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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 <database/statistics.h>
#include <filter/url.h>
#include <filter/string.h>
#include <filter/date.h>
#include <database/sqlite.h>
// Database resilience: It contains statistical and non-essential data.
// It is checked and optionally recreated at least once a day.
#ifdef HAVE_CLOUD
void Database_Statistics::create ()
{
SqliteDatabase sql = SqliteDatabase (name ());
sql.add ("CREATE TABLE IF NOT EXISTS changes (timestamp integer, user text, count integer);");
sql.execute ();
}
void Database_Statistics::optimize ()
{
bool healthy_database = database::sqlite::healthy (name ());
if (!healthy_database) {
filter_url_unlink (database::sqlite::get_file (name ()));
create ();
}
}
void Database_Statistics::store_changes (int timestamp, std::string user, int count)
{
SqliteDatabase sql = SqliteDatabase (name ());
sql.add ("INSERT INTO changes VALUES (");
sql.add (timestamp);
sql.add (",");
sql.add (user);
sql.add (",");
sql.add (count);
sql.add (");");
sql.execute ();
}
// Fetches the distinct users who have been active within the last 365 days.
std::vector <std::string> Database_Statistics::get_users ()
{
SqliteDatabase sql = SqliteDatabase (name ());
sql.add ("SELECT DISTINCT user FROM changes WHERE timestamp >=");
sql.add (year_ago ());
sql.add ("ORDER BY user;");
std::vector <std::string> users = sql.query () ["user"];
return users;
}
// Fetches the change statistics from the database for $user for no more than a year ago.
std::vector <std::pair <int, int>> Database_Statistics::get_changes (std::string user)
{
std::vector <std::pair <int, int>> changes;
SqliteDatabase sql = SqliteDatabase (name ());
sql.add ("SELECT timestamp, count FROM changes WHERE timestamp >=");
sql.add (year_ago ());
if (!user.empty ()) {
// Empty user: Get all changes for all users.
sql.add ("AND user =");
sql.add (user);
}
sql.add ("ORDER BY timestamp DESC;");
std::vector <std::string> timestamps = sql.query () ["timestamp"];
std::vector <std::string> counts = sql.query () ["count"];
for (size_t i = 0; i < timestamps.size (); i++) {
int timestamp = filter::strings::convert_to_int (timestamps[i]);
int count = filter::strings::convert_to_int (counts[i]);
changes.push_back (std::pair (timestamp, count));
}
return changes;
}
const char * Database_Statistics::name ()
{
return "statistics";
}
int Database_Statistics::year_ago ()
{
int timestamp = filter::date::seconds_since_epoch ();
timestamp -= (3600 * 24 * 365);
return timestamp;
}
#endif
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