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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 <sync/changes.h>
#include <filter/url.h>
#include <filter/roles.h>
#include <filter/string.h>
#include <tasks/logic.h>
#include <database/config/general.h>
#include <database/config/bible.h>
#include <database/logs.h>
#include <database/modifications.h>
#include <client/logic.h>
#include <locale/translate.h>
#include <webserver/request.h>
#include <sync/logic.h>
#include <checksum/logic.h>
#include <config/globals.h>
std::string sync_changes_url ()
{
return "sync/changes";
}
std::string sync_changes (Webserver_Request& webserver_request)
{
Sync_Logic sync_logic (webserver_request);
if (!sync_logic.security_okay ()) {
// When the Cloud enforces https, inform the client to upgrade.
webserver_request.response_code = 426;
return std::string();
}
// Check on the credentials.
if (!sync_logic.credentials_okay ()) return std::string();
// Bail out if the change notifications are not now available to clients.
if (!config_globals_change_notifications_available) {
webserver_request.response_code = 503;
return std::string();
}
// Client makes a prioritized server call: Record the client's IP address.
sync_logic.prioritized_ip_address_record ();
// Get the relevant parameters the client may have POSTed to us, the server.
std::string user = filter::strings::hex2bin (webserver_request.post_get("u"));
int action = filter::strings::convert_to_int (webserver_request.post_get("a"));
int id = filter::strings::convert_to_int (webserver_request.post_get("i"));
switch (action) {
case Sync_Logic::changes_delete_modification:
{
// The server deletes the change notification.
database::modifications::deleteNotification (id);
Database_Logs::log ("Client deletes change notification from server: " + std::to_string (id), roles::translator);
webserver_request.database_config_user ()->set_change_notifications_checksum ("");
return std::string();
}
case Sync_Logic::changes_get_checksum:
{
// The server responds with the possibly cached total checksum for the user's change notifications.
std::string checksum = webserver_request.database_config_user ()->get_change_notifications_checksum ();
if (checksum.empty ()) {
checksum = Sync_Logic::changes_checksum (user);
webserver_request.database_config_user ()->set_change_notifications_checksum (checksum);
}
return checksum;
}
case Sync_Logic::changes_get_identifiers:
{
// The server responds with the identifiers of all the user's change notifications.
std::string any_bible {};
std::vector <int> notification_ids = database::modifications::getNotificationIdentifiers (user, any_bible);
std::string response;
for (auto & notif_id : notification_ids) {
if (!response.empty ()) response.append ("\n");
response.append (std::to_string (notif_id));
}
return response;
}
case Sync_Logic::changes_get_modification:
{
// The server responds with the relevant data of the requested modification.
std::vector <std::string> lines;
// category
lines.push_back (database::modifications::getNotificationCategory (id));
// bible
lines.push_back (database::modifications::getNotificationBible (id));
// book
// chapter
// verse
Passage passage = database::modifications::getNotificationPassage (id);
lines.push_back (std::to_string (passage.m_book));
lines.push_back (std::to_string (passage.m_chapter));
lines.push_back (passage.m_verse);
// oldtext (ensure it's one line for correct transfer to client)
std::string oldtext = database::modifications::getNotificationOldText (id);
oldtext = filter::strings::replace ("\n", " ", oldtext);
lines.push_back (oldtext);
// modification (ensure it's one line for correct transfer to client)
std::string modification = database::modifications::getNotificationModification (id);
modification = filter::strings::replace ("\n", " ", modification);
lines.push_back (modification);
// newtext (ensure it's one line for correct transfer to client)
std::string newtext = database::modifications::getNotificationNewText (id);
newtext = filter::strings::replace ("\n", " ", newtext);
lines.push_back (newtext);
// Result.
return filter::strings::implode (lines, "\n");
}
default: {};
}
// Bad request.
// Delay a while to obstruct a flood of bad requests.
std::this_thread::sleep_for (std::chrono::seconds (1));
webserver_request.response_code = 400;
return std::string();
}
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