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// Copyright (C) 2013 The Android Open Source Project
//
// 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.server.project;
import static java.util.stream.Collectors.toList;
import com.google.common.collect.ArrayListMultimap;
import com.google.common.collect.Multimap;
import com.google.gerrit.extensions.common.ProjectInfo;
import com.google.gerrit.extensions.restapi.RestReadView;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.config.AllProjectsName;
import com.google.gerrit.server.permissions.PermissionBackend;
import com.google.gerrit.server.permissions.PermissionBackendException;
import com.google.gerrit.server.permissions.ProjectPermission;
import com.google.inject.Inject;
import com.google.inject.Provider;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import org.kohsuke.args4j.Option;
public class ListChildProjects implements RestReadView<ProjectResource> {
@Option(name = "--recursive", usage = "to list child projects recursively")
private boolean recursive;
private final ProjectCache projectCache;
private final PermissionBackend permissionBackend;
private final Provider<CurrentUser> user;
private final AllProjectsName allProjects;
private final ProjectJson json;
@Inject
ListChildProjects(
ProjectCache projectCache,
PermissionBackend permissionBackend,
Provider<CurrentUser> user,
AllProjectsName allProjectsName,
ProjectJson json) {
this.projectCache = projectCache;
this.permissionBackend = permissionBackend;
this.user = user;
this.allProjects = allProjectsName;
this.json = json;
}
public void setRecursive(boolean recursive) {
this.recursive = recursive;
}
@Override
public List<ProjectInfo> apply(ProjectResource rsrc) throws PermissionBackendException {
if (recursive) {
return recursiveChildProjects(rsrc.getNameKey());
}
return directChildProjects(rsrc.getNameKey());
}
private List<ProjectInfo> directChildProjects(Project.NameKey parent)
throws PermissionBackendException {
Map<Project.NameKey, Project> children = new HashMap<>();
for (Project.NameKey name : projectCache.all()) {
ProjectState c = projectCache.get(name);
if (c != null && parent.equals(c.getProject().getParent(allProjects))) {
children.put(c.getNameKey(), c.getProject());
}
}
return permissionBackend.user(user).filter(ProjectPermission.ACCESS, children.keySet()).stream()
.sorted()
.map((p) -> json.format(children.get(p)))
.collect(toList());
}
private List<ProjectInfo> recursiveChildProjects(Project.NameKey parent)
throws PermissionBackendException {
Map<Project.NameKey, Project> projects = readAllProjects();
Multimap<Project.NameKey, Project.NameKey> children = parentToChildren(projects);
PermissionBackend.WithUser perm = permissionBackend.user(user);
List<ProjectInfo> results = new ArrayList<>();
depthFirstFormat(results, perm, projects, children, parent);
return results;
}
private Map<Project.NameKey, Project> readAllProjects() {
Map<Project.NameKey, Project> projects = new HashMap<>();
for (Project.NameKey name : projectCache.all()) {
ProjectState c = projectCache.get(name);
if (c != null) {
projects.put(c.getNameKey(), c.getProject());
}
}
return projects;
}
/** Map of parent project to direct child. */
private Multimap<Project.NameKey, Project.NameKey> parentToChildren(
Map<Project.NameKey, Project> projects) {
Multimap<Project.NameKey, Project.NameKey> m = ArrayListMultimap.create();
for (Map.Entry<Project.NameKey, Project> e : projects.entrySet()) {
if (!allProjects.equals(e.getKey())) {
m.put(e.getValue().getParent(allProjects), e.getKey());
}
}
return m;
}
private void depthFirstFormat(
List<ProjectInfo> results,
PermissionBackend.WithUser perm,
Map<Project.NameKey, Project> projects,
Multimap<Project.NameKey, Project.NameKey> children,
Project.NameKey parent)
throws PermissionBackendException {
List<Project.NameKey> canSee =
perm.filter(ProjectPermission.ACCESS, children.get(parent)).stream()
.sorted()
.collect(toList());
children.removeAll(parent); // removing all entries prevents cycles.
for (Project.NameKey c : canSee) {
results.add(json.format(projects.get(c)));
depthFirstFormat(results, perm, projects, children, c);
}
}
}
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