Calendar is now fixed. Credits to ItsGiuseppe.

src/main/java/com/eu/habbo/habbohotel/catalog/CalendarRewardObject.java

@@ -1,30 +1,32 @@
 package com.eu.habbo.habbohotel.catalog;
 
 import com.eu.habbo.Emulator;
+import com.eu.habbo.habbohotel.items.Item;
 import com.eu.habbo.habbohotel.users.Habbo;
+import com.eu.habbo.habbohotel.users.HabboItem;
+import com.eu.habbo.messages.outgoing.inventory.AddHabboItemComposer;
+import com.eu.habbo.messages.outgoing.inventory.InventoryRefreshComposer;
 
 import java.sql.ResultSet;
 import java.sql.SQLException;
 
 public class CalendarRewardObject {
     private final int id;
-    private final String name;
     private final String customImage;
     private final int credits;
     private final int points;
     private final int pointsType;
     private final String badge;
-    private final int catalogItemId;
+    private final int itemId;
 
     public CalendarRewardObject(ResultSet set) throws SQLException {
         this.id = set.getInt("id");
-        this.name = set.getString("name");
         this.customImage = set.getString("custom_image");
         this.credits = set.getInt("credits");
         this.points = set.getInt("points");
         this.pointsType = set.getInt("points_type");
         this.badge = set.getString("badge");
-        this.catalogItemId = set.getInt("catalog_item_id");
+        this.itemId = set.getInt("item_id");
     }
 
     public void give(Habbo habbo) {
@@ -40,11 +42,19 @@ public class CalendarRewardObject {
             habbo.addBadge(this.badge);
         }
 
-        if (this.catalogItemId > 0) {
+        if (this.itemId > 0) {
-            CatalogItem item = this.getCatalogItem();
+            Item item = getItem();
 
             if (item != null) {
-                Emulator.getGameEnvironment().getCatalogManager().purchaseItem(null, item, habbo, 1, "", true);
+                HabboItem habboItem = Emulator.getGameEnvironment().getItemManager().createItem(
+                        habbo.getHabboInfo().getId(),
+                        item,
+                        0,
+                        0,
+                        "");
+                habbo.getInventory().getItemsComponent().addItem(habboItem);
+                habbo.getClient().sendResponse(new AddHabboItemComposer(habboItem));
+                habbo.getClient().sendResponse(new InventoryRefreshComposer());
             }
         }
     }
@@ -53,10 +63,6 @@ public class CalendarRewardObject {
         return this.id;
     }
 
-    public String getName() {
-        return this.name;
-    }
-
     public String getCustomImage() {
         return this.customImage;
     }
@@ -77,7 +83,7 @@ public class CalendarRewardObject {
         return this.badge;
     }
 
-    public CatalogItem getCatalogItem() {
+    public Item getItem() {
-        return Emulator.getGameEnvironment().getCatalogManager().getCatalogItem(this.catalogItemId);
+        return Emulator.getGameEnvironment().getItemManager().getItem(this.itemId);
     }
 }

src/main/java/com/eu/habbo/habbohotel/catalog/CatalogManager.java

@@ -31,6 +31,7 @@ import com.eu.habbo.plugin.events.emulator.EmulatorLoadCatalogManagerEvent;
 import com.eu.habbo.plugin.events.users.catalog.UserCatalogFurnitureBoughtEvent;
 import com.eu.habbo.plugin.events.users.catalog.UserCatalogItemPurchasedEvent;
 import gnu.trove.TCollections;
+import gnu.trove.iterator.TIntIterator;
 import gnu.trove.iterator.TIntObjectIterator;
 import gnu.trove.map.TIntObjectMap;
 import gnu.trove.map.hash.THashMap;
@@ -1119,15 +1120,15 @@ public class CatalogManager {
         return offers;
     }
 
-    public void claimCalendarReward(Habbo habbo, int day) {
+    public void claimCalendarReward(Habbo habbo, int day, boolean force) {
         if (!habbo.getHabboStats().calendarRewardsClaimed.contains(day)) {
+            CalendarRewardObject object = this.calendarRewards.get((day+1));
+            int actualDay = (int) Math.floor((Emulator.getIntUnixTimestamp() - Emulator.getConfig().getInt("hotel.calendar.starttimestamp")) / 86400);
+            int diff = (actualDay - day);
+            if (((diff <= 2 && diff >= 0) || force) && object != null) {
                 habbo.getHabboStats().calendarRewardsClaimed.add(day);
-            CalendarRewardObject object = this.calendarRewards.get(day);
-
-            if (object != null) {
-                object.give(habbo);
-                habbo.getClient().sendResponse(new InventoryRefreshComposer());
                 habbo.getClient().sendResponse(new AdventCalendarProductComposer(true, object));
+                object.give(habbo);
 
                 try (Connection connection = Emulator.getDatabase().getDataSource().getConnection(); PreparedStatement statement = connection.prepareStatement("INSERT INTO calendar_rewards_claimed (user_id, reward_id, timestamp) VALUES (?, ?, ?)")) {
                     statement.setInt(1, habbo.getHabboInfo().getId());
@@ -1138,8 +1139,6 @@ public class CatalogManager {
                     Emulator.getLogging().logSQLException(e);
                 }
             }
-
-
         }
     }
 

src/main/java/com/eu/habbo/messages/incoming/events/calendar/AdventCalendarForceOpenEvent.java

@@ -1,5 +1,6 @@
 package com.eu.habbo.messages.incoming.events.calendar;
 
+import com.eu.habbo.Emulator;
 import com.eu.habbo.messages.incoming.MessageHandler;
 
 public class AdventCalendarForceOpenEvent extends MessageHandler {
@@ -7,5 +8,7 @@ public class AdventCalendarForceOpenEvent extends MessageHandler {
     public void handle() throws Exception {
         String campaign = this.packet.readString();
         int day = this.packet.readInt();
+
+        Emulator.getGameEnvironment().getCatalogManager().claimCalendarReward(this.client.getHabbo(), day, true);
     }
 }

src/main/java/com/eu/habbo/messages/incoming/events/calendar/AdventCalendarOpenDayEvent.java

@@ -9,6 +9,6 @@ public class AdventCalendarOpenDayEvent extends MessageHandler {
         String campaign = this.packet.readString();
         int day = this.packet.readInt();
 
-        Emulator.getGameEnvironment().getCatalogManager().claimCalendarReward(this.client.getHabbo(), day);
+        Emulator.getGameEnvironment().getCatalogManager().claimCalendarReward(this.client.getHabbo(), day, false);
     }
 }

src/main/java/com/eu/habbo/messages/outgoing/events/calendar/AdventCalendarDataComposer.java

@@ -28,33 +28,28 @@ public class AdventCalendarDataComposer extends MessageComposer {
         this.response.appendString("");
         this.response.appendInt(this.currentDay);
         this.response.appendInt(this.totalDays);
-
         this.response.appendInt(this.unlocked.size());
 
         TIntArrayList expired = new TIntArrayList();
         for (int i = 0; i < this.totalDays; i++) {
             expired.add(i);
-            expired.remove(this.currentDay);
         }
+        expired.remove(this.currentDay);
+        if(this.currentDay > 1) expired.remove(this.currentDay - 2);
+        if(this.currentDay > 0) expired.remove(this.currentDay - 1);
 
-        this.unlocked.forEach(new TIntProcedure() {
+        this.unlocked.forEach(value -> {
-            @Override
-            public boolean execute(int value) {
             AdventCalendarDataComposer.this.response.appendInt(value);
             expired.remove(value);
             return true;
-            }
         });
 
 
         if (this.lockExpired) {
             this.response.appendInt(expired.size());
-            expired.forEach(new TIntProcedure() {
+            expired.forEach(value -> {
-                @Override
-                public boolean execute(int value) {
                 AdventCalendarDataComposer.this.response.appendInt(value);
                 return true;
-                }
             });
         } else {
             this.response.appendInt(0);

src/main/java/com/eu/habbo/messages/outgoing/events/calendar/AdventCalendarProductComposer.java

@@ -1,6 +1,7 @@
 package com.eu.habbo.messages.outgoing.events.calendar;
 
 import com.eu.habbo.habbohotel.catalog.CalendarRewardObject;
+import com.eu.habbo.habbohotel.items.Item;
 import com.eu.habbo.messages.ServerMessage;
 import com.eu.habbo.messages.outgoing.MessageComposer;
 import com.eu.habbo.messages.outgoing.Outgoing;
@@ -18,9 +19,9 @@ public class AdventCalendarProductComposer extends MessageComposer {
     public ServerMessage compose() {
         this.response.init(Outgoing.AdventCalendarProductComposer);
         this.response.appendBoolean(this.visible);
-        this.response.appendString(this.rewardObject.getName());
+        this.response.appendString(this.rewardObject.getItem().getName());
         this.response.appendString(this.rewardObject.getCustomImage());
-        this.response.appendString(this.rewardObject.getCatalogItem() != null ? this.rewardObject.getCatalogItem().getName() : this.rewardObject.getName());
+        this.response.appendString(this.rewardObject.getItem().getName());
         return this.response;
     }
 }