class.arObjectCache.php

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<?php

class arObjectCache
{
    protected static array $cache = [];

    public static function isCached($class, $id): bool
    {
        new $class();

        if (!isset(self::$cache[$class])) {
            return false;
        }
        if (!isset(self::$cache[$class][$id])) {
            return false;
        }
        if (!self::$cache[$class][$id] instanceof ActiveRecord) {
            return false;
        }

        return array_key_exists($id, self::$cache[$class]);
    }

    public static function store(ActiveRecord $activeRecord): void
    {
        if (!isset($activeRecord->is_new)) {
            self::$cache[$activeRecord::class][$activeRecord->getPrimaryFieldValue()] = $activeRecord;
        }
    }

    public static function printStats(): void
    {
        foreach (self::$cache as $class => $objects) {
            echo $class;
            echo ": ";
            echo is_countable($objects) ? count($objects) : 0;
            echo " Objects<br>";
        }
    }

    public static function get(string $class, string $id): \ActiveRecord
    {
        new $class();
        if (!self::isCached($class, $id)) {
            throw new arException(arException::GET_UNCACHED_OBJECT, $class . ': ' . $id);
        }

        return self::$cache[$class][$id];
    }

    public static function purge(ActiveRecord $activeRecord): void
    {
        unset(self::$cache[$activeRecord::class][$activeRecord->getPrimaryFieldValue()]);
    }

    public static function flush($class_name): void
    {
        new $class_name();

        if ($class_name instanceof ActiveRecord) {
            $class_name = $class_name::class;
        }
        unset(self::$cache[$class_name]);
    }
}