text: ////////////////////////////////////////////////////////////////////////////////
  //
  // Copyright 2016 - 2020, Thomas Lauf, Paul Beckingham, Federico Hernandez.
  //
  // Permission is hereby granted, free of charge, to any person obtaining a copy
  // of this software and associated documentation files (the "Software"), to deal
  // in the Software without restriction, including without limitation the rights
  // to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  // copies of the Software, and to permit persons to whom the Software is
  // furnished to do so, subject to the following conditions:
  //
  // The above copyright notice and this permission notice shall be included
  // in all copies or substantial portions of the Software.
  //
  // THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
  // OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  // FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
  // THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  // LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  // OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  // SOFTWARE.
  //
  // https://www.opensource.org/licenses/mit-license.php
  //
  ////////////////////////////////////////////////////////////////////////////////
  
  #include <cmake.h>
  #include <Duration.h>
  #include <format.h>
  #include <commands.h>
  #include <timew.h>
  #include <iostream>
  #include <stdlib.h>
  
  ////////////////////////////////////////////////////////////////////////////////
  int CmdSplit (
    const CLI& cli,
    Rules& rules,
    Database& database,
    Journal& journal)
  {
    const bool verbose = rules.getBoolean ("verbose");
  
    std::set <int> ids = cli.getIds ();
  
    if (ids.empty ())
    {
      throw std::string ("IDs must be specified. See 'timew help split'.");
    }
  
    journal.startTransaction ();
  
    std::vector <Interval> intervals = getIntervalsByIds (database, rules, ids);
  
    // Apply tags to ids.
    for (const auto& interval : intervals)
    {
      Interval first = interval;
      Interval second = first;
  
      if (first.is_open ())
      {
        Datetime midpoint;
        midpoint -= (midpoint - first.start) / 2;
        first.end = midpoint;
        second.start = midpoint;
      }
      else
      {
        Datetime midpoint = first.start;
        midpoint += (first.end - first.start) / 2;
        first.end = midpoint;
        second.start = midpoint;
      }
  
      database.deleteInterval (interval);
  
      validate (cli, rules, database, first);
      database.addInterval (first, verbose);
  
      validate (cli, rules, database, second);
      database.addInterval (second, verbose);
  
      if (verbose)
      {
        std::cout << "Split @" << interval.id << '\n';
      }
    }
  
    journal.endTransaction ();
  
    return 0;
  }
  
  ////////////////////////////////////////////////////////////////////////////////
  