source: trunk/lib/SVNlog.cc @ 1115

// $Id: SVNlog.cc 1115 2010-07-03 20:13:59Z peter $

/*
  Copyright (C) 2007, 2008 Jari Häkkinen, Peter Johansson
  Copyright (C) 2009, 2010 Peter Johansson

  This file is part of svndigest, http://dev.thep.lu.se/svndigest

  svndigest 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.

  svndigest 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 svndigest. If not, see <http://www.gnu.org/licenses/>.
*/

#include "SVNlog.h"

#include "Commitment.h"
#include "SVN.h"

#include <algorithm>
#include <cassert>
#include <iostream>
#include <stdexcept>
#include <sstream>
#include <string>

namespace theplu {
namespace svndigest {


  SVNlog::SVNlog(void)
  {
  }


  SVNlog::SVNlog(const std::string& path)
  {
    SVN::instance()->client_log(path, log_message_receiver,
                                static_cast<void*>(&lb_));
  }


  SVNlog::~SVNlog(void)
  {
  }

  
  bool SVNlog::exist(std::string name) const
  {
    
    SVNlog::container::const_reverse_iterator iter = commits().rbegin();
    for ( ; iter!= commits().rend(); ++iter)
      if (iter->author() == name)
        return true;
    return false;
  }


  const Commitment& SVNlog::latest_commit(void) const
  {
    assert(commits().size());
    return *commits().rbegin();
  }


  const Commitment& SVNlog::latest_commit(std::string name) const
  {
    SVNlog::container::const_reverse_iterator iter = commits().rbegin();
    for ( ; iter!= commits().rend(); ++iter)
      if (iter->author() == name)
        return *iter;
    std::stringstream ss;
    ss << __FILE__ << " could not find author: " << name;
    throw std::runtime_error(ss.str());
    // let us return something to avoid compiler warnings
    return *commits().begin();
  }


  svn_error_t* 
  SVNlog::log_message_receiver(void *baton, apr_hash_t *changed_paths,
                               svn_revnum_t rev, const char *author,
                               const char *date, const char *msg,
                               apr_pool_t *pool)
  {
    struct log_receiver_baton *lb=static_cast<struct log_receiver_baton*>(baton);
    std::string d;
    if (date && date[0])
      d = date;
    else if (!lb->commits.empty()) {
      // FIXME: this is a bit hackish to fix the problem reported in
      // ticket #458. If we lack read permission for rev, no date is
      // retrived and we use the date of the previous rev. That should
      // be OK if we call the super-root and previous rev truly is
      // rev-1 (super-root contains all revs). That should be the
      // typical case where this happens. If this would happen when
      // calling the log of a sub-node (e.g. the trunk) this could be
      // problematic because log is more or less sparse and when
      // merging two sparse logs together this workaround could have
      // strange effects such as rev+1 having a earlier date than
      // rev. To ensure that we only allow this workaround when
      // calling super-root, we have the assert below:
      std::cerr << "no date defined for revision: " << rev << "\n";
      assert(rev == lb->commits.rbegin()->revision()+1);
      d = lb->commits.rbegin()->date();
    }
    else {
      std::stringstream msg;
      msg << "No date defined for revision: " << rev;
      throw SVNException(msg.str()); 
    }
    std::string a;
    if (author && author[0])
      a=author;
    std::string message;
    if (msg)
      message = msg;
    lb->commits.insert(lb->commits.end(), Commitment(a, d, message, rev));
    return SVN_NO_ERROR;
  }


  void SVNlog::swap(SVNlog& rhs)
  {
    lb_.commits.swap(rhs.lb_.commits);
  }


  SVNlog& operator+=(SVNlog& lhs, const SVNlog& rhs)
  {
    lhs.commits().insert(rhs.commits().begin(), rhs.commits().end());
    return lhs;
  }

}} // end of namespace svndigest and namespace theplu