source: trunk/lib/Configuration.cc @ 304

// $Id: Configuration.cc 304 2007-05-11 20:42:04Z peter $

/*
  Copyright (C) 2007 Peter Johansson

  This file is part of svndigest, http://lev.thep.lu.se/trac/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 2 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 this program; if not, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#include "Configuration.h"

#include "utility.h"

#include <cassert>
#include <fstream>
#include <map>
#include <string>
#include <sstream>
#include <stdexcept>
#include <utility>

namespace theplu{
namespace svndigest{

  Configuration* Configuration::instance_=NULL;


  Configuration::Configuration(void)
  {
  }


  const std::map<std::string,Alias>& Configuration::copyright_alias(void) const
  {
    return copyright_alias_;
  }


  void Configuration::load(void)
  {
    set_default();
  }


  void Configuration::load(std::istream& is)
  {
    assert(is.good());
    set_default();

    std::string line;
    std::string section;
    std::string tmp;
    while (getline(is, line)) {
      line = ltrim(line);
      if (line.empty() || line[0]=='#')
        continue;
      std::stringstream ss(line);
      if (line[0] == '[') {
        getline(ss, tmp, '[');
        getline(ss, section, ']');
      }
      else if (section == "copyright-alias"){
        getline(ss, tmp, '=');
        std::string key = trim(tmp);
        getline(ss, tmp);
        std::string name = trim(tmp);
        std::map<std::string,Alias>::iterator iter = 
          copyright_alias_.lower_bound(key);
        if (iter!=copyright_alias_.end() && iter->first==key){
          std::stringstream mess;
          mess << "svndigest: invalid config file: "
               << "in copright-alias section " << key + " defined twice.";
          throw std::runtime_error(mess.str());
        }
        
        // insert alias
        copyright_alias_.insert(iter,std::make_pair(key, Alias(name,copyright_alias_.size())));
      }
      else if (section == "trac"){
        getline(ss, tmp, '=');
        std::string key = trim(tmp);
        getline(ss, tmp);
        std::string value = trim(tmp);
        if (key=="trac-root")
          trac_root_=value;
        else {
          std::stringstream mess;
          mess << "svndigest: invalid config file: "
               << "in trac section" << key + " is invalid option.";
          throw std::runtime_error(mess.str());
        }
      }
    }
  }


  Configuration& Configuration::instance(void)
  {
    if (!instance_)
      instance_ = new Configuration;
    return *instance_;
  }


  void Configuration::set_default(void)
  {
    copyright_alias_.clear();
    trac_root_ = "";
  }


  std::string Configuration::trac_root(void) const
  {
    return trac_root_;
  }


  std::ostream& operator<<(std::ostream& os, const Configuration& conf)
  {
    os << "### This file configures various behaviors for svndigest\n"
       << "### The commented-out below are intended to demonstrate how to use\n" 
       << "### this file.\n"
       << "\n"
       << "### Section for setting aliases used in copyright update\n"
       << "[copyright-alias]\n"
       << "# jdoe = John Doe\n";

    typedef std::vector<std::pair<std::string, Alias> > vector;
    vector vec;
    std::back_insert_iterator<vector> back_insert_iterator(vec);
    vec.reserve(conf.copyright_alias().size());
    std::copy(conf.copyright_alias().begin(), conf.copyright_alias().end(),
              back_insert_iterator);
    // sort with respect to Alias.id
    IdCompare id;
    PairSecondCompare<const std::string, Alias, IdCompare> comp(id);
    std::sort(vec.begin(),vec.end(), comp);
              

    for (vector::const_iterator i(vec.begin()); i!=vec.end(); ++i) {
      os << i->first << " = " << i->second.name() << " \n";
    }

    os << "\n"
       << "### Section for setting trac environment\n"
       << "[trac]\n"
       << "# If trac-root is set, svndigest will create anchors to "
       << "the Trac page.\n"
       << "# trac-root = http://lev.thep.lu.se/trac/svndigest/\n";
    if (!conf.trac_root().empty())
      os << "trac-root = " << conf.trac_root() << "\n";

    return os;
  }


}} // end of namespace svndigest and namespace theplu