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<?php

/**
 * Error collection class that enables HTML Purifier to report HTML
 * problems back to the user
 */
class HTMLPurifier_ErrorCollector
{

/**
     * Identifiers for the returned error array. These are purposely numeric
     * so list() can be used.
     */
    const LINENO   = 0;
    const SEVERITY = 1;
    const MESSAGE  = 2;
    const CHILDREN = 3;

/**
     * @type array
     */
    protected $errors;

/**
     * @type array
     */
    protected $_current;

/**
     * @type array
     */
    protected $_stacks = array(array());

/**
     * @type HTMLPurifier_Language
     */
    protected $locale;

/**
     * @type HTMLPurifier_Generator
     */
    protected $generator;

/**
     * @type HTMLPurifier_Context
     */
    protected $context;

/**
     * @type array
     */
    protected $lines = array();

/**
     * @param HTMLPurifier_Context $context
     */
    public function __construct($context)
    {
        $this->locale    =& $context->get('Locale');
        $this->context   = $context;
        $this->_current  =& $this->_stacks[0];
        $this->errors    =& $this->_stacks[0];
    }

/**
     * Sends an error message to the collector for later use
     * @param int $severity Error severity, PHP error style (don't use E_USER_)
     * @param string $msg Error message text
     */
    public function send($severity, $msg)
    {
        $args = array();
        if (func_num_args() > 2) {
            $args = func_get_args();
            array_shift($args);
            unset($args[0]);
        }

$token = $this->context->get('CurrentToken', true);
        $line  = $token ? $token->line : $this->context->get('CurrentLine', true);
        $col   = $token ? $token->col  : $this->context->get('CurrentCol', true);
        $attr  = $this->context->get('CurrentAttr', true);

// perform special substitutions, also add custom parameters
        $subst = array();
        if (!is_null($token)) {
            $args['CurrentToken'] = $token;
        }
        if (!is_null($attr)) {
            $subst['$CurrentAttr.Name'] = $attr;
            if (isset($token->attr[$attr])) {
                $subst['$CurrentAttr.Value'] = $token->attr[$attr];
            }
        }

if (empty($args)) {
            $msg = $this->locale->getMessage($msg);
        } else {
            $msg = $this->locale->formatMessage($msg, $args);
        }

if (!empty($subst)) {
            $msg = strtr($msg, $subst);
        }

// (numerically indexed)
        $error = array(
            self::LINENO   => $line,
            self::SEVERITY => $severity,
            self::MESSAGE  => $msg,
            self::CHILDREN => array()
        );
        $this->_current[] = $error;

// NEW CODE BELOW ...
        // Top-level errors are either:
        //  TOKEN type, if $value is set appropriately, or
        //  "syntax" type, if $value is null
        $new_struct = new HTMLPurifier_ErrorStruct();
        $new_struct->type = HTMLPurifier_ErrorStruct::TOKEN;
        if ($token) {
            $new_struct->value = clone $token;
        }
        if (is_int($line) && is_int($col)) {
            if (isset($this->lines[$line][$col])) {
                $struct = $this->lines[$line][$col];
            } else {
                $struct = $this->lines[$line][$col] = $new_struct;
            }
            // These ksorts may present a performance problem
            ksort($this->lines[$line], SORT_NUMERIC);
        } else {
            if (isset($this->lines[-1])) {
                $struct = $this->lines[-1];
            } else {
                $struct = $this->lines[-1] = $new_struct;
            }
        }
        ksort($this->lines, SORT_NUMERIC);

// Now, check if we need to operate on a lower structure
        if (!empty($attr)) {
            $struct = $struct->getChild(HTMLPurifier_ErrorStruct::ATTR, $attr);
            if (!$struct->value) {
                $struct->value = array($attr, 'PUT VALUE HERE');
            }
        }
        if (!empty($cssprop)) {
            $struct = $struct->getChild(HTMLPurifier_ErrorStruct::CSSPROP, $cssprop);
            if (!$struct->value) {
                // if we tokenize CSS this might be a little more difficult to do
                $struct->value = array($cssprop, 'PUT VALUE HERE');
            }
        }

// Ok, structs are all setup, now time to register the error
        $struct->addError($severity, $msg);
    }

/**
     * Retrieves raw error data for custom formatter to use
     */
    public function getRaw()
    {
        return $this->errors;
    }

/**
     * Default HTML formatting implementation for error messages
     * @param HTMLPurifier_Config $config Configuration, vital for HTML output nature
     * @param array $errors Errors array to display; used for recursion.
     * @return string
     */
    public function getHTMLFormatted($config, $errors = null)
    {
        $ret = array();

$this->generator = new HTMLPurifier_Generator($config, $this->context);
        if ($errors === null) {
            $errors = $this->errors;
        }

// 'At line' message needs to be removed

// generation code for new structure goes here. It needs to be recursive.
        foreach ($this->lines as $line => $col_array) {
            if ($line == -1) {
                continue;
            }
            foreach ($col_array as $col => $struct) {
                $this->_renderStruct($ret, $struct, $line, $col);
            }
        }
        if (isset($this->lines[-1])) {
            $this->_renderStruct($ret, $this->lines[-1]);
        }

if (empty($errors)) {
 return '' . $this->locale->getMessage('ErrorCollector: No errors') . '';
 } else {
 return '<ul><li>' . implode('</li><li>', $ret) . '</li></ul>';
 }

}

private function _renderStruct(&$ret, $struct, $line = null, $col = null)
 {
 $stack = array($struct);
 $context_stack = array(array());
 while ($current = array_pop($stack)) {
 $context = array_pop($context_stack);
 foreach ($current->errors as $error) {
 list($severity, $msg) = $error;
 $string = '';
 $string .= '<div>';
 // W3C uses an icon to indicate the severity of the error.
 $error = $this->locale->getErrorName($severity);
 $string .= "$error ";
 if (!is_null($line) && !is_null($col)) {
 $string .= "Line $line, Column $col: ";
 } else {
 $string .= 'End of Document: ';
 }
 $string .= '' . $this->generator->escape($msg) . ' ';
 $string .= '</div>';
 // Here, have a marker for the character on the column appropriate.
 // Be sure to clip extremely long lines.
 //$string .= '<pre>';
 //$string .= '';
 //$string .= '</pre>';
 $ret[] = $string;
 }
 foreach ($current->children as $array) {
 $context[] = $current;
 $stack = array_merge($stack, array_reverse($array, true));
 for ($i = count($array); $i > 0; $i--) {
 $context_stack[] = $context;
 }
 }
 }
 }
}

// vim: et sw=4 sts=4