Allow PlotRateEvent to be cancelled. Fixes #2017

Bukkit/src/main/java/com/plotsquared/bukkit/events/PlotRateEvent.java

@@ -3,13 +3,15 @@ package com.plotsquared.bukkit.events;
 import com.intellectualcrafters.plot.object.Plot;
 import com.intellectualcrafters.plot.object.PlotPlayer;
 import com.intellectualcrafters.plot.object.Rating;
+import org.bukkit.event.Cancellable;
 import org.bukkit.event.HandlerList;
 
-public class PlotRateEvent extends PlotEvent {
+public class PlotRateEvent extends PlotEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
     private final PlotPlayer rater;
     private Rating rating;
+    private boolean cancelled = false;
 
     public PlotRateEvent(PlotPlayer rater, Rating rating, Plot plot) {
         super(plot);
@@ -38,4 +40,13 @@ public class PlotRateEvent extends PlotEvent {
         return handlers;
     }
 
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
 }

Bukkit/src/main/java/com/plotsquared/bukkit/util/BukkitEventUtil.java

@@ -31,6 +31,7 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.Cancellable;
 import org.bukkit.event.Event;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -124,10 +125,13 @@ public class BukkitEventUtil extends EventUtil {
     }
 
     @Override
+    @Nullable
     public Rating callRating(PlotPlayer player, Plot plot, Rating rating) {
         PlotRateEvent event = new PlotRateEvent(player, rating, plot);
         Bukkit.getServer().getPluginManager().callEvent(event);
+        if (event.isCancelled()) {
+            return null;
+        }
         return event.getRating();
     }
-
 }

Core/src/main/java/com/intellectualcrafters/plot/commands/Rate.java

@@ -122,12 +122,15 @@ public class Rate extends SubCommand {
                             if (index.getValue() >= Settings.Ratings.CATEGORIES.size()) {
                                 int rV = rating.getValue();
                                 Rating result = EventUtil.manager.callRating(this.player, plot, new Rating(rV));
+                                if (result != null) {
                                     plot.addRating(this.player.getUUID(), result);
                                     sendMessage(this.player, C.RATING_APPLIED, plot.getId().toString());
                                     if (Permissions.hasPermission(this.player, C.PERMISSION_COMMENT)) {
                                         Command command = MainCommand.getInstance().getCommand(Comment.class);
                                         if (command != null) {
-                                        MainUtil.sendMessage(this.player, C.COMMENT_THIS, command.getUsage());
+                                            MainUtil.sendMessage(this.player, C.COMMENT_THIS,
+                                                command.getUsage());
+                                        }
                                     }
                                 }
                                 return false;
@@ -189,9 +192,11 @@ public class Rate extends SubCommand {
                     return;
                 }
                 Rating result = EventUtil.manager.callRating(player, plot, new Rating(rating));
+                if (result != null) {
                     plot.addRating(uuid, result);
                     sendMessage(player, C.RATING_APPLIED, plot.getId().toString());
                 }
+            }
         };
         if (plot.getSettings().ratings == null) {
             if (!Settings.Enabled_Components.RATING_CACHE) {

Core/src/main/java/com/intellectualcrafters/plot/util/EventUtil.java

@@ -18,6 +18,7 @@ import com.intellectualcrafters.plot.object.Rating;
 import com.intellectualcrafters.plot.util.expiry.ExpireManager;
 import com.plotsquared.listener.PlayerBlockEventType;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.UUID;
@@ -26,6 +27,14 @@ public abstract class EventUtil {
 
     public static EventUtil manager = null;
 
+    /**
+     * Submit a plot rate event and return the updated rating
+     * @param player Player that rated the plot
+     * @param plot Plot that was rated
+     * @param rating Rating given to the plot
+     * @return Updated rating or null if the event was cancelled
+     */
+    @Nullable
     public abstract Rating callRating(PlotPlayer player, Plot plot, Rating rating);
 
     public abstract boolean callClaim(PlotPlayer player, Plot plot, boolean auto);

Nukkit/src/main/java/com/plotsquared/nukkit/events/PlotRateEvent.java

@@ -1,15 +1,17 @@
 package com.plotsquared.nukkit.events;
 
+import cn.nukkit.event.Cancellable;
 import cn.nukkit.event.HandlerList;
 import com.intellectualcrafters.plot.object.Plot;
 import com.intellectualcrafters.plot.object.PlotPlayer;
 import com.intellectualcrafters.plot.object.Rating;
 
-public class PlotRateEvent extends PlotEvent {
+public class PlotRateEvent extends PlotEvent implements Cancellable {
 
     private static final HandlerList handlers = new HandlerList();
     private final PlotPlayer rater;
     private Rating rating;
+    private boolean cancelled = false;
 
     public PlotRateEvent(PlotPlayer rater, Rating rating, Plot plot) {
         super(plot);
@@ -33,4 +35,11 @@ public class PlotRateEvent extends PlotEvent {
         this.rating = rating;
     }
 
+    @Override public void setCancelled(boolean cancelled) {
+        this.cancelled = cancelled;
+    }
+
+    @Override public boolean isCancelled() {
+        return this.cancelled;
+    }
 }

Nukkit/src/main/java/com/plotsquared/nukkit/util/NukkitEventUtil.java

@@ -30,6 +30,8 @@ import com.plotsquared.nukkit.events.PlotMergeEvent;
 import com.plotsquared.nukkit.events.PlotRateEvent;
 import com.plotsquared.nukkit.events.PlotUnlinkEvent;
 import com.plotsquared.nukkit.object.NukkitPlayer;
+
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -129,9 +131,13 @@ public class NukkitEventUtil extends EventUtil {
     }
 
     @Override
+    @Nullable
     public Rating callRating(PlotPlayer player, Plot plot, Rating rating) {
         PlotRateEvent event = new PlotRateEvent(player, rating, plot);
         plugin.getServer().getPluginManager().callEvent(event);
+        if (event.isCancelled()) {
+            return null;
+        }
         return event.getRating();
     }
 

Sponge/src/main/java/com/plotsquared/sponge/events/PlotRateEvent.java

@@ -3,10 +3,13 @@ package com.plotsquared.sponge.events;
 import com.intellectualcrafters.plot.object.Plot;
 import com.intellectualcrafters.plot.object.PlotPlayer;
 import com.intellectualcrafters.plot.object.Rating;
+import org.spongepowered.api.event.Cancellable;
+
+public class PlotRateEvent extends PlotEvent implements Cancellable {
 
-public class PlotRateEvent extends PlotEvent {
     private final PlotPlayer rater;
     private Rating rating;
+    private boolean cancelled = false;
 
     public PlotRateEvent(final PlotPlayer rater, final Rating rating, final Plot plot) {
         super(plot);
@@ -25,4 +28,14 @@ public class PlotRateEvent extends PlotEvent {
     public Rating getRating() {
         return rating;
     }
+
+    @Override
+    public boolean isCancelled() {
+        return this.cancelled;
+    }
+
+    @Override
+    public void setCancelled(boolean cancel) {
+        this.cancelled = cancel;
+    }
 }

Sponge/src/main/java/com/plotsquared/sponge/util/SpongeEventUtil.java

@@ -29,6 +29,7 @@ import com.plotsquared.sponge.events.PlotUnlinkEvent;
 import org.spongepowered.api.event.Event;
 import org.spongepowered.api.event.EventManager;
 
+import javax.annotation.Nullable;
 import java.util.ArrayList;
 import java.util.UUID;
 
@@ -120,9 +121,13 @@ public class SpongeEventUtil extends EventUtil {
     }
     
     @Override
+    @Nullable
     public Rating callRating(PlotPlayer player, Plot plot, Rating rating) {
         PlotRateEvent event = new PlotRateEvent(player, rating, plot);
         this.events.post(event);
+        if (event.isCancelled()) {
+            return null;
+        }
         return event.getRating();
     }