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| 1 | +package de.kiridevs.ksmpplugin.features; |
| 2 | + |
| 3 | +import de.kiridevs.ksmpplugin.Util; |
| 4 | +import de.kiridevs.ksmpplugin.main.KiriSmpPlugin; |
| 5 | +import io.papermc.paper.event.block.DragonEggFormEvent; |
| 6 | +import net.kyori.adventure.text.Component; |
| 7 | +import net.kyori.adventure.text.format.NamedTextColor; |
| 8 | +import org.bukkit.Bukkit; |
| 9 | +import org.bukkit.World; |
| 10 | +import org.bukkit.WorldBorder; |
| 11 | +import org.bukkit.boss.DragonBattle; |
| 12 | +import org.bukkit.entity.AreaEffectCloud; |
| 13 | +import org.bukkit.entity.EnderDragon; |
| 14 | +import org.bukkit.entity.Entity; |
| 15 | +import org.bukkit.entity.Player; |
| 16 | +import org.bukkit.event.EventHandler; |
| 17 | +import org.bukkit.event.Listener; |
| 18 | +import org.bukkit.event.entity.EntityDamageByEntityEvent; |
| 19 | +import org.bukkit.event.entity.EntityDamageEvent; |
| 20 | +import org.bukkit.event.player.PlayerChangedWorldEvent; |
| 21 | +import org.bukkit.projectiles.ProjectileSource; |
| 22 | + |
| 23 | +import java.util.Map; |
| 24 | + |
| 25 | +// This class groups all functionality responsible for making the EnderDragon stronger for the first dragon fight |
| 26 | +public class DragonBuff implements Listener { |
| 27 | + // Damage is reduced across the board to adjust for player amount |
| 28 | + // This modifier is applied after cause-specific modifiers |
| 29 | + public static final Float INCOMING_MODIFIER = 0.5f; |
| 30 | + |
| 31 | + // This modifier is applied to all damage coming *from* the dragon, |
| 32 | + // or AreaEffectCloud|s of its breath |
| 33 | + public static final Float OUTGOING_MODIFIER = 2f; |
| 34 | + public static final int END_WORLDBORDER_SIZE = 59_999_968; |
| 35 | + |
| 36 | + static final Map<EntityDamageEvent.DamageCause, Float> incomingDamageModifiers = Map.ofEntries( |
| 37 | + // Explosions don't do any damage |
| 38 | + Map.entry(EntityDamageEvent.DamageCause.ENTITY_EXPLOSION, 0f), |
| 39 | + Map.entry(EntityDamageEvent.DamageCause.BLOCK_EXPLOSION, 0f), |
| 40 | + |
| 41 | + // Melee Attacks only deal 35% of the damage |
| 42 | + Map.entry(EntityDamageEvent.DamageCause.ENTITY_ATTACK, 0.35f), |
| 43 | + Map.entry(EntityDamageEvent.DamageCause.ENTITY_SWEEP_ATTACK, 0.35f) |
| 44 | + ); |
| 45 | + |
| 46 | + final KiriSmpPlugin plugin; |
| 47 | + |
| 48 | + public DragonBuff(KiriSmpPlugin plugin) { |
| 49 | + this.plugin = plugin; |
| 50 | + } |
| 51 | + |
| 52 | + // This limits the world border during the fight |
| 53 | + @EventHandler |
| 54 | + public void onDimensionSwitch(PlayerChangedWorldEvent event) { |
| 55 | + Player player = event.getPlayer(); |
| 56 | + World world = player.getWorld(); |
| 57 | + if (world.getPlayerCount() > 1) return; // There are other players already, don't touch anything |
| 58 | + |
| 59 | + if (!Util.entityIsPartOfFirstDragonBattle(player)) return; |
| 60 | + DragonBattle battle = world.getEnderDragonBattle(); |
| 61 | + assert battle != null; |
| 62 | + |
| 63 | + // Rename the first dragon due to its higher strength |
| 64 | + // Dragon might take a little while to spawn, so let's wait for that |
| 65 | + Bukkit.getScheduler().scheduleSyncDelayedTask(this.plugin, () -> { |
| 66 | + EnderDragon dragon = battle.getEnderDragon(); |
| 67 | + if (dragon == null) return; // The dragon somehow already died |
| 68 | + this.plugin.log.info("Changed dragon name"); |
| 69 | + dragon.customName(Component.text("Elder Dragon").color(NamedTextColor.AQUA)); |
| 70 | + }, 5); // 5t * 20t/s = 0.25s |
| 71 | + |
| 72 | + // Limit world border for the first dragon fight |
| 73 | + WorldBorder border = player.getWorld().getWorldBorder(); |
| 74 | + border.setCenter(0, 0); |
| 75 | + border.setSize(500); |
| 76 | + border.setWarningDistance(50); |
| 77 | + border.setDamageAmount(2); |
| 78 | + } |
| 79 | + |
| 80 | + // This EventHandler is responsible for modifying any incoming damage (AGAINST the dragon) |
| 81 | + @EventHandler |
| 82 | + public void onEntityDamage(EntityDamageEvent event) { |
| 83 | + Entity target = event.getEntity(); |
| 84 | + if (!(target instanceof EnderDragon)) return; |
| 85 | + if (!Util.entityIsPartOfFirstDragonBattle(target)) return; |
| 86 | + |
| 87 | + // Apply whatever causeModifier applies |
| 88 | + EntityDamageEvent.DamageCause dmgCause = event.getCause(); |
| 89 | + float effectiveModifer = INCOMING_MODIFIER; |
| 90 | + for (EntityDamageEvent.DamageCause testCause : incomingDamageModifiers.keySet()) { |
| 91 | + if (!testCause.equals(dmgCause)) continue; |
| 92 | + |
| 93 | + Float causeModifier = incomingDamageModifiers.get(testCause); |
| 94 | + effectiveModifer = effectiveModifer * causeModifier; |
| 95 | + } |
| 96 | + |
| 97 | + Util.applyDamageModifier(event, effectiveModifer); |
| 98 | + } |
| 99 | + |
| 100 | + // This EventHandler is responsible for modifying any outgoing damage (FROM the dragon) |
| 101 | + @EventHandler |
| 102 | + public void onEntityDamageByEntity(EntityDamageByEntityEvent event) { |
| 103 | + Entity damager = event.getDamager(); |
| 104 | + if (damager instanceof EnderDragon) { |
| 105 | + Util.applyDamageModifier(event, OUTGOING_MODIFIER); |
| 106 | + } else if (damager instanceof AreaEffectCloud) { |
| 107 | + AreaEffectCloud cloud = (AreaEffectCloud) event.getDamager(); |
| 108 | + ProjectileSource source = cloud.getSource(); |
| 109 | + if (source instanceof EnderDragon) Util.applyDamageModifier(event, OUTGOING_MODIFIER); |
| 110 | + } |
| 111 | + } |
| 112 | + |
| 113 | + // This resets the world border when the first dragon fight concludes |
| 114 | + @EventHandler |
| 115 | + public void onFirstDragonDeath(DragonEggFormEvent event) { |
| 116 | + WorldBorder border = event.getBlock().getWorld().getWorldBorder(); |
| 117 | + border.setCenter(0, 0); |
| 118 | + border.setSize(END_WORLDBORDER_SIZE); |
| 119 | + border.setWarningDistance(5); |
| 120 | + } |
| 121 | + |
| 122 | + public void init() { |
| 123 | + this.plugin.log.info("features: DragonBuff: Initializing"); |
| 124 | + Bukkit.getPluginManager().registerEvents(this, this.plugin); |
| 125 | + } |
| 126 | +} |
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