/php/lib/content_object_updater.class.php

<?php

namespace repository;



use admin\AdminDataManager;



use admin\Setting;



use common\libraries\DatabaseBackup;

use common\libraries\Filesystem;

use common\libraries\Translation;

use common\libraries\Path;

use common\libraries\Configuration;

use common\libraries\Utilities;

use common\libraries\EqualityCondition;

use common\libraries\AndCondition;



use user\UserDataManager;

use user\User;



use DomDocument;



abstract class ContentObjectUpdater

{

    const TYPE_NORMAL = '1';

    const TYPE_CONFIRM = '2';

    const TYPE_WARNING = '3';

    const TYPE_ERROR = '4';

    const UPDATE_SUCCESS = 'success';

    const UPDATE_MESSAGE = 'message';



    /**

     * The datamanager which can be used by the installer of the application

     */

    private $data_manager;



    /**

     * Message to be displayed upon completion of the update procedure

     */

    private $message;



    private $type;



    /**

     * Constructor

     */

    function __construct($type)

    {

        $this->data_manager = RepositoryDataManager :: get_instance();

        $this->message = array();

        $this->type = $type;

    }



    function update()

    {

        $dir = $this->get_install_path();

        $files = Filesystem :: get_directory_content($dir, Filesystem :: LIST_FILES);



        foreach ($files as $file)

        {

            if ((substr($file, - 3) == 'xml'))

            {

                if (! $this->storage_unit_exist($file))

                {

                    if (! $this->create_storage_unit($file))

                    {

                        return false;

                    }

                }

                else

                {

                    $storage_unit = self :: parse_xml_file($file);

                    $backup = DatabaseBackup :: factory('mysql', array($storage_unit['name']), $this->get_data_manager());

                    $output = $backup->backup();

                    $file = Path :: get_temp_path() . 'backup/repository_' . $this->get_content_object() . '_' . time() . '.backup';

                    Filesystem :: write_to_file($file, $output, true);

                    $this->add_message(self :: TYPE_WARNING, 'Xml file needed with changes');

                }

            }

        }



        if (! $this->configure_content_object())

        {

            return false;

        }



        if (method_exists($this, 'update_extra'))

        {

            if (! $this->update_extra())

            {

                return false;

            }

        }



        return $this->update_successful();

    }



    public function import_content_object()

    {

        $type = $this->get_content_object();

        $file = Path :: get_repository_path() . 'lib/content_object/' . $type . '/install/example.zip';



        if (file_exists($file))

        {

            $condition = new EqualityCondition(User :: PROPERTY_PLATFORMADMIN, 1);

            $user = UserDataManager :: get_instance()->retrieve_users($condition)->next_result();

            $category = RepositoryDataManager :: get_instance();



            $import = ContentObjectImport :: factory('cpo', array('tmp_name' => $file), $user, 0);

            if (! $import->import_content_object())

            {

                $message = Translation :: get('ContentObjectImportFailed');

                $this->update_failed($message);

                return false;

            }

            else

            {

                $this->add_message(self :: TYPE_NORMAL, Translation :: get('ImportSuccessfull'));

            }

        }

        return true;

    }



    function get_content_object()

    {

        return $this->type;

    }



    function get_content_object_name()

    {

        return Utilities :: underscores_to_camelcase($this->type);

    }



    /**

     * Parses an XML file describing a storage unit.

     * For defining the 'type' of the field, the same definition is used as the

     * PEAR::MDB2 package. See http://pear.php.net/manual/en/package.database.

     * mdb2.datatypes.php

     * @param string $file The complete path to the XML-file from which the

     * storage unit definition should be read.

     * @return array An with values for the keys 'name','properties' and

     * 'indexes'

     */

    public static function parse_xml_file($file)

    {

        $name = '';

        $properties = array();

        $indexes = array();



        $doc = new DOMDocument();

        $doc->load($file);

        $object = $doc->getElementsByTagname('object')->item(0);

        $name = $object->getAttribute('name');

        $xml_properties = $doc->getElementsByTagname('property');

        $attributes = array('type', 'length', 'unsigned', 'notnull', 'default', 'autoincrement', 'fixed');

        foreach ($xml_properties as $index => $property)

        {

            $property_info = array();

            foreach ($attributes as $index => $attribute)

            {

                if ($property->hasAttribute($attribute))

                {

                    $property_info[$attribute] = $property->getAttribute($attribute);

                }

            }

            $properties[$property->getAttribute('name')] = $property_info;

        }

        $xml_indexes = $doc->getElementsByTagname('index');

        foreach ($xml_indexes as $key => $index)

        {

            $index_info = array();

            $index_info['type'] = $index->getAttribute('type');

            $index_properties = $index->getElementsByTagname('indexproperty');

            foreach ($index_properties as $subkey => $index_property)

            {

                $index_info['fields'][$index_property->getAttribute('name')] = array(

                        'length' => $index_property->getAttribute('length'));

            }

            $indexes[$index->getAttribute('name')] = $index_info;

        }

        $result = array();

        $result['name'] = $name;

        $result['properties'] = $properties;

        $result['indexes'] = $indexes;



        return $result;

    }



    function add_message($type = self :: TYPE_NORMAL, $message)

    {

        switch ($type)

        {

            case self :: TYPE_NORMAL :

                $this->message[] = $message;

                break;

            case self :: TYPE_CONFIRM :

                $this->message[] = '<span style="color: green; font-weight: bold;">' . $message . '</span>';

                break;

            case self :: TYPE_WARNING :

                $this->message[] = '<span style="color: orange; font-weight: bold;">' . $message . '</span>';

                break;

            case self :: TYPE_ERROR :

                $this->message[] = '<span style="color: red; font-weight: bold;">' . $message . '</span>';

                break;

            default :

                $this->message[] = $message;

                break;

        }

    }



    function set_message($message)

    {

        $this->message = $message;

    }



    function get_message()

    {

        return $this->message;

    }



    function get_data_manager()

    {

        return $this->data_manager;

    }



    function retrieve_message()

    {

        return implode('<br />' . "\n", $this->get_message());

    }



    /**

     * Parses an XML file and sends the request to the database manager

     * @param String $path

     */

    function create_storage_unit($path)

    { //print_r($path);

        $storage_unit_info = self :: parse_xml_file($path);

        $this->add_message(self :: TYPE_NORMAL, Translation :: get('StorageUnitCreation') . ': <em>' . $storage_unit_info['name'] . '</em>');

        if (! $this->data_manager->create_storage_unit($storage_unit_info['name'], $storage_unit_info['properties'], $storage_unit_info['indexes']))

        {

            return $this->update_failed(Translation :: get('StorageUnitCreationFailed') . ': <em>' . $storage_unit_info['name'] . '</em>');

        }

        else

        {

            return true;

        }

    }



    function parse_content_object_settings($file)

    {

        $doc = new DOMDocument();



        $doc->load($file);

        $object = $doc->getElementsByTagname('application')->item(0);



        // Get events

        $events = $doc->getElementsByTagname('setting');

        $settings = array();



        foreach ($events as $index => $event)

        {

            $settings[$event->getAttribute('name')] = array(

                    'default' => $event->getAttribute('default'),

                    'user_setting' => $event->getAttribute('user_setting'),

                    'type' => $event->getAttribute('type'));

        }



        return $settings;

    }



    function configure_content_object()

    {

        $content_object = $this->get_content_object();

        $namespace = ContentObject :: get_content_object_type_namespace($content_object);

        $settings_file = $this->get_path() . 'settings.xml';



        if (file_exists($settings_file))

        {

            $xml = $this->parse_content_object_settings($settings_file);

            foreach ($xml as $name => $parameters)

            {

                $type = $parameters['type'];

                if ($type == 1)

                {

                    $setting = new Setting();

                    $setting->set_context($namespace);

                    $setting->set_variable($name);

                    $setting->set_value($parameters['default']);



                    $user_setting = $parameters['user_setting'];

                    if ($user_setting)

                        $setting->set_user_setting($user_setting);

                    else

                        $setting->set_user_setting(0);



                    if (! $setting->create())

                    {

                        $message = Translation :: get('ApplicationConfigurationFailed');

                        $this->update_failed($message);

                    }

                }

                else

                {

                    $conditions = array();

                    $conditions[] = new EqualityCondition(Setting :: PROPERTY_CONTEXT, $namespace);

                    $conditions[] = new EqualityCondition(Setting :: PROPERTY_VARIABLE, $name);

                    $condition = new AndCondition($conditions);



                    $settings = AdminDataManager :: get_instance()->retrieve_settings($condition);

                    while ($setting = $settings->next_result())

                    {

                        if (! $setting->delete())

                        {

                            return false;

                        }

                    }

                }

            }

            $this->add_message(self :: TYPE_NORMAL, Translation :: get('SettingsAdded'));

        }



        return true;

    }



    function storage_unit_exist($file)

    {

        $storage_unit_info = self :: parse_xml_file($file);

        $this->add_message(self :: TYPE_NORMAL, Translation :: get('StorageUnitExist') . ': <em>' . $storage_unit_info['name'] . '</em>');

        if (! $this->data_manager->storage_unit_exist($storage_unit_info['name']))

        {

            return false;



     //return $this->update_failed(Translation :: get('StorageUnitCreationFailed') . ': <em>' . $storage_unit_info['name'] . '</em>');

        }

        else

        {

            return true;

        }

    }



    function update_failed($error_message)

    {

        $this->add_message(self :: TYPE_ERROR, $error_message);

        $this->add_message(self :: TYPE_ERROR, Translation :: get('ContentObjectInstallFailed'));

        $this->add_message(self :: TYPE_ERROR, Translation :: get('PlatformInstallFailed'));

        return false;

    }



    function update_successful()

    {

        $this->add_message(self :: TYPE_CONFIRM, Translation :: get('InstallSuccess'));

        return true;

    }



    /**

     * Creates an application-specific installer.

     * @param string $application The application for which we want to start the installer.

     * @param string $values The form values passed on by the wizard.

     */

    static function factory($type, $version)

    {

        $version_string = str_replace('.', '', $version);



        $class = ContentObject :: type_to_class($type) . $version_string . 'ContentObjectUpdater';



        $file = Path :: get_repository_path() . 'lib/content_object/' . $type . '/update/' . $version . '/' . $type . '_' . $version_string . '_updater.class.php';

        if (file_exists($file))

        {

            require_once $file;

            return new $class($type);

        }

        else

        {

            return false;

        }



    }



    abstract function get_path();



    abstract function get_install_path();

}

?>