class.ilSettingsFactoryExistsObjective.php

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<?php

/* Copyright (c) 2019 Richard Klees <richard.klees@concepts-and-training.de> Extended GPL, see docs/LICENSE */

use ILIAS\Setup;

class ilSettingsFactoryExistsObjective implements Setup\Objective
{
    public function getHash() : string
    {
        return hash("sha256", self::class);
    }

    public function getLabel() : string
    {
        return "Initialize factory for ilSetting";
    }

    public function isNotable() : bool
    {
        return false;
    }

    public function getPreconditions(Setup\Environment $environment) : array
    {
        return [
            new ilDatabaseInitializedObjective()
        ];
    }

    public function achieve(Setup\Environment $environment) : Setup\Environment
    {
        $db = $environment->getResource(Setup\Environment::RESOURCE_DATABASE);

        if (!($db instanceof \ilDBInterface)) {
            throw new Setup\UnachievableException("Database does not exist.");
        }

        return $environment
            ->withResource(
                Setup\Environment::RESOURCE_SETTINGS_FACTORY,
                new \ilSettingsFactory($db)
            );
    }

    public function isApplicable(Setup\Environment $environment) : bool
    {
        $resource = $environment->getResource(Setup\Environment::RESOURCE_SETTINGS_FACTORY);

        return !($resource instanceof ilSettingsFactory);
    }
}