/** 
 * @file llpanellogin.cpp
 * @brief Login dialog and logo display
 *
 * $LicenseInfo:firstyear=2002&license=viewerlgpl$
 * Second Life Viewer Source Code
 * Copyright (C) 2010, Linden Research, Inc.
 * 
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation;
 * version 2.1 of the License only.
 * 
 * This library 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
 * Lesser General Public License for more details.
 * 
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
 * 
 * Linden Research, Inc., 945 Battery Street, San Francisco, CA  94111  USA
 * $/LicenseInfo$
 */

#include "llviewerprecompiledheaders.h"

#include "llviewerbuildconfig.h"

#include "llpanellogin.h"
#include "lllayoutstack.h"

#include "indra_constants.h"		// for key and mask constants
#include "llfloaterreg.h"
#include "llfontgl.h"
#include "llmd5.h"
#include "v4color.h"

#include "llappviewer.h"
#include "llbutton.h"
#include "llcheckboxctrl.h"
#include "llcommandhandler.h"		// for secondlife:///app/login/
#include "llcombobox.h"
#include "llviewercontrol.h"
#include "llfloaterpreference.h"
#include "llfocusmgr.h"
#include "lllineeditor.h"
#include "llnotificationsutil.h"
#include "llsecapi.h"
#include "llstartup.h"
#include "lltextbox.h"
#include "llui.h"
#include "lluiconstants.h"
#include "llslurl.h"
#include "llversioninfo.h"
#include "llviewerhelp.h"
#include "llviewertexturelist.h"
#include "llviewermenu.h"			// for handle_preferences()
#include "llviewernetwork.h"
#include "llviewerwindow.h"			// to link into child list
#include "llweb.h"
#include "llmediactrl.h"
#include "llrootview.h"

#include "lltrans.h"
#include "llpanelloginlistener.h"

#include <boost/algorithm/string.hpp>

#include "llsdserialize.h"

LLPanelLogin *LLPanelLogin::sInstance = nullptr;
BOOL LLPanelLogin::sCapslockDidNotification = FALSE;
BOOL LLPanelLogin::sCredentialSet = FALSE;

class LLLoginLocationAutoHandler : public LLCommandHandler
{
public:
	// don't allow from external browsers
	LLLoginLocationAutoHandler() : LLCommandHandler("location_login", UNTRUSTED_BLOCK) { }
	bool handle(const LLSD& tokens, const LLSD& query_map, LLMediaCtrl* web)
	{	
		if (LLStartUp::getStartupState() < STATE_LOGIN_CLEANUP)
		{
			if ( tokens.size() == 0 || tokens.size() > 4 ) 
				return false;

			// unescape is important - uris with spaces are escaped in this code path
			// (e.g. space -> %20) and the code to log into a region doesn't support that.
			const std::string region = LLURI::unescape( tokens[0].asString() );

			// just region name as payload 
			if ( tokens.size() == 1 )
			{
				// region name only - slurl will end up as center of region
				LLSLURL slurl(region);
				LLPanelLogin::autologinToLocation(slurl);
			}
			else
			// region name and x coord as payload 
			if ( tokens.size() == 2 )
			{
				// invalid to only specify region and x coordinate
				// slurl code will revert to same as region only, so do this anyway
				LLSLURL slurl(region);
				LLPanelLogin::autologinToLocation(slurl);
			}
			else
			// region name and x/y coord as payload 
			if ( tokens.size() == 3 )
			{
				// region and x/y specified - default z to 0
				F32 xpos;
				std::istringstream codec(tokens[1].asString());
				codec >> xpos;

				F32 ypos;
				codec.clear();
				codec.str(tokens[2].asString());
				codec >> ypos;

				const LLVector3 location(xpos, ypos, 0.0f);
				LLSLURL slurl(region, location);

				LLPanelLogin::autologinToLocation(slurl);
			}
			else
			// region name and x/y/z coord as payload 
			if ( tokens.size() == 4 )
			{
				// region and x/y/z specified - ok
				F32 xpos;
				std::istringstream codec(tokens[1].asString());
				codec >> xpos;

				F32 ypos;
				codec.clear();
				codec.str(tokens[2].asString());
				codec >> ypos;

				F32 zpos;
				codec.clear();
				codec.str(tokens[3].asString());
				codec >> zpos;

				const LLVector3 location(xpos, ypos, zpos);
				LLSLURL slurl(region, location);

				LLPanelLogin::autologinToLocation(slurl);
			};
		}	
		return true;
	}
};
LLLoginLocationAutoHandler gLoginLocationAutoHandler;

//---------------------------------------------------------------------------
// Public methods
//---------------------------------------------------------------------------
LLPanelLogin::LLPanelLogin(const LLRect &rect,
						 void (*callback)(S32 option, void* user_data),
						 void *cb_data)
:	LLPanel(),
	mLogoImage(),
	mListener(new LLPanelLoginListener(this)),
	mCallback(callback),
	mCallbackData(cb_data),
	mLoginWidgetStack(nullptr),
	mShowFavorites(false)
{
	setBackgroundVisible(FALSE);
	setBackgroundOpaque(TRUE);

	mPasswordModified = FALSE;

	sInstance = this;

	LLView* login_holder = gViewerWindow->getLoginPanelHolder();
	if (login_holder)
	{
		login_holder->addChild(this);
	}

	// Logo
	mLogoImage = LLUI::getUIImage("startup_logo");

	buildFromFile( "panel_login.xml");

	reshape(rect.getWidth(), rect.getHeight());

	LLLineEditor* password_edit(getChild<LLLineEditor>("password_edit"));
	password_edit->setKeystrokeCallback(onPassKey, this);
	// STEAM-14: When user presses Enter with this field in focus, initiate login
	password_edit->setCommitCallback(boost::bind(&LLPanelLogin::onClickConnect, this));

	// change z sort of clickable text to be behind buttons
	sendChildToBack(getChildView("forgot_password_text"));

	auto favorites_combo = getChild<LLComboBox>("start_location_combo");
	updateLocationSelectorsVisibility(); // separate so that it can be called from preferences
	favorites_combo->setReturnCallback(boost::bind(&LLPanelLogin::onClickConnect, this));
	favorites_combo->setFocusLostCallback(boost::bind(&LLPanelLogin::onLocationSLURL, this));
	
	LLComboBox* server_choice_combo = getChild<LLComboBox>("server_combo");
	server_choice_combo->setCommitCallback(boost::bind(&LLPanelLogin::onSelectServer, this));
	
	refreshGridList();
	mGridListChangedConnection = LLGridManager::getInstance()->addGridListChangedCallback(boost::bind(&LLPanelLogin::refreshGridList, this));

	LLSLURL start_slurl(LLStartUp::getStartSLURL());
	if ( !start_slurl.isSpatial() ) // has a start been established by the command line or NextLoginLocation ? 
	{
		// no, so get the preference setting
		std::string defaultStartLocation = gSavedSettings.getString("LoginLocation");
		LL_INFOS("AppInit")<<"default LoginLocation '"<<defaultStartLocation<<"'"<<LL_ENDL;
		LLSLURL defaultStart(defaultStartLocation);
		if ( defaultStart.isSpatial() )
		{
			LLStartUp::setStartSLURL(defaultStart);
		}
		else
		{
			LL_INFOS("AppInit")<<"no valid LoginLocation, using home"<<LL_ENDL;
			LLSLURL homeStart(LLSLURL::SIM_LOCATION_HOME);
			LLStartUp::setStartSLURL(homeStart);
		}
	}
	else
	{
		LLPanelLogin::onUpdateStartSLURL(start_slurl); // updates grid if needed
	}
	
	childSetAction("connect_btn", onClickConnect, this);

	getChild<LLPanel>("links_login_panel")->setDefaultBtn("connect_btn");

	LLTextBox* forgot_password_text = getChild<LLTextBox>("forgot_password_text");
	forgot_password_text->setClickedCallback(onClickForgotPassword, nullptr);

	LLButton* sign_up_text = getChild<LLButton>("create_new_account_btn");
	sign_up_text->setClickedCallback(onClickSignUp, NULL);

	// get the web browser control
	LLMediaCtrl* web_browser = getChild<LLMediaCtrl>("login_html");
	web_browser->addObserver(this);

	reshapeBrowser();

	loadLoginPage();

	LLComboBox* username_combo(getChild<LLComboBox>("username_combo"));
	username_combo->setTextChangedCallback(boost::bind(&LLPanelLogin::addFavoritesToStartLocation, this));
	// STEAM-14: When user presses Enter with this field in focus, initiate login
	username_combo->setCommitCallback(boost::bind(&LLPanelLogin::onClickConnect, this));
	username_combo->setKeystrokeOnEsc(TRUE);

	mLoginWidgetStack = getChild<LLLayoutStack>("login_widgets");

#if USE_FMODSTUDIO
	getChild<LLUICtrl>("fmod_text")->setVisible(TRUE);
	getChild<LLUICtrl>("fmod_logo")->setVisible(TRUE);
#endif
}

void LLPanelLogin::addFavoritesToStartLocation()
{
	// Clear the combo.
	LLComboBox* combo = getChild<LLComboBox>("start_location_combo");
	if (!combo) return;
	S32 num_items = combo->getItemCount();
	for (S32 i = num_items - 1; i > 1; i--)
	{
		combo->remove(i);
	}

	// Load favorites into the combo.
	std::string user_defined_name = getChild<LLComboBox>("username_combo")->getSimple();
	LLStringUtil::toLower(user_defined_name);
	std::replace(user_defined_name.begin(), user_defined_name.end(), '.', ' ');
	std::string filename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "stored_favorites_" + LLGridManager::getInstance()->getGrid() + ".xml");
	std::string old_filename = gDirUtilp->getExpandedFilename(LL_PATH_USER_SETTINGS, "stored_favorites.xml");

	std::string::size_type index = user_defined_name.find(' ');
	if (index != std::string::npos)
	{
		std::string username = user_defined_name.substr(0, index);
		std::string lastname = user_defined_name.substr(index+1);
		if (lastname == "resident")
		{
			user_defined_name = username;
		}
	}

	LLSD fav_llsd;
	llifstream file;
	file.open(filename);
	if (!file.is_open())
	{
		file.open(old_filename);
		if (!file.is_open()) return;
	}
	LLSDSerialize::fromXML(fav_llsd, file);

	for (LLSD::map_const_iterator iter = fav_llsd.beginMap();
		iter != fav_llsd.endMap(); ++iter)
	{
		// The account name in stored_favorites.xml has Resident last name even if user has
		// a single word account name, so it can be compared case-insensitive with the
		// user defined "firstname lastname".
		S32 res = LLStringUtil::compareInsensitive(user_defined_name, iter->first);
		if (res != 0)
		{
			LL_DEBUGS() << "Skipping favorites for " << iter->first << LL_ENDL;
			continue;
		}

		combo->addSeparator();
		LL_DEBUGS() << "Loading favorites for " << iter->first << LL_ENDL;
		LLSD user_llsd = iter->second;
		for (LLSD::array_const_iterator iter1 = user_llsd.beginArray();
			iter1 != user_llsd.endArray(); ++iter1)
		{
			std::string label = (*iter1)["name"].asString();
			std::string value = (*iter1)["slurl"].asString();
			if (!label.empty() && !value.empty())
			{
				mShowFavorites = true;
				combo->add(label, value);
				if ( LLStartUp::getStartSLURL().getSLURLString() == value)
				{
					combo->selectByValue(value);
				}
			}
		}
		break;
	}
}

// force the size to be correct (XML doesn't seem to be sufficient to do this)
// (with some padding so the other login screen doesn't show through)
void LLPanelLogin::reshapeBrowser()
{
	LLMediaCtrl* web_browser = getChild<LLMediaCtrl>("login_html");
	LLRect rect = gViewerWindow->getWindowRectScaled();
	LLRect html_rect;
	html_rect.setCenterAndSize(
		rect.getCenterX() - 2, rect.getCenterY() + 40,
		rect.getWidth() + 6, rect.getHeight() - 78 );
	web_browser->setRect( html_rect );
	web_browser->reshape( html_rect.getWidth(), html_rect.getHeight(), TRUE );
	reshape( rect.getWidth(), rect.getHeight(), 1 );
}

LLPanelLogin::~LLPanelLogin()
{
	if (mGridListChangedConnection.connected())
		mGridListChangedConnection.disconnect();
	
	LLPanelLogin::sInstance = nullptr;

	// Controls having keyboard focus by default
	// must reset it on destroy. (EXT-2748)
	gFocusMgr.setDefaultKeyboardFocus(nullptr);
}

// virtual
void LLPanelLogin::draw()
{
	gGL.pushMatrix();
	{
		F32 image_aspect = 1.333333f;
		F32 view_aspect = (F32)getRect().getWidth() / (F32)getRect().getHeight();
		// stretch image to maintain aspect ratio
		if (image_aspect > view_aspect)
		{
			gGL.translatef(-0.5f * (image_aspect / view_aspect - 1.f) * getRect().getWidth(), 0.f, 0.f);
			gGL.scalef(image_aspect / view_aspect, 1.f, 1.f);
		}

		S32 width = getRect().getWidth();
		S32 height = getRect().getHeight();

		if (mLoginWidgetStack->getVisible())
		{
			// draw a background box in black
			gl_rect_2d( 0, height - 264, width, 264, LLColor4::black );
			// draw the bottom part of the background image
			// just the blue background to the native client UI
			mLogoImage->draw(0, -264, width + 8, mLogoImage->getHeight());
		};
	}
	gGL.popMatrix();

	LLPanel::draw();
}

// virtual
BOOL LLPanelLogin::handleKeyHere(KEY key, MASK mask)
{
	if ( KEY_F1 == key )
	{
		LLViewerHelp* vhelp = LLViewerHelp::getInstance();
		vhelp->showTopic(vhelp->f1HelpTopic());
		return TRUE;
	}

	return LLPanel::handleKeyHere(key, mask);
}

// virtual 
void LLPanelLogin::setFocus(BOOL b)
{
	if(b != hasFocus())
	{
		if(b)
		{
			giveFocus();
		}
		else
		{
			LLPanel::setFocus(b);
		}
	}
}

// static
void LLPanelLogin::giveFocus()
{
	if( sInstance )
	{
		// Grab focus and move cursor to first blank input field
		std::string username = sInstance->getChild<LLUICtrl>("username_combo")->getValue().asString();
		std::string pass = sInstance->getChild<LLUICtrl>("password_edit")->getValue().asString();

		BOOL have_username = !username.empty();
		BOOL have_pass = !pass.empty();

		LLLineEditor* edit = nullptr;
		LLComboBox* combo = nullptr;
		if (have_username && !have_pass)
		{
			// User saved his name but not his password.  Move
			// focus to password field.
			edit = sInstance->getChild<LLLineEditor>("password_edit");
		}
		else
		{
			// User doesn't have a name, so start there.
			combo = sInstance->getChild<LLComboBox>("username_combo");
		}

		if (edit)
		{
			edit->setFocus(TRUE);
			edit->selectAll();
		}
		else if (combo)
		{
			combo->setFocus(TRUE);
		}
	}
}

// static
void LLPanelLogin::showLoginWidgets()
{
	if (sInstance)
	{
		// *NOTE: Mani - This may or may not be obselete code.
		// It seems to be part of the defunct? reg-in-client project.
		sInstance->getChildView("login_widgets")->setVisible( true);
		LLMediaCtrl* web_browser = sInstance->getChild<LLMediaCtrl>("login_html");
		sInstance->reshapeBrowser();
		// *TODO: Append all the usual login parameters, like first_login=Y etc.
		std::string splash_screen_url = LLGridManager::getInstance()->getLoginPage();
		web_browser->navigateTo( splash_screen_url, HTTP_CONTENT_TEXT_HTML );
		LLUICtrl* username_combo = sInstance->getChild<LLUICtrl>("username_combo");
		username_combo->setFocus(TRUE);
	}
}

// static
void LLPanelLogin::show(const LLRect &rect,
						void (*callback)(S32 option, void* user_data),
						void* callback_data)
{
    if (!LLPanelLogin::sInstance)
    {
        new LLPanelLogin(rect, callback, callback_data);
    }

	if( !gFocusMgr.getKeyboardFocus() )
	{
		// Grab focus and move cursor to first enabled control
		sInstance->setFocus(TRUE);
	}

	// Make sure that focus always goes here (and use the latest sInstance that was just created)
	gFocusMgr.setDefaultKeyboardFocus(sInstance);
}

// static
void LLPanelLogin::setFields(LLPointer<LLCredential> credential,
							 BOOL remember)
{
	if (!sInstance)
	{
		LL_WARNS() << "Attempted fillFields with no login view shown" << LL_ENDL;
		return;
	}
	sCredentialSet = TRUE;
	LL_INFOS("Credentials") << "Setting login fields to " << *credential << LL_ENDL;

	LLSD identifier = credential->getIdentifier();
	if(identifier["type"].asString() == "agent")
	{
		std::string firstname = identifier["first_name"].asString();
		std::string lastname = identifier["last_name"].asString();
	    std::string login_id = firstname;
	    if (!lastname.empty() && lastname != "Resident")
	    {
		    // support traditional First Last name SLURLs
		    login_id += " ";
		    login_id += lastname;
	    }
		sInstance->getChild<LLComboBox>("username_combo")->setLabel(login_id);	
	}
	else if(identifier["type"].asString() == "account")
	{
		sInstance->getChild<LLComboBox>("username_combo")->setLabel(identifier["account_name"].asString());
	}
	else
	{
		sInstance->getChild<LLComboBox>("username_combo")->setLabel(LLStringUtil::null);
	}
	sInstance->addFavoritesToStartLocation();
	// if the password exists in the credential, set the password field with
	// a filler to get some stars
	LLSD authenticator = credential->getAuthenticator();
	LL_INFOS("Credentials") << "Setting authenticator field " << authenticator["type"].asString() << LL_ENDL;
	if(authenticator.isMap() && 
	   authenticator.has("secret") && 
	   (authenticator["secret"].asString().size() > 0))
	{
		
		// This is a MD5 hex digest of a password.
		// We don't actually use the password input field, 
		// fill it with MAX_PASSWORD characters so we get a 
		// nice row of asterisks.
		const std::string filler("123456789!123456");
		sInstance->getChild<LLUICtrl>("password_edit")->setValue(filler);
	}
	else
	{
		sInstance->getChild<LLUICtrl>("password_edit")->setValue(LLStringUtil::null);		
	}
	sInstance->getChild<LLUICtrl>("remember_check")->setValue(remember);
}


// static
void LLPanelLogin::getFields(LLPointer<LLCredential>& credential,
							 BOOL& remember)
{
	if (!sInstance)
	{
		LL_WARNS() << "Attempted getFields with no login view shown" << LL_ENDL;
		return;
	}
	
	// load the credential so we can pass back the stored password or hash if the user did
	// not modify the password field.
	
	credential = gSecAPIHandler->loadCredential(LLGridManager::getInstance()->getGrid());

	LLSD identifier = LLSD::emptyMap();
	LLSD authenticator = LLSD::emptyMap();
	
	if(credential.notNull())
	{
		authenticator = credential->getAuthenticator();
	}

	std::string username = sInstance->getChild<LLUICtrl>("username_combo")->getValue().asString();
	LLStringUtil::trim(username);
	std::string password = sInstance->getChild<LLUICtrl>("password_edit")->getValue().asString();

	LL_INFOS("Credentials", "Authentication") << "retrieving username:" << username << LL_ENDL;
	// determine if the username is a first/last form or not.
	size_t separator_index = username.find_first_of(' ');
	if (separator_index == username.npos
		&& !LLGridManager::getInstance()->isSystemGrid())
	{
		LL_INFOS("Credentials", "Authentication") << "account: " << username << LL_ENDL;
		// single username, so this is a 'clear' identifier
		identifier["type"] = CRED_IDENTIFIER_TYPE_ACCOUNT;
		identifier["account_name"] = username;
		
		if (LLPanelLogin::sInstance->mPasswordModified)
		{
			authenticator = LLSD::emptyMap();
			// password is plaintext
			authenticator["type"] = CRED_AUTHENTICATOR_TYPE_CLEAR;
			authenticator["secret"] = password;
		}
	}
	else
	{
		// Be lenient in terms of what separators we allow for two-word names
		// and allow legacy users to login with firstname.lastname
		separator_index = username.find_first_of(" ._");
		std::string first = username.substr(0, separator_index);
		std::string last;
		if (separator_index != username.npos)
		{
			last = username.substr(separator_index+1, username.npos);
		LLStringUtil::trim(last);
		}
		else
		{
			// ...on Linden grids, single username users as considered to have
			// last name "Resident"
			// *TODO: Make login.cgi support "account_name" like above
			last = "Resident";
		}
		
		if (last.find_first_of(' ') == last.npos)
		{
			LL_INFOS("Credentials", "Authentication") << "agent: " << username << LL_ENDL;
			// traditional firstname / lastname
			identifier["type"] = CRED_IDENTIFIER_TYPE_AGENT;
			identifier["first_name"] = first;
			identifier["last_name"] = last;
		
			if (LLPanelLogin::sInstance->mPasswordModified)
			{
	            if (password.length() > 16 && LLGridManager::getInstance()->isInSecondlife())
	            {
	                LLNotificationsUtil::add("SecondLifePasswordTooLong");
	                LLStringUtil::truncate(password, 16);
	            }
				authenticator = LLSD::emptyMap();
				authenticator["type"] = CRED_AUTHENTICATOR_TYPE_HASH;
				authenticator["algorithm"] = "md5";
				LLMD5 pass((const U8 *)password.c_str());
				char md5pass[33];               /* Flawfinder: ignore */
				pass.hex_digest(md5pass);
				authenticator["secret"] = md5pass;
			}
		}
	}
	credential = gSecAPIHandler->createCredential(LLGridManager::getInstance()->getGrid(), identifier, authenticator);
	remember = sInstance->getChild<LLUICtrl>("remember_check")->getValue();
}


// static
BOOL LLPanelLogin::areCredentialFieldsDirty()
{
	if (!sInstance)
	{
		LL_WARNS() << "Attempted getServer with no login view shown" << LL_ENDL;
	}
	else
	{
		LLComboBox* combo = sInstance->getChild<LLComboBox>("username_combo");
		if(combo && combo->isDirty())
		{
			return true;
		}
		LLLineEditor* ctrl = sInstance->getChild<LLLineEditor>("password_edit");
		if(ctrl && ctrl->isDirty()) 
		{
			return true;
		}
	}
	return false;	
}


// static
void LLPanelLogin::updateLocationSelectorsVisibility()
{
	if (sInstance) 
	{
		BOOL show_start = gSavedSettings.getBOOL("ShowStartLocation");
		sInstance->getChild<LLLayoutPanel>("start_location_panel")->setVisible(show_start);

		BOOL show_server = gSavedSettings.getBOOL("ForceShowGrid");
		sInstance->getChild<LLLayoutPanel>("grid_panel")->setVisible(show_server);
	}	
}

// static - called from LLStartUp::setStartSLURL
void LLPanelLogin::onUpdateStartSLURL(const LLSLURL& new_start_slurl)
{
	if (!sInstance) return;

	LL_DEBUGS("AppInit")<<new_start_slurl.asString()<<LL_ENDL;

	LLComboBox* location_combo = sInstance->getChild<LLComboBox>("start_location_combo");
	/*
	 * Determine whether or not the new_start_slurl modifies the grid.
	 *
	 * Note that some forms that could be in the slurl are grid-agnostic.,
	 * such as "home".  Other forms, such as
	 * https://grid.example.com/region/Party%20Town/20/30/5 
	 * specify a particular grid; in those cases we want to change the grid
	 * and the grid selector to match the new value.
	 */
	enum LLSLURL::SLURL_TYPE new_slurl_type = new_start_slurl.getType();
	switch ( new_slurl_type )
	{
	case LLSLURL::LOCATION:
	  {
		std::string slurl_grid = LLGridManager::getInstance()->getGrid(new_start_slurl.getGrid());
		if ( ! slurl_grid.empty() ) // is that a valid grid?
		{
			if ( slurl_grid != LLGridManager::getInstance()->getGrid() ) // new grid?
			{
				// the slurl changes the grid, so update everything to match
				LLGridManager::getInstance()->setGridChoice(slurl_grid);

				// update the grid selector to match the slurl
				LLComboBox* server_combo = sInstance->getChild<LLComboBox>("server_combo");
				std::string server_label(LLGridManager::getInstance()->getGridLabel(slurl_grid));
				server_combo->setSimple(server_label);

				updateServer(); // to change the links and splash screen
			}
			location_combo->setTextEntry(new_start_slurl.getLocationString());
		}
		else
		{
			// the grid specified by the slurl is not known
			LLNotificationsUtil::add("InvalidLocationSLURL");
			LL_WARNS("AppInit")<<"invalid LoginLocation:"<<new_start_slurl.asString()<<LL_ENDL;
			location_combo->setTextEntry(LLStringUtil::null);
		}
	  }
 	break;

	case LLSLURL::HOME_LOCATION:
		location_combo->setCurrentByIndex(1); // home location
		break;
		
	case LLSLURL::LAST_LOCATION:
		location_combo->setCurrentByIndex(0); // last location
		break;

	default:
		LL_WARNS("AppInit")<<"invalid login slurl, using home"<<LL_ENDL;
		location_combo->setCurrentByIndex(1); // home location
		break;
	}
}

void LLPanelLogin::setLocation(const LLSLURL& slurl)
{
	LL_DEBUGS("AppInit")<<"setting Location "<<slurl.asString()<<LL_ENDL;
	LLStartUp::setStartSLURL(slurl); // calls onUpdateStartSLURL, above
}

void LLPanelLogin::autologinToLocation(const LLSLURL& slurl)
{
	LL_DEBUGS("AppInit")<<"automatically logging into Location "<<slurl.asString()<<LL_ENDL;
	LLStartUp::setStartSLURL(slurl); // calls onUpdateStartSLURL, above

	if ( LLPanelLogin::sInstance != NULL )
	{
		void* unused_parameter = 0;
		LLPanelLogin::sInstance->onClickConnect(unused_parameter);
	}
}


// static
void LLPanelLogin::closePanel()
{
	if (sInstance)
	{
		if (LLPanelLogin::sInstance->getParent())
		{
			LLPanelLogin::sInstance->getParent()->removeChild(LLPanelLogin::sInstance);
		}

		delete sInstance;
		sInstance = nullptr;
	}
}

// static
void LLPanelLogin::setAlwaysRefresh(bool refresh)
{
	if (sInstance && LLStartUp::getStartupState() < STATE_LOGIN_CLEANUP)
	{
		LLMediaCtrl* web_browser = sInstance->getChild<LLMediaCtrl>("login_html");

		if (web_browser)
		{
			web_browser->setAlwaysRefresh(refresh);
		}
	}
}



void LLPanelLogin::loadLoginPage()
{
	if (!sInstance) return;

	LLURI login_page = LLURI(LLGridManager::getInstance()->getLoginPage());
	LLSD params(login_page.queryMap());

	LL_DEBUGS("AppInit") << "login_page: " << login_page << LL_ENDL;

	// Language
	params["lang"] = LLUI::getLanguage();

	// First Login?
	if (gSavedSettings.getBOOL("FirstLoginThisInstall"))
	{
		params["firstlogin"] = "TRUE"; // not bool: server expects string TRUE
	}

	// Channel and Version
	params["version"] = llformat("%s (%d)",
								 LLVersionInfo::getShortVersion().c_str(),
								 LLVersionInfo::getBuild());
	params["channel"] = LLVersionInfo::getChannel();

	// Grid
	params["grid"] = LLGridManager::getInstance()->getGridId();

	// add OS info
	params["os"] = LLOSInfo::instance().getOSStringSimple();

	// sourceid
	params["sourceid"] = gSavedSettings.getString("sourceid");

	// login page (web) content version
	params["login_content_version"] = gSavedSettings.getString("LoginContentVersion");

	// Make an LLURI with this augmented info
	LLURI login_uri(LLURI::buildHTTP(login_page.scheme(),
									 login_page.authority(),
									 login_page.path(),
									 params));

	gViewerWindow->setMenuBackgroundColor(false);

	LLMediaCtrl* web_browser = sInstance->getChild<LLMediaCtrl>("login_html");
	if (web_browser->getCurrentNavUrl() != login_uri.asString())
	{
		LL_DEBUGS("AppInit") << "loading:    " << login_uri << LL_ENDL;
		web_browser->navigateTo( login_uri.asString(), HTTP_CONTENT_TEXT_HTML );
	}
}

void LLPanelLogin::handleMediaEvent(LLPluginClassMedia* /*self*/, EMediaEvent event)
{
}

//---------------------------------------------------------------------------
// Protected methods
//---------------------------------------------------------------------------
// static
void LLPanelLogin::onClickConnect(void *)
{
	if (sInstance && sInstance->mCallback)
	{
		// JC - Make sure the fields all get committed.
		sInstance->setFocus(FALSE);

		LLComboBox* combo = sInstance->getChild<LLComboBox>("server_combo");
		LLSD combo_val = combo->getSelectedValue();

		// the grid definitions may come from a user-supplied grids.xml, so they may not be good
		LL_DEBUGS("AppInit") << "grid " << combo_val.asString() << LL_ENDL;

		LLGridManager::getInstance()->setGridChoice(combo_val.asString());

		// The start location SLURL has already been sent to LLStartUp::setStartSLURL

		std::string username = sInstance->getChild<LLUICtrl>("username_combo")->getValue().asString();
		std::string password = sInstance->getChild<LLUICtrl>("password_edit")->getValue().asString();

		if (username.empty())
		{
			// user must type in something into the username field
			LLNotificationsUtil::add("MustHaveAccountToLogIn");
		}
		else if (password.empty())
		{
			LLNotificationsUtil::add("MustEnterPasswordToLogIn");
		}
		else
		{
		    sCredentialSet = FALSE;
            string_vec_t login_uris;
			LLGridManager::getInstance()->getLoginURIs(login_uris);
			if (std::none_of(login_uris.begin(), login_uris.end(),
				[](auto& uri) -> bool { return boost::algorithm::starts_with(uri, "https://"); }
			))
			{
				//LLSD payload;
				//payload["username"] = username;
				//payload["password"] = password;
				LLNotificationsUtil::add("InsecureLogin",
					LLSD().with("GRID", LLGridManager::getInstance()->getGridLabel()), LLSD(), &connectCallback);
				return;
			}
			connect();
		}
	}
}
			
//static 
void LLPanelLogin::connectCallback(const LLSD& notification, const LLSD& response)
{
	S32 option = LLNotificationsUtil::getSelectedOption(notification, response);
	if (option != 0)  return;

	connect();
}

// static
void LLPanelLogin::connect()
{
	if (sInstance && sInstance->mCallback)
	{
		LLPointer<LLCredential> cred;
		BOOL remember;
		getFields(cred, remember);
		std::string identifier_type;
		cred->identifierType(identifier_type);
		LLSD allowed_credential_types;
		LLGridManager::getInstance()->getLoginIdentifierTypes(allowed_credential_types);

		// check the typed in credential type against the credential types expected by the server.
		for (LLSD::array_iterator i = allowed_credential_types.beginArray();
			i != allowed_credential_types.endArray();
			i++)
		{

			if (i->asString() == identifier_type)
			{
				// yay correct credential type
				sInstance->mCallback(0, sInstance->mCallbackData);
				return;
			}
		}

		// Right now, maingrid is the only thing that is picky about
		// credential format, as it doesn't yet allow account (single username)
		// format creds.  - Rox.  James, we wanna fix the message when we change
		// this.
		LLNotificationsUtil::add("InvalidCredentialFormat");
	}
}

// static
void LLPanelLogin::onClickVersion(void*)
{
	LLFloaterReg::showInstance("sl_about"); 
}

//static
void LLPanelLogin::onClickForgotPassword(void*)
{
	if (sInstance )
	{
		LLWeb::loadURLExternal(LLGridManager::getInstance()->getForgotPasswordURL());
	}
}

// static
void LLPanelLogin::onClickSignUp(void*)
{
	if (sInstance)
	{
		LLWeb::loadURLExternal(LLGridManager::getInstance()->getCreateAccountURL());
	}
}

// static
void LLPanelLogin::onPassKey(LLLineEditor* caller, void* user_data)
{
	LLPanelLogin *self = (LLPanelLogin *)user_data;
	self->mPasswordModified = TRUE;
	if (gKeyboard->getKeyDown(KEY_CAPSLOCK) && sCapslockDidNotification == FALSE)
	{
		// *TODO: use another way to notify user about enabled caps lock, see EXT-6858
		sCapslockDidNotification = TRUE;
	}
}


void LLPanelLogin::updateServer()
{
	if (sInstance)
	{
		// if they've selected another grid, we should load the credentials
        // for that grid and set them to the UI.
        if(!sInstance->areCredentialFieldsDirty())
        {
            LLPointer<LLCredential> credential = gSecAPIHandler->loadCredential(LLGridManager::getInstance()->getGrid());
            bool remember = sInstance->getChild<LLUICtrl>("remember_check")->getValue();
            sInstance->setFields(credential, remember);
        }

        // Want to vanish not only create_new_account_btn, but also the
        // title text over it, so turn on/off the whole layout_panel element.
        sInstance->getChild<LLLayoutPanel>("links")->setVisible(!LLGridManager::getInstance()->getCreateAccountURL().empty());
        sInstance->getChildView("forgot_password_text")->setVisible(!LLGridManager::getInstance()->getForgotPasswordURL().empty());

        // grid changed so show new splash screen (possibly)
        loadLoginPage();
	}
}

void LLPanelLogin::onSelectServer()
{
	// The user twiddled with the grid choice ui.
	// apply the selection to the grid setting.
	LLPointer<LLCredential> credential;

	LLComboBox* server_combo = getChild<LLComboBox>("server_combo");
	LLSD server_combo_val = server_combo->getSelectedValue();
	LL_INFOS("AppInit") << "grid "<<server_combo_val.asString()<< LL_ENDL;
	LLGridManager::getInstance()->setGridChoice(server_combo_val.asString());
	addFavoritesToStartLocation();
	
	/*
	 * Determine whether or not the value in the start_location_combo makes sense
	 * with the new grid value.
	 *
	 * Note that some forms that could be in the location combo are grid-agnostic,
	 * such as "MyRegion/128/128/0".  There could be regions with that name on any
	 * number of grids, so leave them alone.  Other forms, such as
	 * https://grid.example.com/region/Party%20Town/20/30/5 specify a particular
	 * grid; in those cases we want to clear the location.
	 */
	LLComboBox* location_combo = getChild<LLComboBox>("start_location_combo");
	S32 index = location_combo->getCurrentIndex();
	switch (index)
	{
	case 0: // last location
	case 1: // home location
		// do nothing - these are grid-agnostic locations
		break;
		
	default:
		{
			std::string location = location_combo->getValue().asString();
			LLSLURL slurl(location); // generata a slurl from the location combo contents
			if (   slurl.getType() == LLSLURL::LOCATION
				&& slurl.getGrid() != LLGridManager::getInstance()->getGrid()
				)
			{
				// the grid specified by the location is not this one, so clear the combo
				location_combo->setCurrentByIndex(0); // last location on the new grid
				location_combo->setTextEntry(LLStringUtil::null);
			}
		}			
		break;
	}

	updateServer();
}

void LLPanelLogin::onLocationSLURL()
{
	LLComboBox* location_combo = getChild<LLComboBox>("start_location_combo");
	std::string location = location_combo->getValue().asString();
	LL_DEBUGS("AppInit")<<location<<LL_ENDL;

	LLStartUp::setStartSLURL(location); // calls onUpdateStartSLURL, above 
}

// static
bool LLPanelLogin::getShowFavorites()
{
	return gSavedPerAccountSettings.getBOOL("ShowFavoritesOnLogin");
}

void LLPanelLogin::refreshGridList()
{
	LLComboBox* server_choice_combo = getChild<LLComboBox>("server_combo");
	server_choice_combo->removeall();
	
	const std::string& current_grid = LLGridManager::getInstance()->getGrid();
	std::map<std::string, std::string> known_grids = LLGridManager::getInstance()->getKnownGrids();
	for (std::map<std::string, std::string>::iterator grid_choice = known_grids.begin();
		 grid_choice != known_grids.end(); grid_choice++)
	{
		if (!grid_choice->first.empty() && current_grid != grid_choice->first)
		{
			server_choice_combo->add(grid_choice->second, grid_choice->first);
		}
	}
	server_choice_combo->sortByName();
	server_choice_combo->addSeparator(ADD_TOP);
	server_choice_combo->add(LLGridManager::getInstance()->getGridLabel(), current_grid, ADD_TOP);
	server_choice_combo->selectFirstItem();
	updateServer();
}
