index.php

<?php

declare(strict_types=1);

namespace Shimmie2;

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Make sure that shimmie is correctly installed                             *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

$_shm_load_start = microtime(true);
if (!file_exists("vendor/")) {
    die("
        <p>Shimmie is unable to find the composer <code>vendor</code> directory.</p>
		<p>To finish installing, you need to run <code>composer install</code>
		in the shimmie directory (<code>".getcwd()."</code>).</p>
		<p>(If you don't have composer, <a href='https://getcomposer.org/'>get it here</a>)</p>
	");
}
require_once "vendor/autoload.php";

sanitize_php();
version_check("8.2");

if (!file_exists("data/config/shimmie.conf.php")) {
    Installer::install();
    exit;
}


/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Load files                                                                *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

@include_once "data/config/shimmie.conf.php";
@include_once "data/config/extensions.conf.php";

_set_up_shimmie_environment();
Ctx::setTracer(new \EventTracer());
// Override TS to show that bootstrapping started in the past
Ctx::$tracer->begin("Bootstrap", raw: ["ts" => $_shm_load_start * 1e6]);
_load_ext_files();
// Depends on core files
$cache = Ctx::setCache(load_cache(SysConfig::getCacheDsn()));
$database = Ctx::setDatabase(new Database(SysConfig::getDatabaseDsn()));
// $config depends on _load_ext_files (to load config.php files and
// calculate defaults) and $cache (to cache config values)
$config = Ctx::setConfig(new DatabaseConfig($database, defaults: ConfigGroup::get_all_defaults()));
// theme files depend on $config (theme name is a config value)
_load_theme_files();
// $page depends on theme files (to load theme-specific Page class)
$page = Ctx::setPage(Themelet::get_theme_class(Page::class) ?? new Page());
// $event_bus depends on ext/*/main.php being loaded
Ctx::setEventBus(new EventBus());
Ctx::$tracer->end();

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *\
* Send events, display output                                               *
\* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */

function main(): int
{
    global $cache, $config, $database, $user, $page, $_shm_load_start;

    try {
        // Ctx::$tracer->mark($_SERVER["REQUEST_URI"] ?? "No Request");
        Ctx::$tracer->begin(
            $_SERVER["REQUEST_URI"] ?? "No Request",
            [
                "user" => $_COOKIE["shm_user"] ?? "No User",
                "ip" => Network::get_real_ip(),
                "user_agent" => $_SERVER['HTTP_USER_AGENT'] ?? "No UA",
            ]
        );

        if (!$config->get_bool(SetupConfig::NO_AUTO_DB_UPGRADE)) {
            send_event(new DatabaseUpgradeEvent());
        }
        send_event(new InitExtEvent());

        // start the page generation waterfall
        $user = Ctx::setUser(_get_user());
        send_event(new UserLoginEvent($user));
        if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
            ob_end_flush();
            ob_implicit_flush(true);
            $app = new CliApp();
            send_event(new CliGenEvent($app));
            if ($app->run() !== 0) {
                throw new \Exception("CLI command failed");
            }
            if ($app->traceFile !== null) {
                Ctx::$tracer->end();
                Ctx::$tracer->flush($app->traceFile);
            }
        } else {
            send_event(new PageRequestEvent($_SERVER['REQUEST_METHOD'], _get_query(), $_GET, $_POST));
            $page->display();
        }

        if ($database->is_transaction_open()) {
            $database->commit();
        }

        // saving cache data and profiling data to disk can happen later
        if (function_exists("fastcgi_finish_request")) {
            fastcgi_finish_request();
        }
        $exit_code = 0;
    } catch (\Throwable $e) {
        if ($database->is_transaction_open()) {
            $database->rollback();
        }
        if (is_a($e, \Shimmie2\UserError::class)) {
            $page->set_mode(PageMode::PAGE);
            $page->set_code($e->http_code);
            $page->set_title("Error");
            $page->add_block(new Block(null, \MicroHTML\SPAN($e->getMessage())));
            $page->display();
        } else {
            _fatal_error($e);
        }
        $exit_code = 1;
    } finally {
        Ctx::$tracer->end();
        if (!is_null(SysConfig::getTraceFile())) {
            if (
                empty($_SERVER["REQUEST_URI"])
                || (@$_GET["trace"] === "on")
                || (
                    (ftime() - $_shm_load_start) > SysConfig::getTraceThreshold()
                    && ($_SERVER["REQUEST_URI"] ?? "") !== "/upload"
                )
            ) {
                Ctx::$tracer->flush(SysConfig::getTraceFile());
            }
        }
    }
    return $exit_code;
}

if (PHP_SAPI === 'cli' || PHP_SAPI === 'phpdbg') {
    exit(main());
} else {
    main();
}