source: trunk/lib/Configuration.h @ 978

#ifndef _theplu_svndigest_configuration_
#define _theplu_svndigest_configuration_

// $Id: Configuration.h 978 2009-12-12 20:09:41Z peter $

/*
  Copyright (C) 2007, 2008, 2009 Jari Häkkinen, 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 "Alias.h"

#include <iostream>
#include <map>
#include <stdexcept>
#include <string>
#include <utility>
#include <vector>

namespace theplu{
namespace svndigest{

  ///
  /// Configuration class takes care of all setting defined in the
  /// configuration file.
  ///
  class Configuration
  {
  public:
    static Configuration& instance(void);

    /**
       \return Hexadecimal color code (e.g. 5aee4a) that is used in
       blame output and as line colors in plots. If no color is
       configured for \a author, an empty string is returned.
     */
    std::string author_str_color(const std::string& author) const;

    /**
       The map to lookup the author-color mapping set in the
       configuration file. The color code is a six digit hexadecimal
       number rrggbb.

       \return The author-color map
    */
    const std::map<std::string, std::string>& author_colors(void) const;

    /**
       \return vector of parse codons for the given \a file_name
     */
    const std::vector<std::pair<std::string, std::string> >* 
    codon(std::string file_name) const;

    ///
    /// @brief Aliases for Copyright
    ///
    const std::map<std::string, Alias>& copyright_alias(void) const;

    /// 
    /// throw if stream is not a valid config
    ///
    /// @brief load configuration from stream
    /// 
    void load(std::istream&);

    ///
    /// @return true if we should warn about missing copyright statement
    ///
    bool  missing_copyright_warning(void) const;

    ///
    /// @return root for the trac envrionment, e.g.,
    /// http://dev.thep.lu.se/svndigest/
    ///
    std::string trac_root(void) const;

  private:
    /// 
    /// Creates a Config object with default settings.
    ///
    /// @brief Default Constructor 
    /// 
    Configuration(void);
    // Copy Constructor not implemented
    Configuration(const Configuration&);
    // assignment not implemented because assignment is always self-assignment
    Configuration& operator=(const Configuration&);
    // destructor not implemented
    ~Configuration(void);

    friend std::ostream& operator<<(std::ostream&, const Configuration&);

    void add_codon(std::string, std::string, std::string);

    void clear(void);
    const std::pair<std::string,std::string>* dictionary(std::string lhs) const;
    bool equal_false(const std::string&) const;
    bool equal_true(const std::string&) const;
    /// 
    /// @brief load deafult configuration
    /// 
    void load(void);

    void set_default(void);
    /**
       Translate string \a str using dictionary \a dict

       \note \a str must be equal to d.first (see function equal), 
       or behavior is unspecified.

       \throw if a '$' character is not followed by a positive integer
       that is not larger than number of wildcards in dictionary \a d.
     */
    std::string translate(const std::string& str,
                          const std::pair<std::string, std::string>& d) const;
    
    void validate_dictionary(void) const;

    static Configuration* instance_;

    std::map<std::string, std::string> author_color_;
    std::map<std::string, Alias> copyright_alias_;

    bool missing_copyright_warning_;
    
    typedef std::vector<std::pair<std::string, std::string> > VectorPair;
    typedef std::vector<std::pair<std::string, VectorPair> > String2Codons; 
    String2Codons string2codons_;

    VectorPair dictionary_;

    std::string trac_root_;
  };

  ///
  /// @brief Output operator
  ///
  std::ostream& operator<<(std::ostream&, const Configuration&);

  /**
     If first character is '\n' replace it with "<NEWLINE>"
   */
  std::string trans_end_code(std::string);

  /**
     If last character is '\n' replace it with "<NEWLINE>"
   */
  std::string trans_beg_code(std::string);

  /**
     Trim \a c from beginning and end of string \a str;
     
     \return resulting string

     \throw if first or last character of \a str is NOT character \a c
  */
  std::string trim(std::string str, char c);

  /**
     \brief Class for errors when reading config file.
   */
  class Config_error : public std::runtime_error
  {
  public:
    Config_error(const std::string& line, const std::string& message);
  };

}} // end of namespace svndigest and namespace theplu

#endif