+++ /dev/null
-<?php
-
-/**
- * Performs validations on HTMLPurifier_ConfigSchema_Interchange
- *
- * @note If you see '// handled by InterchangeBuilder', that means a
- * design decision in that class would prevent this validation from
- * ever being necessary. We have them anyway, however, for
- * redundancy.
- */
-class HTMLPurifier_ConfigSchema_Validator
-{
-
- /**
- * Easy to access global objects.
- */
- protected $interchange, $aliases;
-
- /**
- * Context-stack to provide easy to read error messages.
- */
- protected $context = array();
-
- /**
- * HTMLPurifier_VarParser to test default's type.
- */
- protected $parser;
-
- public function __construct() {
- $this->parser = new HTMLPurifier_VarParser();
- }
-
- /**
- * Validates a fully-formed interchange object. Throws an
- * HTMLPurifier_ConfigSchema_Exception if there's a problem.
- */
- public function validate($interchange) {
- $this->interchange = $interchange;
- $this->aliases = array();
- // PHP is a bit lax with integer <=> string conversions in
- // arrays, so we don't use the identical !== comparison
- foreach ($interchange->directives as $i => $directive) {
- $id = $directive->id->toString();
- if ($i != $id) $this->error(false, "Integrity violation: key '$i' does not match internal id '$id'");
- $this->validateDirective($directive);
- }
- return true;
- }
-
- /**
- * Validates a HTMLPurifier_ConfigSchema_Interchange_Id object.
- */
- public function validateId($id) {
- $id_string = $id->toString();
- $this->context[] = "id '$id_string'";
- if (!$id instanceof HTMLPurifier_ConfigSchema_Interchange_Id) {
- // handled by InterchangeBuilder
- $this->error(false, 'is not an instance of HTMLPurifier_ConfigSchema_Interchange_Id');
- }
- // keys are now unconstrained (we might want to narrow down to A-Za-z0-9.)
- // we probably should check that it has at least one namespace
- $this->with($id, 'key')
- ->assertNotEmpty()
- ->assertIsString(); // implicit assertIsString handled by InterchangeBuilder
- array_pop($this->context);
- }
-
- /**
- * Validates a HTMLPurifier_ConfigSchema_Interchange_Directive object.
- */
- public function validateDirective($d) {
- $id = $d->id->toString();
- $this->context[] = "directive '$id'";
- $this->validateId($d->id);
-
- $this->with($d, 'description')
- ->assertNotEmpty();
-
- // BEGIN - handled by InterchangeBuilder
- $this->with($d, 'type')
- ->assertNotEmpty();
- $this->with($d, 'typeAllowsNull')
- ->assertIsBool();
- try {
- // This also tests validity of $d->type
- $this->parser->parse($d->default, $d->type, $d->typeAllowsNull);
- } catch (HTMLPurifier_VarParserException $e) {
- $this->error('default', 'had error: ' . $e->getMessage());
- }
- // END - handled by InterchangeBuilder
-
- if (!is_null($d->allowed) || !empty($d->valueAliases)) {
- // allowed and valueAliases require that we be dealing with
- // strings, so check for that early.
- $d_int = HTMLPurifier_VarParser::$types[$d->type];
- if (!isset(HTMLPurifier_VarParser::$stringTypes[$d_int])) {
- $this->error('type', 'must be a string type when used with allowed or value aliases');
- }
- }
-
- $this->validateDirectiveAllowed($d);
- $this->validateDirectiveValueAliases($d);
- $this->validateDirectiveAliases($d);
-
- array_pop($this->context);
- }
-
- /**
- * Extra validation if $allowed member variable of
- * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
- */
- public function validateDirectiveAllowed($d) {
- if (is_null($d->allowed)) return;
- $this->with($d, 'allowed')
- ->assertNotEmpty()
- ->assertIsLookup(); // handled by InterchangeBuilder
- if (is_string($d->default) && !isset($d->allowed[$d->default])) {
- $this->error('default', 'must be an allowed value');
- }
- $this->context[] = 'allowed';
- foreach ($d->allowed as $val => $x) {
- if (!is_string($val)) $this->error("value $val", 'must be a string');
- }
- array_pop($this->context);
- }
-
- /**
- * Extra validation if $valueAliases member variable of
- * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
- */
- public function validateDirectiveValueAliases($d) {
- if (is_null($d->valueAliases)) return;
- $this->with($d, 'valueAliases')
- ->assertIsArray(); // handled by InterchangeBuilder
- $this->context[] = 'valueAliases';
- foreach ($d->valueAliases as $alias => $real) {
- if (!is_string($alias)) $this->error("alias $alias", 'must be a string');
- if (!is_string($real)) $this->error("alias target $real from alias '$alias'", 'must be a string');
- if ($alias === $real) {
- $this->error("alias '$alias'", "must not be an alias to itself");
- }
- }
- if (!is_null($d->allowed)) {
- foreach ($d->valueAliases as $alias => $real) {
- if (isset($d->allowed[$alias])) {
- $this->error("alias '$alias'", 'must not be an allowed value');
- } elseif (!isset($d->allowed[$real])) {
- $this->error("alias '$alias'", 'must be an alias to an allowed value');
- }
- }
- }
- array_pop($this->context);
- }
-
- /**
- * Extra validation if $aliases member variable of
- * HTMLPurifier_ConfigSchema_Interchange_Directive is defined.
- */
- public function validateDirectiveAliases($d) {
- $this->with($d, 'aliases')
- ->assertIsArray(); // handled by InterchangeBuilder
- $this->context[] = 'aliases';
- foreach ($d->aliases as $alias) {
- $this->validateId($alias);
- $s = $alias->toString();
- if (isset($this->interchange->directives[$s])) {
- $this->error("alias '$s'", 'collides with another directive');
- }
- if (isset($this->aliases[$s])) {
- $other_directive = $this->aliases[$s];
- $this->error("alias '$s'", "collides with alias for directive '$other_directive'");
- }
- $this->aliases[$s] = $d->id->toString();
- }
- array_pop($this->context);
- }
-
- // protected helper functions
-
- /**
- * Convenience function for generating HTMLPurifier_ConfigSchema_ValidatorAtom
- * for validating simple member variables of objects.
- */
- protected function with($obj, $member) {
- return new HTMLPurifier_ConfigSchema_ValidatorAtom($this->getFormattedContext(), $obj, $member);
- }
-
- /**
- * Emits an error, providing helpful context.
- */
- protected function error($target, $msg) {
- if ($target !== false) $prefix = ucfirst($target) . ' in ' . $this->getFormattedContext();
- else $prefix = ucfirst($this->getFormattedContext());
- throw new HTMLPurifier_ConfigSchema_Exception(trim($prefix . ' ' . $msg));
- }
-
- /**
- * Returns a formatted context string.
- */
- protected function getFormattedContext() {
- return implode(' in ', array_reverse($this->context));
- }
-
-}
-
-// vim: et sw=4 sts=4
projects / friendica.git / blobdiff