James Moger
2015-11-22 ed552ba47c02779c270ffd62841d6d1048dade70
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/*
 * Copyright 2011 gitblit.com.
 *
 * 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.gitblit.wicket.panels;
 
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Date;
import java.util.HashMap;
import java.util.LinkedHashSet;
import java.util.List;
import java.util.Map;
import java.util.Set;
 
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.markup.html.panel.Fragment;
import org.apache.wicket.markup.repeater.Item;
import org.apache.wicket.markup.repeater.data.DataView;
import org.apache.wicket.markup.repeater.data.ListDataProvider;
import org.apache.wicket.model.StringResourceModel;
import org.eclipse.jgit.diff.DiffEntry.ChangeType;
import org.eclipse.jgit.lib.ObjectId;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;
import org.eclipse.jgit.treewalk.TreeWalk;
import org.eclipse.jgit.treewalk.filter.PathFilterGroup;
 
import com.gitblit.Constants;
import com.gitblit.Keys;
import com.gitblit.models.PathModel;
import com.gitblit.models.PathModel.PathChangeModel;
import com.gitblit.models.RefModel;
import com.gitblit.models.SubmoduleModel;
import com.gitblit.utils.JGitUtils;
import com.gitblit.utils.MarkdownUtils;
import com.gitblit.utils.StringUtils;
import com.gitblit.wicket.WicketUtils;
import com.gitblit.wicket.pages.BlobDiffPage;
import com.gitblit.wicket.pages.BlobPage;
import com.gitblit.wicket.pages.CommitDiffPage;
import com.gitblit.wicket.pages.CommitPage;
import com.gitblit.wicket.pages.GitSearchPage;
import com.gitblit.wicket.pages.HistoryPage;
import com.gitblit.wicket.pages.TreePage;
 
public class HistoryPanel extends BasePanel {
 
    private static final long serialVersionUID = 1L;
 
    private boolean hasMore;
 
    public HistoryPanel(String wicketId, final String repositoryName, final String objectId,
            final String path, Repository r, int limit, int pageOffset, boolean showRemoteRefs) {
        super(wicketId);
        boolean pageResults = limit <= 0;
        int itemsPerPage = app().settings().getInteger(Keys.web.itemsPerPage, 50);
        if (itemsPerPage <= 1) {
            itemsPerPage = 50;
        }
 
        RevCommit commit = JGitUtils.getCommit(r, objectId);
        PathModel matchingPath = null;
        Map<String, SubmoduleModel> submodules = new HashMap<String, SubmoduleModel>();
 
        if (commit == null) {
            // commit missing
            String msg = MessageFormat.format("Failed to find history of **{0}** *{1}*",
                    path, objectId);
            logger().error(msg + " " + repositoryName);
            add(new Label("commitHeader", MarkdownUtils.transformMarkdown(msg)).setEscapeModelStrings(false));
            add(new Label("breadcrumbs"));
        } else {
            // commit found
            List<PathChangeModel> paths = JGitUtils.getFilesInCommit(r, commit);
            add(new CommitHeaderPanel("commitHeader", repositoryName, commit));
            add(new PathBreadcrumbsPanel("breadcrumbs", repositoryName, path, objectId));
            for (SubmoduleModel model : JGitUtils.getSubmodules(r, commit.getTree())) {
                submodules.put(model.path, model);
            }
 
            for (PathModel p : paths) {
                if (p.path.equals(path)) {
                    matchingPath = p;
                    break;
                }
            }
            if (matchingPath == null) {
                // path not in commit
                // manually locate path in tree
                TreeWalk tw = new TreeWalk(r);
                tw.reset();
                tw.setRecursive(true);
                try {
                    tw.addTree(commit.getTree());
                    tw.setFilter(PathFilterGroup.createFromStrings(Collections.singleton(path)));
                    while (tw.next()) {
                        if (tw.getPathString().equals(path)) {
                            matchingPath = new PathChangeModel(tw.getPathString(), tw.getPathString(), 0, tw
                                .getRawMode(0), tw.getObjectId(0).getName(), commit.getId().getName(),
                                ChangeType.MODIFY);
                        }
                    }
                } catch (Exception e) {
                } finally {
                    tw.close();
                }
            }
        }
 
        final boolean isTree = matchingPath == null ? true : matchingPath.isTree();
        final boolean isSubmodule = matchingPath == null ? false : matchingPath.isSubmodule();
 
        // submodule
        final String submodulePath;
        final boolean hasSubmodule;
        if (isSubmodule) {
            SubmoduleModel submodule = getSubmodule(submodules, repositoryName, matchingPath == null ? null : matchingPath.path);
            submodulePath = submodule.gitblitPath;
            hasSubmodule = submodule.hasSubmodule;
        } else {
            submodulePath = "";
            hasSubmodule = false;
        }
 
        final Map<ObjectId, List<RefModel>> allRefs = JGitUtils.getAllRefs(r, showRemoteRefs);
        List<RevCommit> commits;
        if (pageResults) {
            // Paging result set
            commits = JGitUtils.getRevLog(r, objectId, path, pageOffset * itemsPerPage,
                    itemsPerPage);
        } else {
            // Fixed size result set
            commits = JGitUtils.getRevLog(r, objectId, path, 0, limit);
        }
 
        // inaccurate way to determine if there are more commits.
        // works unless commits.size() represents the exact end.
        hasMore = commits.size() >= itemsPerPage;
 
        final int hashLen = app().settings().getInteger(Keys.web.shortCommitIdLength, 6);
        ListDataProvider<RevCommit> dp = new ListDataProvider<RevCommit>(commits);
        DataView<RevCommit> logView = new DataView<RevCommit>("commit", dp) {
            private static final long serialVersionUID = 1L;
            int counter;
 
            @Override
            public void populateItem(final Item<RevCommit> item) {
                final RevCommit entry = item.getModelObject();
                final Date date = JGitUtils.getAuthorDate(entry);
 
                item.add(WicketUtils.createDateLabel("commitDate", date, getTimeZone(), getTimeUtils()));
 
                // author search link
                String author = entry.getAuthorIdent().getName();
                LinkPanel authorLink = new LinkPanel("commitAuthor", "list", author,
                        GitSearchPage.class,
                        WicketUtils.newSearchParameter(repositoryName, null,
                                author, Constants.SearchType.AUTHOR));
                setPersonSearchTooltip(authorLink, author, Constants.SearchType.AUTHOR);
                item.add(authorLink);
 
                // merge icon
                if (entry.getParentCount() > 1) {
                    item.add(WicketUtils.newImage("commitIcon", "commit_merge_16x16.png"));
                } else {
                    item.add(WicketUtils.newBlankImage("commitIcon"));
                }
 
                String shortMessage = entry.getShortMessage();
                String trimmedMessage = shortMessage;
                if (allRefs.containsKey(entry.getId())) {
                    trimmedMessage = StringUtils.trimString(shortMessage, Constants.LEN_SHORTLOG_REFS);
                } else {
                    trimmedMessage = StringUtils.trimString(shortMessage, Constants.LEN_SHORTLOG);
                }
                LinkPanel shortlog = new LinkPanel("commitShortMessage", "list subject",
                        trimmedMessage, CommitPage.class, WicketUtils.newObjectParameter(
                                repositoryName, entry.getName()));
                if (!shortMessage.equals(trimmedMessage)) {
                    WicketUtils.setHtmlTooltip(shortlog, shortMessage);
                }
                item.add(shortlog);
 
                item.add(new RefsPanel("commitRefs", repositoryName, entry, allRefs));
 
                if (isTree) {
                    // tree
                    item.add(new Label("hashLabel", getString("gb.tree") + "@"));
                    LinkPanel commitHash = new LinkPanel("hashLink", null, entry.getName().substring(0, hashLen),
                            TreePage.class, WicketUtils.newObjectParameter(
                                    repositoryName, entry.getName()));
                    WicketUtils.setCssClass(commitHash, "shortsha1");
                    WicketUtils.setHtmlTooltip(commitHash, entry.getName());
                    item.add(commitHash);
 
                    Fragment links = new Fragment("historyLinks", "treeLinks", this);
                    links.add(new BookmarkablePageLink<Void>("commitdiff", CommitDiffPage.class,
                            WicketUtils.newObjectParameter(repositoryName, entry.getName())));
                    item.add(links);
                } else if (isSubmodule) {
                    // submodule
                    Repository repository = app().repositories().getRepository(repositoryName);
                    String submoduleId = JGitUtils.getSubmoduleCommitId(repository, path, entry);
                    repository.close();
                    if (StringUtils.isEmpty(submoduleId)) {
                        // not a submodule at this commit, just a matching path
                        item.add(new Label("hashLabel").setVisible(false));
                        item.add(new Label("hashLink").setVisible(false));
                    } else {
                        // really a submodule
                        item.add(new Label("hashLabel", submodulePath + "@"));
                        LinkPanel commitHash = new LinkPanel("hashLink", null, submoduleId.substring(0, hashLen),
                                TreePage.class, WicketUtils.newObjectParameter(
                                        submodulePath, submoduleId));
                        WicketUtils.setCssClass(commitHash, "shortsha1");
                        WicketUtils.setHtmlTooltip(commitHash, submoduleId);
                        item.add(commitHash.setEnabled(hasSubmodule));
                    }
                    Fragment links = new Fragment("historyLinks", "treeLinks", this);
                    links.add(new BookmarkablePageLink<Void>("commitdiff", CommitDiffPage.class,
                            WicketUtils.newObjectParameter(repositoryName, entry.getName())));
                    item.add(links);
                } else {
                    // commit
                    item.add(new Label("hashLabel", getString("gb.blob") + "@"));
                    LinkPanel commitHash = new LinkPanel("hashLink", null, entry.getName().substring(0, hashLen),
                            BlobPage.class, WicketUtils.newPathParameter(
                                    repositoryName, entry.getName(), path));
                    WicketUtils.setCssClass(commitHash, "sha1");
                    WicketUtils.setHtmlTooltip(commitHash, entry.getName());
                    item.add(commitHash);
 
                    Fragment links = new Fragment("historyLinks", "blobLinks", this);
                    links.add(new BookmarkablePageLink<Void>("commitdiff", CommitDiffPage.class,
                            WicketUtils.newObjectParameter(repositoryName, entry.getName())));
                    links.add(new BookmarkablePageLink<Void>("difftocurrent", BlobDiffPage.class,
                            WicketUtils.newBlobDiffParameter(repositoryName, entry.getName(),
                                    objectId, path)).setEnabled(counter > 0));
                    item.add(links);
                }
 
                WicketUtils.setAlternatingBackground(item, counter);
                counter++;
            }
        };
        add(logView);
 
        // determine to show pager, more, or neither
        if (limit <= 0) {
            // no display limit
            add(new Label("moreHistory", "").setVisible(false));
        } else {
            if (pageResults) {
                // paging
                add(new Label("moreHistory", "").setVisible(false));
            } else {
                // more
                if (commits.size() == limit) {
                    // show more
                    add(new LinkPanel("moreHistory", "link", new StringResourceModel(
                            "gb.moreHistory", this, null), HistoryPage.class,
                            WicketUtils.newPathParameter(repositoryName, objectId, path)));
                } else {
                    // no more
                    add(new Label("moreHistory", "").setVisible(false));
                }
            }
        }
    }
 
    public boolean hasMore() {
        return hasMore;
    }
 
    protected SubmoduleModel getSubmodule(Map<String, SubmoduleModel> submodules, String repositoryName, String path) {
        SubmoduleModel model = submodules.get(path);
        if (model == null) {
            // undefined submodule?!
            model = new SubmoduleModel(path.substring(path.lastIndexOf('/') + 1), path, path);
            model.hasSubmodule = false;
            model.gitblitPath = model.name;
            return model;
        } else {
            // extract the repository name from the clone url
            List<String> patterns = app().settings().getStrings(Keys.git.submoduleUrlPatterns);
            String submoduleName = StringUtils.extractRepositoryPath(model.url, patterns.toArray(new String[0]));
 
            // determine the current path for constructing paths relative
            // to the current repository
            String currentPath = "";
            if (repositoryName.indexOf('/') > -1) {
                currentPath = repositoryName.substring(0, repositoryName.lastIndexOf('/') + 1);
            }
 
            // try to locate the submodule repository
            // prefer bare to non-bare names
            List<String> candidates = new ArrayList<String>();
 
            // relative
            candidates.add(currentPath + StringUtils.stripDotGit(submoduleName));
            candidates.add(candidates.get(candidates.size() - 1) + ".git");
 
            // relative, no subfolder
            if (submoduleName.lastIndexOf('/') > -1) {
                String name = submoduleName.substring(submoduleName.lastIndexOf('/') + 1);
                candidates.add(currentPath + StringUtils.stripDotGit(name));
                candidates.add(candidates.get(candidates.size() - 1) + ".git");
            }
 
            // absolute
            candidates.add(StringUtils.stripDotGit(submoduleName));
            candidates.add(candidates.get(candidates.size() - 1) + ".git");
 
            // absolute, no subfolder
            if (submoduleName.lastIndexOf('/') > -1) {
                String name = submoduleName.substring(submoduleName.lastIndexOf('/') + 1);
                candidates.add(StringUtils.stripDotGit(name));
                candidates.add(candidates.get(candidates.size() - 1) + ".git");
            }
 
            // create a unique, ordered set of candidate paths
            Set<String> paths = new LinkedHashSet<String>(candidates);
            for (String candidate : paths) {
                if (app().repositories().hasRepository(candidate)) {
                    model.hasSubmodule = true;
                    model.gitblitPath = candidate;
                    return model;
                }
            }
 
            // we do not have a copy of the submodule, but we need a path
            model.gitblitPath = candidates.get(0);
            return model;
        }
    }
}