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/*
Copyright (©) 2003-2025 Teus Benschop.
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 3 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <tasks/logic.h>
#include <database/logs.h>
#include <filter/string.h>
#include <filter/url.h>
#include <filter/date.h>
// Folder where the tasks are stored.
std::string tasks_logic_folder ()
{
return filter_url_create_root_path ({"processes"});
}
// Queue task $command to run later, with $parameters for that task.
void tasks_logic_queue (std::string command, std::vector <std::string> parameters)
{
// The file on disk will contain the command on the first line,
// and any parameters on the following lines, one parameters per line.
std::vector <std::string> lines;
lines.push_back (command);
lines.insert (lines.end(), parameters.begin(), parameters.end());
// The filename to write to contains seconds and microseconds.
std::string seconds = std::to_string (filter::date::seconds_since_epoch ());
std::string time = seconds + filter::strings::fill (std::to_string (filter::date::numerical_microseconds ()), 8, '0');
std::string file = filter_url_create_path ({tasks_logic_folder (), time});
// On Windows the microtime is not fine enough.
// This leads to one task overwriting a previous one in case it is queued immediately after.
// Deal with that problem here: Ensure the filename is unique.
file = filter_url_unique_path (file);
// Save it.
command = filter::strings::implode (lines, "\n");
filter_url_file_put_contents (file, command);
}
// If $command and $parameters are queued as a task, the function returns true.
// Else it returns false.
// It looks for an exact match.
// Parameters left out are not checked.
bool tasks_logic_queued (std::string command, std::vector <std::string> parameters)
{
// The lines to look for consist of the command followed by the parameters.
std::vector <std::string> search (parameters);
search.insert (search.begin (), command);
// Go through all queued tasks.
std::vector <std::string> files = filter_url_scandir (tasks_logic_folder ());
for (auto & file : files) {
// Read the task's contents.
std::string contents = filter_url_file_get_contents (filter_url_create_path ({tasks_logic_folder (), file}));
std::vector <std::string> lines = filter::strings::explode (contents, '\n');
if (lines.empty ()) return false;
// Look for a match.
bool match = true;
for (size_t i = 0; i < search.size (); i++) {
if (i < lines.size ()) {
if (search [i] != lines[i]) match = false;
} else {
match = false;
}
}
if (match) return true;
}
// No match found.
return false;
}
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