library/HTMLPurifier/ConfigSchema.php

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<?php

class HTMLPurifier_ConfigSchema {
    
    public $defaults = array();
    
    public $info = array();
    
    static protected $singleton;
    
    public static function makeFromSerial() {
        return unserialize(file_get_contents(HTMLPURIFIER_PREFIX . '/HTMLPurifier/ConfigSchema/schema.ser'));
    }
    
    public static function instance($prototype = null) {
        if ($prototype !== null) {
            HTMLPurifier_ConfigSchema::$singleton = $prototype;
        } elseif (HTMLPurifier_ConfigSchema::$singleton === null || $prototype === true) {
            HTMLPurifier_ConfigSchema::$singleton = HTMLPurifier_ConfigSchema::makeFromSerial();
        }
        return HTMLPurifier_ConfigSchema::$singleton;
    }
    
    public function add($namespace, $name, $default, $type, $allow_null) {
        $obj = new stdclass();
        $obj->type = is_int($type) ? $type : HTMLPurifier_VarParser::$types[$type];
        if ($allow_null) $obj->allow_null = true;
        $this->info[$namespace][$name] = $obj;
        $this->defaults[$namespace][$name] = $default;
    }
    
    public function addNamespace($namespace) {
        $this->info[$namespace] = array();
        $this->defaults[$namespace] = array();
    }
    
    public function addValueAliases($namespace, $name, $aliases) {
        if (!isset($this->info[$namespace][$name]->aliases)) {
            $this->info[$namespace][$name]->aliases = array();
        }
        foreach ($aliases as $alias => $real) {
            $this->info[$namespace][$name]->aliases[$alias] = $real;
        }
    }
    
    public function addAllowedValues($namespace, $name, $allowed) {
        $this->info[$namespace][$name]->allowed = $allowed;
    }
    
    public function addAlias($namespace, $name, $new_namespace, $new_name) {
        $obj = new stdclass;
        $obj->namespace = $new_namespace;
        $obj->name = $new_name;
        $obj->isAlias = true;
        $this->info[$namespace][$name] = $obj;
    }
    
    public function postProcess() {
        foreach ($this->info as $namespace => $info) {
            foreach ($info as $directive => $v) {
                if (count((array) $v) == 1) {
                    $this->info[$namespace][$directive] = $v->type;
                } elseif (count((array) $v) == 2 && isset($v->allow_null)) {
                    $this->info[$namespace][$directive] = -$v->type;
                }
            }
        }
    }
    
    // DEPRECATED METHODS
    
    public static function define($namespace, $name, $default, $type, $description) {
        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
        $type_values = explode('/', $type, 2);
        $type = $type_values[0];
        $modifier = isset($type_values[1]) ? $type_values[1] : false;
        $allow_null = ($modifier === 'null');
        $def = HTMLPurifier_ConfigSchema::instance();
        $def->add($namespace, $name, $default, $type, $allow_null);
    }
    
    public static function defineNamespace($namespace, $description) {
        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
        $def = HTMLPurifier_ConfigSchema::instance();
        $def->addNamespace($namespace);
    }
    
    public static function defineValueAliases($namespace, $name, $aliases) {
        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
        $def = HTMLPurifier_ConfigSchema::instance();
        $def->addValueAliases($namespace, $name, $aliases);
    }
    
    public static function defineAllowedValues($namespace, $name, $allowed_values) {
        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
        $allowed = array();
        foreach ($allowed_values as $value) {
            $allowed[$value] = true;
        }
        $def = HTMLPurifier_ConfigSchema::instance();
        $def->addAllowedValues($namespace, $name, $allowed);
    }
    
    public static function defineAlias($namespace, $name, $new_namespace, $new_name) {
        HTMLPurifier_ConfigSchema::deprecated(__METHOD__);
        $def = HTMLPurifier_ConfigSchema::instance();
        $def->addAlias($namespace, $name, $new_namespace, $new_name);
    }
    
    public function validate($a, $b, $c = false) {
        trigger_error("HTMLPurifier_ConfigSchema->validate deprecated, use HTMLPurifier_VarParser->parse instead", E_USER_NOTICE);
        $parser = new HTMLPurifier_VarParser();
        return $parser->parse($a, $b, $c);
    }
    
    private static function deprecated($method) {
        trigger_error("Static HTMLPurifier_ConfigSchema::$method deprecated, use add*() method instead", E_USER_NOTICE);
    }
    
}

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