message.php

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            if (count($parts) == 2) {
                list($prefix, $rest) = $parts;
            } else {
                $prefix = null;
            }

            if ($prefix != 'openid') {
                $obj->args->set(array(Auth_OpenID_BARE_NS, $key), $value);
            } else {
                $openid_args[$rest] = $value;
            }
        }

        if ($obj->_fromOpenIDArgs($openid_args)) {
            return $obj;
        } else {
            return null;
        }
    }

    function fromOpenIDArgs($openid_args)
    {
        // Takes an array.

        // Construct a Message from a parsed KVForm message
        $obj = new Auth_OpenID_Message();
        if ($obj->_fromOpenIDArgs($openid_args)) {
            return $obj;
        } else {
            return null;
        }
    }

    /**
     * @access private
     */
    function _fromOpenIDArgs($openid_args)
    {
        global $Auth_OpenID_registered_aliases;

        // Takes an Auth_OpenID_Mapping instance OR an array.

        if (!Auth_OpenID_Mapping::isA($openid_args)) {
            $openid_args = new Auth_OpenID_Mapping($openid_args);
        }

        $ns_args = array();

        // Resolve namespaces
        foreach ($openid_args->items() as $pair) {
            list($rest, $value) = $pair;

            $parts = explode('.', $rest, 2);

            if (count($parts) == 2) {
                list($ns_alias, $ns_key) = $parts;
            } else {
                $ns_alias = Auth_OpenID_NULL_NAMESPACE;
                $ns_key = $rest;
            }

            if ($ns_alias == 'ns') {
                if ($this->namespaces->addAlias($value, $ns_key) === null) {
                    return false;
                }
            } else if (($ns_alias == Auth_OpenID_NULL_NAMESPACE) &&
                       ($ns_key == 'ns')) {
                // null namespace
                if ($this->setOpenIDNamespace($value, false) === false) {
                    return false;
                }
            } else {
                $ns_args[] = array($ns_alias, $ns_key, $value);
            }
        }

        if (!$this->getOpenIDNamespace()) {
            if ($this->setOpenIDNamespace(Auth_OpenID_OPENID1_NS, true) ===
                false) {
                return false;
            }
        }

        // Actually put the pairs into the appropriate namespaces
        foreach ($ns_args as $triple) {
            list($ns_alias, $ns_key, $value) = $triple;
            $ns_uri = $this->namespaces->getNamespaceURI($ns_alias);
            if ($ns_uri === null) {
                $ns_uri = $this->_getDefaultNamespace($ns_alias);
                if ($ns_uri === null) {

                    $ns_uri = Auth_OpenID_OPENID_NS;
                    $ns_key = sprintf('%s.%s', $ns_alias, $ns_key);
                } else {
                    $this->namespaces->addAlias($ns_uri, $ns_alias, true);
                }
            }

            $this->setArg($ns_uri, $ns_key, $value);
        }

        return true;
    }

    function _getDefaultNamespace($mystery_alias)
    {
        global $Auth_OpenID_registered_aliases;
        if ($this->isOpenID1()) {
            return @$Auth_OpenID_registered_aliases[$mystery_alias];
        }
        return null;
    }

    function setOpenIDNamespace($openid_ns_uri, $implicit)
    {
        if (!in_array($openid_ns_uri, $this->allowed_openid_namespaces)) {
            Auth_OpenID::log('Invalid null namespace: "%s"', $openid_ns_uri);
            return false;
        }

        $succeeded = $this->namespaces->addAlias($openid_ns_uri,
                                                 Auth_OpenID_NULL_NAMESPACE,
                                                 $implicit);
        if ($succeeded === false) {
            return false;
        }

        $this->_openid_ns_uri = $openid_ns_uri;

        return true;
    }

    function getOpenIDNamespace()
    {
        return $this->_openid_ns_uri;
    }

    function fromKVForm($kvform_string)
    {
        // Create a Message from a KVForm string
        return Auth_OpenID_Message::fromOpenIDArgs(
                     Auth_OpenID_KVForm::toArray($kvform_string));
    }

    function copy()
    {
        return $this;
    }

    function toPostArgs()
    {
        // Return all arguments with openid. in front of namespaced
        // arguments.

        $args = array();

        // Add namespace definitions to the output
        foreach ($this->namespaces->iteritems() as $pair) {
            list($ns_uri, $alias) = $pair;
            if ($this->namespaces->isImplicit($ns_uri)) {
                continue;
            }
            if ($alias == Auth_OpenID_NULL_NAMESPACE) {
                $ns_key = 'openid.ns';
            } else {
                $ns_key = 'openid.ns.' . $alias;
            }
            $args[$ns_key] = $ns_uri;
        }

        foreach ($this->args->items() as $pair) {
            list($ns_parts, $value) = $pair;
            list($ns_uri, $ns_key) = $ns_parts;
            $key = $this->getKey($ns_uri, $ns_key);
            $args[$key] = $value;
        }

        return $args;
    }

    function toArgs()
    {
        // Return all namespaced arguments, failing if any
        // non-namespaced arguments exist.
        $post_args = $this->toPostArgs();
        $kvargs = array();
        foreach ($post_args as $k => $v) {
            if (strpos($k, 'openid.') !== 0) {
                // raise ValueError(
                //   'This message can only be encoded as a POST, because it '
                //   'contains arguments that are not prefixed with "openid."')
                return null;
            } else {
                $kvargs[substr($k, 7)] = $v;
            }
        }

        return $kvargs;
    }

    function toFormMarkup($action_url, $form_tag_attrs = null,
                          $submit_text = "Continue")
    {
        $form = "<form accept-charset=\"UTF-8\" ".
            "enctype=\"application/x-www-form-urlencoded\"";

        if (!$form_tag_attrs) {
            $form_tag_attrs = array();
        }

        $form_tag_attrs['action'] = $action_url;
        $form_tag_attrs['method'] = 'post';

        unset($form_tag_attrs['enctype']);
        unset($form_tag_attrs['accept-charset']);

        if ($form_tag_attrs) {
            foreach ($form_tag_attrs as $name => $attr) {
                $form .= sprintf(" %s=\"%s\"", $name, $attr);
            }
        }

        $form .= ">\n";

        foreach ($this->toPostArgs() as $name => $value) {
            $form .= sprintf(
                        "<input type=\"hidden\" name=\"%s\" value=\"%s\" />\n",
                        $name, $value);
        }

        $form .= sprintf("<input type=\"submit\" value=\"%s\" />\n",
                         $submit_text);

        $form .= "</form>\n";

        return $form;
    }

    function toURL($base_url)
    {
        // Generate a GET URL with the parameters in this message
        // attached as query parameters.
        return Auth_OpenID::appendArgs($base_url, $this->toPostArgs());
    }

    function toKVForm()
    {
        // Generate a KVForm string that contains the parameters in
        // this message. This will fail if the message contains
        // arguments outside of the 'openid.' prefix.
        return Auth_OpenID_KVForm::fromArray($this->toArgs());
    }

    function toURLEncoded()
    {
        // Generate an x-www-urlencoded string
        $args = array();

        foreach ($this->toPostArgs() as $k => $v) {
            $args[] = array($k, $v);
        }

        sort($args);
        return Auth_OpenID::httpBuildQuery($args);
    }

    /**
     * @access private
     */
    function _fixNS($namespace)
    {
        // Convert an input value into the internally used values of
        // this object

        if ($namespace == Auth_OpenID_OPENID_NS) {
            if ($this->_openid_ns_uri === null) {
                return new Auth_OpenID_FailureResponse(null,
                    'OpenID namespace not set');
            } else {
                $namespace = $this->_openid_ns_uri;
            }
        }

        if (($namespace != Auth_OpenID_BARE_NS) &&
              (!is_string($namespace))) {
            //TypeError
            $err_msg = sprintf("Namespace must be Auth_OpenID_BARE_NS, ".
                              "Auth_OpenID_OPENID_NS or a string. got %s",
                              print_r($namespace, true));
            return new Auth_OpenID_FailureResponse(null, $err_msg);
        }

        if (($namespace != Auth_OpenID_BARE_NS) &&
            (strpos($namespace, ':') === false)) {
            // fmt = 'OpenID 2.0 namespace identifiers SHOULD be URIs. Got %r'
            // warnings.warn(fmt % (namespace,), DeprecationWarning)

            if ($namespace == 'sreg') {
                // fmt = 'Using %r instead of "sreg" as namespace'
                // warnings.warn(fmt % (SREG_URI,), DeprecationWarning,)
                return Auth_OpenID_SREG_URI;
            }
        }

        return $namespace;
    }

    function hasKey($namespace, $ns_key)
    {
        $namespace = $this->_fixNS($namespace);
        if (Auth_OpenID::isFailure($namespace)) {
            // XXX log me
            return false;
        } else {
            return $this->args->contains(array($namespace, $ns_key));
        }
    }

    function getKey($namespace, $ns_key)
    {
        // Get the key for a particular namespaced argument
        $namespace = $this->_fixNS($namespace);
        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        }
        if ($namespace == Auth_OpenID_BARE_NS) {
            return $ns_key;
        }

        $ns_alias = $this->namespaces->getAlias($namespace);

        // No alias is defined, so no key can exist
        if ($ns_alias === null) {
            return null;
        }

        if ($ns_alias == Auth_OpenID_NULL_NAMESPACE) {
            $tail = $ns_key;
        } else {
            $tail = sprintf('%s.%s', $ns_alias, $ns_key);
        }

        return 'openid.' . $tail;
    }

    function getArg($namespace, $key, $default = null)
    {
        // Get a value for a namespaced key.
        $namespace = $this->_fixNS($namespace);

        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        } else {
            if ((!$this->args->contains(array($namespace, $key))) &&
              ($default == Auth_OpenID_NO_DEFAULT)) {
                $err_msg = sprintf("Namespace %s missing required field %s",
                                   $namespace, $key);
                return new Auth_OpenID_FailureResponse(null, $err_msg);
            } else {
                return $this->args->get(array($namespace, $key), $default);
            }
        }
    }

    function getArgs($namespace)
    {
        // Get the arguments that are defined for this namespace URI

        $namespace = $this->_fixNS($namespace);
        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        } else {
            $stuff = array();
            foreach ($this->args->items() as $pair) {
                list($key, $value) = $pair;
                list($pair_ns, $ns_key) = $key;
                if ($pair_ns == $namespace) {
                    $stuff[$ns_key] = $value;
                }
            }

            return $stuff;
        }
    }

    function updateArgs($namespace, $updates)
    {
        // Set multiple key/value pairs in one call

        $namespace = $this->_fixNS($namespace);

        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        } else {
            foreach ($updates as $k => $v) {
                $this->setArg($namespace, $k, $v);
            }
            return true;
        }
    }

    function setArg($namespace, $key, $value)
    {
        // Set a single argument in this namespace
        $namespace = $this->_fixNS($namespace);

        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        } else {
            $this->args->set(array($namespace, $key), $value);
            if ($namespace !== Auth_OpenID_BARE_NS) {
                $this->namespaces->add($namespace);
            }
            return true;
        }
    }

    function delArg($namespace, $key)
    {
        $namespace = $this->_fixNS($namespace);

        if (Auth_OpenID::isFailure($namespace)) {
            return $namespace;
        } else {
            return $this->args->del(array($namespace, $key));
        }
    }

    function getAliasedArg($aliased_key, $default = null)
    {
        $parts = explode('.', $aliased_key, 2);

        if (count($parts) != 2) {
            $ns = null;
        } else {
            list($alias, $key) = $parts;

            if ($alias == 'ns') {
              // Return the namespace URI for a namespace alias
              // parameter.
              return $this->namespaces->getNamespaceURI($key);
            } else {
              $ns = $this->namespaces->getNamespaceURI($alias);
            }
        }

        if ($ns === null) {
            $key = $aliased_key;
            $ns = $this->getOpenIDNamespace();
        }

        return $this->getArg($ns, $key, $default);
    }
}

?>