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"

namespace sub {

template <class T>
T
collect (std::list<RawSubtitle> raw)
{
    raw.sort ();

    T out;

    boost::optional<Subtitle> current;
    for (std::list<RawSubtitle>::const_iterator i = raw.begin (); i != raw.end(); ++i) {
        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