/*

 * AJAX-based intelligent login interface

 */

/*

 * FRONTEND

 */

/**

 * Performs a logon as a regular member.

 */

window.ajaxLogonToMember = function()

{

	// IE <6 pseudo-compatibility

	if ( KILL_SWITCH )

		return true;

	if ( auth_level >= USER_LEVEL_MEMBER )

		return true;

	ajaxLoginInit(function(k)

		{

			if ( on_main_page && main_page_members != physical_title )

			{

				window.location = makeUrl(main_page_members);

			}

			else

			{

				window.location.reload();

			}

		}, USER_LEVEL_MEMBER);

}

/**

 * Authenticates to the highest level the current user is allowed to go to.

 */

window.ajaxLogonToElev = function()

{

	if ( auth_level == user_level )

		return true;

	ajaxLoginInit(function(k)

		{

			ENANO_SID = k;

			var url = String(' ' + window.location).substr(1);

			url = append_sid(url);

			window.location = url;

		}, user_level);

}

/*

 * BACKEND

 */

/**

 * Holding object for various AJAX authentication information.

 * @var object

 */

var logindata = {};

/**

 * Path to the image used to indicate loading progress

 * @var string

 */

if ( !ajax_login_loadimg_path )

	var ajax_login_loadimg_path = false;

if ( !ajax_login_successimg_path )

	var ajax_login_successimg_path = false;

if ( !ajax_login_lockimg_path )

	var ajax_login_lockimg_path = false;

/**

 * Status variables

 * @var int

 */

var AJAX_STATUS_LOADING_KEY = 1;

var AJAX_STATUS_GENERATING_KEY = 2;

var AJAX_STATUS_LOGGING_IN = 3;

var AJAX_STATUS_SUCCESS = 4;

var AJAX_STATUS_ERROR = 5;

var AJAX_STATUS_DESTROY = 65535;

/**

 * State constants

 * @var int

 */

var AJAX_STATE_EARLY_INIT = 1;

var AJAX_STATE_LOADING_KEY = 2;

/**

 * Switch to decide if DiffieHellman shows a "browser incompatible" error

 * @var bool

 */

var ajax_login_prevent_dh = ( IE && !IE_8 ) || ( is_iPhone && !is_iPhone_3 );

/**

 * Time to wait to focus the controls.

 * @var int

 */

var AJAX_LOGIN_FOCUS_WAIT = aclDisableTransitionFX ? 0 : 750;

/**

 * Performs the AJAX request to get an encryption key and from there spawns the login form.

 * @param function The function that will be called once authentication completes successfully.

 * @param int The security level to authenticate at - see http://docs.enanocms.org/Help:Appendix_B

 */

window.ajaxLoginInit = function(call_on_finish, user_level)

{

	load_component(['messagebox', 'flyin', 'fadefilter', 'jquery', 'jquery-ui', 'l10n', 'crypto']);

	logindata = {};

	var title = ( user_level > USER_LEVEL_MEMBER ) ? $lang.get('user_login_ajax_prompt_title_elev') : $lang.get('user_login_ajax_prompt_title');

	logindata.mb_object = new MessageBox(MB_OKCANCEL | MB_ICONLOCK, title, '');

	//

	// Cancel function: called when the "Cancel" button is clicked

	//

	logindata.mb_object.onclick['Cancel'] = function()

	{

		// Hide the error message, if any

		$('#ajax_login_error_box').remove();

		// Hide the captcha, if any

		if ( document.getElementById('autoCaptcha') )

		{

			var to = fly_out_top(document.getElementById('autoCaptcha'), false, true);

			setTimeout(function() {

					var d = document.getElementById('autoCaptcha');

					d.parentNode.removeChild(d);

				}, to);

		}

		// Ask the server to delete the encryption key we're using

		ajaxLoginPerformRequest({

				mode: 'clean_key',

				key_aes: logindata.key_aes,

				key_dh: logindata.key_dh

		});

	};

	// Clicking OK will not cause the box to destroy, as this function returns true.

	logindata.mb_object.onbeforeclick['OK'] = function()

	{

		// Just call the submitter and let it take care of everything

		ajaxLoginSubmitForm();

		return true;

	}

	// Fetch the inner content area

	logindata.mb_inner = document.getElementById('messageBox').getElementsByTagName('div')[0];

	// Initialize state

	logindata.showing_status = false;

	logindata.user_level = user_level;

	logindata.successfunc = call_on_finish;

	logindata.start_time = (new Date()).getTime();

	// Build the "loading" window

	ajaxLoginSetStatus(AJAX_STATUS_LOADING_KEY);

	// Request the key

	ajaxLoginPerformRequest({ mode: 'getkey' });

}

/**

 * For compatibility only. Really, folks, it's ajaxLoginInit. If you need a

 * mnemonic device, use "two 'in's."

 */

window.ajaxLogonInit = function(call_on_finish, user_level)

{

	return ajaxLoginInit(call_on_finish, user_level);

}

/**

 * Sets the contents of the AJAX login window to the appropriate status message.

 * @param int One of AJAX_STATUS_* constants

 */

window.ajaxLoginSetStatus = function(status)

{

	if ( !logindata.mb_inner )

		return false;

	if ( logindata.showing_status )

	{

		var div = document.getElementById('ajax_login_status');

		if ( div )

			logindata.mb_inner.removeChild(div);

	}

	switch(status)

	{

		case AJAX_STATUS_LOADING_KEY:

			// Create the status div

			var div = document.createElement('div');

			div.id = 'ajax_login_status';

			div.style.marginTop = '10px';

			div.style.textAlign = 'center';

			// The circly ball ajaxy image + status message

			var status_msg = $lang.get('user_login_ajax_fetching_key');

			// Insert the status message

			div.appendChild(document.createTextNode(status_msg));

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			var img = document.createElement('img');

			img.src = ( ajax_login_loadimg_path ) ? ajax_login_loadimg_path : scriptPath + '/images/loading-big.gif';

			div.appendChild(img);

			// Another coupla brs

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			// The link to the full login form

			var small = document.createElement('small');

			small.innerHTML = $lang.get('user_login_ajax_link_fullform', { link_full_form: makeUrlNS('Special', 'Login/' + title) });

			div.appendChild(small);

			// Insert the entire message into the login window

			logindata.mb_inner.innerHTML = '';

			logindata.mb_inner.appendChild(div);

			break;

		case AJAX_STATUS_GENERATING_KEY:

			// Create the status div

			var div = document.createElement('div');

			div.id = 'ajax_login_status';

			div.style.marginTop = '10px';

			div.style.textAlign = 'center';

			// The circly ball ajaxy image + status message

			var status_msg = $lang.get('user_login_ajax_generating_key');

			// Insert the status message

			div.appendChild(document.createTextNode(status_msg));

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			var img = document.createElement('img');

			img.src = ( ajax_login_lockimg_path ) ? ajax_login_lockimg_path : scriptPath + '/images/lock48.png';

			div.appendChild(img);

			// Another coupla brs

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			// The link to the full login form

			var small = document.createElement('small');

			small.innerHTML = $lang.get('user_login_ajax_link_fullform_dh', { link_full_form: makeUrlNS('Special', 'Login/' + title) });

			div.appendChild(small);

			// Insert the entire message into the login window

			logindata.mb_inner.innerHTML = '';

			logindata.mb_inner.appendChild(div);

			break;

		case AJAX_STATUS_LOGGING_IN:

			// Create the status div

			var div = document.createElement('div');

			div.id = 'ajax_login_status';

			div.style.marginTop = '10px';

			div.style.textAlign = 'center';

			// The circly ball ajaxy image + status message

			var status_msg = $lang.get('user_login_ajax_loggingin');

			// Insert the status message

			div.appendChild(document.createTextNode(status_msg));

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			var img = document.createElement('img');

			img.src = ( ajax_login_loadimg_path ) ? ajax_login_loadimg_path : scriptPath + '/images/loading-big.gif';

			div.appendChild(img);

			// Insert the entire message into the login window

			logindata.mb_inner.innerHTML = '';

			logindata.mb_inner.appendChild(div);

			break;

		case AJAX_STATUS_SUCCESS:

			// Create the status div

			var div = document.createElement('div');

			div.id = 'ajax_login_status';

			div.style.marginTop = '10px';

			div.style.textAlign = 'center';

			// The circly ball ajaxy image + status message

			var status_msg = $lang.get('user_login_success_short');

			// Insert the status message

			div.appendChild(document.createTextNode(status_msg));

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			var img = document.createElement('img');

			img.src = ( ajax_login_successimg_path ) ? ajax_login_successimg_path : scriptPath + '/images/check.png';

			div.appendChild(img);

			// Insert the entire message into the login window

			logindata.mb_inner.innerHTML = '';

			logindata.mb_inner.appendChild(div);

			break;

		case AJAX_STATUS_ERROR:

			// Create the status div

			var div = document.createElement('div');

			div.id = 'ajax_login_status';

			div.style.marginTop = '10px';

			div.style.textAlign = 'center';

			// The circly ball ajaxy image + status message

			var status_msg = $lang.get('user_login_ajax_err_crypto');

			// Insert the status message

			div.appendChild(document.createTextNode(status_msg));

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			var img = document.createElement('img');

			img.src = ( ajax_login_successimg_path ) ? ajax_login_successimg_path : scriptPath + '/images/checkbad.png';

			div.appendChild(img);

			// Append a br or two to space things properly

			div.appendChild(document.createElement('br'));

			div.appendChild(document.createElement('br'));

			// The circly ball ajaxy image + status message

			var detail_msg = $lang.get('user_login_ajax_err_crypto_details');

			var full_link = $lang.get('user_login_ajax_err_crypto_link');

			var link = document.createElement('a');

			link.href = makeUrlNS('Special', 'Login/' + title, 'level=' + logindata.user_level, true);

			link.appendChild(document.createTextNode(full_link));

			var span = document.createElement('span');

			span.style.fontSize = 'smaller';

			// Insert the message

			span.appendChild(document.createTextNode(detail_msg + ' '));

			span.appendChild(link);

			div.appendChild(span);

			// Insert the entire message into the login window

			logindata.mb_inner.innerHTML = '';

			logindata.mb_inner.appendChild(div);

			break;

		default:

			eval(setHook('login_set_status'));

			break;

		case AJAX_STATUS_DESTROY:

		case null:

		case undefined:

			logindata.showing_status = false;

			return;

			break;

	}

	logindata.showing_status = true;

}

/**

 * Performs an AJAX logon request to the server and calls ajaxLoginProcessResponse() on the result.

 * @param object JSON packet to send

 * @param function Optional function to call on the response as well.

 */

window.ajaxLoginPerformRequest = function(json, _hookfunc)

{

	json = toJSONString(json);

	json = ajaxEscape(json);

	var hookfunc = typeof(_hookfunc) == 'function' ? _hookfunc : false;

	ajaxPost(makeUrlNS('Special', 'Login/action.json'), 'r=' + json, function(ajax)

		{

			if ( ajax.readyState == 4 && ajax.status == 200 )

			{

				// parse response

				var response = String(ajax.responseText + '');

				if ( !check_json_response(response) )

				{

					handle_invalid_json(response);

					return false;

				}

				response = parseJSON(response);

				ajaxLoginProcessResponse(response, hookfunc);

			}

		}, true);

}

/**

 * Processes a response from the login server

 * @param object JSON response

 */

window.ajaxLoginProcessResponse = function(response, hookfunc)

{

	// Did the server send a plaintext error?

	if ( response.mode == 'error' )

	{

		if ( logindata.mb_object )

		{

			logindata.mb_object.destroy();

			var error_msg = $lang.get('user_' + ( response.error.toLowerCase() ));

			new MessageBox(MB_ICONSTOP | MB_OK, $lang.get('user_err_login_generic_title'), error_msg);

		}

		else

		{

			alert(response.error);

		}

		return false;

	}

	// Main mode switch

	switch ( response.mode )

	{

		case 'initial':

			// Rid ourselves of any loading windows

			ajaxLoginSetStatus(AJAX_STATUS_DESTROY);

			// show any errors

			ajaxLoginShowFriendlyError(response);

			// The server wants us to build the login form, all the information is there

			ajaxLoginBuildForm(response);

			break;

		case 'login_success':

			ajaxLoginSetStatus(AJAX_STATUS_SUCCESS);

			logindata.successfunc(response.key, response);

			break;

		case 'reset_pass_used':

			// We logged in with a temporary password. Prompt the user to go to the temp password page and

			// reset their real password. If they click no, treat it as a login failure, as no session key

			// is actually issued when this type of login is performed.

			var conf = confirm($lang.get('user_login_ajax_msg_used_temp_pass'));

			if ( conf )

			{

				var url = makeUrlNS('Special', 'PasswordReset/stage2/' + response.user_id + '/' + response.temp_password);

				window.location = url;

				break;

			}

			// else, treat as a failure

		default:

			// Rid ourselves of any loading windows

			ajaxLoginSetStatus(AJAX_STATUS_DESTROY);

			document.getElementById('messageBox').style.backgroundColor = '#C0C0C0';

			var mb_parent = document.getElementById('messageBox').parentNode;

			$(mb_parent).effect("shake", {}, 200);

			setTimeout(function()

				{

					document.getElementById('messageBox').style.backgroundColor = '#FFF';

					console.debug(response);

					ajaxLoginShowFriendlyError(response);

					ajaxLoginBuildForm(response);

				}, 2500);

			break;

		case 'logout_success':

			if ( ENANO_SID )

			{

				ajaxLoginReplaceSIDInline(false, ENANO_SID, USER_LEVEL_MEMBER);

			}

			break;

		case 'noop':

			break;

	}

	if ( hookfunc )

	{

		hookfunc(response);

	}

}

/*

 * RESPONSE HANDLERS

 */