Java tutorial
/** * PermissionsEx * Copyright (C) zml and PermissionsEx contributors * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ package ninja.leaping.permissionsex.bukkit; import com.google.common.base.Preconditions; import com.google.common.collect.ImmutableSet; import com.google.common.collect.Iterables; import com.google.common.collect.Iterators; import com.google.common.collect.Maps; import ninja.leaping.permissionsex.PermissionsEx; import ninja.leaping.permissionsex.exception.PermissionsLoadingException; import ninja.leaping.permissionsex.subject.CalculatedSubject; import ninja.leaping.permissionsex.util.NodeTree; import org.bukkit.entity.Player; import org.bukkit.permissions.Permissible; import org.bukkit.permissions.PermissibleBase; import org.bukkit.permissions.Permission; import org.bukkit.permissions.PermissionAttachment; import org.bukkit.permissions.PermissionAttachmentInfo; import org.bukkit.permissions.PermissionRemovedExecutor; import org.bukkit.plugin.Plugin; import java.util.HashSet; import java.util.Iterator; import java.util.Map; import java.util.Set; import java.util.Spliterator; import java.util.Spliterators; import java.util.regex.Matcher; import java.util.regex.Pattern; import java.util.stream.StreamSupport; import static ninja.leaping.permissionsex.PermissionsEx.SUBJECTS_GROUP; import static ninja.leaping.permissionsex.PermissionsEx.SUBJECTS_USER; import static ninja.leaping.permissionsex.bukkit.BukkitTranslations.t; /** * Implementation of Permissible using PEX for data */ public class PEXPermissible extends PermissibleBase { private static Metapermission[] METAPERMISSIONS = new Metapermission[] { /** * | Permission | Usage |----------------------------|------ | `group.<group>` | Added for each group a user is in | `groups.<group>` | same as above | `options.<option>.<value>` | Each option the user has | `prefix.<prefix>` | User's prefix | `suffix.<suffix>` | User's suffix */ new Metapermission(Pattern.compile("groups?\\.(?<name>.+)")) { @Override public boolean isMatch(Matcher result, CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { return subj.getParents(contexts) .contains(Maps.immutableEntry(SUBJECTS_GROUP, result.group("name"))); } @Override public Iterator<String> getValues(CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { return subj .getParents(contexts).stream().filter( ent -> ent.getKey().equals(SUBJECTS_GROUP)) .flatMap(ent -> StreamSupport.<String>stream(Spliterators.spliterator( new String[] { "group." + ent.getValue(), "groups." + ent.getValue() }, Spliterator.IMMUTABLE | Spliterator.DISTINCT), false)) .iterator(); } }, new Metapermission(Pattern.compile("options\\.(?<key>.*)\\.(?<value>.*)")) { @Override public boolean isMatch(Matcher result, CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { return subj.getOption(contexts, result.group("key")) .map(val -> val.equals(result.group("value"))).orElse(false); } @Override public Iterator<String> getValues(CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { return Iterables.transform(subj.getOptions(contexts).entrySet(), ent -> "options." + ent.getKey() + "." + ent.getValue()).iterator(); } }, new SpecificOptionMetapermission("prefix"), new SpecificOptionMetapermission("suffix") }; private abstract static class Metapermission { /** * Pattern to match against */ private final Pattern matchAgainst; protected Metapermission(Pattern matchAgainst) { this.matchAgainst = matchAgainst; } public abstract boolean isMatch(Matcher result, CalculatedSubject subj, Set<Map.Entry<String, String>> contexts); public abstract Iterator<String> getValues(CalculatedSubject subj, Set<Map.Entry<String, String>> contexts); } private static class SpecificOptionMetapermission extends Metapermission { private final String option; public SpecificOptionMetapermission(String option) { super(Pattern.compile(Pattern.quote(option) + "\\.(?<value>.+)")); this.option = option; } @Override public boolean isMatch(Matcher result, CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { return subj.getOption(contexts, option).map(val -> val.equals(result.group("value"))).orElse(false); } @Override public Iterator<String> getValues(CalculatedSubject subj, Set<Map.Entry<String, String>> contexts) { String ret = subj.getOptions(contexts).get(option); return ret == null ? Iterators.emptyIterator() : Iterators.singletonIterator(this.option + "." + ret); } } private final Player player; private final PermissionsExPlugin plugin; private PermissionsEx pex; private CalculatedSubject subj; private Permissible previousPermissible; private final Set<PEXPermissionAttachment> attachments = new HashSet<>(); public PEXPermissible(Player player, PermissionsExPlugin plugin) { super(player); this.player = player; this.plugin = plugin; try { this.pex = plugin.getManager(); this.subj = pex.getCalculatedSubject(SUBJECTS_USER, player.getUniqueId().toString()); } catch (PermissionsLoadingException e) { throw new ExceptionInInitializerError(e); } } public PermissionsEx getManager() { return this.pex; } @Override public boolean isOp() { return super.isOp(); // TODO: Implement op handling } @Override public void setOp(boolean value) { super.setOp(value); } @Override public boolean isPermissionSet(String name) { Preconditions.checkNotNull(name, "name"); name = name.toLowerCase(); return getPermissionValue(getActiveContexts(), name) != 0; } private int getPermissionValue(Set<Map.Entry<String, String>> contexts, String permission) { int ret = getPermissionValue0(subj.getPermissions(contexts), permission); if (ret == 0) { for (Metapermission mPerm : METAPERMISSIONS) { Matcher match = mPerm.matchAgainst.matcher(permission); if (match.matches() && mPerm.isMatch(match, subj, contexts)) { ret = 1; } } } if (pex.hasDebugMode()) { pex.getLogger().info(t("Checked permission %s for player %s in contexts %s: %s", permission, player.getName(), contexts, ret)); } return ret; } private int getPermissionValue0(NodeTree nodeTree, String name) { int val = nodeTree.get(name); if (val != 0) { return val; } for (Map.Entry<String, Boolean> ent : plugin.getPermissionList().getParents(name)) { val = getPermissionValue0(nodeTree, ent.getKey()); if (!ent.getValue()) { val = -val; } if (val != 0) { return val; } } return 0; } @Override public boolean isPermissionSet(Permission perm) { Preconditions.checkNotNull(perm, "perm"); return isPermissionSet(perm.getName()); } @Override public boolean hasPermission(String inName) { Preconditions.checkNotNull(inName, "inName"); inName = inName.toLowerCase(); return getPermissionValue(getActiveContexts(), inName) > 0; } @Override public boolean hasPermission(Permission perm) { Preconditions.checkNotNull(perm, "perm"); return hasPermission(perm.getName()); } @Override public PermissionAttachment addAttachment(Plugin plugin, String name, boolean value) { return super.addAttachment(plugin, name, value); } @Override public PermissionAttachment addAttachment(Plugin plugin) { final PEXPermissionAttachment attach = new PEXPermissionAttachment(plugin, player, this); this.subj.transientData() .update(input -> input.addParent(PermissionsEx.GLOBAL_CONTEXT, PEXPermissionAttachment.ATTACHMENT_TYPE, attach.getIdentifier())) .thenRun(() -> this.attachments.add(attach)); return attach; } public boolean removeAttachmentInternal(final PEXPermissionAttachment attach) { this.subj.transientData().update(input -> input.removeParent(PermissionsEx.GLOBAL_CONTEXT, PEXPermissionAttachment.ATTACHMENT_TYPE, attach.getIdentifier())).thenRun(() -> { PermissionRemovedExecutor exec = attach.getRemovalCallback(); if (exec != null) { exec.attachmentRemoved(attach); } }); return true; } @Override public void removeAttachment(PermissionAttachment attachment) { if (!(attachment instanceof PEXPermissionAttachment)) { throw new IllegalArgumentException("Provided attachment was not a PEX attachment!"); } removeAttachmentInternal(((PEXPermissionAttachment) attachment)); this.attachments.remove(attachment); } void removeAllAttachments() { for (PEXPermissionAttachment attach : this.attachments) { removeAttachmentInternal(attach); } this.attachments.clear(); } @Override public void recalculatePermissions() { // We don't need this currently? Guess could clear cache somehow, but automated should get it right. well, except for people adding children to permissions -- that is just weird } @Override public synchronized void clearPermissions() { // todo } @Override public PermissionAttachment addAttachment(Plugin plugin, String name, boolean value, int ticks) { return super.addAttachment(plugin, name, value, ticks); } @Override public PermissionAttachment addAttachment(Plugin plugin, int ticks) { return addAttachment(plugin); // TODO: Implement timed permissions } @Override public Set<PermissionAttachmentInfo> getEffectivePermissions() { ImmutableSet.Builder<PermissionAttachmentInfo> ret = ImmutableSet.builder(); final Set<Map.Entry<String, String>> activeContexts = getActiveContexts(); ret.addAll(Iterables.transform(subj.getPermissions(activeContexts).asMap().entrySet(), input -> new PermissionAttachmentInfo(player, input.getKey(), null, input.getValue() > 0))); for (Metapermission mPerm : METAPERMISSIONS) { ret.addAll(Iterators.transform(mPerm.getValues(this.subj, activeContexts), input -> new PermissionAttachmentInfo(player, input, null, true))); } return ret.build(); } public Set<Map.Entry<String, String>> getActiveContexts() { ImmutableSet.Builder<Map.Entry<String, String>> builder = ImmutableSet.builder(); builder.add(Maps.immutableEntry("world", player.getWorld().getName())); builder.add(Maps.immutableEntry("dimension", player.getWorld().getEnvironment().name().toLowerCase())); for (String serverTag : plugin.getManager().getConfig().getServerTags()) { builder.add(Maps.immutableEntry(PermissionsExPlugin.SERVER_TAG_CONTEXT, serverTag)); } return builder.build(); } public void setPreviousPermissible(Permissible previousPermissible) { this.previousPermissible = previousPermissible; } public Permissible getPreviousPermissible() { return previousPermissible; } }