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Placeholders.java
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Placeholders.java
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package net.citizensnpcs.api.util;
import java.util.Collection;
import java.util.List;
import java.util.Optional;
import java.util.Random;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.OfflinePlayer;
import org.bukkit.command.BlockCommandSender;
import org.bukkit.command.CommandSender;
import org.bukkit.entity.Entity;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import com.google.common.collect.ImmutableSet;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import me.clip.placeholderapi.PlaceholderAPI;
import net.citizensnpcs.api.CitizensAPI;
import net.citizensnpcs.api.event.CitizensDisableEvent;
import net.citizensnpcs.api.npc.NPC;
import net.citizensnpcs.api.trait.trait.Owner;
public class Placeholders implements Listener {
public static interface PlaceholderFunction {
public String apply(NPC npc, CommandSender sender, String input);
}
private static class PlaceholderProvider {
PlaceholderFunction func;
Pattern regex;
PlaceholderProvider(Pattern regex, PlaceholderFunction func) {
this.regex = regex;
this.func = func;
}
}
private static OfflinePlayer getPlayer(BlockCommandSender sender) {
return CitizensAPI.getNMSHelper().getPlayer(sender);
}
private static String getWorldReplacement(Location location, String group, Entity excluding) {
if (group.charAt(0) != '<') {
group = '<' + group + '>';
}
switch (group) {
case "<random_player>":
case "<random_world_player>":
Collection<? extends Player> players = group.equals("<random_player>")
? Bukkit.getServer().getOnlinePlayers()
: location.getWorld().getPlayers();
Player possible = Iterables.get(players, new Random().nextInt(players.size()), null);
if (possible != null) {
return possible.getName();
}
break;
case "<random_npc>":
case "<random_npc_id>":
List<NPC> all = Lists.newArrayList(CitizensAPI.getNPCRegistry());
if (all.size() > 0) {
NPC random = all.get(new Random().nextInt(all.size()));
return group.equals("<random_npc>") ? random.getName() : Integer.toString(random.getId());
}
break;
case "<nearest_npc_id>":
Optional<NPC> closestNPC = location.getWorld().getNearbyEntities(location, 25, 25, 25).stream()
.map(CitizensAPI.getNPCRegistry()::getNPC).filter(e -> e != null && e.getEntity() != excluding)
.min((a, b) -> Double.compare(a.getEntity().getLocation().distanceSquared(location),
b.getEntity().getLocation().distanceSquared(location)));
if (closestNPC.isPresent()) {
return Integer.toString(closestNPC.get().getId());
}
break;
case "<nearest_player>":
double min = Double.MAX_VALUE;
Entity closest = null;
for (Player entity : CitizensAPI.getLocationLookup().getNearbyPlayers(location, 25)) {
if (entity == excluding || CitizensAPI.getNPCRegistry().isNPC(entity))
continue;
double dist = entity.getLocation().distanceSquared(location);
if (dist > min)
continue;
min = dist;
closest = entity;
}
if (closest != null) {
return closest.getName();
}
break;
case "<world>":
return location.getWorld().getName();
}
return "";
}
@EventHandler
private static void onCitizensDisable(CitizensDisableEvent event) {
PLACEHOLDERS.clear();
}
public static void registerNPCPlaceholder(Pattern regex, PlaceholderFunction func) {
if (regex.pattern().charAt(0) != '<') {
regex = Pattern.compile('<' + regex.pattern() + '>', regex.flags());
}
PLACEHOLDERS.add(new PlaceholderProvider(regex, func));
}
public static String replace(String text, CommandSender sender, NPC npc) {
text = replace(text, sender instanceof OfflinePlayer ? (OfflinePlayer) sender
: sender instanceof BlockCommandSender ? getPlayer((BlockCommandSender) sender) : null);
if (npc == null || text == null) {
return text;
}
StringBuffer out = new StringBuffer();
Matcher matcher = PLACEHOLDER_MATCHER.matcher(text);
while (matcher.find()) {
String replacement = "";
String group = matcher.group(1);
switch (group) {
case "id":
replacement = Integer.toString(npc.getId());
break;
case "npc":
replacement = npc.getName();
break;
case "owner":
replacement = npc.getOrAddTrait(Owner.class).getOwner();
break;
default:
replacement = getWorldReplacement(npc.getStoredLocation(), group, npc.getEntity());
break;
}
matcher.appendReplacement(out, "");
out.append(replacement);
}
matcher.appendTail(out);
for (PlaceholderProvider entry : PLACEHOLDERS) {
matcher = entry.regex.matcher(out.toString());
out = new StringBuffer();
while (matcher.find()) {
String group = matcher.group().substring(1, matcher.group().length() - 1);
matcher.appendReplacement(out, "");
out.append(entry.func.apply(npc, sender, group));
}
matcher.appendTail(out);
}
return out.toString();
}
public static String replace(String text, OfflinePlayer player) {
if (player == null || (!player.isOnline() && !player.hasPlayedBefore())) {
return setPlaceholderAPIPlaceholders(text, player);
}
if (text == null) {
return text;
}
if (player.getPlayer() != null) {
StringBuffer out = new StringBuffer();
Matcher matcher = PLAYER_PLACEHOLDER_MATCHER.matcher(text);
while (matcher.find()) {
String replacement = "";
String group = matcher.group(1);
if (PLAYER_VARIABLES.contains(group)) {
replacement = player.getName();
} else {
replacement = getWorldReplacement(player.getPlayer().getLocation(), group, player.getPlayer());
}
matcher.appendReplacement(out, "");
out.append(replacement);
}
matcher.appendTail(out);
text = out.toString();
} else {
for (int i = 0; i < PLAYER_PLACEHOLDERS.length; i++) {
text = text.replace(PLAYER_PLACEHOLDERS[i], player.getName());
}
}
return setPlaceholderAPIPlaceholders(text, player);
}
private static String setPlaceholderAPIPlaceholders(String text, OfflinePlayer player) {
if (!PLACEHOLDERAPI_ENABLED) {
return text;
}
try {
return PlaceholderAPI.setPlaceholders(player, text);
} catch (Throwable t) {
PLACEHOLDERAPI_ENABLED = false;
return text;
}
}
private static final Pattern PLACEHOLDER_MATCHER = Pattern.compile(
"<(id|npc|owner|random_player|random_world_player|random_npc|random_npc_id|nearest_npc_id|nearest_player|world)>");
private static boolean PLACEHOLDERAPI_ENABLED = true;
private static final List<PlaceholderProvider> PLACEHOLDERS = Lists.newArrayList();
private static final Pattern PLAYER_PLACEHOLDER_MATCHER = Pattern.compile(
"(<player>|<p>|@p|%player%|<random_player>|<random_world_player>|<random_npc>|<random_npc_id>|<nearest_npc_id>|<nearest_player>|<world>)");
private static final String[] PLAYER_PLACEHOLDERS = { "<player>", "<p>", "@p", "%player%" };
private static final Collection<String> PLAYER_VARIABLES = ImmutableSet.of("<player>", "<p>", "@p", "%player%");
}