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/*
Copyright (C) 2005-2007 Michel de Boer <michel@twinklephone.com>
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, see <https://www.gnu.org/licenses/>.
*/
#define COMMENT_SYMBOL '#'
template< class R >
void t_record_file<R>::split_record(const string &record, vector<string> &v) const {
v = split_escaped(record, field_separator);
for (vector<string>::iterator it = v.begin(); it != v.end(); ++it) {
*it = unescape(*it);
}
}
template< class R >
string t_record_file<R>::join_fields(const vector<string> &v) const {
string s;
for (vector<string>::const_iterator it = v.begin(); it != v.end(); ++it) {
if (it != v.begin()) s += field_separator;
// Escape comment symbol.
if (!it->empty() && it->at(0) == COMMENT_SYMBOL) s += '\\';
s += escape(*it, field_separator);
}
return s;
}
template< class R >
void t_record_file<R>::add_record(const R &record) {
records.push_back(record);
}
template< class R >
t_record_file<R>::t_record_file(): field_separator('|')
{}
template< class R >
t_record_file<R>::t_record_file(const string &_header, char _field_separator,
const string &_filename) :
header(_header),
field_separator(_field_separator),
filename(_filename)
{}
template< class R >
void t_record_file<R>::set_header(const string &_header) {
header = _header;
}
template< class R >
void t_record_file<R>::set_separator(char _separator) {
field_separator = _separator;
}
template< class R >
void t_record_file<R>::set_filename(const string &_filename) {
filename = _filename;
}
template< class R >
list<R> *t_record_file<R>::get_records() {
return &records;
}
template< class R >
bool t_record_file<R>::load(string &error_msg) {
struct stat stat_buf;
mtx_records.lock();
records.clear();
// Check if file exists
if (filename.empty() || stat(filename.c_str(), &stat_buf) != 0) {
// There is no file.
mtx_records.unlock();
return true;
}
// Open call ile
ifstream file(filename.c_str());
if (!file) {
error_msg = TRANSLATE("Cannot open file for reading: %1");
error_msg = replace_first(error_msg, "%1", filename);
mtx_records.unlock();
return false;
}
// Read and parse history file.
while (!file.eof()) {
string line;
getline(file, line);
// Check if read operation succeeded
if (!file.good() && !file.eof()) {
error_msg = TRANSLATE("File system error while reading file %1 .");
error_msg = replace_first(error_msg, "%1", filename);
mtx_records.unlock();
return false;
}
line = trim(line);
// Skip empty lines
if (line.size() == 0) continue;
// Skip comment lines
if (line[0] == COMMENT_SYMBOL) continue;
// Add record. Skip records that cannot be parsed.
R record;
vector<string> v;
split_record(line, v);
if (record.populate_from_file_record(v)) {
add_record(record);
}
}
mtx_records.unlock();
return true;
}
template< class R >
bool t_record_file<R>::save(string &error_msg) const {
if (filename.empty()) return false;
mtx_records.lock();
// Open file
ofstream file(filename.c_str());
if (!file) {
error_msg = TRANSLATE("Cannot open file for writing: %1");
error_msg = replace_first(error_msg, "%1", filename);
mtx_records.unlock();
return false;
}
// Write file header
file << "# " << header << endl;
// Write records
for (record_const_iterator i = records.begin(); i != records.end(); ++i) {
vector<string> v;
if (i->create_file_record(v)) {
file << join_fields(v);
file << endl;
}
}
mtx_records.unlock();
if (!file.good()) {
error_msg = TRANSLATE("File system error while writing file %1 .");
error_msg = replace_first(error_msg, "%1", filename);
return false;
}
return true;
}
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