PrivateSettingsCache.php

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<?php
namespace Elgg\Cache;

use Elgg\Values;
use ElggCache;

class PrivateSettingsCache {

    protected $cache;

    public function __construct(ElggCache $cache) {
        $this->cache = $cache;
    }

    public function load($key) {
        return $this->cache->load($key);
    }
    
    public function save($key, $data, $expire_after = null) {
        return $this->cache->save($key, $data, $expire_after);
    }

    public function populateFromEntities(...$guids) {
        try {
            $guids = Values::normalizeGuids($guids);
        } catch (\DataFormatException $e) {
            return null;
        }

        if (empty($guids)) {
            return null;
        }

        $cached_values = [];

        foreach ($guids as $i => $guid) {
            $value = $this->load($guid);
            if ($value !== null) {
                $cached_values[$guid] = $value;
                unset($guids[$i]);
            }
        }

        if (empty($guids)) {
            return $cached_values;
        }
        
        $data = _elgg_services()->privateSettings->getAllForGUIDs($guids);
        
        // store always for every guid, even if there is no settings
        foreach ($guids as $guid) {
            $settings = elgg_extract($guid, $data, []);
            
            $this->save($guid, $settings);
            $cached_values[$guid] = $settings;
        }
        
        return $cached_values;
    }
}