class.ilMyStaffAccess.php

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<?php

namespace ILIAS\MyStaff;

use ilObjectAccess;
use ilOrgUnitOperation;
use ilOrgUnitOperationContext;
use ilOrgUnitOperationContextQueries;
use ilOrgUnitOperationQueries;
use ilOrgUnitUserAssignmentQueries;

class ilMyStaffAccess extends ilObjectAccess
{

    const TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_SPEC_PERMISSIONS = 'tmp_obj_spec_perm';
    const TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_DEFAULT_PERMISSIONS = 'tmp_obj_def_perm';
    const TMP_DEFAULT_TABLE_NAME_PREFIX_IL_ORGU_DEFAULT_PERMISSIONS = 'tmp_orgu_def_perm';
    const TMP_DEFAULT_TABLE_NAME_PREFIX_CRS_MEMBERS = 'tmp_crs_members';
    const TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS = 'tmp_orgu_members';
    const TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_USER_MATRIX = 'tmp_obj_user_matr';
    const DEFAULT_ORG_UNIT_OPERATION = ilOrgUnitOperation::OP_ACCESS_ENROLMENTS;
    const DEFAULT_CONTEXT = 'crs';
    protected static $instance = null;
    protected static $orgu_users_of_current_user_show_staff_permission;


    public static function getInstance()
    {
        global $DIC;

        if (self::$instance === null) {
            self::$instance = new self();

            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_SPEC_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
                . self::DEFAULT_CONTEXT);
            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_DEFAULT_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION
                . "_" . self::DEFAULT_CONTEXT);
            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_ORGU_DEFAULT_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION
                . "_" . self::DEFAULT_CONTEXT);
            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_CRS_MEMBERS . "_user_id_" . $DIC->user()->getId());
            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS . "_user_id_" . $DIC->user()->getId());
            self::$instance->dropTempTable(self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_USER_MATRIX . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
                . self::DEFAULT_CONTEXT);
        }

        return self::$instance;
    }


    private function __construct()
    {
    }


    public function hasCurrentUserAccessToMyStaff() : bool
    {
        global $DIC;

        if ($DIC->rbac()->system()->checkAccess('visible', SYSTEM_FOLDER_ID)) {
            return true;
        }

        if (!$DIC->settings()->get("enable_my_staff")) {
            return false;
        }

        if ($this->hasCurrentUserAccessToUser()) {
            return true;
        }

        if ($this->countOrgusOfUserWithOperationAndContext($DIC->user()->getId(), ilOrgUnitOperation::OP_ACCESS_ENROLMENTS, self::DEFAULT_CONTEXT)
            > 0
        ) {
            return true;
        }

        if ($this->hasCurrentUserAccessToCourseLearningProgressForAtLeastOneUser()) {
            return true;
        }

        if ($this->hasCurrentUserAccessToCertificates()) {
            return true;
        }

        if ($this->hasCurrentUserAccessToCompetences()) {
            true;
        }

        return false;
    }


    public function hasCurrentUserAccessToCertificates() : bool
    {
        global $DIC;

        if (!$DIC->settings()->get("enable_my_staff")) {
            return false;
        }

        if ($this->countOrgusOfUserWithOperationAndContext($DIC->user()->getId(), ilOrgUnitOperation::OP_VIEW_CERTIFICATES, self::DEFAULT_CONTEXT)
            > 0
        ) {
            return true;
        }

        return false;
    }


    public function hasCurrentUserAccessToCompetences() : bool
    {
        global $DIC;

        if (!$DIC->settings()->get("enable_my_staff")) {
            return false;
        }

        if ($this->countOrgusOfUserWithOperationAndContext($DIC->user()->getId(), ilOrgUnitOperation::OP_VIEW_COMPETENCES, self::DEFAULT_CONTEXT)
            > 0
        ) {
            return true;
        }

        return false;
    }


    public function hasCurrentUserAccessToUser($usr_id = 0) : bool
    {
        global $DIC;

        $arr_users = $this->getUsersForUser($DIC->user()->getId());
        if (count($arr_users) > 0 && in_array($usr_id, $arr_users)) {
            return true;
        }

        return false;
    }


    public function hasCurrentUserAccessToLearningProgressInObject($ref_id = 0) : bool
    {
        global $DIC;

        return $DIC->access()->checkPositionAccess(ilOrgUnitOperation::OP_READ_LEARNING_PROGRESS, $ref_id);
    }


    public function hasCurrentUserAccessToCourseLearningProgressForAtLeastOneUser() : bool
    {
        global $DIC;

        $arr_usr_id = $this->getUsersForUserOperationAndContext($DIC->user()
            ->getId(), ilOrgUnitOperation::OP_READ_LEARNING_PROGRESS, self::DEFAULT_CONTEXT);
        if (count($arr_usr_id) > 0) {
            return true;
        }

        return false;
    }


    public function countOrgusOfUserWithAtLeastOneOperation($user_id)
    {
        global $DIC;

        $q = "SELECT COUNT(orgu_ua.orgu_id) AS 'cnt' FROM il_orgu_permissions AS perm
                                INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id
                                INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context is not NULL
                                WHERE orgu_ua.user_id = " . $DIC->database()->quote($user_id, 'integer') . " AND perm.operations is not NULL AND perm.parent_id = -1";

        $set = $DIC->database()->query($q);
        $rec = $DIC->database()->fetchAssoc($set);

        return $rec['cnt'];
    }


    public function countOrgusOfUserWithOperationAndContext($user_id, $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION, $context = self::DEFAULT_CONTEXT)
    {
        global $DIC;

        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        $q = "SELECT COUNT(orgu_ua.orgu_id) AS cnt FROM il_orgu_permissions AS perm
                                INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id
                                INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context = '" . $context . "'
                                and orgu_ua.user_id = " . $DIC->database()->quote($user_id, 'integer') . " AND perm.operations LIKE  '%\""
            . $operation->getOperationId() . "\"%'
                                WHERE perm.parent_id = -1";

        $set = $DIC->database()->query($q);
        $rec = $DIC->database()->fetchAssoc($set);

        return $rec['cnt'];
    }


    public function getUsersForUserOperationAndContext(
        $user_id,
        $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION,
        $context = self::DEFAULT_CONTEXT,
        $tmp_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_USER_MATRIX
    ) {
        global $DIC;

        $tmp_table_name = $this->buildTempTableIlobjectsUserMatrixForUserOperationAndContext($user_id, $org_unit_operation_string, $context, $tmp_table_name_prefix);

        $q = 'SELECT usr_id FROM ' . $tmp_table_name;

        $user_set = $DIC->database()->query($q);

        $arr_users = array();

        while ($rec = $DIC->database()->fetchAssoc($user_set)) {
            $arr_users[$rec['usr_id']] = $rec['usr_id'];
        }

        return $arr_users;
    }


    public function getUsersForUserPerPosition($user_id) : array
    {
        $users = [];
        $user_assignments = ilOrgUnitUserAssignmentQueries::getInstance()->getAssignmentsOfUserId($user_id);
        foreach ($user_assignments as $user_assignment) {
            $users[$user_assignment->getPositionId()] = $this->getUsersForUser($user_id, $user_assignment->getPositionId());
        }

        return $users;
    }


    public function getUsersForUser($user_id, ?int $position_id = null) : array
    {
        global $DIC;

        $tmp_orgu_members = $this->buildTempTableOrguMemberships(self::TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS, array());

        $position_limitation = '';
        if (!is_null($position_id)) {
            $position_limitation = ' AND orgu_ua_current_user.position_id = ' . $position_id;
        }

        $q = "SELECT  " . $tmp_orgu_members . ".user_id AS usr_id
                        FROM 
                                " . $tmp_orgu_members . "
                                INNER JOIN il_orgu_ua AS orgu_ua_current_user on orgu_ua_current_user.user_id = " . $DIC->database()->quote($user_id, 'integer') . "
                                INNER JOIN il_orgu_authority AS auth ON auth.position_id = orgu_ua_current_user.position_id " . $position_limitation . "
                                WHERE
                                (
                                /* Identische OrgUnit wie Current User; Nicht Rekursiv; Fixe Position */
                                        (orgu_ua_current_user.orgu_id = " . $tmp_orgu_members . ".orgu_id AND auth.scope = 1
                                                AND auth.over = " . $tmp_orgu_members . ".user_position_id AND auth.over <> -1
                                        )
                                        OR
                                        /* Identische OrgUnit wie Current User; Nicht Rekursiv; Position egal */
                                        (orgu_ua_current_user.orgu_id = " . $tmp_orgu_members . ".orgu_id AND auth.scope = 1 AND auth.over = -1)
                                        OR
                                        /* Kinder OrgUnit wie Current User */
                                        (
                                                (
                                                        " . $tmp_orgu_members . ".orgu_id = orgu_ua_current_user.orgu_id OR
                                                        " . $tmp_orgu_members . ".tree_path LIKE CONCAT(\"%.\",orgu_ua_current_user.orgu_id ,\".%\")
                                                        OR
                                                        " . $tmp_orgu_members . ".tree_path LIKE  CONCAT(\"%.\",orgu_ua_current_user.orgu_id )
                                                )
                                                AND 
                                                (
                                                        (
                                                                (
                                                                        /* Gleiche Position */
                                                                        auth.over = " . $tmp_orgu_members . ".user_position_id AND auth.over <> -1
                                                                )
                                                                OR
                                                                (
                                                                        /* Position Egal */
                                                                        auth.over = -1
                                                                )
                                                        )
                                                        AND auth.scope = 2
                                                )
                                        )
                                )";

        $user_set = $DIC->database()->query($q);

        $arr_users = array();

        while ($rec = $DIC->database()->fetchAssoc($user_set)) {
            $arr_users[$rec['usr_id']] = $rec['usr_id'];
        }

        return $arr_users;
    }


    public function getIdsForUserAndOperation(int $user_id, string $operation, bool $return_ref_id = false) : array
    {
        $user_assignments = ilOrgUnitUserAssignmentQueries::getInstance()->getAssignmentsOfUserId($user_id);
        $ids = [];
        foreach ($user_assignments as $user_assignment) {
            $ref_ids = $this->getIdsForPositionAndOperation($user_assignment->getPositionId(), $operation, $return_ref_id);
            if(count($ref_ids) > 0) {
                $ids = array_merge($ids, $ref_ids);
            }
        }

        return $ids;
    }


    public function getIdsForPositionAndOperation(int $position_id, string $operation, bool $return_ref_id) : array
    {
        $ids = [];
        foreach (ilOrgUnitOperationContext::$available_contexts as $context) {
            $ref_ids = $this->getIdsForPositionAndOperationAndContext($position_id, $operation, $context, $return_ref_id);
            if(count($ref_ids) > 0) {
                $ids = array_merge($ids, $ref_ids);
            }
        }

        return $ids;
    }


    public function getIdsForPositionAndOperationAndContext(int $position_id, string $operation, string $context, bool $return_ref_id) : array
    {
        global $DIC;
        $context_id = ilOrgUnitOperationContextQueries::findByName($context)->getId();
        $operation_object = ilOrgUnitOperationQueries::findByOperationString($operation, $context);
        if (is_null($operation_object)) {
            // operation doesn't exist in this context
            return [];
        }
        $operation_id = $operation_object->getOperationId();

        if ($this->hasPositionDefaultPermissionForOperationInContext($position_id, $operation_id, $context_id)) {
            $query = 'select ' . ($return_ref_id ? 'object_reference.ref_id' : 'object_data.obj_id') . ' from object_data ' .
                'inner join object_reference on object_reference.obj_id = object_data.obj_id ' .
                'where type = "' . $context . '" ' .
                'AND object_reference.ref_id not in ' .
                '   (SELECT parent_id FROM il_orgu_permissions ' .
                '   where position_id = ' . $position_id . ' and context_id = ' . $context_id . ' and operations not like \'%"' . $operation_id . '"%\' and parent_id <> -1)';
        } else {
            $query = $return_ref_id
                ?
                'SELECT parent_id as ref_id FROM il_orgu_permissions '
                :
                'SELECT obj_id FROM il_orgu_permissions INNER JOIN object_reference ON object_reference.ref_id = il_orgu_permissions.parent_id ';
            $query .= ' where position_id = ' . $position_id . ' and context_id = ' . $context_id . ' and operations like \'%"' . $operation_id . '"%\' and parent_id <> -1';
        }

        return array_map(function ($item) use ($return_ref_id) {
            return $return_ref_id ? $item['ref_id'] : $item['obj_id'];
        }, $DIC->database()->fetchAll($DIC->database()->query($query)));
    }


    public function hasPositionDefaultPermissionForOperationInContext(int $position_id, int $operation_id, int $context_id) : bool
    {
        global $DIC;
        $res = $DIC->database()->query('SELECT * FROM il_orgu_permissions ' .
            ' WHERE context_id = ' . $context_id . ' ' .
            'AND operations LIKE \'%"' . $operation_id . '"%\' ' .
            'AND position_id = ' . $position_id . ' ' .
            'AND parent_id = -1');

        return (bool) $DIC->database()->numRows($res) > 0;
    }


    public function getIlobjectsAndUsersForUserOperationAndContext($user_id, $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION, $context = self::DEFAULT_CONTEXT)
    {
        global $DIC;

        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        $tmp_table_name = 'tmp_ilobj_user_matrix_' . $operation->getOperationId();

        $this->buildTempTableIlobjectsUserMatrixForUserOperationAndContext($user_id, $org_unit_operation_string, $context, $tmp_table_name);

        $q = 'SELECT * FROM ' . $tmp_table_name;

        $user_set = $DIC->database()->query($q);

        $arr_user_obj = array();

        while ($rec = $DIC->database()->fetchAssoc($user_set)) {
            $arr_user_obj[] = $rec;
        }

        return $arr_user_obj;
    }


    public function buildTempTableIlobjectsUserMatrixForUserOperationAndContext(
        $user_id,
        $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION,
        $context = self::DEFAULT_CONTEXT,
        $temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_USER_MATRIX
    ) {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_" . $org_unit_operation_string . "_" . $context;

        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        $all_users_for_user = $this->getUsersForUser($GLOBALS['DIC']->user()->getId());

        $tmp_table_objects_specific_perimissions = $this->buildTempTableIlobjectsSpecificPermissionSetForOperationAndContext(
            $org_unit_operation_string,
            $context,
            self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_SPEC_PERMISSIONS
        );

        $tmp_table_objects_default_perimissions = $this->buildTempTableIlobjectsDefaultPermissionSetForOperationAndContext(
            $org_unit_operation_string,
            $context,
            self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_DEFAULT_PERMISSIONS
        );

        $tmp_table_orgunit_default_perimissions = $this->buildTempTableIlorgunitDefaultPermissionSetForOperationAndContext(
            $org_unit_operation_string,
            $context,
            self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_ORGU_DEFAULT_PERMISSIONS
        );

        $tmp_table_course_members = $this->buildTempTableCourseMemberships(self::TMP_DEFAULT_TABLE_NAME_PREFIX_CRS_MEMBERS, $all_users_for_user);

        $tmp_table_orgu_members = $this->buildTempTableOrguMemberships(self::TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS, $all_users_for_user);

        $tmp_table_orgu_member_path = $this->buildTempTableOrguMemberships('tmp_orgu_members_path', $all_users_for_user);

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_USER_MATRIX . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
            . self::DEFAULT_CONTEXT
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " AS (
                                SELECT DISTINCT user_perm_matrix.perm_for_ref_id, user_perm_matrix.usr_id FROM
                                (
                                 SELECT crs.*," . $tmp_table_course_members . ".ref_id," . $tmp_table_course_members . ".usr_id FROM
                                        (
                                                SELECT * FROM " . $tmp_table_objects_specific_perimissions . "
                                                        UNION
                                                SELECT * FROM " . $tmp_table_objects_default_perimissions . "
                                        ) AS crs
                                        INNER JOIN " . $tmp_table_course_members . " on " . $tmp_table_course_members . ".ref_id = crs.perm_for_ref_id 
                                        and (
                                                        (
                                                        " . $tmp_table_course_members . ".orgu_id = crs.perm_for_orgu_id AND " . $tmp_table_course_members . ".position_id = crs.perm_over_user_with_position AND perm_orgu_scope = 1
                                                        )
                                                        or perm_orgu_scope = 2
                                                )
                                UNION
                                        SELECT " . $tmp_table_orgunit_default_perimissions . ".*, " . $tmp_table_orgu_members . ".orgu_id AS ref_id, "
            . $tmp_table_orgu_members . ".user_id FROM " . $tmp_table_orgunit_default_perimissions . "
                                        INNER JOIN " . $tmp_table_orgu_members . " on " . $tmp_table_orgu_members . ".orgu_id = "
            . $tmp_table_orgunit_default_perimissions . ".perm_for_ref_id
                                        and (
                                                        (
                                                        " . $tmp_table_orgu_members . ".orgu_id = " . $tmp_table_orgunit_default_perimissions . ".perm_for_orgu_id AND "
            . $tmp_table_orgu_members . ".user_position_id = " . $tmp_table_orgunit_default_perimissions . ".perm_over_user_with_position AND perm_orgu_scope = 1
                                                        )
                                                        or perm_orgu_scope = 2
                                                )
                                        
                                ) AS user_perm_matrix  
                                INNER JOIN " . $tmp_table_orgu_member_path . " AS path on path.user_id = user_perm_matrix.usr_id
                                
                                INNER JOIN il_orgu_ua AS orgu_ua_current_user on orgu_ua_current_user.user_id = " . $DIC->database()->quote($user_id, 'integer') . "
                                INNER JOIN il_orgu_permissions AS perm on perm.position_id = orgu_ua_current_user.position_id AND perm.parent_id = -1
                                INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context =  '$context'
                                and perm.operations  LIKE '%\"" . $operation->getOperationId() . "\"%'
                                
                                AND
                                ( 
                                        /* Identische OrgUnit wie Current User; Nicht Rekursiv; Fixe Position */
                                        (orgu_ua_current_user.orgu_id = user_perm_matrix.perm_for_orgu_id AND user_perm_matrix.perm_orgu_scope = 1
                                        AND orgu_ua_current_user.position_id = user_perm_matrix.perm_for_position_id AND user_perm_matrix.perm_over_user_with_position <> -1
                                        )
                                OR
                                        /* Identische OrgUnit wie Current User; Nicht Rekursiv; Position egal */
                                        (orgu_ua_current_user.orgu_id = user_perm_matrix.perm_for_orgu_id AND user_perm_matrix.perm_orgu_scope = 1 AND user_perm_matrix.perm_over_user_with_position = -1)
                                OR
                                        /* Kinder OrgUnit wie Current User */
                                        (
                                                orgu_ua_current_user.orgu_id = user_perm_matrix.perm_for_orgu_id
                                                AND
                                                (
                                                        path.orgu_id = user_perm_matrix.perm_for_orgu_id OR
                                                        path.tree_path LIKE CONCAT(\"%.\",user_perm_matrix.perm_for_orgu_id ,\".%\")
                                                        OR
                                                        path.tree_path LIKE  CONCAT(\"%.\",user_perm_matrix.perm_for_orgu_id )
                                                )
                                                AND 
                                                (
                                                        (
                                                                (
                                                                        /* Gleiche Position */
                                                                        orgu_ua_current_user.position_id = user_perm_matrix.perm_for_position_id AND user_perm_matrix.perm_over_user_with_position <> -1
                                                                )
                                                                OR
                                                                (
                                                                        /* Position Egal */
                                                                        user_perm_matrix.perm_over_user_with_position = -1
                                                                )
                                                        )
                                                        AND user_perm_matrix.perm_orgu_scope = 2
                                                )
                                        )
                                )       
                        );";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function buildTempTableIlobjectsSpecificPermissionSetForOperationAndContext(
        $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION,
        $context = self::DEFAULT_CONTEXT,
        $temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_SPEC_PERMISSIONS
    ) {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_" . $org_unit_operation_string . "_" . $context;

        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_SPEC_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
            . self::DEFAULT_CONTEXT
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " 
                                (INDEX i1 (perm_for_ref_id), INDEX i2 (perm_for_orgu_id), INDEX i3 (perm_orgu_scope), INDEX i4 (perm_for_position_id), INDEX i5 (perm_over_user_with_position))
                                AS (
                                 SELECT 
                                        obj_ref.ref_id AS perm_for_ref_id,
                                        orgu_ua.orgu_id AS perm_for_orgu_id,
                                auth.scope AS perm_orgu_scope,
                                        orgu_ua.position_id AS perm_for_position_id,
                                        auth.over AS perm_over_user_with_position
                                        FROM
                                        il_orgu_permissions AS perm
                                        INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id
                                        INNER JOIN il_orgu_authority AS auth ON auth.position_id = orgu_ua.position_id AND orgu_ua.user_id = " . $GLOBALS['DIC']->user()
                ->getId() . "
                                        INNER JOIN object_reference AS obj_ref ON obj_ref.ref_id =  perm.parent_id
                                        INNER JOIN object_data AS obj ON obj.obj_id = obj_ref.obj_id AND obj.type = '$context'
                                        INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context = '$context'
                                        WHERE
                                    perm.operations LIKE '%\"" . $operation->getOperationId() . "\"%'
                        );";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function buildTempTableIlobjectsDefaultPermissionSetForOperationAndContext(
        $org_unit_operation_string = ilOrgUnitOperation::OP_ACCESS_ENROLMENTS,
        $context = self::DEFAULT_CONTEXT,
        $temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_DEFAULT_PERMISSIONS
    ) {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_" . $org_unit_operation_string . "_" . $context;

        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_OBJ_DEFAULT_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
            . self::DEFAULT_CONTEXT
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " 
                (INDEX i1 (perm_for_ref_id), INDEX i2 (perm_for_orgu_id), INDEX i3 (perm_orgu_scope), INDEX i4 (perm_for_position_id),INDEX i5 (perm_over_user_with_position))
                AS (
                                        SELECT 
                                        obj_ref.ref_id AS perm_for_ref_id,
                                        orgu_ua.orgu_id AS perm_for_orgu_id,
                                auth.scope AS perm_orgu_scope,
                                        orgu_ua.position_id AS perm_for_position_id,
                                        auth.over AS perm_over_user_with_position
                                    FROM
                                    object_data AS obj
                                    INNER JOIN object_reference AS obj_ref ON obj_ref.obj_id = obj.obj_id
                                    INNER JOIN il_orgu_permissions AS perm ON perm.operations LIKE '%\"" . $operation->getOperationId() . "\"%' AND perm.parent_id = -1
                                    INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context = '" . $context . "'
                                    INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id AND orgu_ua.user_id = " . $GLOBALS['DIC']->user()
                ->getId() . "
                                    INNER JOIN il_orgu_authority AS auth ON auth.position_id = orgu_ua.position_id
                                    
                                    WHERE
                                        obj.type = '" . $context . "'
                                            AND (obj_ref.ref_id , orgu_ua.position_id) 
                                            
                                            NOT IN (SELECT 
                                                perm.parent_id, orgu_ua.position_id
                                            FROM
                                                il_orgu_permissions AS perm
                                            INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id
                                            INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context = '" . $context . "'
                                            WHERE perm.parent_id <> -1)
                                                        );";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function buildTempTableIlorgunitDefaultPermissionSetForOperationAndContext(
        $org_unit_operation_string = self::DEFAULT_ORG_UNIT_OPERATION,
        $context = self::DEFAULT_CONTEXT,
        $temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_ORGU_DEFAULT_PERMISSIONS
    ) {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_" . $org_unit_operation_string . "_" . $context;
        $operation = ilOrgUnitOperationQueries::findByOperationString($org_unit_operation_string, $context);

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_IL_ORGU_DEFAULT_PERMISSIONS . "_" . self::DEFAULT_ORG_UNIT_OPERATION . "_"
            . self::DEFAULT_CONTEXT
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " 
                          (INDEX i1 (perm_for_ref_id), INDEX i2 (perm_for_orgu_id), INDEX i3 (perm_orgu_scope), INDEX i4 (perm_for_position_id), INDEX i5 (perm_over_user_with_position))
                AS (
                                        SELECT 
                            orgu_ua.orgu_id AS perm_for_ref_id, /* Table has to be identical to the other Permission For Operation And Context-Tables! */
                                        orgu_ua.orgu_id AS perm_for_orgu_id,
                                auth.scope AS perm_orgu_scope,
                                        orgu_ua.position_id AS perm_for_position_id,
                                        auth.over AS perm_over_user_with_position
                                    FROM
                                        il_orgu_permissions AS perm
                                    INNER JOIN il_orgu_ua AS orgu_ua ON orgu_ua.position_id = perm.position_id AND perm.parent_id = -1 AND orgu_ua.user_id = "
            . $GLOBALS['DIC']->user()->getId() . "
                                    INNER JOIN il_orgu_authority AS auth ON auth.position_id = orgu_ua.position_id
                                    INNER JOIN il_orgu_op_contexts AS contexts on contexts.id = perm.context_id AND contexts.context = '" . $context . "'
                                    WHERE
                                    perm.operations LIKE '%\"" . $operation->getOperationId() . "\"%'
                                                        );";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function buildTempTableCourseMemberships($temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_CRS_MEMBERS, array $only_courses_of_user_ids = array())
    {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_user_id_" . $DIC->user()->getId();

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_CRS_MEMBERS . "_user_id_" . $DIC->user()->getId()
            || count($only_courses_of_user_ids) > 0
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " 
                (INDEX i1(ref_id), INDEX i2 (usr_id), INDEX i3 (position_id), INDEX i4 (orgu_id))
                AS (
                                        SELECT crs_members_crs_ref.ref_id, crs_members.usr_id, orgu_ua.position_id, orgu_ua.orgu_id
                                                FROM (
                                                        SELECT obj_id, usr_id FROM obj_members WHERE member = 1
                                                        AND " . $DIC->database()->in('obj_members.usr_id', $only_courses_of_user_ids, false, 'integer') . " 
                                                UNION
                                                        SELECT obj_id, usr_id FROM crs_waiting_list
                                                        WHERE " . $DIC->database()->in('crs_waiting_list.usr_id', $only_courses_of_user_ids, false, 'integer') . " 
                                                UNION
                                                        SELECT obj_id, usr_id FROM il_subscribers
                                                        WHERE " . $DIC->database()->in('il_subscribers.usr_id', $only_courses_of_user_ids, false, 'integer') . " 
                                                ) AS crs_members
                                                INNER JOIN object_reference AS crs_members_crs_ref on crs_members_crs_ref.obj_id = crs_members.obj_id
                                                INNER JOIN il_orgu_ua AS orgu_ua on orgu_ua.user_id = crs_members.usr_id
                          );";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function buildTempTableOrguMemberships($temporary_table_name_prefix = self::TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS, array $only_orgus_of_user_ids = array())
    {
        global $DIC;

        $temporary_table_name = $temporary_table_name_prefix . "_user_id_" . $DIC->user()->getId();

        if ($temporary_table_name != self::TMP_DEFAULT_TABLE_NAME_PREFIX_ORGU_MEMBERS . "_user_id_" . $DIC->user()->getId()
            || count($only_orgus_of_user_ids) > 0
        ) {
            $this->dropTempTable($temporary_table_name);
        }

        $q = "CREATE TEMPORARY TABLE IF NOT EXISTS " . $temporary_table_name . " 
                        (INDEX i1(orgu_id), INDEX i2 (tree_path), INDEX i3 (tree_child), INDEX i4 (tree_parent), INDEX i5 (tree_lft), INDEX i6 (tree_rgt), INDEX i7 (user_position_id), INDEX i8 (user_id))
                AS (
                                        SELECT  orgu_ua.orgu_id AS orgu_id,
                                                        tree_orgu.path AS tree_path,
                                                        tree_orgu.child AS tree_child,
                                                        tree_orgu.parent AS tree_parent,
                                                        tree_orgu.lft AS tree_lft,
                                                        tree_orgu.rgt AS tree_rgt,
                                                        orgu_ua.position_id AS user_position_id,
                                                        orgu_ua.user_id AS user_id
                                                        FROM
                                                        il_orgu_ua AS orgu_ua
                                                        INNER JOIN object_reference AS obj_ref on obj_ref.ref_id = orgu_ua.orgu_id AND obj_ref.deleted is null
                                                        LEFT JOIN tree AS tree_orgu ON tree_orgu.child = orgu_ua.orgu_id";

        if (count($only_orgus_of_user_ids) > 0) {
            $q .= " WHERE " . $DIC->database()->in('orgu_ua.user_id', $only_orgus_of_user_ids, false, 'integer') . " ";
        }

        $q .= ");";

        $DIC->database()->manipulate($q);

        return $temporary_table_name;
    }


    public function dropTempTable($temporary_table_name)
    {
        global $DIC;

        $q = "DROP TABLE IF EXISTS " . $temporary_table_name;
        $DIC->database()->manipulate($q);

        return true;
    }
}