VillageSiege.java

package net.minecraft.server;

import com.destroystokyo.paper.exception.ServerInternalException;

import java.util.Iterator;
import java.util.List;
import javax.annotation.Nullable;

public class VillageSiege {

    private final World a;
    private boolean b;
    private int c = -1;
    private int d;
    private int e;
    private Village f;
    private int g;
    private int h;
    private int i;

    public VillageSiege(World world) {
        this.a = world;
    }

    public void a() {
        if (this.a.B()) {
            this.c = 0;
        } else if (this.c != 2) {
            if (this.c == 0) {
                float f = this.a.c(0.0F);

                if ((double) f < 0.5D || (double) f > 0.501D) {
                    return;
                }

                this.c = this.a.random.nextInt(10) == 0 ? 1 : 2;
                this.b = false;
                if (this.c == 2) {
                    return;
                }
            }

            if (this.c != -1) {
                if (!this.b) {
                    if (!this.b()) {
                        return;
                    }

                    this.b = true;
                }

                if (this.e > 0) {
                    --this.e;
                } else {
                    this.e = 2;
                    if (this.d > 0) {
                        this.c();
                        --this.d;
                    } else {
                        this.c = 2;
                    }

                }
            }
        }
    }

    private boolean b() {
        List list = this.a.players;
        Iterator iterator = list.iterator();

        while (iterator.hasNext()) {
            EntityHuman entityhuman = (EntityHuman) iterator.next();

            if (!entityhuman.isSpectator()) {
                this.f = this.a.ai().getClosestVillage(new BlockPosition(entityhuman), 1);
                if (this.f != null && this.f.c() >= 10 && this.f.d() >= 20 && this.f.e() >= 20) {
                    BlockPosition blockposition = this.f.a();
                    float f = (float) this.f.b();
                    boolean flag = false;
                    int i = 0;

                    while (true) {
                        if (i < 10) {
                            float f1 = this.a.random.nextFloat() * 6.2831855F;

                            this.g = blockposition.getX() + (int) ((double) (MathHelper.cos(f1) * f) * 0.9D);
                            this.h = blockposition.getY();
                            this.i = blockposition.getZ() + (int) ((double) (MathHelper.sin(f1) * f) * 0.9D);
                            flag = false;
                            Iterator iterator1 = this.a.ai().getVillages().iterator();

                            while (iterator1.hasNext()) {
                                Village village = (Village) iterator1.next();

                                if (village != this.f && village.a(new BlockPosition(this.g, this.h, this.i))) {
                                    flag = true;
                                    break;
                                }
                            }

                            if (flag) {
                                ++i;
                                continue;
                            }
                        }

                        if (flag) {
                            return false;
                        }

                        Vec3D vec3d = this.a(new BlockPosition(this.g, this.h, this.i));

                        if (vec3d != null) {
                            this.e = 0;
                            this.d = 20;
                            return true;
                        }
                        break;
                    }
                }
            }
        }

        return false;
    }

    private boolean c() {
        Vec3D vec3d = this.a(new BlockPosition(this.g, this.h, this.i));

        if (vec3d == null) {
            return false;
        } else {
            EntityZombie entityzombie;

            try {
                entityzombie = new EntityZombie(this.a);
                entityzombie.prepare(this.a.D(new BlockPosition(entityzombie)), (GroupDataEntity) null);
            } catch (Exception exception) {
                exception.printStackTrace();
                ServerInternalException.reportInternalException(exception); // Paper
                return false;
            }

            entityzombie.setPositionRotation(vec3d.x, vec3d.y, vec3d.z, this.a.random.nextFloat() * 360.0F, 0.0F);
            this.a.addEntity(entityzombie, org.bukkit.event.entity.CreatureSpawnEvent.SpawnReason.VILLAGE_INVASION); // CraftBukkit
            BlockPosition blockposition = this.f.a();

            entityzombie.a(blockposition, this.f.b());
            return true;
        }
    }

    @Nullable
    private Vec3D a(BlockPosition blockposition) {
        for (int i = 0; i < 10; ++i) {
            BlockPosition blockposition1 = blockposition.a(this.a.random.nextInt(16) - 8, this.a.random.nextInt(6) - 3, this.a.random.nextInt(16) - 8);

            if (this.f.a(blockposition1) && SpawnerCreature.a(EntityInsentient.EnumEntityPositionType.ON_GROUND, this.a, blockposition1)) {
                return new Vec3D((double) blockposition1.getX(), (double) blockposition1.getY(), (double) blockposition1.getZ());
            }
        }

        return null;
    }
}