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<?php
/* vim: set expandtab sw=4 ts=4 sts=4: */
/**
* Form management class, displays and processes forms
*
* Explanation of used terms:
* o work_path - original field path, eg. Servers/4/verbose
* o system_path - work_path modified so that it points to the first server,
* eg. Servers/1/verbose
* o translated_path - work_path modified for HTML field name, a path with
* slashes changed to hyphens, eg. Servers-4-verbose
*
* @package PhpMyAdmin
*/
/**
* Core libraries.
*/
require_once './libraries/config/FormDisplay.tpl.php';
require_once './libraries/config/Validator.class.php';
require_once './libraries/js_escape.lib.php';
/**
* Form management class, displays and processes forms
*
* @package PhpMyAdmin
*/
class FormDisplay
{
/**
* ConfigFile instance
* @var ConfigFile
*/
private $_configFile;
/**
* Form list
* @var Form[]
*/
private $_forms = array();
/**
* Stores validation errors, indexed by paths
* [ Form_name ] is an array of form errors
* [path] is a string storing error associated with single field
* @var array
*/
private $_errors = array();
/**
* Paths changed so that they can be used as HTML ids, indexed by paths
* @var array
*/
private $_translatedPaths = array();
/**
* Server paths change indexes so we define maps from current server
* path to the first one, indexed by work path
* @var array
*/
private $_systemPaths = array();
/**
* Language strings which will be sent to PMA_messages JS variable
* Will be looked up in $GLOBALS: str{value} or strSetup{value}
* @var array
*/
private $_jsLangStrings = array();
/**
* Tells whether forms have been validated
* @var bool
*/
private $_isValidated = true;
/**
* Dictionary with user preferences keys
* @var array|null
*/
private $_userprefsKeys;
/**
* Dictionary with disallowed user preferences keys
* @var array
*/
private $_userprefsDisallow;
/**
* Constructor
*
* @param ConfigFile $cf Config file instance
*/
public function __construct(ConfigFile $cf)
{
$this->_jsLangStrings = array(
'error_nan_p' => __('Not a positive number!'),
'error_nan_nneg' => __('Not a non-negative number!'),
'error_incorrect_port' => __('Not a valid port number!'),
'error_invalid_value' => __('Incorrect value!'),
'error_value_lte' => __('Value must be equal or lower than %s!'));
$this->_configFile = $cf;
// initialize validators
PMA_Validator::getValidators($this->_configFile);
}
/**
* Returns {@link ConfigFile} associated with this instance
*
* @return ConfigFile
*/
public function getConfigFile()
{
return $this->_configFile;
}
/**
* Registers form in form manager
*
* @param string $form_name Form name
* @param array $form Form data
* @param int $server_id 0 if new server, validation; >= 1 if editing a server
*
* @return void
*/
public function registerForm($form_name, array $form, $server_id = null)
{
$this->_forms[$form_name] = new Form(
$form_name, $form, $this->_configFile, $server_id
);
$this->_isValidated = false;
foreach ($this->_forms[$form_name]->fields as $path) {
$work_path = $server_id === null
? $path
: str_replace('Servers/1/', "Servers/$server_id/", $path);
$this->_systemPaths[$work_path] = $path;
$this->_translatedPaths[$work_path] = str_replace('/', '-', $work_path);
}
}
/**
* Processes forms, returns true on successful save
*
* @param bool $allow_partial_save allows for partial form saving
* on failed validation
* @param bool $check_form_submit whether check for $_POST['submit_save']
*
* @return boolean whether processing was successful
*/
public function process($allow_partial_save = true, $check_form_submit = true)
{
if ($check_form_submit && !isset($_POST['submit_save'])) {
return false;
}
// save forms
if (count($this->_forms) > 0) {
return $this->save(array_keys($this->_forms), $allow_partial_save);
}
return false;
}
/**
* Runs validation for all registered forms
*
* @return void
*/
private function _validate()
{
if ($this->_isValidated) {
return;
}
$paths = array();
$values = array();
foreach ($this->_forms as $form) {
/* @var $form Form */
$paths[] = $form->name;
// collect values and paths
foreach ($form->fields as $path) {
$work_path = array_search($path, $this->_systemPaths);
$values[$path] = $this->_configFile->getValue($work_path);
$paths[] = $path;
}
}
// run validation
$errors = PMA_Validator::validate(
$this->_configFile, $paths, $values, false
);
// change error keys from canonical paths to work paths
if (is_array($errors) && count($errors) > 0) {
$this->_errors = array();
foreach ($errors as $path => $error_list) {
$work_path = array_search($path, $this->_systemPaths);
// field error
if (! $work_path) {
// form error, fix path
$work_path = $path;
}
$this->_errors[$work_path] = $error_list;
}
}
$this->_isValidated = true;
}
/**
* Outputs HTML for the forms under the menu tab
*
* @param bool $show_restore_default whether to show "restore default"
* button besides the input field
* @param array &$js_default stores JavaScript code
* to be displayed
* @param array &$js will be updated with javascript code
* @param bool $show_buttons whether show submit and reset button
*
* @return string $htmlOutput
*/
private function _displayForms(
$show_restore_default, array &$js_default, array &$js, $show_buttons
) {
$htmlOutput = '';
$validators = PMA_Validator::getValidators($this->_configFile);
foreach ($this->_forms as $form) {
/* @var $form Form */
$form_desc = isset($GLOBALS["strConfigForm_{$form->name}_desc"])
? PMA_lang("Form_{$form->name}_desc")
: '';
$form_errors = isset($this->_errors[$form->name])
? $this->_errors[$form->name] : null;
$htmlOutput .= PMA_displayFieldsetTop(
PMA_lang("Form_$form->name"),
$form_desc,
$form_errors,
array('id' => $form->name)
);
foreach ($form->fields as $field => $path) {
$work_path = array_search($path, $this->_systemPaths);
$translated_path = $this->_translatedPaths[$work_path];
// always true/false for user preferences display
// otherwise null
$userprefs_allow = isset($this->_userprefsKeys[$path])
? !isset($this->_userprefsDisallow[$path])
: null;
// display input
$htmlOutput .= $this->_displayFieldInput(
$form,
$field,
$path,
$work_path,
$translated_path,
$show_restore_default,
$userprefs_allow,
$js_default
);
// register JS validators for this field
if (isset($validators[$path])) {
PMA_addJsValidate($translated_path, $validators[$path], $js);
}
}
$htmlOutput .= PMA_displayFieldsetBottom($show_buttons);
}
return $htmlOutput;
}
/**
* Outputs HTML for forms
*
* @param bool $tabbed_form if true, use a form with tabs
* @param bool $show_restore_default whether show "restore default" button
* besides the input field
* @param bool $show_buttons whether show submit and reset button
* @param string $form_action action attribute for the form
* @param array $hidden_fields array of form hidden fields (key: field
* name)
*
* @return string HTML for forms
*/
public function getDisplay(
$tabbed_form = false,
$show_restore_default = false,
$show_buttons = true,
$form_action = null,
$hidden_fields = null
) {
static $js_lang_sent = false;
$htmlOutput = '';
$js = array();
$js_default = array();
$htmlOutput .= PMA_displayFormTop($form_action, 'post', $hidden_fields);
if ($tabbed_form) {
$tabs = array();
foreach ($this->_forms as $form) {
$tabs[$form->name] = PMA_lang("Form_$form->name");
}
$htmlOutput .= PMA_displayTabsTop($tabs);
}
// validate only when we aren't displaying a "new server" form
$is_new_server = false;
foreach ($this->_forms as $form) {
/* @var $form Form */
if ($form->index === 0) {
$is_new_server = true;
break;
}
}
if (! $is_new_server) {
$this->_validate();
}
// user preferences
$this->_loadUserprefsInfo();
// display forms
$htmlOutput .= $this->_displayForms(
$show_restore_default, $js_default, $js, $show_buttons
);
if ($tabbed_form) {
$htmlOutput .= PMA_displayTabsBottom();
}
$htmlOutput .= PMA_displayFormBottom();
// if not already done, send strings used for validation to JavaScript
if (! $js_lang_sent) {
$js_lang_sent = true;
$js_lang = array();
foreach ($this->_jsLangStrings as $strName => $strValue) {
$js_lang[] = "'$strName': '" . PMA_jsFormat($strValue, false) . '\'';
}
$js[] = "$.extend(PMA_messages, {\n\t"
. implode(",\n\t", $js_lang) . '})';
}
$js[] = "$.extend(defaultValues, {\n\t"
. implode(",\n\t", $js_default) . '})';
$htmlOutput .= PMA_displayJavascript($js);
return $htmlOutput;
}
/**
* Prepares data for input field display and outputs HTML code
*
* @param Form $form Form object
* @param string $field field name as it appears in $form
* @param string $system_path field path, eg. Servers/1/verbose
* @param string $work_path work path, eg. Servers/4/verbose
* @param string $translated_path work path changed so that it can be
* used as XHTML id
* @param bool $show_restore_default whether show "restore default" button
* besides the input field
* @param bool|null $userprefs_allow whether user preferences are enabled
* for this field (null - no support,
* true/false - enabled/disabled)
* @param array &$js_default array which stores JavaScript code
* to be displayed
*
* @return string HTML for input field
*/
private function _displayFieldInput(
Form $form, $field, $system_path, $work_path,
$translated_path, $show_restore_default, $userprefs_allow, array &$js_default
) {
$name = PMA_langName($system_path);
$description = PMA_langName($system_path, 'desc', '');
$value = $this->_configFile->get($work_path);
$value_default = $this->_configFile->getDefault($system_path);
$value_is_default = false;
if ($value === null || $value === $value_default) {
$value = $value_default;
$value_is_default = true;
}
$opts = array(
'doc' => $this->getDocLink($system_path),
'show_restore_default' => $show_restore_default,
'userprefs_allow' => $userprefs_allow,
'userprefs_comment' => PMA_langName($system_path, 'cmt', ''));
if (isset($form->default[$system_path])) {
$opts['setvalue'] = $form->default[$system_path];
}
if (isset($this->_errors[$work_path])) {
$opts['errors'] = $this->_errors[$work_path];
}
$type = '';
switch ($form->getOptionType($field)) {
case 'string':
$type = 'text';
break;
case 'short_string':
$type = 'short_text';
break;
case 'double':
case 'integer':
$type = 'number_text';
break;
case 'boolean':
$type = 'checkbox';
break;
case 'select':
$type = 'select';
$opts['values'] = $form->getOptionValueList($form->fields[$field]);
break;
case 'array':
$type = 'list';
$value = (array) $value;
$value_default = (array) $value_default;
break;
case 'group':
// :group:end is changed to :group:end:{unique id} in Form class
$htmlOutput = '';
if (/*overload*/mb_substr($field, 7, 4) != 'end:') {
$htmlOutput .= PMA_displayGroupHeader(
/*overload*/mb_substr($field, 7)
);
} else {
PMA_displayGroupFooter();
}
return $htmlOutput;
case 'NULL':
trigger_error("Field $system_path has no type", E_USER_WARNING);
return null;
}
// detect password fields
if ($type === 'text'
&& /*overload*/mb_substr($translated_path, -9) === '-password'
) {
$type = 'password';
}
// TrustedProxies requires changes before displaying
if ($system_path == 'TrustedProxies') {
foreach ($value as $ip => &$v) {
if (!preg_match('/^-\d+$/', $ip)) {
$v = $ip . ': ' . $v;
}
}
}
$this->_setComments($system_path, $opts);
// send default value to form's JS
$js_line = '\'' . $translated_path . '\': ';
switch ($type) {
case 'text':
case 'short_text':
case 'number_text':
case 'password':
$js_line .= '\'' . PMA_escapeJsString($value_default) . '\'';
break;
case 'checkbox':
$js_line .= $value_default ? 'true' : 'false';
break;
case 'select':
$value_default_js = is_bool($value_default)
? (int) $value_default
: $value_default;
$js_line .= '[\'' . PMA_escapeJsString($value_default_js) . '\']';
break;
case 'list':
$js_line .= '\'' . PMA_escapeJsString(implode("\n", $value_default))
. '\'';
break;
}
$js_default[] = $js_line;
return PMA_displayInput(
$translated_path, $name, $type, $value,
$description, $value_is_default, $opts
);
}
/**
* Displays errors
*
* @return string HTML for errors
*/
public function displayErrors()
{
$this->_validate();
if (count($this->_errors) == 0) {
return null;
}
$htmlOutput = '';
foreach ($this->_errors as $system_path => $error_list) {
if (isset($this->_systemPaths[$system_path])) {
$path = $this->_systemPaths[$system_path];
$name = PMA_langName($path);
} else {
$name = $GLOBALS["strConfigForm_$system_path"];
}
$htmlOutput .= PMA_displayErrors($name, $error_list);
}
return $htmlOutput;
}
/**
* Reverts erroneous fields to their default values
*
* @return void
*/
public function fixErrors()
{
$this->_validate();
if (count($this->_errors) == 0) {
return;
}
$cf = $this->_configFile;
foreach (array_keys($this->_errors) as $work_path) {
if (!isset($this->_systemPaths[$work_path])) {
continue;
}
$canonical_path = $this->_systemPaths[$work_path];
$cf->set($work_path, $cf->getDefault($canonical_path));
}
}
/**
* Validates select field and casts $value to correct type
*
* @param string &$value Current value
* @param array $allowed List of allowed values
*
* @return bool
*/
private function _validateSelect(&$value, array $allowed)
{
$value_cmp = is_bool($value)
? (int) $value
: $value;
foreach ($allowed as $vk => $v) {
// equality comparison only if both values are numeric or not numeric
// (allows to skip 0 == 'string' equalling to true)
// or identity (for string-string)
if (($vk == $value && !(is_numeric($value_cmp) xor is_numeric($vk)))
|| $vk === $value
) {
// keep boolean value as boolean
if (!is_bool($value)) {
settype($value, gettype($vk));
}
return true;
}
}
return false;
}
/**
* Validates and saves form data to session
*
* @param array|string $forms array of form names
* @param bool $allow_partial_save allows for partial form saving on
* failed validation
*
* @return boolean true on success (no errors and all saved)
*/
public function save($forms, $allow_partial_save = true)
{
$result = true;
$forms = (array) $forms;
$values = array();
$to_save = array();
$is_setup_script = defined('PMA_SETUP');
if ($is_setup_script) {
$this->_loadUserprefsInfo();
}
$this->_errors = array();
foreach ($forms as $form_name) {
/* @var $form Form */
if (isset($this->_forms[$form_name])) {
$form = $this->_forms[$form_name];
} else {
continue;
}
// get current server id
$change_index = $form->index === 0
? $this->_configFile->getServerCount() + 1
: false;
// grab POST values
foreach ($form->fields as $field => $system_path) {
$work_path = array_search($system_path, $this->_systemPaths);
$key = $this->_translatedPaths[$work_path];
$type = $form->getOptionType($field);
// skip groups
if ($type == 'group') {
continue;
}
// ensure the value is set
if (!isset($_POST[$key])) {
// checkboxes aren't set by browsers if they're off
if ($type == 'boolean') {
$_POST[$key] = false;
} else {
$this->_errors[$form->name][] = sprintf(
__('Missing data for %s'),
'<i>' . PMA_langName($system_path) . '</i>'
);
$result = false;
continue;
}
}
// user preferences allow/disallow
if ($is_setup_script
&& isset($this->_userprefsKeys[$system_path])
) {
if (isset($this->_userprefsDisallow[$system_path])
&& isset($_POST[$key . '-userprefs-allow'])
) {
unset($this->_userprefsDisallow[$system_path]);
} else if (!isset($_POST[$key . '-userprefs-allow'])) {
$this->_userprefsDisallow[$system_path] = true;
}
}
// cast variables to correct type
switch ($type) {
case 'double':
settype($_POST[$key], 'float');
break;
case 'boolean':
case 'integer':
if ($_POST[$key] !== '') {
settype($_POST[$key], $type);
}
break;
case 'select':
$successfully_validated = $this->_validateSelect(
$_POST[$key],
$form->getOptionValueList($system_path)
);
if (! $successfully_validated) {
$this->_errors[$work_path][] = __('Incorrect value!');
$result = false;
continue;
}
break;
case 'string':
case 'short_string':
$_POST[$key] = trim($_POST[$key]);
break;
case 'array':
// eliminate empty values and ensure we have an array
$post_values = is_array($_POST[$key])
? $_POST[$key]
: explode("\n", $_POST[$key]);
$_POST[$key] = array();
$this->_fillPostArrayParameters($post_values, $key);
break;
}
// now we have value with proper type
$values[$system_path] = $_POST[$key];
if ($change_index !== false) {
$work_path = str_replace(
"Servers/$form->index/",
"Servers/$change_index/", $work_path
);
}
$to_save[$work_path] = $system_path;
}
}
// save forms
if (!$allow_partial_save && !empty($this->_errors)) {
// don't look for non-critical errors
$this->_validate();
return $result;
}
foreach ($to_save as $work_path => $path) {
// TrustedProxies requires changes before saving
if ($path == 'TrustedProxies') {
$proxies = array();
$i = 0;
foreach ($values[$path] as $value) {
$matches = array();
$match = preg_match(
"/^(.+):(?:[ ]?)(\\w+)$/", $value, $matches
);
if ($match) {
// correct 'IP: HTTP header' pair
$ip = trim($matches[1]);
$proxies[$ip] = trim($matches[2]);
} else {
// save also incorrect values
$proxies["-$i"] = $value;
$i++;
}
}
$values[$path] = $proxies;
}
$this->_configFile->set($work_path, $values[$path], $path);
}
if ($is_setup_script) {
$this->_configFile->set(
'UserprefsDisallow',
array_keys($this->_userprefsDisallow)
);
}
// don't look for non-critical errors
$this->_validate();
return $result;
}
/**
* Tells whether form validation failed
*
* @return boolean
*/
public function hasErrors()
{
return count($this->_errors) > 0;
}
/**
* Returns link to documentation
*
* @param string $path Path to documentation
*
* @return string
*/
public function getDocLink($path)
{
$test = /*overload*/mb_substr($path, 0, 6);
if ($test == 'Import' || $test == 'Export') {
return '';
}
return PMA_Util::getDocuLink(
'config',
'cfg_' . $this->_getOptName($path)
);
}
/**
* Changes path so it can be used in URLs
*
* @param string $path Path
*
* @return string
*/
private function _getOptName($path)
{
return str_replace(array('Servers/1/', '/'), array('Servers/', '_'), $path);
}
/**
* Fills out {@link userprefs_keys} and {@link userprefs_disallow}
*
* @return void
*/
private function _loadUserprefsInfo()
{
if ($this->_userprefsKeys !== null) {
return;
}
$this->_userprefsKeys = array_flip(PMA_readUserprefsFieldNames());
// read real config for user preferences display
$userprefs_disallow = defined('PMA_SETUP')
? $this->_configFile->get('UserprefsDisallow', array())
: $GLOBALS['cfg']['UserprefsDisallow'];
$this->_userprefsDisallow = array_flip($userprefs_disallow);
}
/**
* Sets field comments and warnings based on current environment
*
* @param string $system_path Path to settings
* @param array &$opts Chosen options
*
* @return void
*/
private function _setComments($system_path, array &$opts)
{
// RecodingEngine - mark unavailable types
if ($system_path == 'RecodingEngine') {
$comment = '';
if (!function_exists('iconv')) {
$opts['values']['iconv'] .= ' (' . __('unavailable') . ')';
$comment = sprintf(
__('"%s" requires %s extension'), 'iconv', 'iconv'
);
}
if (!function_exists('recode_string')) {
$opts['values']['recode'] .= ' (' . __('unavailable') . ')';
$comment .= ($comment ? ", " : '') . sprintf(
__('"%s" requires %s extension'),
'recode', 'recode'
);
}
if (!function_exists('mb_convert_encoding')) {
$opts['values']['mb'] .= ' (' . __('unavailable') . ')';
$comment .= ($comment ? ", " : '') . sprintf(
__('"%s" requires %s extension'),
'mb', 'mbstring'
);
}
$opts['comment'] = $comment;
$opts['comment_warning'] = true;
}
// ZipDump, GZipDump, BZipDump - check function availability
if ($system_path == 'ZipDump'
|| $system_path == 'GZipDump'
|| $system_path == 'BZipDump'
) {
$comment = '';
$funcs = array(
'ZipDump' => array('zip_open', 'gzcompress'),
'GZipDump' => array('gzopen', 'gzencode'),
'BZipDump' => array('bzopen', 'bzcompress'));
if (!function_exists($funcs[$system_path][0])) {
$comment = sprintf(
__(
'Compressed import will not work due to missing function %s.'
),
$funcs[$system_path][0]
);
}
if (!function_exists($funcs[$system_path][1])) {
$comment .= ($comment ? '; ' : '') . sprintf(
__(
'Compressed export will not work due to missing function %s.'
),
$funcs[$system_path][1]
);
}
$opts['comment'] = $comment;
$opts['comment_warning'] = true;
}
if (!defined('PMA_SETUP')) {
if (($system_path == 'MaxDbList' || $system_path == 'MaxTableList'
|| $system_path == 'QueryHistoryMax')
) {
$opts['comment'] = sprintf(
__('maximum %s'), $GLOBALS['cfg'][$system_path]
);
}
}
}
/**
* Copy items of an array to $_POST variable
*
* @param array $post_values List of parameters
* @param string $key Array key
*
* @return void
*/
private function _fillPostArrayParameters($post_values, $key)
{
foreach ($post_values as $v) {
$v = trim($v);
if ($v !== '') {
$_POST[$key][] = $v;
}
}
}
}
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