collect.h

/*
    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
 
    This program 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.
 
    This program 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 
*/
 
#ifndef LIBSUB_COLLECT_H
#define LIBSUB_COLLECT_H
 
#include "subtitle.h"
#include "raw_subtitle.h"
#include <algorithm>
 
namespace sub {
 
template <class T>
T
collect (std::vector<RawSubtitle> raw)
{
    std::stable_sort (raw.begin(), raw.end());
 
    T out;
 
    boost::optional<Subtitle> current;
    for (auto const& i: raw) {
        if (current && current->same_metadata(i)) {
            /* This RawSubtitle can be added to current... */
            if (!current->lines.empty() && current->lines.back().same_metadata(i)) {
                /* ... and indeed to its last line */
                current->lines.back().blocks.push_back(Block(i));
            } else {
                /* ... as a new line */
                current->lines.push_back(Line(i));
            }
        } else {
            /* We must start a new Subtitle */
            if (current) {
                out.push_back (current.get ());
            }
            current = Subtitle (i);
        }
    }
 
    if (current) {
        out.push_back (current.get ());
    }
 
    return out;
}
 
}
 
#endif