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/*
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.
*/
/** @file src/asset.cc
* @brief Asset class.
*/
#include "raw_convert.h"
#include "asset.h"
#include "util.h"
#include "exceptions.h"
#include "dcp_assert.h"
#include "compose.hpp"
#include <libxml++/libxml++.h>
using std::string;
using boost::function;
using boost::optional;
using namespace dcp;
/** Create an Asset with a randomly-generated ID */
Asset::Asset ()
{
}
/** Create an Asset from a given file.
* @param file File name.
*/
Asset::Asset (boost::filesystem::path file)
: _file (file)
{
}
void
Asset::write_to_pkl (xmlpp::Node* node, Standard standard) const
{
DCP_ASSERT (!_file.empty ());
xmlpp::Node* asset = node->add_child ("Asset");
asset->add_child("Id")->add_child_text ("urn:uuid:" + _id);
asset->add_child("AnnotationText")->add_child_text (_id);
asset->add_child("Hash")->add_child_text (hash ());
asset->add_child("Size")->add_child_text (raw_convert<string> (boost::filesystem::file_size (_file)));
asset->add_child("Type")->add_child_text (pkl_type (standard));
}
void
Asset::write_to_assetmap (xmlpp::Node* node, boost::filesystem::path root) const
{
DCP_ASSERT (!_file.empty ());
xmlpp::Node* asset = node->add_child ("Asset");
asset->add_child("Id")->add_child_text ("urn:uuid:" + _id);
xmlpp::Node* chunk_list = asset->add_child ("ChunkList");
xmlpp::Node* chunk = chunk_list->add_child ("Chunk");
optional<boost::filesystem::path> path = relative_to_root (
boost::filesystem::canonical (root),
boost::filesystem::canonical (_file)
);
if (!path) {
throw MiscError (String::compose ("Asset %1 is not within the directory %2", _file, root));
}
chunk->add_child("Path")->add_child_text (path.get().string ());
chunk->add_child("VolumeIndex")->add_child_text ("1");
chunk->add_child("Offset")->add_child_text ("0");
chunk->add_child("Length")->add_child_text (raw_convert<string> (boost::filesystem::file_size (_file)));
}
string
Asset::hash (function<void (float)> progress) const
{
DCP_ASSERT (!_file.empty ());
if (_hash.empty ()) {
_hash = make_digest (_file, progress);
}
return _hash;
}
bool
Asset::equals (boost::shared_ptr<const Asset> other, EqualityOptions, NoteHandler note) const
{
if (_hash != other->_hash) {
note (DCP_ERROR, "Asset: hashes differ");
return false;
}
return true;
}
/** Set the file that holds this asset on disk. Calling this function
* clears this object's store of its hash, so you should call ::hash
* after this.
*
* @param file New file's path.
*/
void
Asset::set_file (boost::filesystem::path file) const
{
_file = boost::filesystem::absolute (file);
_hash.clear ();
}
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