Support for forced resource packs

src/main/java/net/minestom/server/entity/Player.java

@@ -1325,13 +1325,7 @@ public class Player extends LivingEntity implements CommandSender, Localizable,
      * @param resourcePack the resource pack
      */
     public void setResourcePack(@NotNull ResourcePack resourcePack) {
-        final String url = resourcePack.getUrl();
+        playerConnection.sendPacket(new ResourcePackSendPacket(resourcePack));
-        final String hash = resourcePack.getHash();
-
-        ResourcePackSendPacket resourcePackSendPacket = new ResourcePackSendPacket();
-        resourcePackSendPacket.url = url;
-        resourcePackSendPacket.hash = hash;
-        playerConnection.sendPacket(resourcePackSendPacket);
     }
 
     /**
@@ -2272,7 +2266,6 @@ public class Player extends LivingEntity implements CommandSender, Localizable,
      * @param allowFood true if food should be updated, false otherwise
      * @return the called {@link ItemUpdateStateEvent},
      * null if there is no item to update the state
-     *
      * @deprecated Use {@link #callItemUpdateStateEvent(Hand)} instead
      */
     @Deprecated

src/main/java/net/minestom/server/network/packet/server/play/ResourcePackSendPacket.java

@@ -3,6 +3,7 @@ package net.minestom.server.network.packet.server.play;
 import net.kyori.adventure.text.Component;
 import net.minestom.server.network.packet.server.ServerPacket;
 import net.minestom.server.network.packet.server.ServerPacketIdentifier;
+import net.minestom.server.resourcepack.ResourcePack;
 import net.minestom.server.utils.binary.BinaryReader;
 import net.minestom.server.utils.binary.BinaryWriter;
 import org.jetbrains.annotations.NotNull;
@@ -17,21 +18,32 @@ public class ResourcePackSendPacket implements ServerPacket {
     public ResourcePackSendPacket() {
     }
 
+    public ResourcePackSendPacket(@NotNull ResourcePack resourcePack) {
+        this.url = resourcePack.getUrl();
+        this.hash = resourcePack.getHash();
+        this.forced = resourcePack.isForced();
+        this.forcedMessage = resourcePack.getForcedMessage();
+    }
+
     @Override
     public void write(@NotNull BinaryWriter writer) {
         writer.writeSizedString(url);
         writer.writeSizedString(hash);
         writer.writeBoolean(forced);
+        if (forced) {
             writer.writeComponent(forcedMessage);
         }
+    }
 
     @Override
     public void read(@NotNull BinaryReader reader) {
         this.url = reader.readSizedString(Integer.MAX_VALUE);
         this.hash = reader.readSizedString(Integer.MAX_VALUE);
         this.forced = reader.readBoolean();
+        if (forced) {
             this.forcedMessage = reader.readComponent();
         }
+    }
 
     @Override
     public int getId() {

src/main/java/net/minestom/server/resourcepack/ResourcePack.java

@@ -1,5 +1,6 @@
 package net.minestom.server.resourcepack;
 
+import net.kyori.adventure.text.Component;
 import net.minestom.server.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.jetbrains.annotations.Nullable;
@@ -11,11 +12,31 @@ public class ResourcePack {
 
     private final String url;
     private final String hash;
+    private final boolean forced;
+    private final Component forcedMessage;
 
+    /**
+     * @deprecated use {@link ResourcePack#optional(String, String)}.
+     */
+    @Deprecated
     public ResourcePack(@NotNull String url, @Nullable String hash) {
+        this(url, hash, false, null);
+    }
+
+    private ResourcePack(@NotNull String url, @Nullable String hash, boolean forced, Component forcedMessage) {
         this.url = url;
         // Optional, set to empty if null
         this.hash = hash == null ? "" : hash;
+        this.forced = forced;
+        this.forcedMessage = forcedMessage;
+    }
+
+    public static ResourcePack optional(@NotNull String url, @Nullable String hash) {
+        return new ResourcePack(url, hash);
+    }
+
+    public static ResourcePack forced(@NotNull String url, @Nullable String hash, @NotNull Component forcedMessage) {
+        return new ResourcePack(url, hash, true, forcedMessage);
     }
 
     /**
@@ -23,8 +44,7 @@ public class ResourcePack {
      *
      * @return the resource pack URL
      */
-    @NotNull
+    public @NotNull String getUrl() {
-    public String getUrl() {
         return url;
     }
 
@@ -36,8 +56,15 @@ public class ResourcePack {
      *
      * @return the resource pack hash, can be empty
      */
-    @NotNull
+    public @NotNull String getHash() {
-    public String getHash() {
         return hash;
     }
+
+    public boolean isForced() {
+        return forced;
+    }
+
+    public @Nullable Component getForcedMessage() {
+        return forcedMessage;
+    }
 }