chore: add annotations to suppress IDE warnings

* Add location not null check
The issue lies within the equals implementation

* Fix setposition method with default value.
Also add a comment too.

---------

Co-authored-by: OneLiteFeather <seelenretterin@onelitefeather.net>

Bukkit/src/main/java/com/plotsquared/bukkit/util/fawe/FaweRegionManager.java

@@ -37,7 +37,9 @@ import com.sk89q.worldedit.regions.CuboidRegion;
 import com.sk89q.worldedit.world.biome.BiomeType;
 import org.checkerframework.checker.nullness.qual.NonNull;
 import org.checkerframework.checker.nullness.qual.Nullable;
+import org.jetbrains.annotations.NotNull;
 
+import java.util.Objects;
 import java.util.Set;
 
 public class FaweRegionManager extends BukkitRegionManager {
@@ -59,7 +61,10 @@ public class FaweRegionManager extends BukkitRegionManager {
             @Nullable PlotPlayer<?> actor,
             @Nullable QueueCoordinator queue
     ) {
-        return delegate.setCuboids(area, regions, blocks, minY, maxY, queue.getCompleteTask());
+        return delegate.setCuboids(
+                area, regions, blocks, minY, maxY,
+                Objects.requireNonNullElseGet(queue, area::getQueue).getCompleteTask()
+        );
     }
 
     @Override
@@ -111,7 +116,7 @@ public class FaweRegionManager extends BukkitRegionManager {
     }
 
     @Override
-    public boolean regenerateRegion(final Location pos1, final Location pos2, boolean ignore, final Runnable whenDone) {
+    public boolean regenerateRegion(final @NotNull Location pos1, final @NotNull Location pos2, boolean ignore, final Runnable whenDone) {
         return delegate.regenerateRegion(pos1, pos2, ignore, whenDone);
     }
 

Core/src/main/java/com/plotsquared/core/command/Buy.java

@@ -21,9 +21,8 @@ package com.plotsquared.core.command;
 import com.google.inject.Inject;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.caption.TranslatableCaption;
-import com.plotsquared.core.events.PlayerBuyPlotEvent;
+import com.plotsquared.core.events.PlotFlagRemoveEvent;
 import com.plotsquared.core.events.Result;
-import com.plotsquared.core.player.OfflinePlotPlayer;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -89,30 +88,22 @@ public class Buy extends Command {
                 TranslatableCaption.of("permission.cant_claim_more_plots"),
                 TagResolver.resolver("amount", Tag.inserting(Component.text(player.getAllowedPlots())))
         );
-        double priceFlag = plot.getFlag(PriceFlag.class);
+        double price = plot.getFlag(PriceFlag.class);
-        if (priceFlag <= 0) {
+        if (price <= 0) {
             throw new CommandException(TranslatableCaption.of("economy.not_for_sale"));
         }
         checkTrue(
                 this.econHandler.isSupported(),
                 TranslatableCaption.of("economy.vault_or_consumer_null")
         );
-
+        checkTrue(
-        PlayerBuyPlotEvent event = this.eventDispatcher.callPlayerBuyPlot(player, plot, priceFlag);
+                this.econHandler.getMoney(player) >= price,
-        if (event.getEventResult() == Result.DENY) {
-            throw new CommandException(TranslatableCaption.of("economy.cannot_buy_blocked"));
-        }
-
-        double price = event.getEventResult() == Result.FORCE ? 0 : event.price();
-        if (this.econHandler.getMoney(player) < price) {
-            throw new CommandException(
                 TranslatableCaption.of("economy.cannot_afford_plot"),
                 TagResolver.builder()
                         .tag("money", Tag.inserting(Component.text(this.econHandler.format(price))))
                         .tag("balance", Tag.inserting(Component.text(this.econHandler.format(this.econHandler.getMoney(player)))))
                         .build()
         );
-        }
         this.econHandler.withdrawMoney(player, price);
         // Failure
         // Success
@@ -122,8 +113,7 @@ public class Buy extends Command {
                     TagResolver.resolver("money", Tag.inserting(Component.text(this.econHandler.format(price))))
             );
 
-            OfflinePlotPlayer previousOwner = PlotSquared.platform().playerManager().getOfflinePlayer(plot.getOwnerAbs());
+            this.econHandler.depositMoney(PlotSquared.platform().playerManager().getOfflinePlayer(plot.getOwnerAbs()), price);
-            this.econHandler.depositMoney(previousOwner, price);
 
             PlotPlayer<?> owner = PlotSquared.platform().playerManager().getPlayerIfExists(plot.getOwnerAbs());
             if (owner != null) {
@@ -137,8 +127,9 @@ public class Buy extends Command {
                 );
             }
             PlotFlag<?, ?> plotFlag = plot.getFlagContainer().getFlag(PriceFlag.class);
-            if (this.eventDispatcher.callFlagRemove(plotFlag, plot).getEventResult() != Result.DENY) {
+            PlotFlagRemoveEvent event = this.eventDispatcher.callFlagRemove(plotFlag, plot);
-                plot.removeFlag(plotFlag);
+            if (event.getEventResult() != Result.DENY) {
+                plot.removeFlag(event.getFlag());
             }
             plot.setOwner(player.getUUID());
             plot.getPlotModificationManager().setSign(player.getName());
@@ -146,7 +137,6 @@ public class Buy extends Command {
                     TranslatableCaption.of("working.claimed"),
                     TagResolver.resolver("plot", Tag.inserting(Component.text(plot.getId().toString())))
             );
-            this.eventDispatcher.callPostPlayerBuyPlot(player, previousOwner, plot, price);
             whenDone.run(Buy.this, CommandResult.SUCCESS);
         }, () -> {
             this.econHandler.depositMoney(player, price);

Core/src/main/java/com/plotsquared/core/database/SQLManager.java

@@ -2401,7 +2401,8 @@ public class SQLManager implements AbstractDB {
         addPlotTask(plot, new UniqueStatement("setPosition") {
             @Override
             public void set(PreparedStatement statement) throws SQLException {
-                statement.setString(1, position == null ? "" : position);
+                // Please see the table creation statement. There is the default value of "default"
+                statement.setString(1, position == null ? "DEFAULT" : position);
                 statement.setInt(2, getId(plot));
             }
 

Core/src/main/java/com/plotsquared/core/events/CancellablePlotEvent.java

@@ -18,34 +18,17 @@
  */
 package com.plotsquared.core.events;
 
-
-import org.checkerframework.checker.nullness.qual.Nullable;
-
 /**
  * PlotSquared event with {@link Result} to cancel, force, or allow.
  */
 public interface CancellablePlotEvent {
 
-    /**
+    Result getEventResult();
-     * The currently set {@link Result} for this event (as set by potential previous event listeners).
-     *
-     * @return the current result.
-     */
-    @Nullable Result getEventResult();
 
-    /**
+    void setEventResult(Result eventResult);
-     * Set the {@link Result} for this event.
-     *
-     * @param eventResult the new result.
-     */
-    void setEventResult(@Nullable Result eventResult);
 
-    /**
-     * @deprecated No usage and not null-safe
-     */
-    @Deprecated(since = "TODO")
     default int getEventResultRaw() {
-        return getEventResult() != null ? getEventResult().getValue() : -1;
+        return getEventResult().getValue();
     }
 
 }

Core/src/main/java/com/plotsquared/core/events/PlayerBuyPlotEvent.java

@@ -1,88 +0,0 @@
-/*
- * PlotSquared, a land and world management plugin for Minecraft.
- * Copyright (C) IntellectualSites <https://intellectualsites.com>
- * Copyright (C) IntellectualSites team and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package com.plotsquared.core.events;
-
-import com.plotsquared.core.player.PlotPlayer;
-import com.plotsquared.core.plot.Plot;
-import org.checkerframework.checker.index.qual.NonNegative;
-import org.checkerframework.checker.nullness.qual.Nullable;
-
-/**
- * Called when a user attempts to buy a plot.
- * <p>
- * Setting the {@link #setEventResult(Result) Result} to {@link Result#FORCE} ignores the price and players account balance and does not charge the
- * player anything. {@link Result#DENY} blocks the purchase completely, {@link Result#ACCEPT} and {@code null} do not modify
- * the behaviour.
- * <p>
- * Setting the {@link #setPrice(double) price} to {@code 0} makes the plot practically free.
- *
- * @since TODO
- */
-public class PlayerBuyPlotEvent extends PlotPlayerEvent implements CancellablePlotEvent {
-
-    private Result result;
-    private double price;
-
-    public PlayerBuyPlotEvent(final PlotPlayer<?> plotPlayer, final Plot plot, @NonNegative final double price) {
-        super(plotPlayer, plot);
-        this.price = price;
-    }
-
-
-    /**
-     * Sets the price required to buy the plot.
-     *
-     * @param price the new price.
-     * @since TODO
-     */
-    public void setPrice(@NonNegative final double price) {
-        //noinspection ConstantValue - the annotation does not ensure a non-negative runtime value
-        if (price < 0) {
-            throw new IllegalArgumentException("price must be non-negative");
-        }
-        this.price = price;
-    }
-
-    /**
-     * Returns the currently set price required to buy the plot.
-     *
-     * @return the price.
-     * @since TODO
-     */
-    public @NonNegative double price() {
-        return price;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public void setEventResult(@Nullable final Result eventResult) {
-        this.result = eventResult;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    @Override
-    public @Nullable Result getEventResult() {
-        return this.result;
-    }
-
-}

Core/src/main/java/com/plotsquared/core/events/post/PostPlayerBuyPlotEvent.java

@@ -1,64 +0,0 @@
-/*
- * PlotSquared, a land and world management plugin for Minecraft.
- * Copyright (C) IntellectualSites <https://intellectualsites.com>
- * Copyright (C) IntellectualSites team and contributors
- *
- * This program is free software: you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation, either version 3 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program.  If not, see <https://www.gnu.org/licenses/>.
- */
-package com.plotsquared.core.events.post;
-
-import com.plotsquared.core.events.PlotPlayerEvent;
-import com.plotsquared.core.player.OfflinePlotPlayer;
-import com.plotsquared.core.player.PlotPlayer;
-import com.plotsquared.core.plot.Plot;
-import org.checkerframework.checker.index.qual.NonNegative;
-
-/**
- * Called after a player has successfully bought a plot.
- *
- * @since TODO
- */
-public class PostPlayerBuyPlotEvent extends PlotPlayerEvent {
-
-    private final OfflinePlotPlayer previousOwner;
-    private final double price;
-
-    public PostPlayerBuyPlotEvent(
-            final PlotPlayer<?> plotPlayer, final OfflinePlotPlayer previousOwner, final Plot plot,
-            @NonNegative final double price
-    ) {
-        super(plotPlayer, plot);
-        this.previousOwner = previousOwner;
-        this.price = price;
-    }
-
-    /**
-     * The previous owner of the bought plot.
-     *
-     * @return the previous owner.
-     */
-    public OfflinePlotPlayer previousOwner() {
-        return previousOwner;
-    }
-
-    /**
-     * Returns the price after potential modifications by {@link com.plotsquared.core.events.PlayerBuyPlotEvent}.
-     *
-     * @return the price the player had to pay to buy the plot.
-     */
-    public double price() {
-        return price;
-    }
-
-}

Core/src/main/java/com/plotsquared/core/plot/Plot.java

@@ -1483,7 +1483,7 @@ public class Plot {
      */
     public void setHome(BlockLoc location) {
         Plot plot = this.getBasePlot(false);
-        if (BlockLoc.ZERO.equals(location) || BlockLoc.MINY.equals(location)) {
+        if (location != null && (BlockLoc.ZERO.equals(location) || BlockLoc.MINY.equals(location))) {
             return;
         }
         plot.getSettings().setPosition(location);

Core/src/main/java/com/plotsquared/core/util/EventDispatcher.java

@@ -25,7 +25,6 @@ import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.configuration.caption.TranslatableCaption;
 import com.plotsquared.core.events.PlayerAutoPlotEvent;
 import com.plotsquared.core.events.PlayerAutoPlotsChosenEvent;
-import com.plotsquared.core.events.PlayerBuyPlotEvent;
 import com.plotsquared.core.events.PlayerClaimPlotEvent;
 import com.plotsquared.core.events.PlayerEnterPlotEvent;
 import com.plotsquared.core.events.PlayerLeavePlotEvent;
@@ -50,7 +49,6 @@ import com.plotsquared.core.events.PlotUnlinkEvent;
 import com.plotsquared.core.events.RemoveRoadEntityEvent;
 import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.events.post.PostPlayerAutoPlotEvent;
-import com.plotsquared.core.events.post.PostPlayerBuyPlotEvent;
 import com.plotsquared.core.events.post.PostPlotChangeOwnerEvent;
 import com.plotsquared.core.events.post.PostPlotDeleteEvent;
 import com.plotsquared.core.events.post.PostPlotMergeEvent;
@@ -59,7 +57,6 @@ import com.plotsquared.core.listener.PlayerBlockEventType;
 import com.plotsquared.core.location.Direction;
 import com.plotsquared.core.location.Location;
 import com.plotsquared.core.permissions.Permission;
-import com.plotsquared.core.player.OfflinePlotPlayer;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
@@ -318,17 +315,6 @@ public class EventDispatcher {
         return event;
     }
 
-    public PlayerBuyPlotEvent callPlayerBuyPlot(PlotPlayer<?> player, Plot plot, double price) {
-        PlayerBuyPlotEvent event = new PlayerBuyPlotEvent(player, plot, price);
-        eventBus.post(event);
-        return event;
-    }
-
-    public void callPostPlayerBuyPlot(PlotPlayer<?> player, OfflinePlotPlayer previousOwner, Plot plot,
-                                      double price) {
-        eventBus.post(new PostPlayerBuyPlotEvent(player, previousOwner, plot, price));
-    }
-
     public void doJoinTask(final PlotPlayer<?> player) {
         if (player == null) {
             return; //possible future warning message to figure out where we are retrieving null

Core/src/main/resources/lang/messages_en.json

@@ -125,7 +125,6 @@
   "economy.added_balance": "<prefix><gold><money> </gold><gray>has been added to your balance.</gray>",
   "economy.removed_balance": "<prefix><gold><money> </gold><gray>has been taken from your balance.</gray>",
   "economy.removed_granted_plot": "<prefix><gray>You used <used_grants> plot grant(s), you've got </gray><gold><remaining_grants></gold> <gray>left.</gray>",
-  "economy.cannot_buy_blocked":  "<prefix><red>You are not allowed to buy this plot.</red>",
   "setup.choose_generator": "<gold>What generator do you want?</gold>",
   "setup.setup_not_started": "<prefix><gold>No setup started.</gold>",
   "setup.setup_init": "<prefix><gold>Usage: </gold><gray>/plot setup <value></gray>",