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// Copyright (C) 2010 The Android Open Source Project
// Copyright (C) 2012 Digia Plc and/or its subsidiary(-ies).
//
// 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 com.google.gerrit.common.data;
import java.util.ArrayList;
import java.util.Iterator;
import java.util.List;
/** A single permission within an {@link AccessSection} of a project. */
public class Permission implements Comparable<Permission> {
public static final String CREATE = "create";
public static final String FORGE_AUTHOR = "forgeAuthor";
public static final String FORGE_COMMITTER = "forgeCommitter";
public static final String FORGE_SERVER = "forgeServerAsCommitter";
public static final String LABEL = "label-";
public static final String OWNER = "owner";
public static final String PUSH = "push";
public static final String PUSH_MERGE = "pushMerge";
public static final String PUSH_TAG = "pushTag";
public static final String READ = "read";
public static final String SUBMIT = "submit";
public static final String STAGE = "stage";
private static final List<String> NAMES_LC;
static {
NAMES_LC = new ArrayList<String>();
NAMES_LC.add(OWNER.toLowerCase());
NAMES_LC.add(READ.toLowerCase());
NAMES_LC.add(CREATE.toLowerCase());
NAMES_LC.add(FORGE_AUTHOR.toLowerCase());
NAMES_LC.add(FORGE_COMMITTER.toLowerCase());
NAMES_LC.add(FORGE_SERVER.toLowerCase());
NAMES_LC.add(PUSH.toLowerCase());
NAMES_LC.add(PUSH_MERGE.toLowerCase());
NAMES_LC.add(PUSH_TAG.toLowerCase());
NAMES_LC.add(LABEL.toLowerCase());
NAMES_LC.add(SUBMIT.toLowerCase());
NAMES_LC.add(STAGE.toLowerCase());
}
/** @return true if the name is recognized as a permission name. */
public static boolean isPermission(String varName) {
String lc = varName.toLowerCase();
if (lc.startsWith(LABEL)) {
return LABEL.length() < lc.length();
}
return NAMES_LC.contains(lc);
}
/** @return true if the permission name is actually for a review label. */
public static boolean isLabel(String varName) {
return varName.startsWith(LABEL) && LABEL.length() < varName.length();
}
/** @return permission name for the given review label. */
public static String forLabel(String labelName) {
return LABEL + labelName;
}
protected String name;
protected boolean exclusiveGroup;
protected List<PermissionRule> rules;
protected Permission() {
}
public Permission(String name) {
this.name = name;
}
public String getName() {
return name;
}
public boolean isLabel() {
return isLabel(getName());
}
public String getLabel() {
if (isLabel()) {
return getName().substring(LABEL.length());
}
return null;
}
public Boolean getExclusiveGroup() {
// Only permit exclusive group behavior on non OWNER permissions,
// otherwise an owner might lose access to a delegated subspace.
//
return exclusiveGroup && !OWNER.equals(getName());
}
public void setExclusiveGroup(Boolean newExclusiveGroup) {
exclusiveGroup = newExclusiveGroup;
}
public List<PermissionRule> getRules() {
initRules();
return rules;
}
public void setRules(List<PermissionRule> list) {
rules = list;
}
public void add(PermissionRule rule) {
initRules();
rules.add(rule);
}
public void remove(PermissionRule rule) {
if (rule != null) {
removeRule(rule.getGroup());
}
}
public void removeRule(GroupReference group) {
if (rules != null) {
for (Iterator<PermissionRule> itr = rules.iterator(); itr.hasNext();) {
if (sameGroup(itr.next(), group)) {
itr.remove();
}
}
}
}
public PermissionRule getRule(GroupReference group) {
return getRule(group, false);
}
public PermissionRule getRule(GroupReference group, boolean create) {
initRules();
for (PermissionRule r : rules) {
if (sameGroup(r, group)) {
return r;
}
}
if (create) {
PermissionRule r = new PermissionRule(group);
rules.add(r);
return r;
} else {
return null;
}
}
void mergeFrom(Permission src) {
for (PermissionRule srcRule : src.getRules()) {
PermissionRule dstRule = getRule(srcRule.getGroup());
if (dstRule != null) {
dstRule.mergeFrom(srcRule);
} else {
add(srcRule);
}
}
}
private static boolean sameGroup(PermissionRule rule, GroupReference group) {
if (group.getUUID() != null) {
return group.getUUID().equals(rule.getGroup().getUUID());
} else if (group.getName() != null) {
return group.getName().equals(rule.getGroup().getName());
} else {
return false;
}
}
private void initRules() {
if (rules == null) {
rules = new ArrayList<PermissionRule>(4);
}
}
@Override
public int compareTo(Permission b) {
int cmp = index(this) - index(b);
if (cmp == 0) getName().compareTo(b.getName());
return cmp;
}
private static int index(Permission a) {
String lc = a.isLabel() ? Permission.LABEL : a.getName().toLowerCase();
int index = NAMES_LC.indexOf(lc);
return 0 <= index ? index : NAMES_LC.size();
}
}
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