# -*- coding: utf-8 -*-

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

# GNU General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program.  If not, see <http://www.gnu.org/licenses/>.

"""

kallithea.controllers.compare

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

compare controller for pylons showing differences between two

repos, branches, bookmarks or tips

This file was forked by the Kallithea project in July 2014.

Original author and date, and relevant copyright and licensing information is below:

:created_on: May 6, 2012

:author: marcink

:copyright: (c) 2013 RhodeCode GmbH, and others.

:license: GPLv3, see LICENSE.md for more details.

"""

import logging

import re

from webob.exc import HTTPBadRequest

from pylons import request, tmpl_context as c, url

from pylons.controllers.util import redirect

from pylons.i18n.translation import _

from kallithea.lib.vcs.utils.hgcompat import unionrepo

from kallithea.lib import helpers as h

from kallithea.lib.base import BaseRepoController, render

from kallithea.lib.auth import LoginRequired, HasRepoPermissionAnyDecorator

from kallithea.lib import diffs

from kallithea.model.db import Repository

from kallithea.lib.diffs import LimitedDiffContainer

from kallithea.controllers.changeset import _ignorews_url,\

    _context_url, get_line_ctx, get_ignore_ws

from kallithea.lib.graphmod import graph_data

from kallithea.lib.compat import json

log = logging.getLogger(__name__)

class CompareController(BaseRepoController):

    def __before__(self):

        super(CompareController, self).__before__()

    @staticmethod

    def _get_changesets(alias, org_repo, org_rev, other_repo, other_rev):

        """

        Returns lists of changesets that can be merged from org_repo@org_rev

        to other_repo@other_rev

        ... and the other way

        ... and the ancestor that would be used for merge

        :param org_repo: repo object, that is most likely the orginal repo we forked from

        :param org_rev: the revision we want our compare to be made

        :param other_repo: repo object, mostl likely the fork of org_repo. It hass

            all changesets that we need to obtain

        :param other_rev: revision we want out compare to be made on other_repo

        """

        ancestor = None

        if org_rev == other_rev:

            org_changesets = []

            other_changesets = []

            ancestor = org_rev

        elif alias == 'hg':

            #case two independent repos

            if org_repo != other_repo:

                hgrepo = unionrepo.unionrepository(other_repo.baseui,

                                                   other_repo.path,

                                                   org_repo.path)

                # all ancestors of other_rev will be in other_repo and

                # rev numbers from hgrepo can be used in other_repo - org_rev ancestors cannot

            #no remote compare do it on the same repository

            else:

                hgrepo = other_repo._repo

            ancestors = hgrepo.revs("ancestor(id(%s), id(%s))", org_rev, other_rev)

            if ancestors:

                # pick arbitrary ancestor - but there is usually only one

                ancestor = hgrepo[ancestors[0]].hex()

            other_revs = hgrepo.revs("ancestors(id(%s)) and not ancestors(id(%s)) and not id(%s)",

                                     other_rev, org_rev, org_rev)

            other_changesets = [other_repo.get_changeset(rev) for rev in other_revs]

            org_revs = hgrepo.revs("ancestors(id(%s)) and not ancestors(id(%s)) and not id(%s)",

                                   org_rev, other_rev, other_rev)

            org_changesets = [org_repo.get_changeset(hgrepo[rev].hex()) for rev in org_revs]

        elif alias == 'git':

            if org_repo != other_repo:

                from dulwich.repo import Repo

                from dulwich.client import SubprocessGitClient

                gitrepo = Repo(org_repo.path)

                SubprocessGitClient(thin_packs=False).fetch(other_repo.path, gitrepo)

                gitrepo_remote = Repo(other_repo.path)

                SubprocessGitClient(thin_packs=False).fetch(org_repo.path, gitrepo_remote)

                revs = []

                for x in gitrepo_remote.get_walker(include=[other_rev],

                                                   exclude=[org_rev]):

                    revs.append(x.commit.id)

                other_changesets = [other_repo.get_changeset(rev) for rev in reversed(revs)]

                if other_changesets:

                    ancestor = other_changesets[0].parents[0].raw_id

                else:

                    # no changesets from other repo, ancestor is the other_rev

                    ancestor = other_rev

            else:

                so, se = org_repo.run_git_command(

                    'log --reverse --pretty="format: %%H" -s %s..%s'

                        % (org_rev, other_rev)

                )

                other_changesets = [org_repo.get_changeset(cs)

                              for cs in re.findall(r'[0-9a-fA-F]{40}', so)]

                so, se = org_repo.run_git_command(

                    'merge-base %s %s' % (org_rev, other_rev)

                )

                ancestor = re.findall(r'[0-9a-fA-F]{40}', so)[0]

            org_changesets = []

        else:

            raise Exception('Bad alias only git and hg is allowed')

        return other_changesets, org_changesets, ancestor

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def index(self, repo_name):

        c.compare_home = True

        org_repo = c.db_repo.repo_name

        other_repo = request.GET.get('other_repo', org_repo)

        c.a_repo = Repository.get_by_repo_name(org_repo)

        c.cs_repo = Repository.get_by_repo_name(other_repo)

        c.a_ref_name = c.cs_ref_name = _('Select changeset')

        return render('compare/compare_diff.html')

    @LoginRequired()

    @HasRepoPermissionAnyDecorator('repository.read', 'repository.write',

                                   'repository.admin')

    def compare(self, repo_name, org_ref_type, org_ref_name, other_ref_type, other_ref_name):

        org_repo = c.db_repo.repo_name

        other_repo = request.GET.get('other_repo', org_repo)

        # If merge is True:

        #   Show what org would get if merged with other:

        #   List changesets that are ancestors of other but not of org.

        #   New changesets in org is thus ignored.

        #   Diff will be from common ancestor, and merges of org to other will thus be ignored.

        # If merge is False:

        #   Make a raw diff from org to other, no matter if related or not.

        #   Changesets in one and not in the other will be ignored

        merge = bool(request.GET.get('merge'))

        # fulldiff disables cut_off_limit

        c.fulldiff = request.GET.get('fulldiff')

        # partial uses compare_cs.html template directly

        partial = request.environ.get('HTTP_X_PARTIAL_XHR')

        # as_form puts hidden input field with changeset revisions

        c.as_form = partial and request.GET.get('as_form')

        # swap url for compare_diff page - never partial and never as_form

        c.swap_url = h.url('compare_url',

            repo_name=other_repo,

            org_ref_type=other_ref_type, org_ref_name=other_ref_name,

            other_repo=org_repo,

            other_ref_type=org_ref_type, other_ref_name=org_ref_name,

            merge=merge or '')

        # set callbacks for generating markup for icons

        c.ignorews_url = _ignorews_url

        c.context_url = _context_url

        ignore_whitespace = request.GET.get('ignorews') == '1'

        line_context = request.GET.get('context', 3)

        org_repo = Repository.get_by_repo_name(org_repo)

        other_repo = Repository.get_by_repo_name(other_repo)

        if org_repo is None:

            msg = 'Could not find org repo %s' % org_repo

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        if other_repo is None:

            msg = 'Could not find other repo %s' % other_repo

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        if org_repo.scm_instance.alias != other_repo.scm_instance.alias:

            msg = 'compare of two different kind of remote repos not available'

            log.error(msg)

            h.flash(msg, category='error')

            return redirect(url('compare_home', repo_name=c.repo_name))

        c.a_rev = self._get_ref_rev(org_repo, org_ref_type, org_ref_name)

        c.cs_rev = self._get_ref_rev(other_repo, other_ref_type, other_ref_name)

        c.compare_home = False

        c.a_repo = org_repo

        c.cs_repo = other_repo

        c.cs_ref_name = other_ref_name

        c.cs_ref_type = other_ref_type

        c.cs_ranges, c.cs_ranges_org, c.ancestor = self._get_changesets(

            org_repo.scm_instance.alias, org_repo.scm_instance, c.a_rev,

            other_repo.scm_instance, c.cs_rev)

        raw_ids = [x.raw_id for x in c.cs_ranges]

        c.cs_comments = other_repo.get_comments(raw_ids)

        c.statuses = other_repo.statuses(raw_ids)

        revs = [ctx.revision for ctx in reversed(c.cs_ranges)]

        c.jsdata = json.dumps(graph_data(c.cs_repo.scm_instance, revs))

        if partial:

            return render('compare/compare_cs.html')

        if merge and c.ancestor:

            # case we want a simple diff without incoming changesets,

            # previewing what will be merged.

            # Make the diff on the other repo (which is known to have other_rev)

            log.debug('Using ancestor %s as rev1 instead of %s'

                      % (c.ancestor, c.a_rev))

            rev1 = c.ancestor

            org_repo = other_repo

        else: # comparing tips, not necessarily linearly related

            if merge:

                log.error('Unable to find ancestor revision')

            if org_repo != other_repo:

                # TODO: we could do this by using hg unionrepo

                log.error('cannot compare across repos %s and %s', org_repo, other_repo)

                h.flash(_('Cannot compare repositories without using common ancestor'), category='error')

                raise HTTPBadRequest

            rev1 = c.a_rev

        diff_limit = self.cut_off_limit if not c.fulldiff else None

        log.debug('running diff between %s and %s in %s'

                  % (rev1, c.cs_rev, org_repo.scm_instance.path))

        txtdiff = org_repo.scm_instance.get_diff(rev1=rev1, rev2=c.cs_rev,

                                      ignore_whitespace=ignore_whitespace,

                                      context=line_context)

        diff_processor = diffs.DiffProcessor(txtdiff or '', format='gitdiff',

                                             diff_limit=diff_limit)

        _parsed = diff_processor.prepare()

        c.limited_diff = False

        if isinstance(_parsed, LimitedDiffContainer):

            c.limited_diff = True

        c.files = []

        c.changes = {}

        c.lines_added = 0

        c.lines_deleted = 0

        for f in _parsed:

            st = f['stats']

            if not st['binary']:

                c.lines_added += st['added']

                c.lines_deleted += st['deleted']

            fid = h.FID('', f['filename'])

            c.files.append([fid, f['operation'], f['filename'], f['stats']])

            htmldiff = diff_processor.as_html(enable_comments=False, parsed_lines=[f])

            c.changes[fid] = [f['operation'], f['filename'], htmldiff]

        return render('compare/compare_diff.html')

## -*- coding: utf-8 -*-

##usage:

## <%namespace name="diff_block" file="/changeset/diff_block.html"/>

## ${diff_block.diff_block(change)}

##

<%def name="diff_block(change)">

<div class="diff-collapse">

    <span target="${'diff-container-%s' % (id(change))}" class="diff-collapse-button">&uarr; ${_('Collapse diff')} &uarr;</span>

</div>

<div class="diff-container" id="${'diff-container-%s' % (id(change))}">

%for FID,(cs1, cs2, change, path, diff, stats) in change.iteritems():

    <div id="${FID}_target" style="clear:both;margin-top:25px"></div>

    <div id="${FID}" class="diffblock  margined comm">

        <div class="code-header">

            <div class="changeset_header">

                <div class="changeset_file">

                    ${h.link_to_if(change!='D',h.safe_unicode(path),h.url('files_home',repo_name=c.repo_name,

                    revision=cs2,f_path=h.safe_unicode(path)))}

                </div>

                <div class="diff-actions">

                  <a href="${h.url('files_diff_home',repo_name=c.repo_name,f_path=h.safe_unicode(path),diff2=cs2,diff1=cs1,diff='diff',fulldiff=1)}" class="tooltip" title="${h.tooltip(_('Show full diff for this file'))}">

                      <img class="icon" src="${h.url('/images/icons/page_white_go.png')}"/>

                  </a>

                  <a href="${h.url('files_diff_2way_home',repo_name=c.repo_name,f_path=h.safe_unicode(path),diff2=cs2,diff1=cs1,diff='diff',fulldiff=1)}" class="tooltip" title="${h.tooltip(_('Show full side-by-side diff for this file'))}">

                      <img class="icon" src="${h.url('/images/icons/application_double.png')}"/>

                  </a>

                  <a href="${h.url('files_diff_home',repo_name=c.repo_name,f_path=h.safe_unicode(path),diff2=cs2,diff1=cs1,diff='raw')}" class="tooltip" title="${h.tooltip(_('Raw diff'))}">

                      <img class="icon" src="${h.url('/images/icons/page_white.png')}"/>

                  </a>

                  <a href="${h.url('files_diff_home',repo_name=c.repo_name,f_path=h.safe_unicode(path),diff2=cs2,diff1=cs1,diff='download')}" class="tooltip" title="${h.tooltip(_('Download diff'))}">

                      <img class="icon" src="${h.url('/images/icons/page_save.png')}"/>

                  </a>

                  ${c.ignorews_url(request.GET, h.FID(cs2,path))}

                  ${c.context_url(request.GET, h.FID(cs2,path))}

                </div>

                <span style="float:right;margin-top:-3px">

                  <label>

                  ${_('Show inline comments')}

                  ${h.checkbox('',checked="checked",class_="show-inline-comments",id_for=h.FID(cs2,path))}

                  </label>

                </span>

            </div>

        </div>

        <div class="code-body">

            <div class="full_f_path" path="${h.safe_unicode(path)}"></div>

            ${diff|n}

            %if path.rsplit('.')[-1] in ['png', 'gif', 'jpg', 'bmp']:

              <div class="btn btn-image-diff-show">Show images</div>

              %if change =='M':

                <div id="${FID}_image-diff" class="btn btn-image-diff-swap" style="display:none">Press to swap images</div>

              %endif

              <div style="font-size: 0">

                %if change == 'M':

                  <img id="${FID}_image-diff-img-a" class="img-diff img-diff-swapable" style="display:none"

                      realsrc="${h.url('files_raw_home',repo_name=c.repo_name,revision=cs1,f_path=path)}" />

                %endif

                %if change in 'AM':

                  <img id="${FID}_image-diff-img-b" class="img-diff img-diff-swapable" style="display:none"

                      realsrc="${h.url('files_raw_home',repo_name=c.repo_name,revision=cs2,f_path=path)}" />

                %endif

              </div>

            %endif

        </div>

    </div>

%endfor

</div>

</%def>

<%def name="diff_block_simple(change)">

  %for op,filenode_path,diff in change:

    <div id="${h.FID('',filenode_path)}_target" style="clear:both;margin-top:25px"></div>

    <div id="${h.FID('',filenode_path)}" class="diffblock  margined comm">

      <div class="code-header">

          <div class="changeset_header">

              <div class="changeset_file">

                  ${h.safe_unicode(filenode_path)} |

                  ## TODO: link to ancestor and head of other instead of exactly other

                  %if op == 'A':

                    ${_('Added')}

                    <a class="spantag" href="${h.url('files_home', repo_name=c.cs_repo.repo_name, f_path=filenode_path, revision=c.cs_rev)}">${h.short_id(c.cs_ref_name) if c.cs_ref_type=='rev' else c.cs_ref_name}</a>

                  %elif op == 'M':

                    <i class="icon-arrow-right"></i>

                  %elif op == 'D':

                    ${_('Deleted')}

                    <a class="spantag" href="${h.url('files_home', repo_name=c.a_repo.repo_name, f_path=filenode_path, revision=c.a_rev)}">${h.short_id(c.a_ref_name) if c.a_ref_type=='rev' else c.a_ref_name}</a>

                  %else:

                    ${op}???

                  %endif

              </div>

              <div class="diff-actions">

                <a href="${h.url('files_diff_2way_home',repo_name=c.cs_repo.repo_name,f_path=h.safe_unicode(filenode_path),diff1=c.a_rev,diff2=c.cs_rev,diff='diff',fulldiff=1)}" class="tooltip" title="${h.tooltip(_('Show full side-by-side diff for this file'))}">

                  <img class="icon" src="${h.url('/images/icons/application_double.png')}"/>

                </a>

                ${c.ignorews_url(request.GET)}

                ${c.context_url(request.GET)}

              </div>

          </div>

      </div>

        <div class="code-body">

            <div class="full_f_path" path="${h.safe_unicode(filenode_path)}"></div>

            ${diff|n}

            %if filenode_path.rsplit('.')[-1] in ['png', 'gif', 'jpg', 'bmp']:

              <div class="btn btn-image-diff-show">Show images</div>

              %if op == 'M':

                <div id="${h.FID('',filenode_path)}_image-diff" class="btn btn-image-diff-swap" style="display:none">Press to swap images</div>

              %endif

              <div style="font-size: 0">

                %if op == 'M':

                  <img id="${h.FID('',filenode_path)}_image-diff-img-a" class="img-diff img-diff-swapable" style="display:none"

                      realsrc="${h.url('files_raw_home',repo_name=c.a_repo.repo_name,revision=c.a_rev,f_path=filenode_path) if op in 'DM' else ''}" />

                %endif

                %if op in 'AM':

                  <img id="${h.FID('',filenode_path)}_image-diff-img-b" class="img-diff img-diff-swapable" style="display:none"

                      realsrc="${h.url('files_raw_home',repo_name=c.cs_repo.repo_name,revision=c.cs_rev,f_path=filenode_path) if op in 'AM' else ''}" />

                %endif

              </div>

            %endif

        </div>

    </div>

  %endfor

</%def>

<%def name="diff_block_js()">

<script type="text/javascript">

$(document).ready(function(){

    $('.btn-image-diff-show').click(function(e){

        $('.btn-image-diff-show').hide();

        $('.btn-image-diff-swap').show();

        $('.img-diff-swapable')

            .each(function(i,e){

                    $(e).attr('src', $(e).attr('realsrc'));

                })

            .show();

        });

    $('.btn-image-diff-swap').mousedown(function(e){

        $('#'+e.currentTarget.id+'-img-a.img-diff-swapable')

          .before($('#'+e.currentTarget.id+'-img-b.img-diff-swapable'));

    });

    var reset = function(e){

        $('#'+e.currentTarget.id+'-img-a.img-diff-swapable')

          .after($('#'+e.currentTarget.id+'-img-b.img-diff-swapable'));

    };

    $('.btn-image-diff-swap').mouseup(reset);

    $('.btn-image-diff-swap').mouseleave(reset);

});

</script>

</%def>

## Changesets table !

<div class="container">

  %if not c.cs_ranges:

    <span class="empty_data">${_('No changesets')}</span>

  %else:

    %if c.ancestor:

    <div class="ancestor">${_('Ancestor')}:

      ${h.link_to(h.short_id(c.ancestor),h.url('changeset_home',repo_name=c.repo_name,revision=c.ancestor))}

    </div>

    %endif

    <div id="graph_nodes">

        <canvas id="graph_canvas"></canvas>

    </div>

    <div id="graph_content_pr" style="margin-left: 100px;">

    <table class="compare_view_commits noborder">

    %for cnt, cs in enumerate(reversed(c.cs_ranges)):

        <tr id="chg_${cnt+1}">

        <td style="width:50px">

          %if cs.raw_id in c.statuses:

            <div title="${_('Changeset status: %s') % c.statuses[cs.raw_id][1]}" class="changeset-status-ico">

                <img height="16" width="16" src="${h.url('/images/icons/flag_status_%s.png' % c.statuses[cs.raw_id][0])}" />

            </div>

          %endif

          %if c.cs_comments.get(cs.raw_id):

              <div class="comments-container">

                  <div class="comments-cnt" title="${_('Changeset has comments')}">

                      <a href="${h.url('changeset_home',repo_name=c.cs_repo.repo_name,revision=cs.raw_id,anchor='comment-%s' % c.cs_comments[cs.raw_id][0].comment_id)}">

                          ${len(c.cs_comments[cs.raw_id])}

                          <i class="icon-comment-alt icon-comment-colored"></i>

                      </a>

                  </div>

              </div>

          %endif

        </td>

        <td style="width: 140px"><span class="tooltip" title="${h.tooltip(h.age(cs.date))}">${cs.date}</span></td>

        <td><div class="gravatar" commit_id="${cs.raw_id}"><img alt="gravatar" src="${h.gravatar_url(h.email_or_none(cs.author),14)}" height="14" width="14"/></div></td>

        <td><div class="author">${h.person(cs.author)}</div></td>

        <td>${h.link_to(h.show_id(cs),h.url('changeset_home',repo_name=c.cs_repo.repo_name,revision=cs.raw_id))}</td>

        <td>

        %if cs.branch:

        <span class="branchtag">${h.link_to(cs.branch,h.url('changelog_home',repo_name=c.cs_repo.repo_name,branch=cs.branch))}</span>

        %endif

        </td>

        <td class="expand_commit" commit_id="${cs.raw_id}" title="${_('Expand commit message')}">

            <i class="icon-resize-vertical" style="color:#DDD"></i>

        </td>

        <td><div id="C-${cs.raw_id}" class="message">${h.urlify_commit(cs.message, c.repo_name)}</div></td>

        </tr>

    %endfor

    </table>

    </div>

    %if c.as_form:

      <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">

      ## links should perhaps use ('rev', c.a_rev) instead ...

      ${h.link_to(_('Show merge diff'),

        h.url('compare_url',

          repo_name=c.a_repo.repo_name,

          org_ref_type=c.a_ref_type, org_ref_name=c.a_ref_name,

          other_repo=c.cs_repo.repo_name,

          other_ref_type=c.cs_ref_type, other_ref_name=c.cs_ref_name,

          merge='1'),

        )}

      </div>

      <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">

        ${_('Common ancestor')}:

        %if c.ancestor:

        ${h.link_to(h.short_id(c.ancestor),h.url('changeset_home',repo_name=c.repo_name,revision=c.ancestor))}

        %else:

        ${_('No common ancestor found - repositories are unrelated')}

        %endif

      </div>

    %endif

    %if c.cs_ranges_org is not None:

      ## TODO: list actual changesets?

      <div style="font-size:1.1em;font-weight: bold;clear:both;padding-top:10px">

        ${h.link_to_ref(c.cs_repo.repo_name, c.cs_ref_type, c.cs_ref_name, c.cs_rev)}

        ${_('is')}

        <a href="${c.swap_url}">${_('%s changesets') % (len(c.cs_ranges_org))}</a>

        ${_('behind')}

      </div>

    %endif

  %endif

</div>

%if c.as_form:

<div id="jsdata" style="display:none">${c.jsdata|n}</div>

%else:

<script type="text/javascript" src="${h.url('/js/graph.js')}"></script>

%endif

<script type="text/javascript">

    $(document).ready(function(){

%if not c.as_form:

        var jsdata = ${c.jsdata|n};

        var r = new BranchRenderer('graph_canvas', 'graph_content_pr');

        r.render(jsdata,100);

%endif

        $('.expand_commit').click(function(e){

            var cid = $(this).attr('commit_id');

            $('#C-'+cid).toggleClass('expanded');

            r.render(jsdata,100);

        });

        $('.gravatar').click(function(e){

            var cid = $(this).attr('commit_id');

            $('#row-'+cid).toggleClass('hl', !$('#row-'+cid).hasClass('hl'));

        });

    });

</script>