source: branches/0.7-stable/lib/Stats.cc @ 998

// $Id: Stats.cc 998 2010-01-01 22:54:32Z peter $

/*
  Copyright (C) 2005 Peter Johansson
  Copyright (C) 2006, 2007, 2008 Jari Häkkinen, Peter Johansson
  Copyright (C) 2009 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 "Stats.h"

#include "Functor.h"
#include "GnuplotFE.h"
#include "SVNblame.h"
#include "SVNinfo.h"
#include "utility.h"

#include <algorithm>
#include <cassert>
#include <cstdlib>
#include <fstream>
#include <iostream>
#include <iterator>
#include <map>
#include <numeric>
#include <string>
#include <sstream>
#include <unistd.h>
#include <utility>
#include <vector>


namespace theplu{
namespace svndigest{


  Stats::Stats(const std::string& path)
    : stats_(std::vector<Author2Vector>(LineTypeParser::total+1))
  {
    // Make sure latest revision is set properly
    SVNinfo svn_info(path);
    revision_=svn_info.rev();
    last_changed_rev_=svn_info.last_changed_rev();
    reset();
  }


  Stats::~Stats(void)
  {
  }


  void Stats::accumulate(std::vector<unsigned int>& vec,
                         svn_revnum_t rev) const
  {
    assert(rev>0);
    if (vec.empty()){
      // just to allow call to vec.back() below
      vec.resize(1,0);
    }
    else if (vec.begin()+rev-1 < vec.end())
      std::partial_sum(vec.begin()+rev-1,vec.end(),vec.begin()+rev-1);
    // static_cast to remove annoying compiler warning
    if (vec.size() < static_cast<size_t>(revision()+1))
      vec.resize(revision()+1, vec.back());
  }


  void Stats::accumulate_stats(svn_revnum_t rev)
  {
    if (!rev)
      rev = 1;
    for (std::set<std::string>::const_iterator iter(authors().begin());
         iter!=authors().end(); ++iter) {
      std::vector<unsigned int>& code = code_stats()[*iter];
      accumulate(code, rev);
      std::vector<unsigned int>& comments = comment_stats()[*iter];
      accumulate(comments, rev);
      std::vector<unsigned int>& other = other_stats()[*iter];
      accumulate(other, rev);
      std::vector<unsigned int>& copyright = copyright_stats()[*iter];
      accumulate(copyright, rev);
    }
  }


  void Stats::add(const std::string& user, const unsigned int& rev, 
                  const LineTypeParser::line_type& lt, unsigned int n)
  {
    assert(user.size());
    add_author(user);

    add(code_stats()[user], rev, lt==LineTypeParser::code, n);
    add(comment_stats()[user], rev, lt==LineTypeParser::comment, n);
    add(other_stats()[user], rev, lt==LineTypeParser::other, n);
    add(copyright_stats()[user], rev, lt==LineTypeParser::copyright, n);
  }


  void Stats::add(std::vector<unsigned int>& vec, unsigned int rev, bool x,
                  unsigned int n)
  { 
    if (vec.size() < rev+1){
      vec.reserve(rev+1);
      vec.resize(rev);
      assert(vec.size()+1<vec.max_size());
      if (x) {
        vec.push_back(n);
      }
      else {
        vec.push_back(0);
      }
    }
    else if (x)
      vec[rev]+=n;
  }


  void Stats::add_author(std::string name)
  {
    authors_.insert(name);
  }


  void Stats::add_authors(std::set<std::string>::const_iterator first, 
                          std::set<std::string>::const_iterator last)
  {
    authors_.insert(first, last);
  }


  const std::set<std::string>& Stats::authors(void) const
  {
    return authors_;
  }


  void Stats::calc_all(void)
  {
    std::vector<unsigned int> init(revision()+1);
    for (int lt=0; lt <= 4; ++lt) {
      stats_[lt]["all"].clear();
      stats_[lt]["all"] =
        std::accumulate(stats_[lt].begin(), 
                        stats_[lt].end(), init,
                        PairValuePlus<std::string,unsigned int>());
    }
    VectorPlus<unsigned int> vp;
    comment_or_copy_stats()["all"] = 
      vp(comment_stats()["all"], copyright_stats()["all"]);

    total_stats()["all"] = 
      vp(vp(code_stats()["all"], comment_or_copy_stats()["all"]), 
         other_stats()["all"]);
  }


  void Stats::calc_total(void)
  {
    for (std::set<std::string>::const_iterator iter(authors().begin());
         iter!=authors().end(); ++iter) {
      std::vector<unsigned int>& code = code_stats()[*iter];
      std::vector<unsigned int>& comments = comment_stats()[*iter];
      std::vector<unsigned int>& other = other_stats()[*iter];
      std::vector<unsigned int>& copy = copyright_stats()[*iter];

      VectorPlus<unsigned int> vp;
      total_stats()[*iter] = vp(vp(vp(code, comments),other),copy);
    }

  }


  void Stats::calc_comment_or_copy(void)
  {
    for (std::set<std::string>::const_iterator iter(authors().begin());
         iter!=authors().end(); ++iter) {
      std::vector<unsigned int>& comments = comment_stats()[*iter];
      std::vector<unsigned int>& copy = copyright_stats()[*iter];

      VectorPlus<unsigned int> vp;
      comment_or_copy_stats()[*iter] = vp(comments, copy);
    }

  }


  unsigned int Stats::code(const std::string& user) const
  {
    return get_back(code_stats(), user);
  }


  unsigned int Stats::comments(const std::string& user) const
  {
    return get_back(comment_or_copy_stats(), user);
  }


  unsigned int Stats::empty(const std::string& user) const
  {
    return get_back(other_stats(), user);
  }


  unsigned int Stats::get_back(const Author2Vector& m, std::string user) const
  {
    A2VConstIter iter(m.find(std::string(user)));
    if (iter==m.end() || iter->second.empty()) 
      return 0;
    return iter->second.back();
  }


  const std::vector<unsigned int>& Stats::get_vector(const Author2Vector& m, 
                                              std::string user) const
  {
    A2VConstIter iter(m.find(std::string(user)));
    if (iter==m.end()) 
      throw std::runtime_error(user+std::string(" not found i Stats"));
    return iter->second;
  }


  svn_revnum_t Stats::last_changed_rev(void) const
  {
    return last_changed_rev_;
  }


  unsigned int Stats::lines(const std::string& user) const
  {
    return get_back(total_stats(), user);
  }


  void Stats::load(std::istream& is, Author2Vector& m)
  {
    while (m.size() < authors().size()+1 && is.good()) {
      std::string name;
      std::getline(is, name);
      std::vector<unsigned int>& vec=m[name];
      std::string line;
      std::getline(is, line);
      std::stringstream ss(line);
      while (ss.good()) {
        svn_revnum_t rev=0;
        unsigned int count=0;
        ss >> rev;
        ss >> count;
        assert(rev<=revision_);
        if (!count)
          break;
        vec.resize(std::max(vec.size(),static_cast<size_t>(rev+1)));
        vec[rev]=count;
      }
      accumulate(vec);
    }
  }


  svn_revnum_t Stats::load_cache(std::istream& is)
  {
    std::string str;
    getline(is, str);
    if (str!=cache_check_str()) {
      if (str == prev_cache_check_str())
        std::cout << "cache file is obsolete; "
                  << "retrieving statistics from repository.\n";
      return 0;
    }
    svn_revnum_t rev;
    is >> rev;
    reset();
    size_t a_size=0;
    is >> a_size;
    while (authors().size()<a_size && is.good()){
      getline(is, str);
      if (str.size())
        add_author(str);
    }
    getline(is, str);
    if (str!=cache_check_str()) {
      return 0;
    }
    for (size_t i=0; i<stats_.size(); ++i){
      load(is, stats_[i]);
      getline(is, str);
      if (str!=cache_check_str()) {
        return 0;
      }
    }
    return rev;
  }


  void Stats::map_add(A2VConstIter first1, A2VConstIter last1, 
                      Author2Vector& map)
  {
    A2VIter first2(map.begin());
    Author2Vector::key_compare compare;
    while ( first1 != last1) { 
      // key of first1 less than key of first2
      if (first2==map.end() || compare(first1->first,first2->first)) {
        first2 = map.insert(first2, *first1);
        ++first1;
      }
      // key of first2 less than key of first1
      else if ( compare(first2->first, first1->first)) {
        ++first2;
      }
      // keys are equivalent
      else {
        VectorPlus<Author2Vector::mapped_type::value_type> vp;
        first2->second = vp(first1->second, first2->second);
        ++first1;
        ++first2;
      }
    }
  }


  unsigned int Stats::max_element(const std::vector<unsigned int>& vec) const
  {
    return *std::max_element(vec.begin(), vec.end());
  }


  void Stats::parse(const std::string& path, svn_revnum_t rev)
  {
    // reset stats to zero for [rev, inf)
    for (size_t i=0; i<stats_.size(); ++i)
      for (A2VIter iter=stats_[i].begin(); iter!=stats_[i].end(); ++iter) {
        iter->second.resize(rev,0);
        iter->second.resize(revision(),0);
      }
    do_parse(path, rev);
    calc_comment_or_copy();
    calc_total();
    calc_all();
    assert(total_stats().size());
    assert(code_stats().size());
    assert(comment_or_copy_stats().size());
    assert(other_stats().size());
  }

  std::string Stats::plot(const std::string& filename,
                          const std::string& linetype) const
  {
    assert(total_stats().size());
    plot_init(filename);
    GnuplotFE* gp=GnuplotFE::instance();
    const Author2Vector* stat=NULL;
    if (linetype=="total")
      stat = &total_stats();
    else if (linetype=="code")
      stat = &code_stats();
    else if (linetype=="comments")
      stat = &comment_or_copy_stats();
    else if (linetype=="empty")
      stat = &other_stats();
    assert(stat);
    assert(stat->size());
    assert(stat->find("all")!=stat->end());
    std::vector<unsigned int> total=get_vector(*stat, "all");   
    double yrange_max=1.03 * *std::max_element(total.begin(), total.end()) +1.0;
    gp->yrange(yrange_max);

    typedef std::vector<std::pair<std::string, std::vector<unsigned int> > > vec_type;
    vec_type author_cont;
    author_cont.reserve(stat->size());
    for (std::set<std::string>::const_iterator i=authors_.begin(); 
         i != authors_.end(); ++i) {
      assert(stat->find(*i)!=stat->end());
      const std::vector<unsigned int>& vec = get_vector(*stat,*i);
      if (max_element(vec)) {
        author_cont.push_back(std::make_pair(*i,vec));
      }
    }

    LessReversed<std::vector<unsigned int> > lr;
    PairSecondCompare<std::string, std::vector<unsigned int>, 
      LessReversed<std::vector<unsigned int> > > compare(lr);
    std::sort(author_cont.begin(), author_cont.end(), compare);

    size_t plotno=author_cont.size();
    std::stringstream ss;
    vec_type::iterator end(author_cont.end());
    for (vec_type::iterator i(author_cont.begin()); i!=end; ++i) {
      ss.str("");
      ss << "set key height " << 2*plotno;
      gp->command(ss.str());
      ss.str("");
      ss << get_back(*stat, i->first) << " " << i->first;
      gp->yrange(yrange_max);
      gp->linetitle(ss.str());
      ss.str("");
      ss << "steps " << --plotno+2;
      gp->linestyle(ss.str());
      gp->plot(i->second);
    }
    ss.str("");
    ss << get_back(*stat, "all") << " total";
    gp->command("set key height 0");
    gp->linetitle(ss.str());
    gp->linestyle("steps 1");
    gp->plot(total);

    gp->command("unset multiplot");
    gp->yrange();

    return filename;
  }


  void Stats::plot_init(const std::string& filename) const
  {
    GnuplotFE* gp=GnuplotFE::instance();
    gp->command("set term png");
    gp->command("set output '"+filename+"'");
    gp->command("set xtics nomirror");
    gp->command("set ytics nomirror");
    gp->command("set key default");
    gp->command("set key left Left reverse");
    gp->command("set multiplot");
  }


  void Stats::plot_summary(const std::string& filename) const
  {
    plot_init(filename);
    GnuplotFE* gp=GnuplotFE::instance();
    std::vector<unsigned int> total = get_vector(total_stats(), "all");
    double yrange_max=1.03*total.back()+1;
    gp->yrange(yrange_max);
    std::stringstream ss;
    
    ss.str("");
    std::vector<unsigned int> x(get_vector(code_stats(), "all"));
    ss << x.back() << " code";
    gp->command("set key height 2");
    gp->linetitle(ss.str());
    gp->linestyle("steps 2");
    gp->plot(x);

    ss.str("");
    x = get_vector(comment_or_copy_stats(), "all");
    ss << x.back() << " comment";
    gp->command("set key height 4");
    gp->linetitle(ss.str());
    gp->linestyle("steps 3");
    gp->plot(x);

    ss.str("");
    x = get_vector(other_stats(), "all");
    ss << x.back() << " other";
    gp->command("set key height 6");
    gp->linetitle(ss.str());
    gp->linestyle("steps 4");
    gp->plot(x);

    ss.str("");
    ss << total.back() << " total";
    gp->command("set key height 0");
    gp->linetitle(ss.str());
    gp->linestyle("steps 1");
    gp->plot(total);

    gp->command("unset multiplot");
    gp->yrange();
  }


  void Stats::print(std::ostream& os) const
  {
    os << cache_check_str() << "\n";
    os << last_changed_rev() << " ";
    os << authors().size() << "\n";

    std::copy(authors().begin(), authors().end(), 
              std::ostream_iterator<std::string>(os, "\n"));
    os << cache_check_str() << "\n";
    for (size_t i=0; i<stats_.size(); ++i){
      print(os, stats_[i]);
      os << cache_check_str() << "\n";
    }
  }


  void Stats::print(std::ostream& os, const Author2Vector& m) const
  {
    for (A2VConstIter i(m.begin()); i!=m.end(); ++i){
      os << i->first << "\n";
      assert(i->second.size());
      if (i->second[0])
        os << 0 << " " << i->second[0] << " ";
      for (size_t j=1; j<i->second.size(); ++j) {
        // only print if stats changes in this rev
        if (i->second[j] != i->second[j-1]) {
          os << j << " " << i->second[j] - i->second[j-1] << " ";
        }
      }
      os << "\n";
    }
  }

  void Stats::reset(void)
  {
    for (size_t i=0; i<stats_.size(); ++i){
      stats_[i].clear();
      std::vector<unsigned int>& tmp = stats_[i]["all"];
      std::fill(tmp.begin(), tmp.end(), 0);
      tmp.resize(revision_+1);
    }
    authors_.clear();
  }


  Stats& Stats::operator+=(const Stats& rhs)
  {
    revision_ = std::max(revision_, rhs.revision_);
    last_changed_rev_ = std::max(last_changed_rev_, rhs.last_changed_rev_);
    add_authors(rhs.authors().begin(), rhs.authors().end());
    assert(stats_.size()==rhs.stats_.size());
    for (size_t i=0; i<stats_.size(); ++i)
      map_add(rhs.stats_[i].begin(), rhs.stats_[i].end(), stats_[i]);
    
    return *this;
  }

  
  size_t Stats::operator()(int linetype, std::string author, 
                           svn_revnum_t rev) const
  {
    assert(linetype<=LineTypeParser::total);
    assert(static_cast<size_t>(linetype) < stats_.size());
    assert(rev>=0);
    A2VConstIter i = stats_[linetype].find(author);
    if (i==stats_[linetype].end()){
      std::stringstream msg;
      msg << __FILE__ << ": author: " << author << " does not exist";  
      throw std::runtime_error(msg.str());
    }
    assert(rev < static_cast<svn_revnum_t>(i->second.size()));
    return i->second[rev];
  }

}} // end of namespace svndigest and namespace theplu