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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/git.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
constexpr const char * database_name {"git"};
namespace database::git {
void create ()
{
SqliteDatabase sql (database_name);
sql.add ("CREATE TABLE IF NOT EXISTS changes ("
" timestamp integer,"
" user text,"
" bible text,"
" book integer,"
" chapter integer,"
" oldusfm text,"
" newusfm text"
");");
sql.execute ();
}
void optimize ()
{
const bool healthy_database = database::sqlite::healthy (database_name);
if (!healthy_database) {
filter_url_unlink (database::sqlite::get_file (database_name));
create ();
}
SqliteDatabase sql (database_name);
// On Android, this pragma prevents the following error: VACUUM; Unable to open database file.
sql.add ("PRAGMA temp_store = MEMORY;");
sql.execute ();
sql.clear ();
// Delete entries older than 10 days.
const int timestamp = filter::date::seconds_since_epoch () - 432000;
sql.add ("DELETE FROM changes WHERE timestamp <");
sql.add (timestamp);
sql.add (";");
sql.execute ();
sql.clear ();
sql.add ("VACUUM;");
sql.execute ();
}
void store_chapter (const std::string& user, const std::string& bible, int book, int chapter,
const std::string& oldusfm, const std::string& newusfm)
{
SqliteDatabase sql (database_name);
sql.add ("INSERT INTO changes VALUES (");
sql.add (filter::date::seconds_since_epoch ());
sql.add (",");
sql.add (user);
sql.add (",");
sql.add (bible);
sql.add (",");
sql.add (book);
sql.add (",");
sql.add (chapter);
sql.add (",");
sql.add (oldusfm);
sql.add (",");
sql.add (newusfm);
sql.add (");");
sql.execute ();
}
// Fetches the distinct users from the database for $bible.
std::vector <std::string> get_users (const std::string& bible)
{
SqliteDatabase sql (database_name);
sql.add ("SELECT DISTINCT user FROM changes WHERE bible =");
sql.add (bible);
sql.add (";");
std::vector <std::string> users = sql.query () ["user"];
return users;
}
// Fetches the rowids from the database for $user and $bible.
std::vector <int> get_rowids (const std::string& user, const std::string& bible)
{
SqliteDatabase sql (database_name);
sql.add ("SELECT rowid FROM changes WHERE user =");
sql.add (user);
sql.add ("AND bible =");
sql.add (bible);
sql.add ("ORDER BY rowid;");
const std::vector <std::string> values = sql.query () ["rowid"];
std::vector <int> rowids;
for (const auto& value : values) {
rowids.push_back (filter::strings::convert_to_int (value));
}
return rowids;
}
bool get_chapter (int rowid,
std::string & user, std::string & bible, int & book, int & chapter,
std::string & oldusfm, std::string & newusfm)
{
SqliteDatabase sql (database_name);
sql.add ("SELECT * FROM changes WHERE rowid =");
sql.add (rowid);
sql.add (";");
std::map <std::string, std::vector <std::string> > result = sql.query ();
const std::vector <std::string> users = result ["user"];
const std::vector <std::string> bibles = result ["bible"];
const std::vector <std::string> books = result ["book"];
const std::vector <std::string> chapters = result ["chapter"];
const std::vector <std::string> oldusfms = result ["oldusfm"];
const std::vector <std::string> newusfms = result ["newusfm"];
if (bibles.empty ())
return false;
if (!users.empty ())
user = users.at(0);
if (!bibles.empty ())
bible = bibles.at(0);
if (!books.empty ())
book = filter::strings::convert_to_int (books.at(0));
if (!chapters.empty ())
chapter = filter::strings::convert_to_int (chapters.at(0));
if (oldusfm.empty ())
oldusfm = oldusfms.at(0);
if (newusfm.empty ())
newusfm = newusfms.at(0);
return true;
}
void erase_rowid (int rowid)
{
SqliteDatabase sql (database_name);
sql.add ("DELETE FROM changes WHERE rowid =");
sql.add (rowid);
sql.add (";");
sql.execute ();
}
void touch_timestamps (int timestamp)
{
SqliteDatabase sql (database_name);
sql.add ("UPDATE changes SET timestamp =");
sql.add (timestamp);
sql.add (";");
sql.execute ();
}
} // Namespace.
#endif
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