HistoryLogReader.cc

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#include <iostream>
 
#include <zypp-core/base/InputStream>
#include <zypp/base/IOStream.h>
#include <zypp/base/Logger.h>
#include <zypp-core/parser/ParseException>
 
#include <zypp/parser/HistoryLogReader.h>
 
using std::endl;
 
namespace zypp
{
  namespace parser
  {
 
  //
  //    class HistoryLogReader::Impl
  //
  struct HistoryLogReader::Impl
  {
    Impl( const Pathname & historyFile_r, const Options & options_r, const ProcessData & callback_r )
    :  _filename( historyFile_r )
    , _options( options_r )
    , _callback( callback_r )
    {}
 
    bool parseLine( const std::string & line_r, unsigned int lineNr_r );
 
    void readAll( const ProgressData::ReceiverFnc & progress_r );
    void readFrom( const Date & date_r, const ProgressData::ReceiverFnc & progress_r );
    void readFromTo( const Date & fromDate_r, const Date & toDate_r, const ProgressData::ReceiverFnc & progress_r );
 
    void addActionFilter( const HistoryActionID & action_r )
    {
      if ( action_r == HistoryActionID::NONE )
        _actionfilter.clear();
      else
        _actionfilter.insert( action_r.asString() );
    }
 
    Pathname _filename;
    Options  _options;
    ProcessData _callback;
    std::set<std::string> _actionfilter;
  };
 
  bool HistoryLogReader::Impl::parseLine( const std::string & line_r, unsigned lineNr_r )
  {
    // parse into fields
    HistoryLogData::FieldVector fields;
    str::splitEscaped( line_r, std::back_inserter(fields), "|", true );
 
    if ( fields.size() < 2 ) {
      WAR << "Ignore invalid history log entry on line #" << lineNr_r << " '"<< line_r << "'" << endl;
      return true;      // At least an action field[1] is needed!
    }
    fields[1] = str::trim( std::move(fields[1]) );      // for whatever reason writer is padding the action field
 
    if ( !_actionfilter.empty() && !_actionfilter.count( fields[1] ) )
      return true;
 
    // move into data class
    HistoryLogData::Ptr data;
    try
    {
      data = HistoryLogData::create( fields );
    }
    catch ( const Exception & excpt )
    {
      ZYPP_CAUGHT( excpt );
      if ( _options.testFlag( IGNORE_INVALID_ITEMS ) )
      {
        WAR << "Ignore invalid history log entry on line #" << lineNr_r << " '"<< line_r << "'" << endl;
        return true;
      }
      else
      {
        ERR << "Invalid history log entry on line #" << lineNr_r << " '"<< line_r << "'" << endl;
        ParseException newexcpt( str::Str() << "Error in history log on line #" << lineNr_r );
        newexcpt.remember( excpt );
        ZYPP_THROW( newexcpt );
      }
    }
 
    // consume data
    if ( _callback && !_callback( data ) )
    {
      WAR << "Stop parsing requested by consumer callback on line #" << lineNr_r << endl;
      return false;
    }
    return true;
  }
 
  void HistoryLogReader::Impl::readAll( const ProgressData::ReceiverFnc & progress_r )
  {
    InputStream is( _filename );
    iostr::EachLine line( is );
 
    ProgressData pd;
    pd.sendTo( progress_r );
    pd.toMin();
 
    for ( ; line; line.next(), pd.tick() )
    {
      // ignore comments
      if ( (*line)[0] == '#' )
        continue;
 
      if ( ! parseLine( *line, line.lineNo() ) )
        break;  // requested by consumer callback
    }
 
    pd.toMax();
  }
 
  void HistoryLogReader::Impl::readFrom( const Date & date_r, const ProgressData::ReceiverFnc & progress_r )
  {
    InputStream is( _filename );
    iostr::EachLine line( is );
 
    ProgressData pd;
    pd.sendTo( progress_r );
    pd.toMin();
 
    bool pastDate = false;
    for ( ; line; line.next(), pd.tick() )
    {
      const std::string & s = *line;
 
      // ignore comments
      if ( s[0] == '#' )
        continue;
 
      if ( pastDate )
      {
        if ( ! parseLine( s, line.lineNo() ) )
          break;        // requested by consumer callback
      }
      else
      {
        Date logDate( s.substr( 0, s.find('|') ), HISTORY_LOG_DATE_FORMAT );
        if ( logDate > date_r )
        {
          pastDate = true;
          if ( ! parseLine( s, line.lineNo() ) )
            break;      // requested by consumer callback
        }
      }
    }
 
    pd.toMax();
  }
 
  void HistoryLogReader::Impl::readFromTo( const Date & fromDate_r, const Date & toDate_r, const ProgressData::ReceiverFnc & progress_r )
  {
    InputStream is( _filename );
    iostr::EachLine line( is );
 
    ProgressData pd;
    pd.sendTo( progress_r );
    pd.toMin();
 
    bool pastFromDate = false;
    for ( ; line; line.next(), pd.tick() )
    {
      const std::string & s = *line;
 
      // ignore comments
      if ( s[0] == '#' )
        continue;
 
      Date logDate( s.substr( 0, s.find('|') ), HISTORY_LOG_DATE_FORMAT );
 
      // past toDate - stop reading
      if ( logDate >= toDate_r )
        break;
 
      // past fromDate - start reading
      if ( !pastFromDate && logDate > fromDate_r )
        pastFromDate = true;
 
      if ( pastFromDate )
      {
        if ( ! parseLine( s, line.lineNo() ) )
          break;        // requested by consumer callback
      }
    }
 
    pd.toMax();
  }
 
  //
  //    class HistoryLogReader
  //
 
  HistoryLogReader::HistoryLogReader( const Pathname & historyFile_r, const Options & options_r, const ProcessData & callback_r )
  : _pimpl( new HistoryLogReader::Impl( historyFile_r, options_r, callback_r ) )
  {}
 
  HistoryLogReader::~HistoryLogReader()
  {}
 
  void HistoryLogReader::setIgnoreInvalidItems( bool ignoreInvalid_r )
  { _pimpl->_options.setFlag( IGNORE_INVALID_ITEMS, ignoreInvalid_r ); }
 
  bool HistoryLogReader::ignoreInvalidItems() const
  { return _pimpl->_options.testFlag( IGNORE_INVALID_ITEMS ); }
 
  void HistoryLogReader::readAll( const ProgressData::ReceiverFnc & progress_r )
  { _pimpl->readAll( progress_r ); }
 
  void HistoryLogReader::readFrom( const Date & date_r, const ProgressData::ReceiverFnc & progress_r )
  { _pimpl->readFrom( date_r, progress_r ); }
 
  void HistoryLogReader::readFromTo( const Date & fromDate_r, const Date & toDate_r, const ProgressData::ReceiverFnc & progress_r )
  { _pimpl->readFromTo( fromDate_r, toDate_r, progress_r ); }
 
  void HistoryLogReader::addActionFilter( const HistoryActionID & action_r )
  { _pimpl->addActionFilter( action_r ); }
 
  } // namespace parser
} // namespace zypp