Better purging

pom.xml

@@ -73,10 +73,10 @@
         <postgresql.version>42.2.18</postgresql.version>
         <hikaricp.version>5.0.1</hikaricp.version>
         <!-- More visible way to change dependency versions -->
-        <spigot.version>1.20.5-R0.1-SNAPSHOT</spigot.version>
+        <spigot.version>1.21.3-R0.1-SNAPSHOT</spigot.version>
         <!-- Might differ from the last Spigot release for short periods 
             of time -->
-        <paper.version>1.20.6-R0.1-SNAPSHOT</paper.version>
+        <paper.version>1.21.1-R0.1-SNAPSHOT</paper.version>
         <bstats.version>3.0.0</bstats.version>
         <vault.version>1.7.1</vault.version>
         <placeholderapi.version>2.10.9</placeholderapi.version>

src/main/java/world/bentobox/bentobox/BentoBox.java

@@ -207,6 +207,7 @@ private void completeSetup(long loadTime) {
         registerListeners();
 
         // Load islands from database - need to wait until all the worlds are loaded
+        log("Loading islands from database...");
         try {
             islandsManager.load();
         } catch (Exception e) {

src/main/java/world/bentobox/bentobox/api/commands/admin/purge/AdminPurgeCommand.java

@@ -5,6 +5,8 @@
 import java.util.Iterator;
 import java.util.List;
 import java.util.Set;
+import java.util.UUID;
+import java.util.concurrent.CompletableFuture;
 
 import org.bukkit.Bukkit;
 import org.bukkit.event.EventHandler;
@@ -21,8 +23,10 @@
 
 public class AdminPurgeCommand extends CompositeCommand implements Listener {
 
+    private static final Long YEAR2000 = 946713600L;
     private int count;
     private boolean inPurge;
+    private boolean scanning;
     private boolean toBeConfirmed;
     private Iterator<String> it;
     private User user;
@@ -47,6 +51,10 @@ public void setup() {
 
     @Override
     public boolean canExecute(User user, String label, List<String> args) {
+        if (scanning) {
+            user.sendMessage("commands.admin.purge.scanning-in-progress");
+            return false;
+        }
         if (inPurge) {
             user.sendMessage("commands.admin.purge.purge-in-progress", TextVariables.LABEL, this.getTopLabel());
             return false;
@@ -75,13 +83,21 @@ public boolean execute(User user, String label, List<String> args) {
                 user.sendMessage("commands.admin.purge.days-one-or-more");
                 return false;
             }
-            islands = getOldIslands(days);
-            user.sendMessage("commands.admin.purge.purgable-islands", TextVariables.NUMBER, String.valueOf(islands.size()));
-            if (!islands.isEmpty()) {
-                toBeConfirmed = true;
-                user.sendMessage("commands.admin.purge.confirm", TextVariables.LABEL, this.getTopLabel());
-                return false;
-            }
+            user.sendMessage("commands.admin.purge.scanning");
+            scanning = true;
+            getOldIslands(days).thenAccept(islandSet -> {
+                user.sendMessage("commands.admin.purge.purgable-islands", TextVariables.NUMBER,
+                        String.valueOf(islandSet.size()));
+                if (!islandSet.isEmpty()) {
+                    toBeConfirmed = true;
+                    user.sendMessage("commands.admin.purge.confirm", TextVariables.LABEL, this.getTopLabel());
+                    islands = islandSet;
+                } else {
+                    user.sendMessage("commands.admin.purge.none-found");
+                }
+                scanning = false;
+            });
+
         } catch (NumberFormatException e) {
             user.sendMessage("commands.admin.purge.number-error");
             return false;
@@ -125,40 +141,61 @@ void onIslandDeleted(IslandDeletedEvent e) {
      * @param days days
      * @return set of islands
      */
-    Set<String> getOldIslands(int days) {
-        long currentTimeMillis = System.currentTimeMillis();
-        long daysInMilliseconds = (long) days * 1000 * 3600 * 24;
-        Set<String> oldIslands = new HashSet<>();
-
+    CompletableFuture<Set<String>> getOldIslands(int days) {
+        CompletableFuture<Set<String>> result = new CompletableFuture<>();
         // Process islands in one pass, logging and adding to the set if applicable
-        getPlugin().getIslands().getIslands().stream()
+        getPlugin().getIslands().getIslandsASync().thenAccept(list -> {
+            user.sendMessage("commands.admin.purge.total-islands", TextVariables.NUMBER, String.valueOf(list.size()));
+            Set<String> oldIslands = new HashSet<>();
+            list.stream()
                 .filter(i -> !i.isSpawn()).filter(i -> !i.getPurgeProtected())
                 .filter(i -> i.getWorld() != null) // to handle currently unloaded world islands
-                .filter(i -> i.getWorld().equals(this.getWorld())).filter(Island::isOwned).filter(
-                        i -> i.getMemberSet().stream()
-                                .allMatch(member -> (currentTimeMillis
-                                        - Bukkit.getOfflinePlayer(member).getLastPlayed()) > daysInMilliseconds))
+                    .filter(i -> i.getWorld().equals(this.getWorld())) // Island needs to be in this world
+                    .filter(Island::isOwned) // The island needs to be owned
+                    .filter(i -> i.getMemberSet().stream().allMatch(member -> checkLastLoginTimestamp(days, member)))
                 .forEach(i -> {
                     // Add the unique island ID to the set
                     oldIslands.add(i.getUniqueId());
-                    BentoBox.getInstance().log("Will purge island at " + Util.xyz(i.getCenter().toVector()) + " in "
+                    getPlugin().log("Will purge island at " + Util.xyz(i.getCenter().toVector()) + " in "
                             + i.getWorld().getName());
                     // Log each member's last login information
                     i.getMemberSet().forEach(member -> {
-                        Date lastLogin = new Date(Bukkit.getOfflinePlayer(member).getLastPlayed());
+                            Long timestamp = getPlayers().getLastLoginTimestamp(member);
+                            Date lastLogin = new Date(timestamp);
                         BentoBox.getInstance()
                                 .log("Player " + BentoBox.getInstance().getPlayers().getName(member)
                                         + " last logged in "
-                                        + (int) ((currentTimeMillis - Bukkit.getOfflinePlayer(member).getLastPlayed())
-                                                / 1000 / 3600 / 24)
+                                            + (int) ((System.currentTimeMillis() - timestamp) / 1000 / 3600 / 24)
                                         + " days ago. " + lastLogin);
                     });
                     BentoBox.getInstance().log("+-----------------------------------------+");
                 });
+            result.complete(oldIslands);
+        });
+        return result;
+    }
 
-        return oldIslands;
+    private boolean checkLastLoginTimestamp(int days, UUID member) {
+        long daysInMilliseconds = days * 24L * 3600 * 1000; // Calculate days in milliseconds
+        Long lastLoginTimestamp = getPlayers().getLastLoginTimestamp(member);
+        // If no valid last login time is found or it's before the year 2000, try to fetch from Bukkit
+        if (lastLoginTimestamp == null || lastLoginTimestamp < YEAR2000) {
+            lastLoginTimestamp = Bukkit.getOfflinePlayer(member).getLastPlayed();
+
+            // If still invalid, set the current timestamp to mark the user for eventual purging
+            if (lastLoginTimestamp < YEAR2000) {
+                getPlayers().setLoginTimeStamp(member, System.currentTimeMillis());
+                return false; // User will be purged in the future
+            } else {
+                // Otherwise, update the last login timestamp with the valid value from Bukkit
+                getPlayers().setLoginTimeStamp(member, lastLoginTimestamp);
+            }
+        }
+        // Check if the difference between now and the last login is greater than the allowed days
+        return System.currentTimeMillis() - lastLoginTimestamp > daysInMilliseconds;
     }
 
+
     /**
      * @return the inPurge
      */

src/main/java/world/bentobox/bentobox/database/AbstractDatabaseHandler.java

@@ -134,10 +134,31 @@ protected AbstractDatabaseHandler() {}
     @Nullable
     public abstract T loadObject(@NonNull String uniqueId) throws InstantiationException, IllegalAccessException, InvocationTargetException, ClassNotFoundException, IntrospectionException, NoSuchMethodException;
 
+    /**
+     * Loads all the records in this table and returns a list of them async
+     * @return CompletableFuture List of <T>
+     * @since 2.7.0
+     */
+    public CompletableFuture<List<T>> loadObjectsASync() {
+        CompletableFuture<List<T>> completableFuture = new CompletableFuture<>();
+
+        Bukkit.getScheduler().runTaskAsynchronously(BentoBox.getInstance(), () -> {
+            try {
+                completableFuture.complete(loadObjects()); // Complete the future with the result
+            } catch (Exception e) {
+                completableFuture.completeExceptionally(e); // Complete exceptionally if an error occurs
+                plugin.logError("Failed to load objects asynchronously: " + e.getMessage());
+            }
+        });
+
+        return completableFuture;
+    }
+
     /**
      * Save T into the corresponding database
      *
      * @param instance that should be inserted into the database
+     * @return completable future that is true if saved
      */
     public abstract CompletableFuture<Boolean> saveObject(T instance) throws IllegalAccessException, InvocationTargetException, IntrospectionException ;
 

src/main/java/world/bentobox/bentobox/database/Database.java

@@ -166,6 +166,13 @@ public static Set<Class<? extends DataObject>> getDataobjects() {
         return dataObjects;
     }
 
+    /**
+     * Load all objects async
+     * @return CompletableFuture<List<T>>
+     */
+    public @NonNull CompletableFuture<List<T>> loadObjectsASync() {
+        return handler.loadObjectsASync();
+    }
 
 
 }

src/main/java/world/bentobox/bentobox/database/objects/Island.java

@@ -19,6 +19,7 @@
 import org.bukkit.Bukkit;
 import org.bukkit.GameMode;
 import org.bukkit.Location;
+import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.World.Environment;
 import org.bukkit.entity.Player;
@@ -1512,7 +1513,7 @@ public void setGameMode(String gameMode) {
      */
     public boolean hasNetherIsland() {
         World nether = BentoBox.getInstance().getIWM().getNetherWorld(getWorld());
-        return nether != null && !getCenter().toVector().toLocation(nether).getBlock().getType().isAir();
+        return nether != null && (getCenter().toVector().toLocation(nether).getBlock().getType() != Material.AIR);
     }
 
     /**
@@ -1536,7 +1537,7 @@ public boolean isNetherIslandEnabled() {
      */
     public boolean hasEndIsland() {
         World end = BentoBox.getInstance().getIWM().getEndWorld(getWorld());
-        return end != null && !getCenter().toVector().toLocation(end).getBlock().getType().isAir();
+        return end != null && (getCenter().toVector().toLocation(end).getBlock().getType() != Material.AIR);
     }
 
     /**

src/main/java/world/bentobox/bentobox/database/objects/Players.java

@@ -10,6 +10,7 @@
 import org.bukkit.Bukkit;
 import org.bukkit.World;
 import org.bukkit.entity.Player;
+import org.eclipse.jdt.annotation.Nullable;
 
 import com.google.gson.annotations.Expose;
 
@@ -37,6 +38,8 @@ public class Players implements DataObject, MetaDataAble {
     private String locale = "";
     @Expose
     private Map<String, Integer> deaths = new HashMap<>();
+    @Expose
+    private Long lastLogin;
 
     /**
      * This variable stores set of worlds where user inventory must be cleared.
@@ -292,5 +295,20 @@ public void setMetaData(Map<String, MetaDataValue> metaData) {
         this.metaData = metaData;
     }
 
+    /**
+     * @return the lastLogin, Unix timestamp, or null if never logged in since this was tracked
+     * @since 2.6.0
+     */
+    @Nullable
+    public Long getLastLogin() {
+        return lastLogin;
+    }
+
+    /**
+     * @param lastLogin the lastLogin to set
+     */
+    public void setLastLogin(Long lastLogin) {
+        this.lastLogin = lastLogin;
+    }
 
 }

src/main/java/world/bentobox/bentobox/listeners/JoinLeaveListener.java

@@ -64,6 +64,9 @@ public void onPlayerJoin(final PlayerJoinEvent event) {
         // don't exist
         players.getPlayer(playerUUID);
 
+        // Set the login
+        players.setLoginTimeStamp(user);
+
         // Reset island resets if required
         plugin.getIWM().getOverWorlds().stream()
                 .filter(w -> event.getPlayer().getLastPlayed() < plugin.getIWM().getResetEpoch(w))

src/main/java/world/bentobox/bentobox/managers/IslandsManager.java

@@ -458,6 +458,16 @@ public Collection<Island> getIslands() {
         return handler.loadObjects().stream().toList();
     }
 
+    /**
+     * Loads all existing islands from the database without caching async
+     * 
+     * @return CompletableFuture<List> of every island
+     * @since 2.7.0
+     */
+    public CompletableFuture<List<Island>> getIslandsASync() {
+        return handler.loadObjectsASync();
+    }
+
     /**
      * Returns an <strong>unmodifiable collection</strong> of all the islands (even
      * those who may be unowned) in the specified world.

src/main/java/world/bentobox/bentobox/managers/PlayersManager.java

@@ -420,4 +420,44 @@ public CompletableFuture<Boolean> savePlayer(UUID uuid) {
         return CompletableFuture.completedFuture(false);
     }
 
+    /**
+     * Records when the user last logged in. Called by the joinleave listener
+     * @param user user
+     * @since 2.7.0
+     */
+    public void setLoginTimeStamp(User user) {
+        if (user.isPlayer() && user.isOnline()) {
+            setLoginTimeStamp(user.getUniqueId(), System.currentTimeMillis());
+        }
+    }
+
+    /**
+     * Set the player's last login time to a timestamp
+     * @param playerUUID player UUID
+     * @param timestamp timestamp to set
+     * @since 2.7.0
+     */
+    public void setLoginTimeStamp(UUID playerUUID, long timestamp) {
+        Players p = this.getPlayer(playerUUID);
+        if (p != null) {
+            p.setLastLogin(timestamp);
+            this.savePlayer(playerUUID);
+        }
+    }
+
+    /**
+     * Get the last login time stamp for this player
+     * @param uuid player's UUID
+     * @return timestamp or null if unknown or not recorded yet
+     * @since 2.7.0
+     */
+    @Nullable
+    public Long getLastLoginTimestamp(UUID uuid) {
+        Players p = this.getPlayer(uuid);
+        if (p != null) {
+            return p.getLastLogin();
+        }
+        return null;
+    }
+
 }

src/main/java/world/bentobox/bentobox/nms/v1_21_2_R0_1_SNAPSHOT/PasteHandlerImpl.java

@@ -0,0 +1,8 @@
+package world.bentobox.bentobox.nms.v1_21_2_R0_1_SNAPSHOT;
+
+/**
+ * Same as 1.21
+ */
+public class PasteHandlerImpl extends world.bentobox.bentobox.nms.v1_21_R0_1_SNAPSHOT.PasteHandlerImpl {
+    // Do nothing special
+}

src/main/java/world/bentobox/bentobox/nms/v1_21_2_R0_1_SNAPSHOT/WorldRegeneratorImpl.java

@@ -0,0 +1,8 @@
+package world.bentobox.bentobox.nms.v1_21_2_R0_1_SNAPSHOT;
+
+/**
+ * Same as 1.21
+ */
+public class WorldRegeneratorImpl extends world.bentobox.bentobox.nms.v1_21_R0_1_SNAPSHOT.WorldRegeneratorImpl {
+    // Do nothing special
+    }

src/main/resources/locales/en-US.yml

@@ -98,6 +98,10 @@ commands:
       purgable-islands: '&a Found &b [number] &a purgable islands.'
       purge-in-progress: '&c Purging in progress. Use &b /[label] purge stop &c to
         cancel.'
+      scanning: '&a Scanning islands in the database. This may take a while depending on how many you have...'
+      scanning-in-progress: '&c Scanning in progress, please wait'
+      none-found: '&c No islands found to purge.'
+      total-islands: '&a You have [number] islands in your database in all worlds.'
       number-error: '&c Argument must be a number of days'
       confirm: '&d Type &b /[label] purge confirm &d to start purging'
       completed: '&a Purging stopped.'

src/test/java/world/bentobox/bentobox/AbstractCommonSetup.java

@@ -298,13 +298,14 @@ public void checkSpigotMessage(String expectedMessage, int expectedOccurrences)
      */
     public EntityExplodeEvent getExplodeEvent(Entity entity, Location l, List<Block> list) {
         //return new EntityExplodeEvent(entity, l, list, 0, null);
-        return new EntityExplodeEvent(entity, l, list, 0);
+        return new EntityExplodeEvent(entity, l, list, 0, null);
     }
 
     public PlayerDeathEvent getPlayerDeathEvent(Player player, List<ItemStack> drops, int droppedExp, int newExp,
             int newTotalExp, int newLevel, @Nullable String deathMessage) {
-        //return new PlayerDeathEvent(player, null, drops, droppedExp, newExp, newTotalExp, newLevel, deathMessage);
-        return new PlayerDeathEvent(player, drops, droppedExp, newExp, newTotalExp, newLevel, deathMessage);
+        //Technically this null is not allowed, but it works right now
+        return new PlayerDeathEvent(player, null, drops, droppedExp, newExp,
+                newTotalExp, newLevel, deathMessage);
     }
 
 }