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/*******************************************************************************
* Copyright (c) 2004, 2015 Jingwen Ou and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Jingwen Ou - initial API and implementation
* Tasktop Technologies - improvements
*******************************************************************************/
package org.eclipse.mylyn.internal.tasks.ui.editors;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import org.eclipse.mylyn.internal.tasks.ui.util.AttachmentUtil;
import org.eclipse.mylyn.tasks.core.IRepositoryPerson;
import org.eclipse.mylyn.tasks.core.ITaskComment;
import org.eclipse.mylyn.tasks.core.data.TaskAttribute;
/**
* @author Jingwen Ou
* @author Steffen Pingel
*/
public class CommentGroupStrategy {
public static class CommentGroup {
public static final String CURRENT = Messages.CommentGroupStrategy_Current;
public static final String OLDER = Messages.CommentGroupStrategy_Older;
public static final String RECENT = Messages.CommentGroupStrategy_Recent;
private final List<ITaskComment> comments;
private final String groupName;
private final boolean incoming;
public CommentGroup(String groupName, List<ITaskComment> comments, boolean incoming) {
this.groupName = groupName;
this.comments = comments;
this.incoming = incoming;
}
public List<TaskAttribute> getCommentAttributes() {
List<TaskAttribute> commentAttributes = new ArrayList<TaskAttribute>(comments.size());
for (ITaskComment comment : comments) {
commentAttributes.add(comment.getTaskAttribute());
}
return Collections.unmodifiableList(commentAttributes);
}
public List<ITaskComment> getComments() {
return Collections.unmodifiableList(comments);
}
public String getGroupName() {
return groupName;
}
public boolean hasIncoming() {
return incoming;
}
}
// public for testing
public static final int MAX_CURRENT = 12;
// public for testing
public static final int MAX_RECENT = 20;
/**
* Groups comments according to "Older", "Recent" and "Current".
*
* @param comments
* a list of comments to be grouped
* @param currentPersonId
* current login user id
* @return a list of groups
*/
public List<CommentGroup> groupComments(List<ITaskComment> comments, String currentPersonId) {
if (comments.size() == 0) {
return Collections.emptyList();
}
List<CommentGroup> commentGroups = new ArrayList<CommentGroup>(3);
// current
List<ITaskComment> current = new ArrayList<ITaskComment>(MAX_CURRENT);
if (comments.size() > MAX_CURRENT) {
for (int i = comments.size() - 1; i >= 0; i--) {
ITaskComment comment = comments.get(i);
if (isCurrent(current, comment, currentPersonId)) {
current.add(comment);
}
}
Collections.reverse(current);
} else {
current = comments;
}
commentGroups.add(new CommentGroup(CommentGroup.CURRENT, current, hasIncomingChanges(current)));
// recent
if (comments.size() > current.size()) {
int recentToIndex = comments.size() - current.size();
int recentFromIndex = Math.max(recentToIndex - MAX_RECENT, 0);
List<ITaskComment> recent = new ArrayList<ITaskComment>(comments.subList(recentFromIndex, recentToIndex));
if (recent.size() > 0) {
commentGroups.add(new CommentGroup(CommentGroup.RECENT, recent, hasIncomingChanges(recent)));
// the rest goes to older
if (comments.size() > current.size() + recent.size()) {
int olderToIndex = comments.size() - current.size() - recent.size();
List<ITaskComment> older = new ArrayList<ITaskComment>(comments.subList(0, olderToIndex));
commentGroups.add(new CommentGroup(CommentGroup.OLDER, older, hasIncomingChanges(older)));
}
}
}
Collections.reverse(commentGroups);
return commentGroups;
}
protected boolean hasIncomingChanges(ITaskComment taskComment) {
return false;
}
private boolean hasIncomingChanges(List<ITaskComment> comments) {
for (ITaskComment comment : comments) {
if (hasIncomingChanges(comment)) {
return true;
}
}
return false;
}
// public for testing
public boolean isCurrent(List<ITaskComment> current, ITaskComment comment, String currentPersonId) {
if (current.size() >= MAX_CURRENT) {
return false;
}
// add all incoming changes
if (hasIncomingChanges(comment)) {
return true;
}
if (!current.isEmpty()) {
// check if last comment was by current user
ITaskComment lastComment = current.get(current.size() - 1);
IRepositoryPerson lastPerson = lastComment.getAuthor();
if (lastPerson != null && lastPerson.matchesUsername(currentPersonId)) {
// bug 238038 comment #58, if the latest comment is generated automatically, look back one comment
IRepositoryPerson person = comment.getAuthor();
if (person != null && person.getPersonId().equals(currentPersonId) && lastComment.getText() != null
&& lastComment.getText().contains(AttachmentUtil.CONTEXT_DESCRIPTION)) {
return true;
}
return false;
}
}
return true;
}
}
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