Add service system and rewrite Auto to use the service system

Bukkit/build.gradle

@@ -115,6 +115,7 @@ shadowJar {
         include(dependency('org.slf4j:slf4j-api'))
         include(dependency('javax.inject:javax.inject:1'))
         include(dependency('aopalliance:aopalliance:1.0'))
+        include(dependency('com.intellectualsites:Pipeline:1.4.0-SNAPSHOT'))
     }
 
     relocate('net.kyori.text', 'com.plotsquared.formatting.text')

Core/build.gradle

@@ -23,6 +23,7 @@ dependencies {
     compile group: 'aopalliance', name: 'aopalliance', version: '1.0'
     // logging
     implementation("org.apache.logging.log4j:log4j-slf4j-impl:2.8.1")
+    implementation('com.intellectualsites:Pipeline:1.4.0-SNAPSHOT')
 }
 
 sourceCompatibility = 1.8

Core/src/main/java/com/plotsquared/core/PlotPlatform.java

@@ -28,6 +28,7 @@ package com.plotsquared.core;
 import com.google.inject.Injector;
 import com.google.inject.Key;
 import com.google.inject.TypeLiteral;
+import com.intellectualsites.services.ServicePipeline;
 import com.plotsquared.core.backup.BackupManager;
 import com.plotsquared.core.configuration.caption.LocaleHolder;
 import com.plotsquared.core.generator.GeneratorWrapper;
@@ -262,4 +263,13 @@ public interface PlotPlatform<P> extends LocaleHolder {
         return getInjector().getInstance(PermissionHandler.class);
     }
 
+    /**
+     * Get the {@link ServicePipeline} implementation
+     *
+     * @return Service pipeline
+     */
+    @Nonnull default ServicePipeline getServicePipeline() {
+        return getInjector().getInstance(ServicePipeline.class);
+    }
+
 }

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

@@ -25,8 +25,9 @@
  */
 package com.plotsquared.core.command;
 
-import com.google.common.collect.Lists;
+import com.google.common.reflect.TypeToken;
 import com.google.inject.Inject;
+import com.intellectualsites.services.ServicePipeline;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.Settings;
 import com.plotsquared.core.configuration.caption.TranslatableCaption;
@@ -34,7 +35,6 @@ import com.plotsquared.core.database.DBFunc;
 import com.plotsquared.core.events.PlayerAutoPlotEvent;
 import com.plotsquared.core.events.PlotAutoMergeEvent;
 import com.plotsquared.core.events.Result;
-import com.plotsquared.core.events.TeleportCause;
 import com.plotsquared.core.permissions.Permission;
 import com.plotsquared.core.permissions.PermissionHandler;
 import com.plotsquared.core.player.MetaDataAccess;
@@ -42,9 +42,8 @@ import com.plotsquared.core.player.PlayerMetaDataKeys;
 import com.plotsquared.core.player.PlotPlayer;
 import com.plotsquared.core.plot.Plot;
 import com.plotsquared.core.plot.PlotArea;
-import com.plotsquared.core.plot.PlotAreaType;
-import com.plotsquared.core.plot.PlotId;
 import com.plotsquared.core.plot.world.PlotAreaManager;
+import com.plotsquared.core.services.plots.AutoService;
 import com.plotsquared.core.util.EconHandler;
 import com.plotsquared.core.util.EventDispatcher;
 import com.plotsquared.core.util.Expression;
@@ -56,8 +55,10 @@ import net.kyori.adventure.text.minimessage.Template;
 
 import javax.annotation.Nonnull;
 import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.Iterator;
 import java.util.List;
-import java.util.Set;
+import java.util.stream.Collectors;
 
 @CommandDeclaration(command = "auto",
     permission = "plots.auto",
@@ -71,13 +72,23 @@ public class Auto extends SubCommand {
     private final PlotAreaManager plotAreaManager;
     private final EventDispatcher eventDispatcher;
     private final EconHandler econHandler;
+    private final ServicePipeline servicePipeline;
 
     @Inject public Auto(@Nonnull final PlotAreaManager plotAreaManager,
                         @Nonnull final EventDispatcher eventDispatcher,
-                        @Nullable final EconHandler econHandler) {
+                        @Nullable final EconHandler econHandler,
+                        @Nonnull final ServicePipeline servicePipeline) {
         this.plotAreaManager = plotAreaManager;
         this.eventDispatcher = eventDispatcher;
         this.econHandler = econHandler;
+        this.servicePipeline = servicePipeline;
+        this.servicePipeline.registerServiceType(TypeToken.of(AutoService.class), new AutoService.DefaultAutoService());
+        final AutoService.MultiPlotService multiPlotService = new AutoService.MultiPlotService();
+        this.servicePipeline.registerServiceImplementation(AutoService.class, multiPlotService,
+            Collections.singletonList(multiPlotService));
+        final AutoService.SinglePlotService singlePlotService = new AutoService.SinglePlotService();
+        this.servicePipeline.registerServiceImplementation(AutoService.class, singlePlotService,
+            Collections.singletonList(singlePlotService));
     }
 
     public static boolean checkAllowedPlots(PlotPlayer player, PlotArea plotarea,
@@ -123,62 +134,32 @@ public class Auto extends SubCommand {
         return true;
     }
 
-    /**
+    private void claimSingle(@Nonnull final PlotPlayer<?> player, @Nonnull final Plot plot,
-     * Teleport the player home, or claim a new plot
+        @Nonnull final PlotArea plotArea, @Nullable final String schematic) {
-     *
-     * @param player
-     * @param area
-     * @param start
-     * @param schematic
-     */
-    public static void homeOrAuto(final PlotPlayer player, final PlotArea area, PlotId start,
-        final String schematic) {
-        Set<Plot> plots = player.getPlots();
-        if (!plots.isEmpty()) {
-            plots.iterator().next().teleportPlayer(player, TeleportCause.COMMAND, result -> {
-            });
-        } else {
-            autoClaimSafe(player, area, start, schematic);
-        }
-    }
-
-    /**
-     * Claim a new plot for a player
-     *
-     * @param player
-     * @param area
-     * @param start
-     * @param schematic
-     */
-    public static void autoClaimSafe(final PlotPlayer<?> player, final PlotArea area, PlotId start,
-        final String schematic) {
         try (final MetaDataAccess<Boolean> metaDataAccess =
             player.accessTemporaryMetaData(PlayerMetaDataKeys.TEMPORARY_AUTO)) {
             metaDataAccess.set(true);
         }
-        autoClaimFromDatabase(player, area, start, new RunnableVal<Plot>() {
+        plot.setOwnerAbs(player.getUUID());
+
+        final RunnableVal<Plot> runnableVal = new RunnableVal<Plot>() {
+            {
+                this.value = plot;
+            }
+
             @Override public void run(final Plot plot) {
                 try {
-                    TaskManager.getPlatformImplementation().sync(new AutoClaimFinishTask(player, plot, area, schematic,
+                    TaskManager.getPlatformImplementation().sync(
+                        new AutoClaimFinishTask(player, plot, plotArea, schematic,
                             PlotSquared.get().getEventDispatcher()));
                 } catch (final Exception e) {
                     e.printStackTrace();
                 }
             }
-        });
+        };
-    }
+
+        DBFunc.createPlotSafe(plot, runnableVal, () -> claimSingle(player, plot, plotArea, schematic));
 
-    public static void autoClaimFromDatabase(final PlotPlayer player, final PlotArea area,
-        PlotId start, final RunnableVal<Plot> whenDone) {
-        final Plot plot = area.getNextFreePlot(player, start);
-        if (plot == null) {
-            whenDone.run(null);
-            return;
-        }
-        whenDone.value = plot;
-        plot.setOwnerAbs(player.getUUID());
-        DBFunc.createPlotSafe(plot, whenDone,
-            () -> autoClaimFromDatabase(player, area, plot.getId(), whenDone));
     }
 
     @Override public boolean onCommand(final PlotPlayer<?> player, String[] args) {
@@ -313,34 +294,24 @@ public class Auto extends SubCommand {
                 );
             }
         }
-        // TODO handle type 2 (partial) the same as normal worlds!
+
-        if (size_x == 1 && size_z == 1) {
+        final List<Plot> plots = this.servicePipeline
-            autoClaimSafe(player, plotarea, null, schematic);
+            .pump(new AutoService.AutoQuery(player, null, size_x, size_z, plotarea))
-            return true;
+            .through(AutoService.class)
-        } else {
+            .getResult();
-            if (plotarea.getType() == PlotAreaType.PARTIAL) {
+
+        if (plots.isEmpty()) {
             player.sendMessage(TranslatableCaption.of("errors.no_free_plots"));
             return false;
+        } else if (plots.size() == 1) {
+            this.claimSingle(player, plots.get(0), plotarea, schematic);
+        } else {
+            final Iterator<Plot> plotIterator = plots.iterator();
+            while (plotIterator.hasNext()) {
+                plotIterator.next().claim(player, !plotIterator.hasNext(), null);
             }
-            while (true) {
+            final PlotAutoMergeEvent mergeEvent = this.eventDispatcher.callAutoMerge(plots.get(0),
-                PlotId start = plotarea.getMeta("lastPlot", PlotId.of(0, 0)).getNextId();
+                plots.stream().map(Plot::getId).collect(Collectors.toList()));
-                PlotId end = PlotId.of(start.getX() + size_x - 1, start.getY() + size_z - 1);
-                if (plotarea.canClaim(player, start, end)) {
-                    plotarea.setMeta("lastPlot", start);
-
-                    for (final PlotId plotId : PlotId.PlotRangeIterator.range(start, end)) {
-                        final Plot plot = plotarea.getPlot(plotId);
-                        if (plot == null) {
-                            return false;
-                        }
-                        plot.claim(player, plotId.equals(end), null);
-                    }
-
-                    final List<PlotId> plotIds = Lists.newArrayList((Iterable<? extends PlotId>)
-                        PlotId.PlotRangeIterator.range(start, end));
-                    final PlotId pos1 = plotIds.get(0);
-                    final PlotAutoMergeEvent mergeEvent = this.eventDispatcher
-                        .callAutoMerge(plotarea.getPlotAbs(pos1), plotIds);
             if (!force && mergeEvent.getEventResult() == Result.DENY) {
                 player.sendMessage(
                     TranslatableCaption.of("events.event_denied"),
@@ -348,14 +319,8 @@ public class Auto extends SubCommand {
                 );
                 return false;
             }
-                    if (!plotarea.mergePlots(mergeEvent.getPlots(), true)) {
+            return plotarea.mergePlots(mergeEvent.getPlots(), true);
-                        return false;
-                    }
-                    break;
-                }
-                plotarea.setMeta("lastPlot", start);
         }
         return true;
     }
-    }
 }

Core/src/main/java/com/plotsquared/core/inject/modules/PlotSquaredModule.java

@@ -26,6 +26,7 @@
 package com.plotsquared.core.inject.modules;
 
 import com.google.inject.AbstractModule;
+import com.intellectualsites.services.ServicePipeline;
 import com.plotsquared.core.PlotSquared;
 import com.plotsquared.core.configuration.file.YamlConfiguration;
 import com.plotsquared.core.inject.annotations.BackgroundPipeline;
@@ -44,6 +45,7 @@ public class PlotSquaredModule extends AbstractModule {
 
     @Override protected void configure() {
         final PlotSquared plotSquared = PlotSquared.get();
+        bind(ServicePipeline.class).toInstance(ServicePipeline.builder().build());
         bind(YamlConfiguration.class).annotatedWith(WorldConfig.class).toInstance(plotSquared.getWorldConfiguration());
         bind(File.class).annotatedWith(WorldFile.class).toInstance(plotSquared.getWorldsFile());
         bind(File.class).annotatedWith(ConfigFile.class).toInstance(plotSquared.getConfigFile());

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

@@ -83,6 +83,7 @@ import java.util.Collection;
 import java.util.Collections;
 import java.util.HashMap;
 import java.util.HashSet;
+import java.util.LinkedList;
 import java.util.List;
 import java.util.Map;
 import java.util.Map.Entry;
@@ -908,31 +909,38 @@ public abstract class PlotArea {
         }
     }
 
-    public boolean canClaim(@Nullable final PlotPlayer player, @Nonnull final PlotId pos1,
+    @Nullable public List<Plot> canClaim(@Nullable final PlotPlayer player, @Nonnull final PlotId pos1,
         @Nonnull final PlotId pos2) {
         if (pos1.getX() == pos2.getX() && pos1.getY() == pos2.getY()) {
             if (getOwnedPlot(pos1) != null) {
-                return false;
+                return null;
             }
             final Plot plot = getPlotAbs(pos1);
             if (plot == null) {
-                return false;
+                return null;
             }
-            return plot.canClaim(player);
+            if (plot.canClaim(player)) {
+                return Collections.singletonList(plot);
+            } else {
+                return null;
             }
+        }
+        final List<Plot> plots = new LinkedList<>();
         for (int x = pos1.getX(); x <= pos2.getX(); x++) {
             for (int y = pos1.getY(); y <= pos2.getY(); y++) {
                 final PlotId id = PlotId.of(x, y);
                 final Plot plot = getPlotAbs(id);
                 if (plot == null) {
-                    return false;
+                    return null;
                 }
                 if (!plot.canClaim(player)) {
-                    return false;
+                    return null;
+                } else {
+                    plots.add(plot);
                 }
             }
         }
-        return true;
+        return plots;
     }
 
     public boolean removePlot(@Nonnull final PlotId id) {

Core/src/main/java/com/plotsquared/core/services/plots/AutoService.java

@@ -0,0 +1,139 @@
+package com.plotsquared.core.services.plots;
+
+import com.intellectualsites.services.types.Service;
+import com.plotsquared.core.player.PlotPlayer;
+import com.plotsquared.core.plot.Plot;
+import com.plotsquared.core.plot.PlotArea;
+import com.plotsquared.core.plot.PlotAreaType;
+import com.plotsquared.core.plot.PlotId;
+
+import javax.annotation.Nonnull;
+import javax.annotation.Nullable;
+import java.util.Collections;
+import java.util.List;
+import java.util.function.Predicate;
+
+public interface AutoService extends Service<AutoService.AutoQuery, List<Plot>> {
+
+    final class AutoQuery {
+
+        private final PlotPlayer<?> player;
+        private final PlotId startId;
+        private final int sizeX;
+        private final int sizeZ;
+        private final PlotArea plotArea;
+
+        /**
+         * Crate a new auto query
+         *
+         * @param player   Player to claim for
+         * @param startId  Plot ID to start searching from
+         * @param sizeX    Number of plots along the X axis
+         * @param sizeZ    Number of plots along the Z axis
+         * @param plotArea Plot area to search in
+         */
+        public AutoQuery(@Nonnull final PlotPlayer<?> player, @Nullable final PlotId startId,
+            final int sizeX, final int sizeZ, @Nonnull final PlotArea plotArea) {
+            this.player = player;
+            this.startId = startId;
+            this.sizeX = sizeX;
+            this.sizeZ = sizeZ;
+            this.plotArea = plotArea;
+        }
+
+        /**
+         * Get the player that the plots are meant for
+         *
+         * @return Player
+         */
+        @Nonnull public PlotPlayer<?> getPlayer() {
+            return this.player;
+        }
+
+        /**
+         * Get the plot ID to start searching from
+         *
+         * @return Start ID
+         */
+        @Nullable public PlotId getStartId() {
+            return this.startId;
+        }
+
+        /**
+         * Get the number of plots along the X axis
+         *
+         * @return Number of plots along the X axis
+         */
+        public int getSizeX() {
+            return this.sizeX;
+        }
+
+        /**
+         * Get the number of plots along the Z axis
+         *
+         * @return Number of plots along the Z axis
+         */
+        public int getSizeZ() {
+            return this.sizeZ;
+        }
+
+        /**
+         * Get the plot area to search in
+         *
+         * @return Plot area
+         */
+        @Nonnull public PlotArea getPlotArea() {
+            return this.plotArea;
+        }
+
+    }
+
+
+    final class DefaultAutoService implements AutoService {
+
+        @Override public List<Plot> handle(@Nonnull final AutoQuery autoQuery) {
+            return Collections.emptyList();
+        }
+
+    }
+
+
+    final class SinglePlotService implements AutoService, Predicate<AutoQuery> {
+
+        @Nullable @Override public List<Plot> handle(@Nonnull AutoQuery autoQuery) {
+            final Plot plot = autoQuery.getPlotArea().getNextFreePlot(autoQuery.getPlayer(), autoQuery.getStartId());
+            if (plot == null) {
+                return null;
+            }
+            return Collections.singletonList(plot);
+        }
+
+        @Override public boolean test(@Nonnull final AutoQuery autoQuery) {
+            return autoQuery.sizeX == 1 && autoQuery.sizeZ == 1;
+        }
+
+    }
+
+
+    final class MultiPlotService implements AutoService, Predicate<AutoQuery> {
+
+        @Override public List<Plot> handle(@Nonnull final AutoQuery autoQuery) {
+            /* TODO: Add timeout? */
+            while (true) {
+                final PlotId start = autoQuery.getPlotArea().getMeta("lastPlot", PlotId.of(0, 0)).getNextId();
+                final PlotId end = PlotId.of(start.getX() + autoQuery.getSizeX() - 1, start.getY() + autoQuery.getSizeZ() - 1);
+                final List<Plot> plots = autoQuery.getPlotArea().canClaim(autoQuery.getPlayer(), start, end);
+                if (plots != null && !plots.isEmpty()) {
+                    autoQuery.getPlotArea().setMeta("lastPlot", start);
+                    return plots;
+                }
+            }
+        }
+
+        @Override public boolean test(@Nonnull final AutoQuery autoQuery) {
+            return autoQuery.getPlotArea().getType() != PlotAreaType.PARTIAL;
+        }
+
+    }
+
+}