Package com.gitblit.wicket.pages

Source Code of com.gitblit.wicket.pages.TicketPage

/*
* Copyright 2014 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.pages;

import java.text.DateFormat;
import java.text.MessageFormat;
import java.text.SimpleDateFormat;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Calendar;
import java.util.Collections;
import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.Set;
import java.util.TimeZone;
import java.util.TreeSet;

import javax.servlet.http.HttpServletRequest;

import org.apache.wicket.AttributeModifier;
import org.apache.wicket.Component;
import org.apache.wicket.MarkupContainer;
import org.apache.wicket.PageParameters;
import org.apache.wicket.RestartResponseException;
import org.apache.wicket.ajax.AjaxRequestTarget;
import org.apache.wicket.behavior.IBehavior;
import org.apache.wicket.behavior.SimpleAttributeModifier;
import org.apache.wicket.markup.html.basic.Label;
import org.apache.wicket.markup.html.image.ContextImage;
import org.apache.wicket.markup.html.link.BookmarkablePageLink;
import org.apache.wicket.markup.html.link.ExternalLink;
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.Model;
import org.apache.wicket.protocol.http.WebRequest;
import org.eclipse.jgit.diff.DiffEntry.ChangeType;
import org.eclipse.jgit.lib.PersonIdent;
import org.eclipse.jgit.lib.Ref;
import org.eclipse.jgit.lib.Repository;
import org.eclipse.jgit.revwalk.RevCommit;

import com.gitblit.Constants;
import com.gitblit.Constants.AccessPermission;
import com.gitblit.Keys;
import com.gitblit.git.PatchsetCommand;
import com.gitblit.git.PatchsetReceivePack;
import com.gitblit.models.PathModel.PathChangeModel;
import com.gitblit.models.RegistrantAccessPermission;
import com.gitblit.models.RepositoryModel;
import com.gitblit.models.RepositoryUrl;
import com.gitblit.models.SubmoduleModel;
import com.gitblit.models.TicketModel;
import com.gitblit.models.TicketModel.Change;
import com.gitblit.models.TicketModel.CommentSource;
import com.gitblit.models.TicketModel.Field;
import com.gitblit.models.TicketModel.Patchset;
import com.gitblit.models.TicketModel.PatchsetType;
import com.gitblit.models.TicketModel.Review;
import com.gitblit.models.TicketModel.Score;
import com.gitblit.models.TicketModel.Status;
import com.gitblit.models.UserModel;
import com.gitblit.tickets.TicketIndexer.Lucene;
import com.gitblit.tickets.TicketLabel;
import com.gitblit.tickets.TicketMilestone;
import com.gitblit.tickets.TicketResponsible;
import com.gitblit.utils.ArrayUtils;
import com.gitblit.utils.JGitUtils;
import com.gitblit.utils.JGitUtils.MergeStatus;
import com.gitblit.utils.MarkdownUtils;
import com.gitblit.utils.StringUtils;
import com.gitblit.utils.TimeUtils;
import com.gitblit.wicket.GitBlitWebSession;
import com.gitblit.wicket.WicketUtils;
import com.gitblit.wicket.panels.BasePanel.JavascriptTextPrompt;
import com.gitblit.wicket.panels.CommentPanel;
import com.gitblit.wicket.panels.DiffStatPanel;
import com.gitblit.wicket.panels.GravatarImage;
import com.gitblit.wicket.panels.IconAjaxLink;
import com.gitblit.wicket.panels.LinkPanel;
import com.gitblit.wicket.panels.ShockWaveComponent;
import com.gitblit.wicket.panels.SimpleAjaxLink;

/**
* The ticket page handles viewing and updating a ticket.
*
* @author James Moger
*
*/
public class TicketPage extends TicketBasePage {

  static final String NIL = "<nil>";

  static final String ESC_NIL = StringUtils.escapeForHtml(NIL,  false);

  final int avatarWidth = 40;

  final TicketModel ticket;

  public TicketPage(PageParameters params) {
    super(params);

    final UserModel user = GitBlitWebSession.get().getUser() == null ? UserModel.ANONYMOUS : GitBlitWebSession.get().getUser();
    final RepositoryModel repository = getRepositoryModel();
    final String id = WicketUtils.getObject(params);
    long ticketId = Long.parseLong(id);
    ticket = app().tickets().getTicket(repository, ticketId);

    if (ticket == null) {
      // ticket not found
      throw new RestartResponseException(TicketsPage.class, WicketUtils.newRepositoryParameter(repositoryName));
    }

    final List<Change> revisions = new ArrayList<Change>();
    List<Change> comments = new ArrayList<Change>();
    List<Change> statusChanges = new ArrayList<Change>();
    List<Change> discussion = new ArrayList<Change>();
    for (Change change : ticket.changes) {
      if (change.hasComment() || (change.isStatusChange() && (change.getStatus() != Status.New))) {
        discussion.add(change);
      }
      if (change.hasComment()) {
        comments.add(change);
      }
      if (change.hasPatchset()) {
        revisions.add(change);
      }
      if (change.isStatusChange() && !change.hasPatchset()) {
        statusChanges.add(change);
      }
    }

    final Change currentRevision = revisions.isEmpty() ? null : revisions.get(revisions.size() - 1);
    final Patchset currentPatchset = ticket.getCurrentPatchset();

    /*
     * TICKET HEADER
     */
    String href = urlFor(TicketsPage.class, params).toString();
    add(new ExternalLink("ticketNumber", href, "#" + ticket.number));
    Label headerStatus = new Label("headerStatus", ticket.status.toString());
    WicketUtils.setCssClass(headerStatus, getLozengeClass(ticket.status, false));
    add(headerStatus);
    add(new Label("ticketTitle", ticket.title));
    if (currentPatchset == null) {
      add(new Label("diffstat").setVisible(false));
    } else {
      // calculate the current diffstat of the patchset
      add(new DiffStatPanel("diffstat", ticket.insertions, ticket.deletions));
    }


    /*
     * TAB TITLES
     */
    add(new Label("commentCount", "" + comments.size()).setVisible(!comments.isEmpty()));
    add(new Label("commitCount", "" + (currentPatchset == null ? 0 : currentPatchset.commits)).setVisible(currentPatchset != null));


    /*
     * TICKET AUTHOR and DATE (DISCUSSION TAB)
     */
    UserModel createdBy = app().users().getUserModel(ticket.createdBy);
    if (createdBy == null) {
      add(new Label("whoCreated", ticket.createdBy));
    } else {
      add(new LinkPanel("whoCreated", null, createdBy.getDisplayName(),
          UserPage.class, WicketUtils.newUsernameParameter(createdBy.username)));
    }

    if (ticket.isProposal()) {
      // clearly indicate this is a change ticket
      add(new Label("creationMessage", getString("gb.proposedThisChange")));
    } else {
      // standard ticket
      add(new Label("creationMessage", getString("gb.createdThisTicket")));
    }

    String dateFormat = app().settings().getString(Keys.web.datestampLongFormat, "EEEE, MMMM d, yyyy");
    String timestampFormat = app().settings().getString(Keys.web.datetimestampLongFormat, "EEEE, MMMM d, yyyy");
    final TimeZone timezone = getTimeZone();
    final DateFormat df = new SimpleDateFormat(dateFormat);
    df.setTimeZone(timezone);
    final DateFormat tsf = new SimpleDateFormat(timestampFormat);
    tsf.setTimeZone(timezone);
    final Calendar cal = Calendar.getInstance(timezone);

    String fuzzydate;
    TimeUtils tu = getTimeUtils();
    Date createdDate = ticket.created;
    if (TimeUtils.isToday(createdDate, timezone)) {
      fuzzydate = tu.today();
    } else if (TimeUtils.isYesterday(createdDate, timezone)) {
      fuzzydate = tu.yesterday();
    } else {
      // calculate a fuzzy time ago date
          cal.setTime(createdDate);
          cal.set(Calendar.HOUR_OF_DAY, 0);
          cal.set(Calendar.MINUTE, 0);
          cal.set(Calendar.SECOND, 0);
          cal.set(Calendar.MILLISECOND, 0);
          createdDate = cal.getTime();
      fuzzydate = getTimeUtils().timeAgo(createdDate);
    }
    Label when = new Label("whenCreated", fuzzydate + ", " + df.format(createdDate));
    WicketUtils.setHtmlTooltip(when, tsf.format(ticket.created));
    add(when);

    String exportHref = urlFor(ExportTicketPage.class, params).toString();
    add(new ExternalLink("exportJson", exportHref, "json"));


    /*
     * RESPONSIBLE (DISCUSSION TAB)
     */
    if (StringUtils.isEmpty(ticket.responsible)) {
      add(new Label("responsible"));
    } else {
      UserModel responsible = app().users().getUserModel(ticket.responsible);
      if (responsible == null) {
        add(new Label("responsible", ticket.responsible));
      } else {
        add(new LinkPanel("responsible", null, responsible.getDisplayName(),
            UserPage.class, WicketUtils.newUsernameParameter(responsible.username)));
      }
    }

    /*
     * MILESTONE PROGRESS (DISCUSSION TAB)
     */
    if (StringUtils.isEmpty(ticket.milestone)) {
      add(new Label("milestone"));
    } else {
      // link to milestone query
      TicketMilestone milestone = app().tickets().getMilestone(repository, ticket.milestone);
      PageParameters milestoneParameters = new PageParameters();
      milestoneParameters.put("r", repositoryName);
      milestoneParameters.put(Lucene.milestone.name(), ticket.milestone);
      int progress = 0;
      int open = 0;
      int closed = 0;
      if (milestone != null) {
        progress = milestone.getProgress();
        open = milestone.getOpenTickets();
        closed = milestone.getClosedTickets();
      }

      Fragment milestoneProgress = new Fragment("milestone", "milestoneProgressFragment", this);
      milestoneProgress.add(new LinkPanel("link", null, ticket.milestone, TicketsPage.class, milestoneParameters));
      Label label = new Label("progress");
      WicketUtils.setCssStyle(label, "width:" + progress + "%;");
      milestoneProgress.add(label);
      WicketUtils.setHtmlTooltip(milestoneProgress, MessageFormat.format(getString("gb.milestoneProgress"), open, closed));
      add(milestoneProgress);
    }


    /*
     * TICKET DESCRIPTION (DISCUSSION TAB)
     */
    String desc;
    if (StringUtils.isEmpty(ticket.body)) {
      desc = getString("gb.noDescriptionGiven");
    } else {
      desc = MarkdownUtils.transformGFM(app().settings(), ticket.body, ticket.repository);
    }
    add(new Label("ticketDescription", desc).setEscapeModelStrings(false));


    /*
     * PARTICIPANTS (DISCUSSION TAB)
     */
    if (app().settings().getBoolean(Keys.web.allowGravatar, true)) {
      // gravatar allowed
      List<String> participants = ticket.getParticipants();
      add(new Label("participantsLabel", MessageFormat.format(getString(participants.size() > 1 ? "gb.nParticipants" : "gb.oneParticipant"),
          "<b>" + participants.size() + "</b>")).setEscapeModelStrings(false));
      ListDataProvider<String> participantsDp = new ListDataProvider<String>(participants);
      DataView<String> participantsView = new DataView<String>("participants", participantsDp) {
        private static final long serialVersionUID = 1L;

        @Override
        public void populateItem(final Item<String> item) {
          String username = item.getModelObject();
          UserModel user = app().users().getUserModel(username);
          if (user == null) {
            user = new UserModel(username);
          }
          item.add(new GravatarImage("participant", user.getDisplayName(),
              user.emailAddress, null, 25, true));
        }
      };
      add(participantsView);
    } else {
      // gravatar prohibited
      add(new Label("participantsLabel").setVisible(false));
      add(new Label("participants").setVisible(false));
    }


    /*
     * LARGE STATUS INDICATOR WITH ICON (DISCUSSION TAB->SIDE BAR)
     */
    Fragment ticketStatus = new Fragment("ticketStatus", "ticketStatusFragment", this);
    Label ticketIcon = getStateIcon("ticketIcon", ticket);
    ticketStatus.add(ticketIcon);
    ticketStatus.add(new Label("ticketStatus", ticket.status.toString()));
    WicketUtils.setCssClass(ticketStatus, getLozengeClass(ticket.status, false));
    add(ticketStatus);


    /*
     * UPDATE FORM (DISCUSSION TAB)
     */
    if (user.canEdit(ticket, repository) && app().tickets().isAcceptingTicketUpdates(repository)) {
      if (user.canAdmin(ticket, repository) && ticket.isOpen()) {
        /*
         * OPEN TICKET
         */
        Fragment controls = new Fragment("controls", "openControlsFragment", this);

        /*
         * STATUS
         */
        List<Status> choices = new ArrayList<Status>();
        if (ticket.isProposal()) {
          choices.addAll(Arrays.asList(TicketModel.Status.proposalWorkflow));
        } else if (ticket.isBug()) {
          choices.addAll(Arrays.asList(TicketModel.Status.bugWorkflow));
        } else {
          choices.addAll(Arrays.asList(TicketModel.Status.requestWorkflow));
        }
        choices.remove(ticket.status);

        ListDataProvider<Status> workflowDp = new ListDataProvider<Status>(choices);
        DataView<Status> statusView = new DataView<Status>("newStatus", workflowDp) {
          private static final long serialVersionUID = 1L;

          @Override
          public void populateItem(final Item<Status> item) {
            SimpleAjaxLink<Status> link = new SimpleAjaxLink<Status>("link", item.getModel()) {

              private static final long serialVersionUID = 1L;

              @Override
              public void onClick(AjaxRequestTarget target) {
                Status status = getModel().getObject();
                Change change = new Change(user.username);
                change.setField(Field.status, status);
                if (!ticket.isWatching(user.username)) {
                  change.watch(user.username);
                }
                TicketModel update = app().tickets().updateTicket(repository, ticket.number, change);
                app().tickets().createNotifier().sendMailing(update);
                setResponsePage(TicketsPage.class, getPageParameters());
              }
            };
            String css = getStatusClass(item.getModel().getObject());
            WicketUtils.setCssClass(link, css);
            item.add(link);
          }
        };
        controls.add(statusView);

        /*
         * RESPONSIBLE LIST
         */
        Set<String> userlist = new TreeSet<String>(ticket.getParticipants());
        for (RegistrantAccessPermission rp : app().repositories().getUserAccessPermissions(getRepositoryModel())) {
          if (rp.permission.atLeast(AccessPermission.PUSH) && !rp.isTeam()) {
            userlist.add(rp.registrant);
          }
        }
        List<TicketResponsible> responsibles = new ArrayList<TicketResponsible>();
        if (!StringUtils.isEmpty(ticket.responsible)) {
          // exclude the current responsible
          userlist.remove(ticket.responsible);
        }
        for (String username : userlist) {
          UserModel u = app().users().getUserModel(username);
          if (u != null) {
            responsibles.add(new TicketResponsible(u));
          }
        }
        Collections.sort(responsibles);
        responsibles.add(new TicketResponsible(ESC_NIL, "", ""));
        ListDataProvider<TicketResponsible> responsibleDp = new ListDataProvider<TicketResponsible>(responsibles);
        DataView<TicketResponsible> responsibleView = new DataView<TicketResponsible>("newResponsible", responsibleDp) {
          private static final long serialVersionUID = 1L;

          @Override
          public void populateItem(final Item<TicketResponsible> item) {
            SimpleAjaxLink<TicketResponsible> link = new SimpleAjaxLink<TicketResponsible>("link", item.getModel()) {

              private static final long serialVersionUID = 1L;

              @Override
              public void onClick(AjaxRequestTarget target) {
                TicketResponsible responsible = getModel().getObject();
                Change change = new Change(user.username);
                change.setField(Field.responsible, responsible.username);
                if (!StringUtils.isEmpty(responsible.username)) {
                  if (!ticket.isWatching(responsible.username)) {
                    change.watch(responsible.username);
                  }
                }
                if (!ticket.isWatching(user.username)) {
                  change.watch(user.username);
                }
                TicketModel update = app().tickets().updateTicket(repository, ticket.number, change);
                app().tickets().createNotifier().sendMailing(update);
                setResponsePage(TicketsPage.class, getPageParameters());
              }
            };
            item.add(link);
          }
        };
        controls.add(responsibleView);

        /*
         * MILESTONE LIST
         */
        List<TicketMilestone> milestones = app().tickets().getMilestones(repository, Status.Open);
        if (!StringUtils.isEmpty(ticket.milestone)) {
          for (TicketMilestone milestone : milestones) {
            if (milestone.name.equals(ticket.milestone)) {
              milestones.remove(milestone);
              break;
            }
          }
        }
        milestones.add(new TicketMilestone(ESC_NIL));
        ListDataProvider<TicketMilestone> milestoneDp = new ListDataProvider<TicketMilestone>(milestones);
        DataView<TicketMilestone> milestoneView = new DataView<TicketMilestone>("newMilestone", milestoneDp) {
          private static final long serialVersionUID = 1L;

          @Override
          public void populateItem(final Item<TicketMilestone> item) {
            SimpleAjaxLink<TicketMilestone> link = new SimpleAjaxLink<TicketMilestone>("link", item.getModel()) {

              private static final long serialVersionUID = 1L;

              @Override
              public void onClick(AjaxRequestTarget target) {
                TicketMilestone milestone = getModel().getObject();
                Change change = new Change(user.username);
                if (NIL.equals(milestone.name) || ESC_NIL.equals(milestone.name)) {
                  change.setField(Field.milestone, "");
                } else {
                  change.setField(Field.milestone, milestone.name);
                }
                if (!ticket.isWatching(user.username)) {
                  change.watch(user.username);
                }
                TicketModel update = app().tickets().updateTicket(repository, ticket.number, change);
                app().tickets().createNotifier().sendMailing(update);
                setResponsePage(TicketsPage.class, getPageParameters());
              }
            };
            item.add(link);
          }
        };
        controls.add(milestoneView);

        String editHref = urlFor(EditTicketPage.class, params).toString();
        controls.add(new ExternalLink("editLink", editHref, getString("gb.edit")));

        add(controls);
      } else {
        /*
         * CLOSED TICKET
         */
        Fragment controls = new Fragment("controls", "closedControlsFragment", this);

        String editHref = urlFor(EditTicketPage.class, params).toString();
        controls.add(new ExternalLink("editLink", editHref, getString("gb.edit")));

        add(controls);
      }
    } else {
      add(new Label("controls").setVisible(false));
    }


    /*
     * TICKET METADATA
     */
    add(new Label("ticketType", ticket.type.toString()));
    if (StringUtils.isEmpty(ticket.topic)) {
      add(new Label("ticketTopic").setVisible(false));
    } else {
      // process the topic using the bugtraq config to link things
      String topic = bugtraqProcessor().processPlainCommitMessage(getRepository(), repositoryName, ticket.topic);
      add(new Label("ticketTopic", topic).setEscapeModelStrings(false));
    }


    /*
     * VOTERS
     */
    List<String> voters = ticket.getVoters();
    Label votersCount = new Label("votes", "" + voters.size());
    if (voters.size() == 0) {
      WicketUtils.setCssClass(votersCount, "badge");
    } else {
      WicketUtils.setCssClass(votersCount, "badge badge-info");
    }
    add(votersCount);
    if (user.isAuthenticated && app().tickets().isAcceptingTicketUpdates(repository)) {
      Model<String> model;
      if (ticket.isVoter(user.username)) {
        model = Model.of(getString("gb.removeVote"));
      } else {
        model = Model.of(MessageFormat.format(getString("gb.vote"), ticket.type.toString()));
      }
      SimpleAjaxLink<String> link = new SimpleAjaxLink<String>("voteLink", model) {

        private static final long serialVersionUID = 1L;

        @Override
        public void onClick(AjaxRequestTarget target) {
          Change change = new Change(user.username);
          if (ticket.isVoter(user.username)) {
            change.unvote(user.username);
          } else {
            change.vote(user.username);
          }
          app().tickets().updateTicket(repository, ticket.number, change);
          setResponsePage(TicketsPage.class, getPageParameters());
        }
      };
      add(link);
    } else {
      add(new Label("voteLink").setVisible(false));
    }


    /*
     * WATCHERS
     */
    List<String> watchers = ticket.getWatchers();
    Label watchersCount = new Label("watchers", "" + watchers.size());
    if (watchers.size() == 0) {
      WicketUtils.setCssClass(watchersCount, "badge");
    } else {
      WicketUtils.setCssClass(watchersCount, "badge badge-info");
    }
    add(watchersCount);
    if (user.isAuthenticated && app().tickets().isAcceptingTicketUpdates(repository)) {
      Model<String> model;
      if (ticket.isWatching(user.username)) {
        model = Model.of(getString("gb.stopWatching"));
      } else {
        model = Model.of(MessageFormat.format(getString("gb.watch"), ticket.type.toString()));
      }
      SimpleAjaxLink<String> link = new SimpleAjaxLink<String>("watchLink", model) {

        private static final long serialVersionUID = 1L;

        @Override
        public void onClick(AjaxRequestTarget target) {
          Change change = new Change(user.username);
          if (ticket.isWatching(user.username)) {
            change.unwatch(user.username);
          } else {
            change.watch(user.username);
          }
          app().tickets().updateTicket(repository, ticket.number, change);
          setResponsePage(TicketsPage.class, getPageParameters());
        }
      };
      add(link);
    } else {
      add(new Label("watchLink").setVisible(false));
    }


    /*
     * TOPIC & LABELS (DISCUSSION TAB->SIDE BAR)
     */
    ListDataProvider<String> labelsDp = new ListDataProvider<String>(ticket.getLabels());
    DataView<String> labelsView = new DataView<String>("labels", labelsDp) {
      private static final long serialVersionUID = 1L;

      @Override
      public void populateItem(final Item<String> item) {
        final String value = item.getModelObject();
        Label label = new Label("label", value);
        TicketLabel tLabel = app().tickets().getLabel(repository, value);
        String background = MessageFormat.format("background-color:{0};", tLabel.color);
        label.add(new SimpleAttributeModifier("style", background));
        item.add(label);
      }
    };

    add(labelsView);


    /*
     * COMMENTS & STATUS CHANGES (DISCUSSION TAB)
     */
    if (comments.size() == 0) {
      add(new Label("discussion").setVisible(false));
    } else {
      Fragment discussionFragment = new Fragment("discussion", "discussionFragment", this);
      ListDataProvider<Change> discussionDp = new ListDataProvider<Change>(discussion);
      DataView<Change> discussionView = new DataView<Change>("discussion", discussionDp) {
        private static final long serialVersionUID = 1L;

        @Override
        public void populateItem(final Item<Change> item) {
          final Change entry = item.getModelObject();
          if (entry.isMerge()) {
            /*
             * MERGE
             */
            String resolvedBy = entry.getString(Field.mergeSha);

            // identify the merged patch, it is likely the last
            Patchset mergedPatch = null;
            for (Change c : revisions) {
              if (c.patchset.tip.equals(resolvedBy)) {
                mergedPatch = c.patchset;
                break;
              }
            }

            String commitLink;
            if (mergedPatch == null) {
              // shouldn't happen, but just-in-case
              int len = app().settings().getInteger(Keys.web.shortCommitIdLength, 6);
              commitLink = resolvedBy.substring(0, len);
            } else {
              // expected result
              commitLink = mergedPatch.toString();
            }

            Fragment mergeFragment = new Fragment("entry", "mergeFragment", this);
            mergeFragment.add(new LinkPanel("commitLink", null, commitLink,
                CommitPage.class, WicketUtils.newObjectParameter(repositoryName, resolvedBy)));
            mergeFragment.add(new Label("toBranch", MessageFormat.format(getString("gb.toBranch"),
                "<b>" + ticket.mergeTo + "</b>")).setEscapeModelStrings(false));
            addUserAttributions(mergeFragment, entry, 0);
            addDateAttributions(mergeFragment, entry);

            item.add(mergeFragment);
          } else if (entry.isStatusChange()) {
            /*
             *  STATUS CHANGE
             */
            Fragment frag = new Fragment("entry", "statusFragment", this);
            Label status = new Label("statusChange", entry.getStatus().toString());
            String css = getLozengeClass(entry.getStatus(), false);
            WicketUtils.setCssClass(status, css);
            for (IBehavior b : status.getBehaviors()) {
              if (b instanceof SimpleAttributeModifier) {
                SimpleAttributeModifier sam = (SimpleAttributeModifier) b;
                if ("class".equals(sam.getAttribute())) {
                  status.add(new SimpleAttributeModifier("class", "status-change " + sam.getValue()));
                  break;
                }
              }
            }
            frag.add(status);
            addUserAttributions(frag, entry, avatarWidth);
            addDateAttributions(frag, entry);
            item.add(frag);
          } else {
            /*
             * COMMENT
             */
            String comment = MarkdownUtils.transformGFM(app().settings(), entry.comment.text, repositoryName);
            Fragment frag = new Fragment("entry", "commentFragment", this);
            Label commentIcon = new Label("commentIcon");
            if (entry.comment.src == CommentSource.Email) {
              WicketUtils.setCssClass(commentIcon, "iconic-mail");
            } else {
              WicketUtils.setCssClass(commentIcon, "iconic-comment-alt2-stroke");
            }
            frag.add(commentIcon);
            frag.add(new Label("comment", comment).setEscapeModelStrings(false));
            addUserAttributions(frag, entry, avatarWidth);
            addDateAttributions(frag, entry);
            item.add(frag);
          }
        }
      };
      discussionFragment.add(discussionView);
      add(discussionFragment);
    }

    /*
     * ADD COMMENT PANEL
     */
    if (UserModel.ANONYMOUS.equals(user)
        || !repository.isBare
        || repository.isFrozen
        || repository.isMirror) {

      // prohibit comments for anonymous users, local working copy repos,
      // frozen repos, and mirrors
      add(new Label("newComment").setVisible(false));
    } else {
      // permit user to comment
      Fragment newComment = new Fragment("newComment", "newCommentFragment", this);
      GravatarImage img = new GravatarImage("newCommentAvatar", user.username, user.emailAddress,
          "gravatar-round", avatarWidth, true);
      newComment.add(img);
      CommentPanel commentPanel = new CommentPanel("commentPanel", user, ticket, null, TicketsPage.class);
      commentPanel.setRepository(repositoryName);
      newComment.add(commentPanel);
      add(newComment);
    }


    /*
     *  PATCHSET TAB
     */
    if (currentPatchset == null) {
      // no patchset available
      RepositoryUrl repoUrl = getRepositoryUrl(user, repository);
      boolean canPropose = repoUrl != null && repoUrl.permission.atLeast(AccessPermission.CLONE) && !UserModel.ANONYMOUS.equals(user);
      if (ticket.isOpen() && app().tickets().isAcceptingNewPatchsets(repository) && canPropose) {
        // ticket & repo will accept a proposal patchset
        // show the instructions for proposing a patchset
        Fragment changeIdFrag = new Fragment("patchset", "proposeFragment", this);
        changeIdFrag.add(new Label("proposeInstructions", MarkdownUtils.transformMarkdown(getString("gb.proposeInstructions"))).setEscapeModelStrings(false));
        changeIdFrag.add(new Label("ptWorkflow", MessageFormat.format(getString("gb.proposeWith"), "Barnum")));
        changeIdFrag.add(new Label("ptWorkflowSteps", getProposeWorkflow("propose_pt.md", repoUrl.url, ticket.number)).setEscapeModelStrings(false));
        changeIdFrag.add(new Label("gitWorkflow", MessageFormat.format(getString("gb.proposeWith"), "Git")));
        changeIdFrag.add(new Label("gitWorkflowSteps", getProposeWorkflow("propose_git.md", repoUrl.url, ticket.number)).setEscapeModelStrings(false));
        add(changeIdFrag);
      } else {
        // explain why you can't propose a patchset
        Fragment fragment = new Fragment("patchset", "canNotProposeFragment", this);
        String reason = "";
        if (ticket.isClosed()) {
          reason = getString("gb.ticketIsClosed");
        } else if (repository.isMirror) {
          reason = getString("gb.repositoryIsMirror");
        } else if (repository.isFrozen) {
          reason = getString("gb.repositoryIsFrozen");
        } else if (!repository.acceptNewPatchsets) {
          reason = getString("gb.repositoryDoesNotAcceptPatchsets");
        } else if (!canPropose) {
          if (UserModel.ANONYMOUS.equals(user)) {
            reason = getString("gb.anonymousCanNotPropose");
          } else {
            reason = getString("gb.youDoNotHaveClonePermission");
          }
        } else {
          reason = getString("gb.serverDoesNotAcceptPatchsets");
        }
        fragment.add(new Label("reason", reason));
        add(fragment);
      }
    } else {
      // show current patchset
      Fragment patchsetFrag = new Fragment("patchset", "patchsetFragment", this);
      patchsetFrag.add(new Label("commitsInPatchset", MessageFormat.format(getString("gb.commitsInPatchsetN"), currentPatchset.number)));

      patchsetFrag.add(createMergePanel(user, repository));

      if (ticket.isOpen()) {
        // current revision
        MarkupContainer panel = createPatchsetPanel("panel", repository, user);
        patchsetFrag.add(panel);
        addUserAttributions(patchsetFrag, currentRevision, avatarWidth);
        addUserAttributions(panel, currentRevision, 0);
        addDateAttributions(panel, currentRevision);
      } else {
        // current revision
        patchsetFrag.add(new Label("panel").setVisible(false));
      }

      // commits
      List<RevCommit> commits = JGitUtils.getRevLog(getRepository(), currentPatchset.base, currentPatchset.tip);
      ListDataProvider<RevCommit> commitsDp = new ListDataProvider<RevCommit>(commits);
      DataView<RevCommit> commitsView = new DataView<RevCommit>("commit", commitsDp) {
        private static final long serialVersionUID = 1L;

        @Override
        public void populateItem(final Item<RevCommit> item) {
          RevCommit commit = item.getModelObject();
          PersonIdent author = commit.getAuthorIdent();
          item.add(new GravatarImage("authorAvatar", author.getName(), author.getEmailAddress(), null, 16, false));
          item.add(new Label("author", commit.getAuthorIdent().getName()));
          item.add(new LinkPanel("commitId", null, getShortObjectId(commit.getName()),
              CommitPage.class, WicketUtils.newObjectParameter(repositoryName, commit.getName()), true));
          item.add(new LinkPanel("diff", "link", getString("gb.diff"), CommitDiffPage.class,
              WicketUtils.newObjectParameter(repositoryName, commit.getName()), true));
          item.add(new Label("title", StringUtils.trimString(commit.getShortMessage(), Constants.LEN_SHORTLOG_REFS)));
          item.add(WicketUtils.createDateLabel("commitDate", JGitUtils.getCommitDate(commit), GitBlitWebSession
              .get().getTimezone(), getTimeUtils(), false));
          item.add(new DiffStatPanel("commitDiffStat", 0, 0, true));
        }
      };
      patchsetFrag.add(commitsView);
      add(patchsetFrag);
    }


    /*
     * ACTIVITY TAB
     */
    Fragment revisionHistory = new Fragment("activity", "activityFragment", this);
    List<Change> events = new ArrayList<Change>(ticket.changes);
    Collections.sort(events);
    Collections.reverse(events);
    ListDataProvider<Change> eventsDp = new ListDataProvider<Change>(events);
    DataView<Change> eventsView = new DataView<Change>("event", eventsDp) {
      private static final long serialVersionUID = 1L;

      @Override
      public void populateItem(final Item<Change> item) {
        Change event = item.getModelObject();

        addUserAttributions(item, event, 16);

        if (event.hasPatchset()) {
          // patchset
          Patchset patchset = event.patchset;
          String what;
          if (event.isStatusChange() && (Status.New == event.getStatus())) {
            what = getString("gb.proposedThisChange");
          } else if (patchset.rev == 1) {
            what = MessageFormat.format(getString("gb.uploadedPatchsetN"), patchset.number);
          } else {
            if (patchset.added == 1) {
              what = getString("gb.addedOneCommit");
            } else {
              what = MessageFormat.format(getString("gb.addedNCommits"), patchset.added);
            }
          }
          item.add(new Label("what", what));

          LinkPanel psr = new LinkPanel("patchsetRevision", null, patchset.number + "-" + patchset.rev,
              ComparePage.class, WicketUtils.newRangeParameter(repositoryName, patchset.parent == null ? patchset.base : patchset.parent, patchset.tip), true);
          WicketUtils.setHtmlTooltip(psr, patchset.toString());
          item.add(psr);
          String typeCss = getPatchsetTypeCss(patchset.type);
          Label typeLabel = new Label("patchsetType", patchset.type.toString());
          if (typeCss == null) {
            typeLabel.setVisible(false);
          } else {
            WicketUtils.setCssClass(typeLabel, typeCss);
          }
          item.add(typeLabel);

          // show commit diffstat
          item.add(new DiffStatPanel("patchsetDiffStat", patchset.insertions, patchset.deletions, patchset.rev > 1));
        } else if (event.hasComment()) {
          // comment
          item.add(new Label("what", getString("gb.commented")));
          item.add(new Label("patchsetRevision").setVisible(false));
          item.add(new Label("patchsetType").setVisible(false));
          item.add(new Label("patchsetDiffStat").setVisible(false));
        } else if (event.hasReview()) {
          // review
          String score;
          switch (event.review.score) {
          case approved:
            score = "<span style='color:darkGreen'>" + getScoreDescription(event.review.score) + "</span>";
            break;
          case vetoed:
            score = "<span style='color:darkRed'>" + getScoreDescription(event.review.score) + "</span>";
            break;
          default:
            score = getScoreDescription(event.review.score);
          }
          item.add(new Label("what", MessageFormat.format(getString("gb.reviewedPatchsetRev"),
              event.review.patchset, event.review.rev, score))
              .setEscapeModelStrings(false));
          item.add(new Label("patchsetRevision").setVisible(false));
          item.add(new Label("patchsetType").setVisible(false));
          item.add(new Label("patchsetDiffStat").setVisible(false));
        } else {
          // field change
          item.add(new Label("patchsetRevision").setVisible(false));
          item.add(new Label("patchsetType").setVisible(false));
          item.add(new Label("patchsetDiffStat").setVisible(false));

          String what = "";
          if (event.isStatusChange()) {
          switch (event.getStatus()) {
          case New:
            if (ticket.isProposal()) {
              what = getString("gb.proposedThisChange");
            } else {
              what = getString("gb.createdThisTicket");
            }
            break;
          default:
            break;
          }
          }
          item.add(new Label("what", what).setVisible(what.length() > 0));
        }

        addDateAttributions(item, event);

        if (event.hasFieldChanges()) {
          StringBuilder sb = new StringBuilder();
          sb.append("<table class=\"summary\"><tbody>");
          for (Map.Entry<Field, String> entry : event.fields.entrySet()) {
            String value;
            switch (entry.getKey()) {
              case body:
                String body = entry.getValue();
                if (event.isStatusChange() && Status.New == event.getStatus() && StringUtils.isEmpty(body)) {
                  // ignore initial empty description
                  continue;
                }
                // trim body changes
                if (StringUtils.isEmpty(body)) {
                  value = "<i>" + ESC_NIL + "</i>";
                } else {
                  value = StringUtils.trimString(body, Constants.LEN_SHORTLOG_REFS);
                }
                break;
              case status:
                // special handling for status
                Status status = event.getStatus();
                String css = getLozengeClass(status, true);
                value = String.format("<span class=\"%1$s\">%2$s</span>", css, status.toString());
                break;
              default:
                value = StringUtils.isEmpty(entry.getValue()) ? ("<i>" + ESC_NIL + "</i>") : StringUtils.escapeForHtml(entry.getValue(), false);
                break;
            }
            sb.append("<tr><th style=\"width:70px;\">");
            try {
              sb.append(getString("gb." + entry.getKey().name()));
            } catch (Exception e) {
              sb.append(entry.getKey().name());
            }
            sb.append("</th><td>");
            sb.append(value);
            sb.append("</td></tr>");
          }
          sb.append("</tbody></table>");
          item.add(new Label("fields", sb.toString()).setEscapeModelStrings(false));
        } else {
          item.add(new Label("fields").setVisible(false));
        }
      }
    };
    revisionHistory.add(eventsView);
    add(revisionHistory);
  }

  protected void addUserAttributions(MarkupContainer container, Change entry, int avatarSize) {
    UserModel commenter = app().users().getUserModel(entry.author);
    if (commenter == null) {
      // unknown user
      container.add(new GravatarImage("changeAvatar", entry.author,
          entry.author, null, avatarSize, false).setVisible(avatarSize > 0));
      container.add(new Label("changeAuthor", entry.author.toLowerCase()));
    } else {
      // known user
      container.add(new GravatarImage("changeAvatar", commenter.getDisplayName(),
          commenter.emailAddress, avatarSize > 24 ? "gravatar-round" : null,
              avatarSize, true).setVisible(avatarSize > 0));
      container.add(new LinkPanel("changeAuthor", null, commenter.getDisplayName(),
          UserPage.class, WicketUtils.newUsernameParameter(commenter.username)));
    }
  }

  protected void addDateAttributions(MarkupContainer container, Change entry) {
    container.add(WicketUtils.createDateLabel("changeDate", entry.date, GitBlitWebSession
        .get().getTimezone(), getTimeUtils(), false));

    // set the id attribute
    if (entry.hasComment()) {
      container.setOutputMarkupId(true);
      container.add(new AttributeModifier("id", Model.of(entry.getId())));
      ExternalLink link = new ExternalLink("changeLink", "#" + entry.getId());
      container.add(link);
    } else {
      container.add(new Label("changeLink").setVisible(false));
    }
  }

  protected String getProposeWorkflow(String resource, String url, long ticketId) {
    String md = readResource(resource);
    md = md.replace("${url}", url);
    md = md.replace("${repo}", StringUtils.getLastPathElement(StringUtils.stripDotGit(repositoryName)));
    md = md.replace("${ticketId}", "" + ticketId);
    md = md.replace("${patchset}", "" + 1);
    md = md.replace("${reviewBranch}", Repository.shortenRefName(PatchsetCommand.getTicketBranch(ticketId)));
    String integrationBranch = Repository.shortenRefName(getRepositoryModel().mergeTo);
    if (!StringUtils.isEmpty(ticket.mergeTo)) {
      integrationBranch = ticket.mergeTo;
    }
    md = md.replace("${integrationBranch}", integrationBranch);
    return MarkdownUtils.transformMarkdown(md);
  }

  protected Fragment createPatchsetPanel(String wicketId, RepositoryModel repository, UserModel user) {
    final Patchset currentPatchset = ticket.getCurrentPatchset();
    List<Patchset> patchsets = new ArrayList<Patchset>(ticket.getPatchsetRevisions(currentPatchset.number));
    patchsets.remove(currentPatchset);
    Collections.reverse(patchsets);

    Fragment panel = new Fragment(wicketId, "collapsiblePatchsetFragment", this);

    // patchset header
    String ps = "<b>" + currentPatchset.number + "</b>";
    if (currentPatchset.rev == 1) {
      panel.add(new Label("uploadedWhat", MessageFormat.format(getString("gb.uploadedPatchsetN"), ps)).setEscapeModelStrings(false));
    } else {
      String rev = "<b>" + currentPatchset.rev + "</b>";
      panel.add(new Label("uploadedWhat", MessageFormat.format(getString("gb.uploadedPatchsetNRevisionN"), ps, rev)).setEscapeModelStrings(false));
    }
    panel.add(new LinkPanel("patchId", null, "rev " + currentPatchset.rev,
        CommitPage.class, WicketUtils.newObjectParameter(repositoryName, currentPatchset.tip), true));

    // compare menu
    panel.add(new LinkPanel("compareMergeBase", null, getString("gb.compareToMergeBase"),
        ComparePage.class, WicketUtils.newRangeParameter(repositoryName, currentPatchset.base, currentPatchset.tip), true));

    ListDataProvider<Patchset> compareMenuDp = new ListDataProvider<Patchset>(patchsets);
    DataView<Patchset> compareMenu = new DataView<Patchset>("comparePatch", compareMenuDp) {
      private static final long serialVersionUID = 1L;
      @Override
      public void populateItem(final Item<Patchset> item) {
        Patchset patchset = item.getModelObject();
        LinkPanel link = new LinkPanel("compareLink", null,
            MessageFormat.format(getString("gb.compareToN"), patchset.number + "-" + patchset.rev),
            ComparePage.class, WicketUtils.newRangeParameter(getRepositoryModel().name,
                patchset.tip, currentPatchset.tip), true);
        item.add(link);

      }
    };
    panel.add(compareMenu);


    // reviews
    List<Change> reviews = ticket.getReviews(currentPatchset);
    ListDataProvider<Change> reviewsDp = new ListDataProvider<Change>(reviews);
    DataView<Change> reviewsView = new DataView<Change>("reviews", reviewsDp) {
      private static final long serialVersionUID = 1L;

      @Override
      public void populateItem(final Item<Change> item) {
        Change change = item.getModelObject();
        final String username = change.author;
        UserModel user = app().users().getUserModel(username);
        if (user == null) {
          item.add(new Label("reviewer", username));
        } else {
          item.add(new LinkPanel("reviewer", null, user.getDisplayName(),
              UserPage.class, WicketUtils.newUsernameParameter(username)));
        }

        // indicate review score
        Review review = change.review;
        Label scoreLabel = new Label("score");
        String scoreClass = getScoreClass(review.score);
        String tooltip = getScoreDescription(review.score);
        WicketUtils.setCssClass(scoreLabel, scoreClass);
        if (!StringUtils.isEmpty(tooltip)) {
          WicketUtils.setHtmlTooltip(scoreLabel, tooltip);
        }
        item.add(scoreLabel);
      }
    };
    panel.add(reviewsView);


    if (ticket.isOpen() && user.canReviewPatchset(repository) && app().tickets().isAcceptingTicketUpdates(repository)) {
      // can only review open tickets
      Review myReview = null;
      for (Change change : ticket.getReviews(currentPatchset)) {
        if (change.author.equals(user.username)) {
          myReview = change.review;
        }
      }

      // user can review, add review controls
      Fragment reviewControls = new Fragment("reviewControls", "reviewControlsFragment", this);

      // show "approve" button if no review OR not current score
      if (user.canApprovePatchset(repository) && (myReview == null || Score.approved != myReview.score)) {
        reviewControls.add(createReviewLink("approveLink", Score.approved));
      } else {
        reviewControls.add(new Label("approveLink").setVisible(false));
      }

      // show "looks good" button if no review OR not current score
      if (myReview == null || Score.looks_good != myReview.score) {
        reviewControls.add(createReviewLink("looksGoodLink", Score.looks_good));
      } else {
        reviewControls.add(new Label("looksGoodLink").setVisible(false));
      }

      // show "needs improvement" button if no review OR not current score
      if (myReview == null || Score.needs_improvement != myReview.score) {
        reviewControls.add(createReviewLink("needsImprovementLink", Score.needs_improvement));
      } else {
        reviewControls.add(new Label("needsImprovementLink").setVisible(false));
      }

      // show "veto" button if no review OR not current score
      if (user.canVetoPatchset(repository) && (myReview == null || Score.vetoed != myReview.score)) {
        reviewControls.add(createReviewLink("vetoLink", Score.vetoed));
      } else {
        reviewControls.add(new Label("vetoLink").setVisible(false));
      }
      panel.add(reviewControls);
    } else {
      // user can not review
      panel.add(new Label("reviewControls").setVisible(false));
    }

    String insertions = MessageFormat.format("<span style=\"color:darkGreen;font-weight:bold;\">+{0}</span>", ticket.insertions);
    String deletions = MessageFormat.format("<span style=\"color:darkRed;font-weight:bold;\">-{0}</span>", ticket.deletions);
    panel.add(new Label("patchsetStat", MessageFormat.format(StringUtils.escapeForHtml(getString("gb.diffStat"), false),
        insertions, deletions)).setEscapeModelStrings(false));

    // changed paths list
    List<PathChangeModel> paths = JGitUtils.getFilesInRange(getRepository(), currentPatchset.base, currentPatchset.tip);
    ListDataProvider<PathChangeModel> pathsDp = new ListDataProvider<PathChangeModel>(paths);
    DataView<PathChangeModel> pathsView = new DataView<PathChangeModel>("changedPath", pathsDp) {
      private static final long serialVersionUID = 1L;
      int counter;

      @Override
      public void populateItem(final Item<PathChangeModel> item) {
        final PathChangeModel entry = item.getModelObject();
        Label changeType = new Label("changeType", "");
        WicketUtils.setChangeTypeCssClass(changeType, entry.changeType);
        setChangeTypeTooltip(changeType, entry.changeType);
        item.add(changeType);

        boolean hasSubmodule = false;
        String submodulePath = null;
        if (entry.isTree()) {
          // tree
          item.add(new LinkPanel("pathName", null, entry.path, TreePage.class,
              WicketUtils
                  .newPathParameter(repositoryName, currentPatchset.tip, entry.path), true));
          item.add(new Label("diffStat").setVisible(false));
        } else if (entry.isSubmodule()) {
          // submodule
          String submoduleId = entry.objectId;
          SubmoduleModel submodule = getSubmodule(entry.path);
          submodulePath = submodule.gitblitPath;
          hasSubmodule = submodule.hasSubmodule;

          item.add(new LinkPanel("pathName", "list", entry.path + " @ " +
              getShortObjectId(submoduleId), TreePage.class,
              WicketUtils.newPathParameter(submodulePath, submoduleId, ""), true).setEnabled(hasSubmodule));
          item.add(new Label("diffStat").setVisible(false));
        } else {
          // blob
          String displayPath = entry.path;
          String path = entry.path;
          if (entry.isSymlink()) {
            RevCommit commit = JGitUtils.getCommit(getRepository(), PatchsetCommand.getTicketBranch(ticket.number));
            path = JGitUtils.getStringContent(getRepository(), commit.getTree(), path);
            displayPath = entry.path + " -> " + path;
          }

          if (entry.changeType.equals(ChangeType.ADD)) {
            // add show view
            item.add(new LinkPanel("pathName", "list", displayPath, BlobPage.class,
                WicketUtils.newPathParameter(repositoryName, currentPatchset.tip, path), true));
          } else if (entry.changeType.equals(ChangeType.DELETE)) {
            // delete, show label
            item.add(new Label("pathName", displayPath));
          } else {
            // mod, show diff
            item.add(new LinkPanel("pathName", "list", displayPath, BlobDiffPage.class,
                WicketUtils.newPathParameter(repositoryName, currentPatchset.tip, path), true));
          }
          item.add(new DiffStatPanel("diffStat", entry.insertions, entry.deletions, true));
        }

        // quick links
        if (entry.isSubmodule()) {
          // submodule
          item.add(setNewTarget(new BookmarkablePageLink<Void>("diff", BlobDiffPage.class, WicketUtils
              .newPathParameter(repositoryName, entry.commitId, entry.path)))
              .setEnabled(!entry.changeType.equals(ChangeType.ADD)));
          item.add(new BookmarkablePageLink<Void>("view", CommitPage.class, WicketUtils
              .newObjectParameter(submodulePath, entry.objectId)).setEnabled(hasSubmodule));
        } else {
          // tree or blob
          item.add(setNewTarget(new BookmarkablePageLink<Void>("diff", BlobDiffPage.class, WicketUtils
              .newBlobDiffParameter(repositoryName, currentPatchset.base, currentPatchset.tip, entry.path)))
              .setEnabled(!entry.changeType.equals(ChangeType.ADD)
                  && !entry.changeType.equals(ChangeType.DELETE)));
          item.add(setNewTarget(new BookmarkablePageLink<Void>("view", BlobPage.class, WicketUtils
              .newPathParameter(repositoryName, currentPatchset.tip, entry.path)))
              .setEnabled(!entry.changeType.equals(ChangeType.DELETE)));
        }

        WicketUtils.setAlternatingBackground(item, counter);
        counter++;
      }
    };
    panel.add(pathsView);

    addPtCheckoutInstructions(user, repository, panel);
    addGitCheckoutInstructions(user, repository, panel);

    return panel;
  }

  protected IconAjaxLink<String> createReviewLink(String wicketId, final Score score) {
    return new IconAjaxLink<String>(wicketId, getScoreClass(score), Model.of(getScoreDescription(score))) {

      private static final long serialVersionUID = 1L;

      @Override
      public void onClick(AjaxRequestTarget target) {
        review(score);
      }
    };
  }

  protected String getScoreClass(Score score) {
    switch (score) {
    case vetoed:
      return "fa fa-exclamation-circle";
    case needs_improvement:
      return "fa fa-thumbs-o-down";
    case looks_good:
      return "fa fa-thumbs-o-up";
    case approved:
      return "fa fa-check-circle";
    case not_reviewed:
    default:
      return "fa fa-minus-circle";
    }
  }

  protected String getScoreDescription(Score score) {
    String description;
    switch (score) {
    case vetoed:
      description = getString("gb.veto");
      break;
    case needs_improvement:
      description = getString("gb.needsImprovement");
      break;
    case looks_good:
      description = getString("gb.looksGood");
      break;
    case approved:
      description = getString("gb.approve");
      break;
    case not_reviewed:
    default:
      description = getString("gb.hasNotReviewed");
    }
    return String.format("%1$s (%2$+d)", description, score.getValue());
  }

  protected void review(Score score) {
    UserModel user = GitBlitWebSession.get().getUser();
    Patchset ps = ticket.getCurrentPatchset();
    Change change = new Change(user.username);
    change.review(ps, score, !ticket.isReviewer(user.username));
    if (!ticket.isWatching(user.username)) {
      change.watch(user.username);
    }
    TicketModel updatedTicket = app().tickets().updateTicket(getRepositoryModel(), ticket.number, change);
    app().tickets().createNotifier().sendMailing(updatedTicket);
    setResponsePage(TicketsPage.class, getPageParameters());
  }

  protected <X extends MarkupContainer> X setNewTarget(X x) {
    x.add(new SimpleAttributeModifier("target", "_blank"));
    return x;
  }

  protected void addGitCheckoutInstructions(UserModel user, RepositoryModel repository, MarkupContainer panel) {
    panel.add(new Label("gitStep1", MessageFormat.format(getString("gb.stepN"), 1)));
    panel.add(new Label("gitStep2", MessageFormat.format(getString("gb.stepN"), 2)));

    String ticketBranch  = Repository.shortenRefName(PatchsetCommand.getTicketBranch(ticket.number));

    String step1 = "git fetch origin";
    String step2 = MessageFormat.format("git checkout {0} && git pull --ff-only\nOR\ngit checkout {0} && git reset --hard origin/{0}", ticketBranch);

    panel.add(new Label("gitPreStep1", step1));
    panel.add(new Label("gitPreStep2", step2));

    panel.add(createCopyFragment("gitCopyStep1", step1.replace("\n", " && ")));
    panel.add(createCopyFragment("gitCopyStep2", step2.replace("\n", " && ")));
  }

  protected void addPtCheckoutInstructions(UserModel user, RepositoryModel repository, MarkupContainer panel) {
    String step1 = MessageFormat.format("pt checkout {0,number,0}", ticket.number);
    panel.add(new Label("ptPreStep", step1));
    panel.add(createCopyFragment("ptCopyStep", step1));
  }

  /**
   * Adds a merge panel for the patchset to the markup container.  The panel
   * may just a message if the patchset can not be merged.
   *
   * @param c
   * @param user
   * @param repository
   */
  protected Component createMergePanel(UserModel user, RepositoryModel repository) {
    Patchset patchset = ticket.getCurrentPatchset();
    if (patchset == null) {
      // no patchset to merge
      return new Label("mergePanel");
    }

    boolean allowMerge;
    if (repository.requireApproval) {
      // rpeository requires approval
      allowMerge = ticket.isOpen() && ticket.isApproved(patchset);
    } else {
      // vetos are binding
      allowMerge = ticket.isOpen() && !ticket.isVetoed(patchset);
    }

    MergeStatus mergeStatus = JGitUtils.canMerge(getRepository(), patchset.tip, ticket.mergeTo);
    if (allowMerge) {
      if (MergeStatus.MERGEABLE == mergeStatus) {
        // patchset can be cleanly merged to integration branch OR has already been merged
        Fragment mergePanel = new Fragment("mergePanel", "mergeableFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetMergeable"), ticket.mergeTo)));
        if (user.canPush(repository)) {
          // user can merge locally
          SimpleAjaxLink<String> mergeButton = new SimpleAjaxLink<String>("mergeButton", Model.of(getString("gb.merge"))) {

            private static final long serialVersionUID = 1L;

            @Override
            public void onClick(AjaxRequestTarget target) {

              // ensure the patchset is still current AND not vetoed
              Patchset patchset = ticket.getCurrentPatchset();
              final TicketModel refreshedTicket = app().tickets().getTicket(getRepositoryModel(), ticket.number);
              if (patchset.equals(refreshedTicket.getCurrentPatchset())) {
                // patchset is current, check for recent veto
                if (!refreshedTicket.isVetoed(patchset)) {
                  // patchset is not vetoed

                  // execute the merge using the ticket service
                  app().tickets().exec(new Runnable() {
                    @Override
                    public void run() {
                      PatchsetReceivePack rp = new PatchsetReceivePack(
                          app().gitblit(),
                          getRepository(),
                          getRepositoryModel(),
                          GitBlitWebSession.get().getUser());
                      MergeStatus result = rp.merge(refreshedTicket);
                      if (MergeStatus.MERGED == result) {
                        // notify participants and watchers
                        rp.sendAll();
                      } else {
                        // merge failure
                        String msg = MessageFormat.format("Failed to merge ticket {0,number,0}: {1}", ticket.number, result.name());
                        logger.error(msg);
                        GitBlitWebSession.get().cacheErrorMessage(msg);
                      }
                    }
                  });
                } else {
                  // vetoed patchset
                  String msg = MessageFormat.format("Can not merge ticket {0,number,0}, patchset {1,number,0} has been vetoed!",
                      ticket.number, patchset.number);
                  GitBlitWebSession.get().cacheErrorMessage(msg);
                  logger.error(msg);
                }
              } else {
                // not current patchset
                String msg = MessageFormat.format("Can not merge ticket {0,number,0}, the patchset has been updated!", ticket.number);
                GitBlitWebSession.get().cacheErrorMessage(msg);
                logger.error(msg);
              }

              setResponsePage(TicketsPage.class, getPageParameters());
            }
          };
          mergePanel.add(mergeButton);
          Component instructions = getMergeInstructions(user, repository, "mergeMore", "gb.patchsetMergeableMore");
          mergePanel.add(instructions);
        } else {
          mergePanel.add(new Label("mergeButton").setVisible(false));
          mergePanel.add(new Label("mergeMore").setVisible(false));
        }
        return mergePanel;
      } else if (MergeStatus.ALREADY_MERGED == mergeStatus) {
        // patchset already merged
        Fragment mergePanel = new Fragment("mergePanel", "alreadyMergedFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetAlreadyMerged"), ticket.mergeTo)));
        return mergePanel;
      } else {
        // patchset can not be cleanly merged
        Fragment mergePanel = new Fragment("mergePanel", "notMergeableFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetNotMergeable"), ticket.mergeTo)));
        if (user.canPush(repository)) {
          // user can merge locally
          Component instructions = getMergeInstructions(user, repository, "mergeMore", "gb.patchsetNotMergeableMore");
          mergePanel.add(instructions);
        } else {
          mergePanel.add(new Label("mergeMore").setVisible(false));
        }
        return mergePanel;
      }
    } else {
      // merge not allowed
      if (MergeStatus.ALREADY_MERGED == mergeStatus) {
        // patchset already merged
        Fragment mergePanel = new Fragment("mergePanel", "alreadyMergedFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetAlreadyMerged"), ticket.mergeTo)));
        return mergePanel;
      } else if (ticket.isVetoed(patchset)) {
        // patchset has been vetoed
        Fragment mergePanel =  new Fragment("mergePanel", "vetoedFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetNotMergeable"), ticket.mergeTo)));
        return mergePanel;
      } else if (repository.requireApproval) {
        // patchset has been not been approved for merge
        Fragment mergePanel = new Fragment("mergePanel", "notApprovedFragment", this);
        mergePanel.add(new Label("mergeTitle", MessageFormat.format(getString("gb.patchsetNotApproved"), ticket.mergeTo)));
        mergePanel.add(new Label("mergeMore", MessageFormat.format(getString("gb.patchsetNotApprovedMore"), ticket.mergeTo)));
        return mergePanel;
      } else {
        // other case
        return new Label("mergePanel");
      }
    }
  }

  protected Component getMergeInstructions(UserModel user, RepositoryModel repository, String markupId, String infoKey) {
    Fragment cmd = new Fragment(markupId, "commandlineMergeFragment", this);
    cmd.add(new Label("instructions", MessageFormat.format(getString(infoKey), ticket.mergeTo)));

    // git instructions
    cmd.add(new Label("mergeStep1", MessageFormat.format(getString("gb.stepN"), 1)));
    cmd.add(new Label("mergeStep2", MessageFormat.format(getString("gb.stepN"), 2)));
    cmd.add(new Label("mergeStep3", MessageFormat.format(getString("gb.stepN"), 3)));

    String ticketBranch = Repository.shortenRefName(PatchsetCommand.getTicketBranch(ticket.number));
    String reviewBranch = PatchsetCommand.getReviewBranch(ticket.number);

    String step1 = MessageFormat.format("git checkout -b {0} {1}", reviewBranch, ticket.mergeTo);
    String step2 = MessageFormat.format("git pull origin {0}", ticketBranch);
    String step3 = MessageFormat.format("git checkout {0}\ngit merge {1}\ngit push origin {0}\ngit branch -d {1}", ticket.mergeTo, reviewBranch);

    cmd.add(new Label("mergePreStep1", step1));
    cmd.add(new Label("mergePreStep2", step2));
    cmd.add(new Label("mergePreStep3", step3));

    cmd.add(createCopyFragment("mergeCopyStep1", step1.replace("\n", " && ")));
    cmd.add(createCopyFragment("mergeCopyStep2", step2.replace("\n", " && ")));
    cmd.add(createCopyFragment("mergeCopyStep3", step3.replace("\n", " && ")));

    // pt instructions
    String ptStep = MessageFormat.format("pt pull {0,number,0}", ticket.number);
    cmd.add(new Label("ptMergeStep", ptStep));
    cmd.add(createCopyFragment("ptMergeCopyStep", step1.replace("\n", " && ")));
    return cmd;
  }

  /**
   * Returns the primary repository url
   *
   * @param user
   * @param repository
   * @return the primary repository url
   */
  protected RepositoryUrl getRepositoryUrl(UserModel user, RepositoryModel repository) {
    HttpServletRequest req = ((WebRequest) getRequest()).getHttpServletRequest();
    List<RepositoryUrl> urls = app().gitblit().getRepositoryUrls(req, user, repository);
    if (ArrayUtils.isEmpty(urls)) {
      return null;
    }
    RepositoryUrl primary = urls.get(0);
    return primary;
  }

  /**
   * Returns the ticket (if any) that this commit references.
   *
   * @param commit
   * @return null or a ticket
   */
  protected TicketModel getTicket(RevCommit commit) {
    try {
      Map<String, Ref> refs = getRepository().getRefDatabase().getRefs(Constants.R_TICKETS_PATCHSETS);
      for (Map.Entry<String, Ref> entry : refs.entrySet()) {
        if (entry.getValue().getObjectId().equals(commit.getId())) {
          long id = PatchsetCommand.getTicketNumber(entry.getKey());
          TicketModel ticket = app().tickets().getTicket(getRepositoryModel(), id);
          return ticket;
        }
      }
    } catch (Exception e) {
      logger().error("failed to determine ticket from ref", e);
    }
    return null;
  }

  protected String getPatchsetTypeCss(PatchsetType type) {
    String typeCss;
    switch (type) {
      case Rebase:
      case Rebase_Squash:
        typeCss = getLozengeClass(Status.Declined, false);
        break;
      case Squash:
      case Amend:
        typeCss = getLozengeClass(Status.On_Hold, false);
        break;
      case Proposal:
        typeCss = getLozengeClass(Status.New, false);
        break;
      case FastForward:
      default:
        typeCss = null;
      break;
    }
    return typeCss;
  }

  @Override
  protected String getPageName() {
    return getString("gb.ticket");
  }

  @Override
  protected Class<? extends BasePage> getRepoNavPageClass() {
    return TicketsPage.class;
  }

  @Override
  protected String getPageTitle(String repositoryName) {
    return "#" + ticket.number + " - " + ticket.title;
  }

  protected Fragment createCopyFragment(String wicketId, String text) {
    if (app().settings().getBoolean(Keys.web.allowFlashCopyToClipboard, true)) {
      // clippy: flash-based copy & paste
      Fragment copyFragment = new Fragment(wicketId, "clippyPanel", this);
      String baseUrl = WicketUtils.getGitblitURL(getRequest());
      ShockWaveComponent clippy = new ShockWaveComponent("clippy", baseUrl + "/clippy.swf");
      clippy.setValue("flashVars", "text=" + StringUtils.encodeURL(text));
      copyFragment.add(clippy);
      return copyFragment;
    } else {
      // javascript: manual copy & paste with modal browser prompt dialog
      Fragment copyFragment = new Fragment(wicketId, "jsPanel", this);
      ContextImage img = WicketUtils.newImage("copyIcon", "clippy.png");
      img.add(new JavascriptTextPrompt("onclick", "Copy to Clipboard (Ctrl+C, Enter)", text));
      copyFragment.add(img);
      return copyFragment;
    }
  }
}
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