serverOnline: ":white_check_mark: **Server is now online!**"
+serverOnline: ":white_check_mark: **Server is now online!**"
+
+
+linkingDisabled: "<red>Discord to Minecraft account linking is currently disabled."
+accountLinkingInProgress: "<red>Can't request a new code currently, user has already requested a code. Please try again in a minute."
+codeRequested: "<green>The code you have requested is %code%. Please do not share this. In order to link your account, message the %bot-name% bot with your code. This code will expire in %expiration-time% seconds."