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// Copyright (C) 2009 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.common.data;
import com.google.gerrit.reviewdb.client.PatchLineComment;
import com.google.gerrit.reviewdb.client.PatchSet;
import java.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
public class CommentDetail {
protected List<PatchLineComment> a;
protected List<PatchLineComment> b;
protected AccountInfoCache accounts;
private transient PatchSet.Id idA;
private transient PatchSet.Id idB;
private transient Map<Integer, List<PatchLineComment>> forA;
private transient Map<Integer, List<PatchLineComment>> forB;
public CommentDetail(final PatchSet.Id idA, final PatchSet.Id idB) {
this.a = new ArrayList<PatchLineComment>();
this.b = new ArrayList<PatchLineComment>();
this.idA = idA;
this.idB = idB;
}
protected CommentDetail() {
}
public boolean include(final PatchLineComment p) {
final PatchSet.Id psId = p.getKey().getParentKey().getParentKey();
switch (p.getSide()) {
case 0:
if (idA == null && idB.equals(psId)) {
a.add(p);
return true;
}
break;
case 1:
if (idA != null && idA.equals(psId)) {
a.add(p);
return true;
}
if (idB.equals(psId)) {
b.add(p);
return true;
}
break;
}
return false;
}
public void setAccountInfoCache(final AccountInfoCache a) {
accounts = a;
}
public AccountInfoCache getAccounts() {
return accounts;
}
public List<PatchLineComment> getCommentsA() {
return a;
}
public List<PatchLineComment> getCommentsB() {
return b;
}
public boolean isEmpty() {
return a.isEmpty() && b.isEmpty();
}
public List<PatchLineComment> getForA(final int lineNbr) {
if (lineNbr == 0) {
return Collections.emptyList();
}
if (forA == null) {
forA = index(a);
}
return get(forA, lineNbr);
}
public List<PatchLineComment> getForB(final int lineNbr) {
if (lineNbr == 0) {
return Collections.emptyList();
}
if (forB == null) {
forB = index(b);
}
return get(forB, lineNbr);
}
private static List<PatchLineComment> get(
final Map<Integer, List<PatchLineComment>> m, final int i) {
final List<PatchLineComment> r = m.get(i);
return r != null ? orderComments(r) : Collections.<PatchLineComment> emptyList();
}
/**
* Order the comments based on their parent_uuid parent. It is possible to do this by
* iterating over the list only once but it's probably overkill since the number of comments
* on a given line will be small most of the time.
*
* @param comments The list of comments for a given line.
* @return The comments sorted as they should appear in the UI
*/
private static List<PatchLineComment> orderComments(List<PatchLineComment> comments) {
// Map of comments keyed by their parent. The values are lists of comments since it is
// possible for several comments to have the same parent (this can happen if two reviewers
// click Reply on the same comment at the same time). Such comments will be displayed under
// their correct parent in chronological order.
Map<String, List<PatchLineComment>> parentMap = new HashMap<String, List<PatchLineComment>>();
// It's possible to have more than one root comment if two reviewers create a comment on the
// same line at the same time
List<PatchLineComment> rootComments = new ArrayList<PatchLineComment>();
// Store all the comments in parentMap, keyed by their parent
for (PatchLineComment c : comments) {
String parentUuid = c.getParentUuid();
List<PatchLineComment> l = parentMap.get(parentUuid);
if (l == null) {
l = new ArrayList<PatchLineComment>();
parentMap.put(parentUuid, l);
}
l.add(c);
if (parentUuid == null) rootComments.add(c);
}
// Add the comments in the list, starting with the head and then going through all the
// comments that have it as a parent, and so on
List<PatchLineComment> result = new ArrayList<PatchLineComment>();
addChildren(parentMap, rootComments, result);
return result;
}
/**
* Add the comments to <code>outResult</code>, depth first
*/
private static void addChildren(Map<String, List<PatchLineComment>> parentMap,
List<PatchLineComment> children, List<PatchLineComment> outResult) {
if (children != null) {
for (PatchLineComment c : children) {
outResult.add(c);
addChildren(parentMap, parentMap.get(c.getKey().get()), outResult);
}
}
}
private Map<Integer, List<PatchLineComment>> index(
final List<PatchLineComment> in) {
final HashMap<Integer, List<PatchLineComment>> r;
r = new HashMap<Integer, List<PatchLineComment>>();
for (final PatchLineComment p : in) {
List<PatchLineComment> l = r.get(p.getLine());
if (l == null) {
l = new ArrayList<PatchLineComment>();
r.put(p.getLine(), l);
}
l.add(p);
}
return r;
}
}
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