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/* ScummVM - Graphic Adventure Engine
*
* ScummVM is the legal property of its developers, whose names
* are too numerous to list here. Please refer to the COPYRIGHT
* file distributed with this source distribution.
*
* 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 2
* 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 "gui/storagewizarddialog.h"
#include "gui/widgets/list.h"
#include "gui/widget.h"
#include "gui/gui-manager.h"
#include "backends/cloud/cloudmanager.h"
#ifdef USE_SDL_NET
#include "backends/networking/sdl_net/localwebserver.h"
#endif
#include "common/translation.h"
#include "widgets/edittext.h"
namespace GUI {
enum {
kConnectCmd = 'Cnnt',
kCodeBoxCmd = 'CdBx'
};
StorageWizardDialog::StorageWizardDialog(uint32 storageId):
Dialog("GlobalOptions_Cloud_ConnectionWizard"), _storageId(storageId), _close(false), _stopServerOnClose(false) {
_backgroundType = GUI::ThemeEngine::kDialogBackgroundPlain;
Common::String headline = Common::String::format(_("%s Storage Connection Wizard"), CloudMan.listStorages()[_storageId].c_str());
new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.Headline", headline);
new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.NavigateLine", _s("Navigate to the following URL:"));
Common::String url = "https://www.scummvm.org/c/";
switch (storageId) {
case Cloud::kStorageDropboxId: url += "db"; break;
case Cloud::kStorageOneDriveId: url += "od"; break;
case Cloud::kStorageGoogleDriveId: url += "gd"; break;
}
#ifdef USE_SDL_NET
url += "s";
#endif
new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.URLLine", url);
StaticTextWidget *returnLine1 = new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.ReturnLine1", _s("Obtain the code from the storage, enter it"));
StaticTextWidget *returnLine2 = new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.ReturnLine2", _s("in the following field and press 'Connect':"));
for (uint32 i = 0; i < CODE_FIELDS; ++i)
_codeWidget[i] = new EditTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.CodeBox" + Common::String::format("%d", i+1), "", 0, kCodeBoxCmd);
_messageWidget = new StaticTextWidget(this, "GlobalOptions_Cloud_ConnectionWizard.MessageLine", "");
// Buttons
new ButtonWidget(this, "GlobalOptions_Cloud_ConnectionWizard.CancelButton", _("Cancel"), 0, kCloseCmd);
_connectWidget = new ButtonWidget(this, "GlobalOptions_Cloud_ConnectionWizard.ConnectButton", _("Connect"), 0, kConnectCmd);
#ifdef USE_SDL_NET
// hide fields and even the button if local webserver is on
returnLine1->setLabel(_s("You would be navigated to ScummVM's page"));
returnLine2->setLabel(_s("when you'd allow it to use your storage."));
for (uint32 i = 0; i < CODE_FIELDS; ++i)
_codeWidget[i]->setVisible(false);
_messageWidget->setVisible(false);
_connectWidget->setVisible(false);
#endif
}
void StorageWizardDialog::open() {
Dialog::open();
#ifdef USE_SDL_NET
_stopServerOnClose = !LocalServer.isRunning();
LocalServer.start();
LocalServer.indexPageHandler().setTarget(this);
#endif
}
void StorageWizardDialog::close() {
#ifdef USE_SDL_NET
if (_stopServerOnClose) LocalServer.stopOnIdle();
LocalServer.indexPageHandler().setTarget(nullptr);
#endif
Dialog::close();
}
void StorageWizardDialog::handleCommand(CommandSender *sender, uint32 cmd, uint32 data) {
switch (cmd) {
case kCodeBoxCmd: {
Common::String code, message;
uint32 correctFields = 0;
for (uint32 i = 0; i < CODE_FIELDS; ++i) {
Common::String subcode = _codeWidget[i]->getEditString();
if (subcode.size() == 0) {
++correctFields;
continue;
}
bool correct = correctChecksum(subcode);
if (correct) {
code += subcode;
code.deleteLastChar();
++correctFields;
} else {
if (i == correctFields) { //first incorrect field
message += Common::String::format("#%d", i + 1);
} else {
message += Common::String::format(", #%d", i + 1);
}
}
}
if (message.size() > 0) {
Common::String messageTemplate;
if (CODE_FIELDS - correctFields == 1) messageTemplate = _("Field %s has a mistake in it.");
else messageTemplate = _("Fields %s have mistakes in them.");
message = Common::String::format(messageTemplate.c_str(), message.c_str());
}
bool ok = false;
if (correctFields == CODE_FIELDS && code.size() > 0) {
//the last 3 chars must be an encoded crc16
if (code.size() > 3) {
uint32 size = code.size();
uint32 gotcrc = decodeHashchar(code[size-3]) | (decodeHashchar(code[size-2]) << 6) | (decodeHashchar(code[size-1]) << 12);
code.erase(size - 3);
uint32 crc = crc16(code);
ok = (crc == gotcrc);
}
if (ok) message = _("All OK!");
else message = _("Invalid code");
}
_connectWidget->setEnabled(ok);
_messageWidget->setLabel(message);
break;
}
case kConnectCmd: {
Common::String code;
for (uint32 i = 0; i < CODE_FIELDS; ++i) {
Common::String subcode = _codeWidget[i]->getEditString();
if (subcode.size() == 0) continue;
code += subcode;
code.deleteLastChar();
}
code.erase(code.size() - 3);
CloudMan.connectStorage(_storageId, code);
setResult(1);
close();
break;
}
#ifdef USE_SDL_NET
case kStorageCodePassedCmd:
CloudMan.connectStorage(_storageId, LocalServer.indexPageHandler().code());
_close = true;
break;
#endif
default:
Dialog::handleCommand(sender, cmd, data);
}
}
void StorageWizardDialog::handleTickle() {
if (_close) {
setResult(1);
close();
}
Dialog::handleTickle();
}
int StorageWizardDialog::decodeHashchar(char c) {
const char HASHCHARS[65] = "0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ?!";
for (uint32 i = 0; i < 64; ++i)
if (c == HASHCHARS[i])
return i;
return -1;
}
bool StorageWizardDialog::correctChecksum(Common::String s) {
if (s.size() == 0) return false; //no last char
int providedChecksum = decodeHashchar(s.lastChar());
int calculatedChecksum = 0x2A; //any initial value would do, but it must equal to the one used on the page where these checksums were generated
for (uint32 i = 0; i < s.size()-1; ++i) {
calculatedChecksum = calculatedChecksum ^ s[i];
}
return providedChecksum == (calculatedChecksum % 64);
}
uint32 StorageWizardDialog::crc16(Common::String s) { //"CRC16_CCITT_FALSE"
uint32 crc = 0xFFFF, x;
for (uint32 i = 0; i < s.size(); ++i) {
x = ((crc >> 8) ^ s[i]) & 0xFF;
x ^= x >> 4;
crc = ((crc << 8) ^ (x << 12) ^ (x << 5) ^ x) & 0xFFFF;
}
return crc;
}
} // End of namespace GUI
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