File * File::get_by_path(const string path)
{
File * file = FileCache::instance().get_by_path(path);
if (file != File::NOT_FOUND) {
return file;
}
if (path == "/") {
return Folder::get_by_id("folder:root");
}
StrArray path_secs = Utils::str_split(path, "/");
if (path_secs.back() == "") { // path ended by '/'
path_secs.pop_back();
}
if (path_secs.size() <= 1) {
throw runtime_error("Invalid path: " + path);
}
string filename = path_secs.back();
filename = Utils::filter_extension(filename);
path_secs.pop_back();
list<File *> files = get_by_title(filename);
list<File *> files_cands = files;
// filter files iterately by parent
int depth = 1;
do {
list<File *> files_cands_new;
string parent_name = path_secs.back();
for (list<File *>::iterator i = files_cands.begin(); i != files_cands.end(); i++) {
File * file_cand = *i;
// TODO memory leak optmize root
Folder * parent = file_cand->get_parent();
for (int i = 1; i < depth; i++) {
parent = parent->get_parent();
}
if (parent->title == parent_name) {
files_cands_new.push_back(file_cand);
}
}
path_secs.pop_back();
files_cands = files_cands_new;
depth++;
} while (files_cands.size() > 1 && path_secs.size() >= 1);
file = NULL;
// target file found
if (files_cands.size() == 1) {
file = files_cands.front();
}
// cache all other files
for (list<File *>::iterator i = files.begin(); i != files.end(); i++) {
File * file_cand = *i;
if (file_cand != file) { // except for the target file
FileCache::instance().save(file_cand);
}
}
FileCache::instance().save(file, path);
return file;
}
