composer.php

class Composer {
    public static function install() {
        $dependencies = $this->readComposerJson();
        $this->pullDependencies($dependencies);
        $this->createAutoload();
    }

    private function readComposerJson() {
        // Membaca dan menguraikan composer.json
        $composerJson = file_get_contents('composer.json');
        $composerData = json_decode($composerJson, true);
        return $composerData['require'];
    }

    private function pullDependencies($dependencies) {
        // Mengunduh dan mengekstrak dependensi
        foreach ($dependencies as $package => $version) {
            // Misalnya, kita akan mengunduh dari GitHub
            $url = "https://api.github.com/repos/{$package}/zipball/{$version}";
            $zipFile = __DIR__ . "/{$package}-{$version}.zip";

            // Mengunduh file zip
            $contents = file_get_contents($url);
            file_put_contents($zipFile, $contents);

            // Mengekstrak file zip
            $zip = new ZipArchive;
            if ($zip->open($zipFile) === TRUE) {
                $zip->extractTo(__DIR__ . '/vendor');
                $zip->close();
                unlink($zipFile);
            } else {
                echo 'Gagal mengekstrak';
            }
        }
    }

    private function updateAutoload() {
        // Mengatur autoloaders secara manual
        spl_autoload_register(function ($class) {
            $file = __DIR__ . '/vendor/' . str_replace('\\', '/', $class) . '.php';
            if (file_exists($file)) {
                require_once $file;
                return true;
            }
            return false;
        });
    }

    private function createAutoload() {
        $autoloadContent = '<?php' . PHP_EOL;
        $autoloadContent .= 'foreach (glob(__DIR__ . "/vendor/*/*.php") as $file) {' . PHP_EOL;
        $autoloadContent .= '    require_once $file;' . PHP_EOL;
        $autoloadContent .= '}' . PHP_EOL;
        $autoloadFile = __DIR__ . '/autoload.php';
        file_put_contents($autoloadFile, $autoloadContent);
    }
}

// Contoh penggunaan:
$composer = Composer::install();