midcom_services_permalinks::resolve_permalink()

Complexity

Conditions	14
Paths	31

Size

Total Lines	73
Code Lines	38

Duplication

Lines	0
Ratio	0 %

Code Coverage

Tests	19
CRAP Score	36.5685

Importance

Changes	1
Bugs	0	Features	0

<?php
    public function resolve_permalink($guid) : ?string
    {
        // resolves a guid into a fully qualified url, uses some heuristics for that, mainly replaces
        // the nap permalink resolver, with the difference that it will be based on the
        // components permalink interface code.

        $nav = new midcom_helper_nav();

        // Step 1: Maybe NAP already knows the topic.
        if ($napobj = $nav->resolve_guid($guid)) {
            return $napobj[MIDCOM_NAV_FULLURL];
        }

        try {
            $object = midcom::get()->dbfactory->get_object_by_guid($guid);
        } catch (midcom_error $e) {
            debug_add("Failed to resolve the GUID {$guid}, this is most probably an access denied error.", MIDCOM_LOG_ERROR);
            debug_add('Last MidCOM error string: ' . $e->getMessage());
            return null;
        }

        if (!$object->metadata->is_object_visible_onsite()) {
            return null;
        }

        if ($object instanceof midcom_db_topic) {
            if ($napobj = $nav->get_node($object->id)) {
                return $napobj[MIDCOM_NAV_FULLURL];
            }
            debug_add("Failed to retrieve the NAP object for topic {$object->id}.", MIDCOM_LOG_INFO);
            return null;
        }

        // Ok, unfortunately, this is not an immediate topic. We try to traverse
        // upwards in the object chain to find a topic.
        $parent = $object->get_parent();

        while ($parent) {
            if ($parent instanceof midcom_db_topic) {
                // Verify that this topic is within the current sites tree, if it is not,
                // we ignore it.
                if ($nav->is_node_in_tree($parent->id, $nav->get_root_node())) {
                    if ($object instanceof midcom_db_attachment) {
                        return $this->create_attachment_link($object->guid, $object->name);
                    }
                    if ($return_value = $this->_resolve_permalink_in_topic($parent, $object)) {
                        return $return_value;
                    }
                    break;
                }
            }
            $parent = $parent->get_parent();
        }

        // Bad, this means a full scan,
        // We need to try every topic for the GUID.
        $root_topic = midcom_core_context::get()->get_key(MIDCOM_CONTEXT_ROOTTOPIC);
        if (!empty($root_topic->id)) {
            $qb = midcom_db_topic::new_query_builder();
            $qb->add_constraint('name', '<>', '');
            $qb->add_constraint('up', 'INTREE', $root_topic->id);
            $topics = $qb->execute();
        } else {
            $topics = [$root_topic];
        }
        foreach ($topics as $topic) {
            if ($result = $this->_resolve_permalink_in_topic($topic, $object)) {
                return $result;
            }
        }

        // We were unable to find the GUID
        return null;
    }