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https://github.com/ezyang/htmlpurifier.git
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7e59923029
git-svn-id: http://htmlpurifier.org/svnroot/htmlpurifier/trunk@1629 48356398-32a2-884e-a903-53898d9a118a
112 lines
4.1 KiB
PHP
112 lines
4.1 KiB
PHP
<?php
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/**
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* Performs validations on HTMLPurifier_ConfigSchema_Interchange
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*
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* @note If you see '// handled by InterchangeBuilder', that means a
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* design decision in that class would prevent this validation from
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* ever being necessary. We have them anyway, however, for
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* redundancy.
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*/
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class HTMLPurifier_ConfigSchema_Validator
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{
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protected $interchange;
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/**
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* Context-stack to provide easy to read error messages.
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*/
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protected $context = array();
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/**
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* HTMLPurifier_VarParser to test variable types.
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*/
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protected $parser;
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public function __construct() {
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$this->parser = new HTMLPurifier_VarParser();
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}
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/**
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* Validates a fully-formed interchange object. Throws an
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* HTMLPurifier_ConfigSchema_Exception if there's a problem.
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*/
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public function validate($interchange) {
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$this->interchange = $interchange;
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// PHP is a bit lax with integer <=> string conversions in
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// arrays, so we don't use the identical !== comparison
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foreach ($interchange->namespaces as $i => $namespace) {
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if ($i != $namespace->namespace) $this->error(false, "Integrity violation: key '$i' does not match internal id '{$namespace->namespace}'");
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$this->validateNamespace($namespace);
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}
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foreach ($interchange->directives as $i => $directive) {
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$id = $directive->id->toString();
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if ($i != $id) $this->error(false, "Integrity violation: key '$i' does not match internal id '$id'");
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$this->validateDirective($directive);
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}
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}
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public function validateNamespace($n) {
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$this->context[] = "namespace '{$n->namespace}'";
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$this->with($n, 'namespace')
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->assertNotEmpty()
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->assertAlnum(); // implicit assertIsString handled by InterchangeBuilder
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$this->with($n, 'description')
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->assertNotEmpty()
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->assertIsString(); // handled by InterchangeBuilder
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array_pop($this->context);
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}
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public function validateId($id) {
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$id_string = $id->toString();
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$this->context[] = "id '$id_string'";
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if (!$id instanceof HTMLPurifier_ConfigSchema_Interchange_Id) {
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// handled by InterchangeBuilder
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$this->error(false, 'is not an instance of HTMLPurifier_ConfigSchema_Interchange_Id');
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}
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if (!isset($this->interchange->namespaces[$id->namespace])) {
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$this->error('namespace', 'does not exist'); // assumes that the namespace was validated already
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}
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$this->with($id, 'directive')
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->assertNotEmpty()
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->assertAlnum(); // implicit assertIsString handled by InterchangeBuilder
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array_pop($this->context);
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}
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public function validateDirective($d) {
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$id = $d->id->toString();
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$this->context[] = "directive '$id'";
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$this->validateId($d->id);
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$this->with($d, 'description')
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->assertNotEmpty();
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$this->with($d, 'type')
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->assertNotEmpty(); // handled by InterchangeBuilder
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// Much stricter default check, since we're using the base implementation.
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// handled by InterchangeBuilder
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try {
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$this->parser->parse($d->default, $d->type, $d->typeAllowsNull);
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} catch (HTMLPurifier_VarParserException $e) {
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$this->error('default', 'had error: ' . $e->getMessage());
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}
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array_pop($this->context);
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}
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// protected helper functions
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protected function with($obj, $member) {
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return new HTMLPurifier_ConfigSchema_ValidatorAtom($this->getFormattedContext(), $obj, $member);
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}
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protected function error($target, $msg) {
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if ($target !== false) $prefix = ucfirst($target) . ' in ' . $this->getFormattedContext();
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else $prefix = ucfirst($this->getFormattedContext());
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throw new HTMLPurifier_ConfigSchema_Exception(trim($prefix . ' ' . $msg));
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}
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protected function getFormattedContext() {
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return implode(' in ', array_reverse($this->context));
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}
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}
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