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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/resources.h>
#include <sync/logic.h>
#include <filter/roles.h>
#include <filter/string.h>
#include <webserver/request.h>
#include <resource/logic.h>
#include <database/cache.h>
#include <database/config/general.h>
#include <tasks/logic.h>
std::string sync_resources_url ()
{
return "sync/resources";
}
// Serves general resource content to a client.
std::string sync_resources (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();
}
// If the client's IP address very recently made a prioritized server call,
// then delay the current call.
// This is to give priority to the other calls from the same client:
// Not clogging that client's internet connection.
if (sync_logic.prioritized_ip_address_active ()) {
std::this_thread::sleep_for (std::chrono::seconds (5));
}
int action = filter::strings::convert_to_int (webserver_request.query ["a"]);
std::string resource = webserver_request.query ["r"];
int book = filter::strings::convert_to_int (webserver_request.query ["b"]);
int chapter = filter::strings::convert_to_int (webserver_request.query ["c"]);
int verse = filter::strings::convert_to_int (webserver_request.query ["v"]);
bool request_ok = true;
if (book <= 0) request_ok = false;
if (chapter < 0) request_ok = false;
if (chapter > 151) request_ok = false;
if (verse < 0) request_ok = false;
if (verse > 200) request_ok = false;
if (request_ok) {
switch (action) {
case Sync_Logic::resources_request_text:
{
return resource_logic_get_contents_for_client (resource, book, chapter, verse);
}
case Sync_Logic::resources_request_database:
{
// If the cache is ready, return its file size.
if (database::cache::sql::exists (resource, book)) {
if (database::cache::sql::ready (resource, book)) {
return std::to_string (database::cache::sql::size (resource, book));
}
}
// Schedule this resource for caching if that's not yet the case.
std::vector <std::string> signatures = database::config::general::get_resources_to_cache ();
std::string signature = resource + " " + std::to_string (book);
if (!in_array (signature, signatures)) {
signatures.push_back (signature);
database::config::general::set_resources_to_cache (signatures);
}
if (!tasks_logic_queued (task::cache_resources)) {
tasks_logic_queue (task::cache_resources);
}
return "0";
}
case Sync_Logic::resources_request_download:
{
return database::cache::sql::path (resource, book);
}
default: {};
}
}
// Bad request. Delay 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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