class.ilPreviewConfigStoredObjective.php

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<?php

use ILIAS\Setup;

class ilPreviewConfigStoredObjective implements Setup\Objective
{
    protected \ilPreviewSetupConfig $config;

    public function __construct(
        \ilPreviewSetupConfig $config
    ) {
        $this->config = $config;
    }

    public function getHash(): string
    {
        return hash("sha256", self::class);
    }

    public function getLabel(): string
    {
        return "Store configuration of Services/Preview";
    }

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

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

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

        $ini->setVariable(
            "tools",
            "ghostscript",
            $this->config->getPathToGhostscript() ?? ''
        );

        if (!$ini->write()) {
            throw new Setup\UnachievableException("Could not write ilias.ini.php");
        }

        return $environment;
    }

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

        return $ini->readVariable("tools", "ghostscript") !== $this->config->getPathToGhostscript();
    }
}