// Copyright (C) 2008 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.httpd.rpc;
import com.google.common.collect.Iterables;
import com.google.common.collect.Lists;
import com.google.gerrit.common.data.AccountInfo;
import com.google.gerrit.common.data.GroupReference;
import com.google.gerrit.common.data.ReviewerInfo;
import com.google.gerrit.common.data.SuggestService;
import com.google.gerrit.common.errors.NoSuchGroupException;
import com.google.gerrit.reviewdb.client.Account;
import com.google.gerrit.reviewdb.client.AccountExternalId;
import com.google.gerrit.reviewdb.client.Change;
import com.google.gerrit.reviewdb.client.Project;
import com.google.gerrit.reviewdb.server.ReviewDb;
import com.google.gerrit.server.CurrentUser;
import com.google.gerrit.server.IdentifiedUser;
import com.google.gerrit.server.account.AccountCache;
import com.google.gerrit.server.account.AccountControl;
import com.google.gerrit.server.account.AccountVisibility;
import com.google.gerrit.server.account.GroupBackend;
import com.google.gerrit.server.account.GroupMembers;
import com.google.gerrit.server.config.GerritServerConfig;
import com.google.gerrit.server.patch.AddReviewer;
import com.google.gerrit.server.project.ChangeControl;
import com.google.gerrit.server.project.NoSuchChangeException;
import com.google.gerrit.server.project.NoSuchProjectException;
import com.google.gerrit.server.project.ProjectControl;
import com.google.gwtjsonrpc.common.AsyncCallback;
import com.google.gwtorm.server.OrmException;
import com.google.inject.Inject;
import com.google.inject.Provider;
import org.eclipse.jgit.lib.Config;
import java.util.ArrayList;
import java.util.Collections;
import java.util.LinkedHashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import javax.annotation.Nullable;
class SuggestServiceImpl extends BaseServiceImplementation implements
SuggestService {
private static final String MAX_SUFFIX = "\u9fa5";
private final Provider<ReviewDb> reviewDbProvider;
private final AccountCache accountCache;
private final GroupMembers.Factory groupMembersFactory;
private final IdentifiedUser.GenericFactory identifiedUserFactory;
private final AccountControl.Factory accountControlFactory;
private final ChangeControl.Factory changeControlFactory;
private final ProjectControl.Factory projectControlFactory;
private final Config cfg;
private final GroupBackend groupBackend;
private final boolean suggestAccounts;
@Inject
SuggestServiceImpl(final Provider<ReviewDb> schema,
final AccountCache accountCache,
final GroupMembers.Factory groupMembersFactory,
final Provider<CurrentUser> currentUser,
final IdentifiedUser.GenericFactory identifiedUserFactory,
final AccountControl.Factory accountControlFactory,
final ChangeControl.Factory changeControlFactory,
final ProjectControl.Factory projectControlFactory,
@GerritServerConfig final Config cfg, final GroupBackend groupBackend) {
super(schema, currentUser);
this.reviewDbProvider = schema;
this.accountCache = accountCache;
this.groupMembersFactory = groupMembersFactory;
this.identifiedUserFactory = identifiedUserFactory;
this.accountControlFactory = accountControlFactory;
this.changeControlFactory = changeControlFactory;
this.projectControlFactory = projectControlFactory;
this.cfg = cfg;
this.groupBackend = groupBackend;
if ("OFF".equals(cfg.getString("suggest", null, "accounts"))) {
this.suggestAccounts = false;
} else {
boolean suggestAccounts;
try {
AccountVisibility av =
cfg.getEnum("suggest", null, "accounts", AccountVisibility.ALL);
suggestAccounts = (av != AccountVisibility.NONE);
} catch (IllegalArgumentException err) {
suggestAccounts = cfg.getBoolean("suggest", null, "accounts", true);
}
this.suggestAccounts = suggestAccounts;
}
}
private interface VisibilityControl {
boolean isVisible(Account account) throws OrmException;
}
public void suggestAccount(final String query, final Boolean active,
final int limit, final AsyncCallback<List<AccountInfo>> callback) {
run(callback, new Action<List<AccountInfo>>() {
public List<AccountInfo> run(final ReviewDb db) throws OrmException {
return suggestAccount(db, query, active, limit, new VisibilityControl() {
@Override
public boolean isVisible(Account account) throws OrmException {
return accountControlFactory.get().canSee(account);
}
});
}
});
}
private List<AccountInfo> suggestAccount(final ReviewDb db,
final String query, final Boolean active, final int limit,
VisibilityControl visibilityControl)
throws OrmException {
if (!suggestAccounts) {
return Collections.<AccountInfo> emptyList();
}
final String a = query;
final String b = a + MAX_SUFFIX;
final int max = 10;
final int n = limit <= 0 ? max : Math.min(limit, max);
final LinkedHashMap<Account.Id, AccountInfo> r =
new LinkedHashMap<Account.Id, AccountInfo>();
for (final Account p : db.accounts().suggestByFullName(a, b, n)) {
addSuggestion(r, p, new AccountInfo(p), active, visibilityControl);
}
if (r.size() < n) {
for (final Account p : db.accounts().suggestByPreferredEmail(a, b,
n - r.size())) {
addSuggestion(r, p, new AccountInfo(p), active, visibilityControl);
}
}
if (r.size() < n) {
for (final AccountExternalId e : db.accountExternalIds()
.suggestByEmailAddress(a, b, n - r.size())) {
if (!r.containsKey(e.getAccountId())) {
final Account p = accountCache.get(e.getAccountId()).getAccount();
final AccountInfo info = new AccountInfo(p);
info.setPreferredEmail(e.getEmailAddress());
addSuggestion(r, p, info, active, visibilityControl);
}
}
}
return new ArrayList<AccountInfo>(r.values());
}
private void addSuggestion(Map<Account.Id, AccountInfo> map, Account account,
AccountInfo info, Boolean active, VisibilityControl visibilityControl)
throws OrmException {
if (map.containsKey(account.getId())) {
return;
}
if (active != null && active != account.isActive()) {
return;
}
if (visibilityControl.isVisible(account)) {
map.put(account.getId(), info);
}
}
public void suggestAccountGroup(final String query, final int limit,
final AsyncCallback<List<GroupReference>> callback) {
suggestAccountGroupForProject(null, query, limit, callback);
}
public void suggestAccountGroupForProject(final Project.NameKey project,
final String query, final int limit,
final AsyncCallback<List<GroupReference>> callback) {
run(callback, new Action<List<GroupReference>>() {
public List<GroupReference> run(final ReviewDb db) {
ProjectControl projectControl = null;
if (project != null) {
try {
projectControl = projectControlFactory.controlFor(project);
} catch (NoSuchProjectException e) {
return Collections.emptyList();
}
}
return suggestAccountGroup(projectControl, query, limit);
}
});
}
private List<GroupReference> suggestAccountGroup(
@Nullable final ProjectControl projectControl, final String query, final int limit) {
final int n = limit <= 0 ? 10 : Math.min(limit, 10);
return Lists.newArrayList(Iterables.limit(groupBackend.suggest(query), n));
}
@Override
public void suggestReviewer(Project.NameKey project, String query, int limit,
AsyncCallback<List<ReviewerInfo>> callback) {
// The RPC is deprecated, but return an empty list for RPC API compatibility.
callback.onSuccess(Collections.<ReviewerInfo>emptyList());
}
@Override
public void suggestChangeReviewer(final Change.Id change,
final String query, final int limit,
final AsyncCallback<List<ReviewerInfo>> callback) {
run(callback, new Action<List<ReviewerInfo>>() {
public List<ReviewerInfo> run(final ReviewDb db) throws OrmException {
final ChangeControl changeControl;
try {
changeControl = changeControlFactory.controlFor(change);
} catch (NoSuchChangeException e) {
return Collections.emptyList();
}
VisibilityControl visibilityControl = new VisibilityControl() {
@Override
public boolean isVisible(Account account) throws OrmException {
IdentifiedUser who =
identifiedUserFactory.create(reviewDbProvider, account.getId());
// we can't use changeControl directly as it won't suggest reviewers
// to drafts
return changeControl.forUser(who).isRefVisible();
}
};
final List<AccountInfo> suggestedAccounts =
suggestAccount(db, query, Boolean.TRUE, limit, visibilityControl);
final List<ReviewerInfo> reviewer =
new ArrayList<ReviewerInfo>(suggestedAccounts.size());
for (final AccountInfo a : suggestedAccounts) {
reviewer.add(new ReviewerInfo(a));
}
final List<GroupReference> suggestedAccountGroups =
suggestAccountGroup(changeControl.getProjectControl(), query, limit);
for (final GroupReference g : suggestedAccountGroups) {
if (suggestGroupAsReviewer(changeControl.getProject().getNameKey(), g)) {
reviewer.add(new ReviewerInfo(g));
}
}
Collections.sort(reviewer);
if (reviewer.size() <= limit) {
return reviewer;
} else {
return reviewer.subList(0, limit);
}
}
});
}
private boolean suggestGroupAsReviewer(final Project.NameKey project,
final GroupReference group) throws OrmException {
if (!AddReviewer.isLegalReviewerGroup(group.getUUID())) {
return false;
}
try {
final Set<Account> members =
groupMembersFactory.create().listAccounts(group.getUUID(), project);
if (members.isEmpty()) {
return false;
}
final int maxAllowed =
cfg.getInt("addreviewer", "maxAllowed",
AddReviewer.DEFAULT_MAX_REVIEWERS);
if (maxAllowed > 0 && members.size() > maxAllowed) {
return false;
}
} catch (NoSuchGroupException e) {
return false;
} catch (NoSuchProjectException e) {
return false;
}
return true;
}
}