<?php
class HTMLPurifier_ConfigSchema_InterchangeBuilder
{
/**
* Used for processing DEFAULT, nothing else.
* @type HTMLPurifier_VarParser
*/
protected $varParser;
/**
* @param HTMLPurifier_VarParser $varParser
*/
public function __construct($varParser = null)
{
$this->varParser = $varParser ? $varParser : new HTMLPurifier_VarParser_Native();
}
/**
* @param string $dir
* @return HTMLPurifier_ConfigSchema_Interchange
*/
public static function buildFromDirectory($dir = null)
{
$builder = new HTMLPurifier_ConfigSchema_InterchangeBuilder();
$interchange = new HTMLPurifier_ConfigSchema_Interchange();
return $builder->buildDir($interchange, $dir);
}
/**
* @param HTMLPurifier_ConfigSchema_Interchange $interchange
* @param string $dir
* @return HTMLPurifier_ConfigSchema_Interchange
*/
public function buildDir($interchange, $dir = null)
{
if (!$dir) {
$dir = HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema';
}
if (file_exists($dir . '/info.ini')) {
$info = parse_ini_file($dir . '/info.ini');
$interchange->name = $info['name'];
}
$files = array();
$dh = opendir($dir);
while (false !== ($file = readdir($dh))) {
if (!$file || $file[0] == '.' || strrchr($file, '.') !== '.txt') {
continue;
}
$files[] = $file;
}
closedir($dh);
sort($files);
foreach ($files as $file) {
$this->buildFile($interchange, $dir . '/' . $file);
}
return $interchange;
}
/**
* @param HTMLPurifier_ConfigSchema_Interchange $interchange
* @param string $file
*/
public function buildFile($interchange, $file)
{
$parser = new HTMLPurifier_StringHashParser();
$this->build(
$interchange,
new HTMLPurifier_StringHash($parser->parseFile($file))
);
}
/**
* Builds an interchange object based on a hash.
* @param HTMLPurifier_ConfigSchema_Interchange $interchange HTMLPurifier_ConfigSchema_Interchange object to build
* @param HTMLPurifier_StringHash $hash source data
* @throws HTMLPurifier_ConfigSchema_Exception
*/
public function build($interchange, $hash)
{
if (!$hash instanceof HTMLPurifier_StringHash) {
$hash = new HTMLPurifier_StringHash($hash);
}
if (!isset($hash['ID'])) {
throw new HTMLPurifier_ConfigSchema_Exception('Hash does not have any ID');
}
if (strpos($hash['ID'], '.') === false) {
if (count($hash) == 2 && isset($hash['DESCRIPTION'])) {
$hash->offsetGet('DESCRIPTION'); // prevent complaining
} else {
throw new HTMLPurifier_ConfigSchema_Exception('All directives must have a namespace');
}
} else {
$this->buildDirective($interchange, $hash);
}
$this->_findUnused($hash);
}
/**
* @param HTMLPurifier_ConfigSchema_Interchange $interchange
* @param HTMLPurifier_StringHash $hash
* @throws HTMLPurifier_ConfigSchema_Exception
*/
public function buildDirective($interchange, $hash)
{
$directive = new HTMLPurifier_ConfigSchema_Interchange_Directive();
// These are required elements:
$directive->id = $this->id($hash->offsetGet('ID'));
$id = $directive->id->toString(); // convenience
if (isset($hash['TYPE'])) {
$type = explode('/', $hash->offsetGet('TYPE'));
if (isset($type[1])) {
$directive->typeAllowsNull = true;
}
$directive->type = $type[0];
} else {
throw new HTMLPurifier_ConfigSchema_Exception("TYPE in directive hash '$id' not defined");
}
if (isset($hash['DEFAULT'])) {
try {
$directive->default = $this->varParser->parse(
$hash->offsetGet('DEFAULT'),
$directive->type,
$directive->typeAllowsNull
);
} catch (HTMLPurifier_VarParserException $e) {
throw new HTMLPurifier_ConfigSchema_Exception($e->getMessage() . " in DEFAULT in directive hash '$id'");
}
}
if (isset($hash['DESCRIPTION'])) {
$directive->description = $hash->offsetGet('DESCRIPTION');
}
if (isset($hash['ALLOWED'])) {
$directive->allowed = $this->lookup($this->evalArray($hash->offsetGet('ALLOWED')));
}
if (isset($hash['VALUE-ALIASES'])) {
$directive->valueAliases = $this->evalArray($hash->offsetGet('VALUE-ALIASES'));
}
if (isset($hash['ALIASES'])) {
$raw_aliases = trim($hash->offsetGet('ALIASES'));
$aliases = preg_split('/\s*,\s*/', $raw_aliases);
foreach ($aliases as $alias) {
$directive->aliases[] = $this->id($alias);
}
}
if (isset($hash['VERSION'])) {
$directive->version = $hash->offsetGet('VERSION');
}
if (isset($hash['DEPRECATED-USE'])) {
$directive->deprecatedUse = $this->id($hash->offsetGet('DEPRECATED-USE'));
}
if (isset($hash['DEPRECATED-VERSION'])) {
$directive->deprecatedVersion = $hash->offsetGet('DEPRECATED-VERSION');
}
if (isset($hash['EXTERNAL'])) {
$directive->external = preg_split('/\s*,\s*/', trim($hash->offsetGet('EXTERNAL')));
}
$interchange->addDirective($directive);
}
/**
* Evaluates an array PHP code string without array() wrapper
* @param string $contents
*/
protected function evalArray($contents)
{
return eval('return array(' . $contents . ');');
}
/**
* Converts an array list into a lookup array.
* @param array $array
* @return array
*/
protected function lookup($array)
{
$ret = array();
foreach ($array as $val) {
$ret[$val] = true;
}
return $ret;
}
/**
* Convenience function that creates an HTMLPurifier_ConfigSchema_Interchange_Id
* object based on a string Id.
* @param string $id
* @return HTMLPurifier_ConfigSchema_Interchange_Id
*/
protected function id($id)
{
return HTMLPurifier_ConfigSchema_Interchange_Id::make($id);
}
/**
* Triggers errors for any unused keys passed in the hash; such keys
* may indicate typos, missing values, etc.
* @param HTMLPurifier_StringHash $hash Hash to check.
*/
protected function _findUnused($hash)
{
$accessed = $hash->getAccessed();
foreach ($hash as $k => $v) {
if (!isset($accessed[$k])) {
trigger_error("String hash key '$k' not used by builder", E_USER_NOTICE);
}
}
}
}
// vim: et sw=4 sts=4