class.ilForumXMLParser.php

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<?php

declare(strict_types=1);

class ilForumXMLParser extends ilSaxParser
{
    public static array $style_map = [];

    private string $entity = '';
    private array $mapping = [
        'frm' => [],
        'thr' => [],
        'pos' => []
    ];
    private readonly ilDBInterface $db;
    private readonly ilObjUser $aobject;
    private $import_install_id;
    private ?string $importDirectory = null;
    private ?string $schema_version = null;
    private string $cdata = '';

    private ?ilForumTopic $forumThread = null;
    private ?ilForumPost $forumPost = null;
    private ?int $forum_obj_id = null;
    private ?int $frm_last_mapped_top_usr_id = null;
    private ?int $lastHandledForumId = null;
    private ?int $lastHandledThreadId = null;
    private ?int $lastHandledPostId = null;
    private ?int $last_handled_style_id = null;
    private array $forumArray = [];
    private array $postArray = [];
    private array $threadArray = [];
    private array $contentArray = [
        'content' => ''
    ];
    private array $user_id_mapping = [];
    private array $mediaObjects = [];

    protected \ILIAS\Style\Content\DomainService $content_style_domain;

    public function __construct(
        private readonly ilObjForum $forum,
        string $a_xml_data,
        private readonly ilImportMapping $importMapping
    ) {
        global $DIC;

        $this->db = $DIC->database();
        $this->aobject = new ilObjUser(ANONYMOUS_USER_ID);

        parent::__construct();

        $this->content_style_domain = $DIC
            ->contentStyle()
            ->domain();

        $this->setXMLContent('<?xml version="1.0" encoding="utf-8"?>' . $a_xml_data);
    }

    public function setImportDirectory(?string $a_val): void
    {
        $this->importDirectory = $a_val;
    }

    public function getImportDirectory(): ?string
    {
        return $this->importDirectory;
    }

    public function getSchemaVersion(): ?string
    {
        return $this->schema_version;
    }

    public function setSchemaVersion(?string $schema_version): void
    {
        $this->schema_version = $schema_version;
    }

    public function setHandlers($a_xml_parser): void
    {
        xml_set_element_handler(
            $a_xml_parser,
            function (XMLParser $a_xml_parser, string $a_name, array $a_attribs): void {
                $this->handlerBeginTag($a_xml_parser, $a_name, $a_attribs);
            },
            function (XMLParser $a_xml_parser, string $a_name): void {
                $this->handlerEndTag($a_xml_parser, $a_name);
            }
        );
        xml_set_character_data_handler($a_xml_parser, function (XMLParser $a_xml_parser, string $a_data): void {
            $this->handlerCharacterData($a_xml_parser, $a_data);
        });
    }

    public function handlerBeginTag(XMLParser $a_xml_parser, string $a_name, array $a_attribs): void
    {
        switch ($a_name) {
            case 'Forum':
                $this->entity = 'forum';
                $this->forumArray = [];
                break;

            case 'Thread':
                $this->entity = 'thread';
                $this->threadArray = [];
                break;

            case 'Post':
                $this->entity = 'post';
                $this->postArray = [];
                $this->mediaObjects = [];
                break;

            case 'Content':
                $this->entity = 'content';
                $this->contentArray = [
                    'content' => ''
                ];
                break;

            case 'MediaObject':
                $this->mediaObjects[] = $a_attribs;
                break;
        }

        if (isset($a_attribs['Style'])) {
            $this->last_handled_style_id = (int) $a_attribs['Style'];
        }
    }

    public function handlerEndTag(XMLParser $a_xml_parser, string $a_name): void
    {
        $this->cdata = trim($this->cdata);
        $property = strtolower($this->entity) . 'Array';

        if (!property_exists($this, $property)) {
            return;
        }

        $propertyValue = &$this->{$property};

        switch ($a_name) {
            case 'Forum':
                $query_num_posts = 'SELECT COUNT(pos_pk) cnt FROM frm_posts WHERE pos_top_fk = ' . $this->db->quote(
                    $this->lastHandledForumId,
                    'integer'
                );
                $res_pos = $this->db->query($query_num_posts);
                $data_pos = $this->db->fetchAssoc($res_pos);
                $num_posts = (int) $data_pos['cnt'];

                $query_num_threads = 'SELECT COUNT(thr_pk) cnt FROM frm_threads WHERE thr_top_fk = ' . $this->db->quote(
                    $this->lastHandledForumId,
                    'integer'
                );
                $res_thr = $this->db->query($query_num_threads);
                $data_thr = $this->db->fetchAssoc($res_thr);
                $num_threads = (int) $data_thr['cnt'];

                $update_str = null;
                if ($this->lastHandledPostId !== 0) {
                    $update_str = implode('#', [
                        (string) $this->lastHandledForumId,
                        (string) $this->lastHandledThreadId,
                        (string) $this->lastHandledPostId
                    ]);
                }

                $this->db->manipulateF(
                    'UPDATE frm_data 
                        SET top_last_post = %s,
                            top_num_posts = %s,
                            top_num_threads = %s,
                            top_usr_id = %s
                    WHERE top_frm_fk = %s',
                    ['text', 'integer', 'integer', 'integer', 'integer'],
                    [$update_str, $num_posts, $num_threads, $this->frm_last_mapped_top_usr_id, $this->forum_obj_id]
                );

                ilLPStatusWrapper::_refreshStatus($this->forum->getId());
                break;

            case 'Id':
                $propertyValue['Id'] = $this->cdata;
                break;

            case 'ObjId':
                $propertyValue['ObjId'] = $this->cdata;
                break;

            case 'Title':
                $propertyValue['Title'] = $this->cdata;
                break;

            case 'Description':
                $propertyValue['Description'] = $this->cdata;
                break;

            case 'DefaultView':
                $propertyValue['DefaultView'] = $this->cdata;
                break;

            case 'Pseudonyms':
                $propertyValue['Pseudonyms'] = $this->cdata;
                break;

            case 'Statistics':
                $propertyValue['Statistics'] = $this->cdata;
                break;

            case 'ThreadRatings':
                $propertyValue['ThreadRatings'] = $this->cdata;
                break;

            case 'PostingActivation':
                $propertyValue['PostingActivation'] = $this->cdata;
                break;

            case 'PresetSubject':
                $propertyValue['PresetSubject'] = $this->cdata;
                break;

            case 'PresetRe':
                $propertyValue['PresetRe'] = $this->cdata;
                break;

            case 'NotificationType':
                $propertyValue['NotificationType'] = $this->cdata;
                break;

            case 'NotificationEvents':
                $propertyValue['NotificationEvents'] = $this->cdata;
                break;

            case 'ForceNotification':
                $propertyValue['ForceNotification'] = $this->cdata;
                break;

            case 'ToggleNotification':
                $propertyValue['ToggleNotification'] = $this->cdata;
                break;

            case 'LastPost':
                $propertyValue['LastPost'] = $this->cdata;
                break;

            case 'Moderator':
                $propertyValue['Moderator'] = $this->cdata;
                break;

            case 'CreateDate':
                $propertyValue['CreateDate'] = $this->cdata;
                break;

            case 'UpdateDate':
                $propertyValue['UpdateDate'] = $this->cdata;
                break;

            case 'FileUpload':
                $propertyValue['FileUpload'] = $this->cdata;
                break;

            case 'UpdateUserId':
                $propertyValue['UpdateUserId'] = $this->cdata;
                break;

            case 'AuthorId':
                $propertyValue['AuthorId'] = $this->cdata;
                break;
            case 'isAuthorModerator':
                $propertyValue['isAuthorModerator'] = $this->cdata;
                break;

            case 'UserId':
                $propertyValue['UserId'] = $this->cdata;
                if ($this->entity === 'forum' && $this->forumArray !== []) {
                    // createSettings accesses superglobal $_GET  array, which can cause problems
                    // with public_notifications of block settings
                    $this->forum->createSettings();

                    $forum_array = $this->getUserIdAndAlias(
                        (int) ($this->forumArray['UserId'] ?? 0),
                        ''
                    );
                    $this->frm_last_mapped_top_usr_id = $forum_array['usr_id'];

                    $update_forum_array = $this->getUserIdAndAlias(
                        (int) ($this->forumArray['UpdateUserId'] ?? 0),
                        ''
                    );
                    // Store old user id
                    // Manipulate user object
                    // changed smeyer 28.7.16: the session id is not manipulated
                    // anymore. Instead the user is passwd ilObjForum::update()
                    $this->forum->setTitle(ilUtil::stripSlashes((string) ($this->forumArray['Title'] ?? '')));
                    $this->forum->setDescription(
                        ilUtil::stripSlashes((string) ($this->forumArray['Description'] ?? ''))
                    );
                    $this->forum->update();
                    $this->forum->updateModificationUserId($update_forum_array['usr_id']);

                    $newObjProp = ilForumProperties::getInstance($this->forum->getId());
                    $newObjProp->setDefaultView(
                        (int) ($this->forumArray['DefaultView'] ?? ilForumProperties::VIEW_TREE)
                    );
                    $newObjProp->setAnonymisation((bool) ($this->forumArray['Pseudonyms'] ?? false));
                    $newObjProp->setStatisticsStatus((bool) ($this->forumArray['Statistics'] ?? false));
                    $newObjProp->setIsThreadRatingEnabled((bool) ($this->forumArray['ThreadRatings'] ?? false));
                    $newObjProp->setPostActivation((bool) ($this->forumArray['PostingActivation'] ?? false));
                    $newObjProp->setPresetSubject((bool) ($this->forumArray['PresetSubject'] ?? false));
                    $newObjProp->setAddReSubject((bool) ($this->forumArray['PresetRe'] ?? false));
                    $newObjProp->setNotificationType((string) ($this->forumArray['NotificationType'] ?: 'all_users'));
                    $newObjProp->setInterestedEvents((int) ($this->forumArray['NotificationEvents'] ?? 0));
                    $newObjProp->setAdminForceNoti((bool) ($this->forumArray['ForceNotification'] ?? false));
                    $newObjProp->setUserToggleNoti((bool) ($this->forumArray['ToggleNotification'] ?? false));
                    $newObjProp->setFileUploadAllowed((bool) ($this->forumArray['FileUpload'] ?? false));
                    $newObjProp->setMarkModeratorPosts((bool) ($this->forumArray['MarkModeratorPosts'] ?? false));
                    $newObjProp->update();

                    $id = $this->getNewForumPk();
                    $this->forum_obj_id = $newObjProp->getObjId();
                    $this->mapping['frm'][$this->forumArray['Id']] = $id;
                    $this->lastHandledForumId = $id;

                    $this->importMapping->addMapping(
                        'components/ILIAS/COPage',
                        'pg',
                        'frm:' . $this->forumArray['ObjId'],
                        'frm:' . $this->forum->getId()
                    );

                    if ($this->last_handled_style_id) {
                        self::$style_map[$this->last_handled_style_id][] = $newObjProp->getObjId();
                        $this->last_handled_style_id = null;
                    }

                    $this->forumArray = [];
                }
                break;

            case 'Thread':
                $update_str = null;
                if ($this->lastHandledPostId !== 0) {
                    $update_str = implode('#', [
                        (string) $this->lastHandledForumId,
                        (string) $this->lastHandledThreadId,
                        (string) $this->lastHandledPostId
                    ]);
                }

                $this->db->manipulateF(
                    'UPDATE frm_threads SET thr_last_post = %s WHERE thr_pk = %s',
                    ['text', 'integer'],
                    [$update_str, $this->lastHandledThreadId]
                );
                break;

            case 'Subject':
                $propertyValue['Subject'] = $this->cdata;
                break;

            case 'Alias':
                $propertyValue['Alias'] = $this->cdata;
                break;

            case 'Sticky':
                $propertyValue['Sticky'] = $this->cdata;
                break;

            case 'MarkModeratorPosts':
                $propertyValue['MarkModeratorPosts'] = $this->cdata;
                break;

            case 'Closed':
                $propertyValue['Closed'] = $this->cdata;

                if ($this->entity === 'thread' && $this->lastHandledForumId && $this->threadArray !== []) {
                    $this->forumThread = new ilForumTopic();
                    $this->forumThread->setId((int) ($this->threadArray['Id'] ?? 0));
                    $this->forumThread->setForumId($this->lastHandledForumId);
                    $this->forumThread->setSubject(
                        ilUtil::stripSlashes((string) ($this->threadArray['Subject'] ?? ''))
                    );
                    $this->forumThread->setSticky((bool) ($this->threadArray['Sticky'] ?? false));
                    $this->forumThread->setClosed((bool) ($this->threadArray['Closed'] ?? false));

                    $this->forumThread->setImportName(
                        isset($this->threadArray['ImportName']) ?
                            ilUtil::stripSlashes($this->threadArray['ImportName']) :
                            null
                    );
                    $this->forumThread->setCreateDate($this->threadArray['CreateDate']);
                    $this->forumThread->setChangeDate($this->threadArray['UpdateDate']);

                    $usr_data = $this->getUserIdAndAlias(
                        (int) ($this->threadArray['UserId'] ?? 0),
                        ilUtil::stripSlashes((string) ($this->threadArray['Alias'] ?? ''))
                    );

                    $this->forumThread->setDisplayUserId($usr_data['usr_id']);
                    $this->forumThread->setUserAlias($usr_data['usr_alias']);

                    if (version_compare($this->getSchemaVersion(), '4.5.0', '<=')) {
                        $this->threadArray['AuthorId'] = $this->threadArray['UserId'];
                    }

                    $author_id_data = $this->getUserIdAndAlias(
                        (int) ($this->threadArray['AuthorId'] ?? 0)
                    );
                    $this->forumThread->setThrAuthorId($author_id_data['usr_id']);

                    $this->forumThread->insert();

                    $this->mapping['thr'][$this->threadArray['Id']] = $this->forumThread->getId();
                    $this->lastHandledThreadId = $this->forumThread->getId();
                    $this->threadArray = [];
                }
                break;

            case 'Post':
                break;

            case 'Censorship':
                $propertyValue['Censorship'] = $this->cdata;
                break;

            case 'CensorshipMessage':
                $propertyValue['CensorshipMessage'] = $this->cdata;
                break;

            case 'Notification':
                $propertyValue['Notification'] = $this->cdata;
                break;

            case 'ImportName':
                $propertyValue['ImportName'] = $this->cdata;
                break;

            case 'Status':
                $propertyValue['Status'] = $this->cdata;
                break;

            case 'Message':
                $propertyValue['Message'] = $this->cdata;
                break;

            case 'Lft':
                $propertyValue['Lft'] = $this->cdata;
                break;

            case 'Rgt':
                $propertyValue['Rgt'] = $this->cdata;
                break;

            case 'Depth':
                $propertyValue['Depth'] = $this->cdata;
                break;

            case 'ParentId':
                $propertyValue['ParentId'] = $this->cdata;

                if (
                    $this->entity === 'post' &&
                    $this->lastHandledForumId &&
                    $this->postArray !== [] &&
                    $this->forumThread &&
                    $this->lastHandledThreadId
                ) {
                    $this->forumPost = new ilForumPost();
                    $this->forumPost->setThread($this->forumThread);

                    $this->forumPost->setId((int) $this->postArray['Id']);
                    $this->forumPost->setCensorship((bool) ($this->postArray['Censorship'] ?? false));
                    $this->forumPost->setCensorshipComment(
                        ilUtil::stripSlashes((string) ($this->postArray['CensorshipMessage'] ?? ''))
                    );
                    $this->forumPost->setNotification((bool) ($this->postArray['Notification'] ?? false));
                    $this->forumPost->setStatus((bool) ($this->postArray['Status'] ?? false));
                    $purifier = ilHtmlPurifierFactory::getInstanceByType('frm_post');
                    $this->forumPost->setMessage($purifier->purify((string) ($this->postArray['Message'] ?? '')));
                    $this->forumPost->setSubject(ilUtil::stripSlashes((string) ($this->postArray['Subject'] ?? '')));
                    $this->forumPost->setLft((int) $this->postArray['Lft']);
                    $this->forumPost->setRgt((int) $this->postArray['Rgt']);
                    $this->forumPost->setDepth((int) $this->postArray['Depth']);
                    $this->forumPost->setParentId((int) $this->postArray['ParentId']);
                    $this->forumPost->setThreadId($this->lastHandledThreadId);
                    $this->forumPost->setForumId($this->lastHandledForumId);

                    $this->forumPost->setImportName(
                        isset($this->postArray['ImportName']) ?
                            ilUtil::stripSlashes($this->postArray['ImportName']) :
                            null
                    );
                    $this->forumPost->setCreateDate($this->postArray['CreateDate']);
                    $this->forumPost->setChangeDate($this->postArray['UpdateDate']);

                    $usr_data = $this->getUserIdAndAlias(
                        (int) ($this->postArray['UserId'] ?? 0),
                        ilUtil::stripSlashes((string) ($this->postArray['Alias'] ?? ''))
                    );
                    $update_usr_data = $this->getUserIdAndAlias(
                        (int) ($this->postArray['UpdateUserId'] ?? 0)
                    );
                    $this->forumPost->setDisplayUserId($usr_data['usr_id']);
                    $this->forumPost->setUserAlias($usr_data['usr_alias']);
                    $this->forumPost->setUpdateUserId($update_usr_data['usr_id']);

                    if (version_compare($this->getSchemaVersion(), '4.5.0', '<=')) {
                        $this->postArray['AuthorId'] = $this->postArray['UserId'];
                    }
                    $author_id_data = $this->getUserIdAndAlias(
                        (int) ($this->postArray['AuthorId'] ?? 0)
                    );
                    $this->forumPost->setPosAuthorId((int) $author_id_data['usr_id']);

                    if (isset($this->postArray['isAuthorModerator']) && strtoupper($this->postArray['isAuthorModerator']) === 'NULL') {
                        $this->forumPost->setIsAuthorModerator(false);
                    } else {
                        $this->forumPost->setIsAuthorModerator((bool) $this->postArray['isAuthorModerator']);
                    }

                    $this->forumPost->insert();

                    if (isset($this->postArray['ParentId'], $this->mapping['pos'][$this->postArray['ParentId']])) {
                        $parentId = (int) $this->mapping['pos'][$this->postArray['ParentId']];
                    } else {
                        $parentId = 0;
                    }

                    $postTreeNodeId = $this->db->nextId('frm_posts_tree');
                    $this->db->insert('frm_posts_tree', [
                        'fpt_pk' => ['integer', $postTreeNodeId],
                        'thr_fk' => ['integer', $this->lastHandledThreadId],
                        'pos_fk' => ['integer', $this->forumPost->getId()],
                        'parent_pos' => ['integer', $parentId],
                        'lft' => ['integer', $this->postArray['Lft']],
                        'rgt' => ['integer', $this->postArray['Rgt']],
                        'depth' => ['integer', $this->postArray['Depth']],
                        'fpt_date' => ['timestamp', date('Y-m-d H:i:s')]
                    ]);

                    $this->mapping['pos'][($this->postArray['Id'] ?? 0)] = $this->forumPost->getId();
                    $this->lastHandledPostId = $this->forumPost->getId();

                    $media_objects_found = false;
                    foreach ($this->mediaObjects as $mob_attr) {
                        $importfile = $this->getImportDirectory() . '/' . $mob_attr['uri'];
                        if (is_file($importfile)) {
                            $mob = ilObjMediaObject::_saveTempFileAsMediaObject(
                                basename($importfile),
                                $importfile,
                                false
                            );
                            ilObjMediaObject::_saveUsage($mob->getId(), 'frm:html', $this->forumPost->getId());

                            $this->forumPost->setMessage(
                                str_replace(
                                    [
                                        'src="' . $mob_attr['label'] . '"',
                                        'src="' . preg_replace(
                                            "/(il)_[\d]+_(mob)_([\d]+)/",
                                            '$1_0_$2_$3',
                                            $mob_attr['label']
                                        ) . '"'
                                    ],
                                    'src="' . 'il_' . IL_INST_ID . '_mob_' . $mob->getId() . '"',
                                    $this->forumPost->getMessage()
                                )
                            );
                            $media_objects_found = true;
                        }
                    }

                    if ($media_objects_found) {
                        $this->forumPost->update();
                    }
                    $this->postArray = [];
                }

                break;

            case 'Content':
                $propertyValue['content'] = $this->cdata;
                break;

            case 'Attachment':
                $filedata = new ilFileDataForum($this->forum->getId(), $this->lastHandledPostId);

                $import_path = $this->contentArray['content'];
                if ($import_path !== '') {
                    $import_path = $this->getImportDirectory() . '/' . $import_path;
                    $filedata->importPath($import_path, (int) $this->lastHandledPostId);
                }
                break;
        }

        $this->cdata = '';
    }

    private function getIdAndAliasArray(int $imp_usr_id, string $param = 'import'): array
    {
        $where = '';
        $select = 'SELECT od.obj_id, ud.login FROM object_data od INNER JOIN usr_data ud ON od.obj_id = ud.usr_id';
        if ($param === 'import') {
            $where = ' WHERE od.import_id = ' . $this->db->quote(
                'il_' . $this->import_install_id . '_usr_' . $imp_usr_id,
                'text'
            );
        }

        if ($param === 'user') {
            $where = ' WHERE ud.usr_id = ' . $this->db->quote(
                $imp_usr_id,
                'integer'
            );
        }

        $query = $this->db->query($select . $where);

        while ($res = $this->db->fetchAssoc($query)) {
            break;
        }

        if ($res) {
            return [
                'usr_id' => (int) $res['obj_id'],
                'usr_alias' => (string) $res['login']
            ];
        }

        return [];
    }

    private function getAnonymousArray(): array
    {
        return [
            'usr_id' => $this->aobject->getId(),
            'usr_alias' => $this->aobject->getLogin()
        ];
    }

    private function getUserIdAndAlias(int $imp_usr_id, string $imp_usr_alias = ''): array
    {
        if ($imp_usr_id <= 0) {
            return [
                'usr_id' => $imp_usr_id,
                'usr_alias' => $imp_usr_alias
            ];
        }

        if ($this->import_install_id != IL_INST_ID && IL_INST_ID > 0) {
            // Different installations
            if (isset($this->user_id_mapping[$imp_usr_id])) {
                return $this->user_id_mapping[$imp_usr_id];
            }

            $res = $this->getIdAndAliasArray($imp_usr_id, 'import');
            if ($res !== []) {
                $this->user_id_mapping[$imp_usr_id] = $res;

                return $res;
            }

            $return_value = $this->getAnonymousArray();
            $this->user_id_mapping[$imp_usr_id] = $return_value;

            return $return_value;
        }

        if ($this->import_install_id == IL_INST_ID && IL_INST_ID == 0) {
            // Eventually different installations. We cannot determine it.
            if (isset($this->user_id_mapping[$imp_usr_id])) {
                return $this->user_id_mapping[$imp_usr_id];
            }

            $res = $this->getIdAndAliasArray($imp_usr_id, 'import');
            if ($res !== []) {
                $this->user_id_mapping[$imp_usr_id] = $res;

                return $res;
            }

            if (isset($this->user_id_mapping[$imp_usr_id])) {
                return $this->user_id_mapping[$imp_usr_id];
            }

            $res = $this->getIdAndAliasArray($imp_usr_id, 'user');
            if ($res !== []) {
                $this->user_id_mapping[$imp_usr_id] = $res;

                return $res;
            }

            $return_value = $this->getAnonymousArray();
            $this->user_id_mapping[$imp_usr_id] = $return_value;

            return $return_value;
        }

        if (isset($this->user_id_mapping[$imp_usr_id])) {
            return $this->user_id_mapping[$imp_usr_id];
        }

        $res = $this->getIdAndAliasArray($imp_usr_id, 'user');
        if ($res !== []) {
            $this->user_id_mapping[$imp_usr_id] = $res;

            return $res;
        }

        $return_value = $this->getAnonymousArray();
        $this->user_id_mapping[$imp_usr_id] = $return_value;

        return $return_value;
    }

    public function setImportInstallId($id): void
    {
        $this->import_install_id = $id;
    }

    private function getNewForumPk(): int
    {
        $query = 'SELECT top_pk FROM frm_data WHERE top_frm_fk = ' . $this->db->quote(
            $this->forum->getId(),
            'integer'
        );
        $res = $this->db->query($query);
        $data = $this->db->fetchAssoc($res);

        return (int) $data['top_pk'];
    }

    public function handlerCharacterData(XMLParser $a_xml_parser, string $a_data): void
    {
        if ($a_data !== "\n") {
            // Replace multiple tabs with one space
            $a_data = preg_replace("/\t+/", ' ', $a_data);

            $this->cdata .= $a_data;
        }
    }
}