Implement tpbiome command

src/main/java/com/dfsek/terra/async/AsyncBiomeFinder.java

@@ -1,4 +1,63 @@
 package com.dfsek.terra.async;
 
-public class AsyncBiomeFinder {
+import com.dfsek.terra.Terra;
+import com.dfsek.terra.biome.TerraBiomeGrid;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.polydev.gaea.biome.Biome;
+import org.polydev.gaea.generation.GenerationPhase;
+
+public class AsyncBiomeFinder implements Runnable {
+    private final TerraBiomeGrid grid;
+    private final int centerX;
+    private final int centerZ;
+    private final int startRadius;
+    private final int maxRadius;
+    private final Biome target;
+    private final Player p;
+    private final boolean tp;
+    public AsyncBiomeFinder(TerraBiomeGrid grid, Biome target, Player p, int startRadius, int maxRadius, boolean tp) {
+        this.grid = grid;
+        this.target = target;
+        this.p = p;
+        this.centerX = p.getLocation().getBlockX();
+        this.centerZ = p.getLocation().getBlockZ();
+        this.startRadius = startRadius;
+        this.maxRadius = maxRadius;
+        this.tp = tp;
+    }
+    @Override
+    public void run() {
+        int x = centerX;
+        int z = centerZ;
+        int run = 1;
+        boolean toggle = true;
+        main: for(int i = startRadius; i < maxRadius; i++) {
+            for(int j = 0; j < run; j++) {
+                if(toggle) x++;
+                else x--;
+                if(checkBiome(x, z).equals(target)) break main;
+            }
+            for(int j = 0; j < run; j++) {
+                if(toggle) z++;
+                else z--;
+                if(checkBiome(x, z).equals(target)) break main;
+            }
+            run++;
+            toggle = !toggle;
+        }
+        if(checkBiome(x, z).equals(target) && p.isOnline()) {
+            p.sendMessage("Located biome at (" + x + ", " + z + ").");
+            if(tp) {
+                int finalX = x;
+                int finalZ = z;
+                Bukkit.getScheduler().runTask(Terra.getInstance(), () -> p.teleport(new Location(p.getWorld(), finalX, p.getLocation().getY(), finalZ)));
+            }
+        } else if(p.isOnline()) p.sendMessage("Unable to locate biome.");
+
+    }
+    private Biome checkBiome(int x, int z) {
+        return grid.getBiome(x, z, GenerationPhase.POST_GEN);
+    }
 }

src/main/java/com/dfsek/terra/command/BiomeTeleportCommand.java

@@ -1,41 +0,0 @@
-package com.dfsek.terra.command;
-
-import com.dfsek.terra.TerraWorld;
-import com.dfsek.terra.command.type.WorldCommand;
-import com.dfsek.terra.generation.TerraChunkGenerator;
-import org.bukkit.World;
-import org.bukkit.command.Command;
-import org.bukkit.command.CommandSender;
-import org.bukkit.entity.Player;
-import org.jetbrains.annotations.NotNull;
-
-import java.util.Collections;
-import java.util.List;
-
-public class BiomeTeleportCommand extends WorldCommand {
-    @Override
-    public boolean execute(@NotNull Player sender, @NotNull Command command, @NotNull String label, @NotNull String[] args, World world) {
-        return false;
-    }
-
-    @Override
-    public String getName() {
-        return "tpbiome";
-    }
-
-    @Override
-    public List<com.dfsek.terra.command.type.Command> getSubCommands() {
-        return Collections.emptyList();
-    }
-
-    @Override
-    public int arguments() {
-        return 1;
-    }
-
-    @Override
-    public List<String> getTabCompletions(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) {
-        if(!(sender instanceof  Player) || !(((Player) sender).getWorld().getGenerator() instanceof TerraChunkGenerator)) return Collections.emptyList();
-        return TerraWorld.getWorld(((Player) sender).getWorld()).getConfig().getBiomeIDs();
-    }
-}

src/main/java/com/dfsek/terra/command/TerraCommand.java

@@ -1,5 +1,6 @@
 package com.dfsek.terra.command;
 
+import com.dfsek.terra.command.biome.BiomeCommand;
 import com.dfsek.terra.command.image.ImageCommand;
 import com.dfsek.terra.command.profile.ProfileCommand;
 import com.dfsek.terra.command.structure.StructureCommand;

src/main/java/com/dfsek/terra/command/biome/BiomeCommand.java

@@ -1,4 +1,4 @@
-package com.dfsek.terra.command;
+package com.dfsek.terra.command.biome;
 
 import com.dfsek.terra.TerraWorld;
 import com.dfsek.terra.biome.TerraBiomeGrid;
@@ -11,6 +11,7 @@ import org.bukkit.entity.Player;
 import org.jetbrains.annotations.NotNull;
 import org.polydev.gaea.generation.GenerationPhase;
 
+import java.util.Arrays;
 import java.util.Collections;
 import java.util.List;
 
@@ -30,7 +31,7 @@ public class BiomeCommand extends WorldCommand {
 
     @Override
     public List<com.dfsek.terra.command.type.Command> getSubCommands() {
-        return Collections.emptyList();
+        return Arrays.asList(new BiomeLocateCommand(true), new BiomeLocateCommand(false));
     }
 
     @Override

src/main/java/com/dfsek/terra/command/biome/BiomeLocateCommand.java

@@ -0,0 +1,69 @@
+package com.dfsek.terra.command.biome;
+
+import com.dfsek.terra.Terra;
+import com.dfsek.terra.TerraWorld;
+import com.dfsek.terra.async.AsyncBiomeFinder;
+import com.dfsek.terra.biome.UserDefinedBiome;
+import com.dfsek.terra.command.type.WorldCommand;
+import com.dfsek.terra.generation.TerraChunkGenerator;
+import org.bukkit.Bukkit;
+import org.bukkit.World;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
+import java.util.stream.Collectors;
+
+public class BiomeLocateCommand extends WorldCommand {
+    private final boolean tp;
+    public BiomeLocateCommand(boolean teleport) {
+        this.tp = teleport;
+    }
+    @Override
+    public boolean execute(@NotNull Player sender, @NotNull Command command, @NotNull String label, @NotNull String[] args, World world) {
+        String id = args[0];
+        int maxRadius;
+        try {
+            maxRadius = Integer.parseInt(args[1]);
+        } catch(NumberFormatException e) {
+            sender.sendMessage("Invalid radius: " + args[1]);
+            return true;
+        }
+        UserDefinedBiome b;
+        try {
+            b = TerraWorld.getWorld(world).getConfig().getBiome(id).getBiome();
+        } catch(IllegalArgumentException | NullPointerException e) {
+            sender.sendMessage("Invalid biome ID: " + id);
+            return true;
+        }
+        Bukkit.getScheduler().runTaskAsynchronously(Terra.getInstance(), new AsyncBiomeFinder(TerraWorld.getWorld(world).getGrid(), b, sender, 0, maxRadius, tp));
+        return false;
+    }
+
+    @Override
+    public String getName() {
+        return tp ? "teleport" : "locate";
+    }
+
+    @Override
+    public List<com.dfsek.terra.command.type.Command> getSubCommands() {
+        return Collections.emptyList();
+    }
+
+    @Override
+    public int arguments() {
+        return 2;
+    }
+
+    @Override
+    public List<String> getTabCompletions(@NotNull CommandSender sender, @NotNull String alias, @NotNull String[] args) {
+        if(!(sender instanceof  Player) || !(((Player) sender).getWorld().getGenerator() instanceof TerraChunkGenerator)) return Collections.emptyList();
+        List<String> ids = TerraWorld.getWorld(((Player) sender).getWorld()).getConfig().getBiomeIDs();
+        if(args.length == 1) return ids.stream().filter(string -> string.toUpperCase().startsWith(args[0].toUpperCase())).collect(Collectors.toList());
+        return Collections.emptyList();
+    }
+}

src/main/java/com/dfsek/terra/command/type/Command.java

@@ -67,7 +67,7 @@ public abstract class Command implements CommandExecutor, TabCompleter {
                 if(c.getName().equals(args[0])) return c.onCommand(sender, command, label, Arrays.stream(args, 1, args.length).toArray(String[]::new));
             }
             if(args.length != arguments()) {
-                sender.sendMessage("Invalid command.");
+                sender.sendMessage("Invalid command. (Expected " + arguments() + " arguments, found " + args.length + ").");
                 return true;
             }
             return execute(sender, command, label, args);