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/*
Copyright (C) 2021 Carl Hetherington <cth@carlh.net>
This file is part of DCP-o-matic.
DCP-o-matic 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.
DCP-o-matic 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 DCP-o-matic. If not, see <http://www.gnu.org/licenses/>.
*/
#include "content.h"
#include "find_missing.h"
#include "util.h"
#include <dcp/filesystem.h>
using std::map;
using std::shared_ptr;
using std::string;
using std::vector;
typedef map<shared_ptr<const Content>, vector<boost::filesystem::path>> Replacements;
static
void
search_by_name(Replacements& replacement_paths, boost::filesystem::path directory, int depth = 0)
{
boost::system::error_code ec;
for (auto candidate: dcp::filesystem::directory_iterator(directory, ec)) {
if (dcp::filesystem::is_regular_file(candidate.path())) {
for (auto& replacement: replacement_paths) {
for (auto& path: replacement.second) {
/* Extract a filename as if this path were from a platform with a different
* separator.
*/
string other = path.string();
#ifdef DCPOMATIC_POSIX
std::replace(other.begin(), other.end(), '\\', '/');
#else
std::replace(other.begin(), other.end(), '/', '\\');
#endif
boost::filesystem::path other_path(other);
if (
!dcp::filesystem::exists(path) &&
(path.filename() == candidate.path().filename() || other_path.filename() == candidate.path().filename())) {
path = candidate.path();
}
}
}
} else if (dcp::filesystem::is_directory(candidate.path()) && depth <= 2) {
search_by_name(replacement_paths, candidate, depth + 1);
}
}
/* Just ignore errors when creating the directory_iterator; they can be triggered by things like
* macOS' love of creating random directories (see #2291).
*/
}
static
void
search_by_digest(Replacements& replacement_paths, boost::filesystem::path directory, int depth = 0)
{
boost::system::error_code ec;
for (auto candidate: dcp::filesystem::directory_iterator(directory, ec)) {
if (dcp::filesystem::is_regular_file(candidate.path())) {
auto const candidate_digest = simple_digest({candidate.path()});
for (auto& replacement: replacement_paths) {
DCPOMATIC_ASSERT(replacement.first->number_of_paths() == 1)
if (replacement.first->digest() == candidate_digest) {
replacement.second = { candidate.path() };
}
}
} else if (dcp::filesystem::is_directory(candidate.path()) && depth <= 2) {
search_by_digest(replacement_paths, candidate, depth + 1);
}
}
}
void
dcpomatic::find_missing (vector<shared_ptr<Content>> content_to_fix, boost::filesystem::path clue)
{
using namespace boost::filesystem;
Replacements name_replacement_paths;
for (auto content: content_to_fix) {
name_replacement_paths[content] = content->paths();
}
/* Look for replacements with the same filename */
search_by_name(name_replacement_paths, is_directory(clue) ? clue : clue.parent_path());
/* Fix any content that can be fixed with those, making a note of those that cannot */
Replacements digest_replacement_paths;
for (auto content: content_to_fix) {
auto const& repl = name_replacement_paths[content];
bool const replacements_exist = std::find_if(repl.begin(), repl.end(), [](path p) { return !exists(p); }) == repl.end();
if (replacements_exist && simple_digest(name_replacement_paths[content]) == content->digest()) {
content->set_paths (repl);
} else {
/* Put it on the list to look for by digest, if possible */
if (content->number_of_paths() == 1) {
digest_replacement_paths[content] = name_replacement_paths[content];
}
}
}
if (!digest_replacement_paths.empty()) {
/* Search for content with just one path by digest */
search_by_digest(digest_replacement_paths, is_directory(clue) ? clue : clue.parent_path());
for (auto content: content_to_fix) {
auto iter = digest_replacement_paths.find(content);
if (iter != digest_replacement_paths.end()) {
auto const& repl = iter->second;
bool const replacements_exist = std::find_if(repl.begin(), repl.end(), [](path p) { return !exists(p); }) == repl.end();
if (replacements_exist) {
content->set_paths(repl);
}
}
}
}
}
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