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/tools/Connectionink/connlink_bootstrap.php

<?php
declare(strict_types=1);

const CONNLINK_DATA_DIR = __DIR__ . '/data';
if (!is_dir(CONNLINK_DATA_DIR)) {
    mkdir(CONNLINK_DATA_DIR, 0775, true);
}

function connlink_now(): string
{
    return gmdate('c');
}

function connlink_strlen(string $text): int
{
    return function_exists('mb_strlen') ? mb_strlen($text) : strlen($text);
}

function connlink_write_json(string $filename, array $payload): void
{
    $path = CONNLINK_DATA_DIR . '/' . $filename;
    file_put_contents($path, json_encode($payload, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES));
}

function connlink_append_ndjson(string $filename, array $payload): void
{
    $path = CONNLINK_DATA_DIR . '/' . $filename;
    file_put_contents($path, json_encode($payload, JSON_UNESCAPED_SLASHES) . PHP_EOL, FILE_APPEND);
}

function connlink_is_cli(): bool
{
    return PHP_SAPI === 'cli';
}

function connlink_output(array $payload): void
{
    if (!headers_sent()) {
        header('Content-Type: application/json; charset=utf-8');
    }
    echo json_encode($payload, JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES);
}

function connlink_list_files(string $root): array
{
    $files = [];
    $iterator = new RecursiveIteratorIterator(
        new RecursiveDirectoryIterator($root, FilesystemIterator::SKIP_DOTS)
    );

foreach ($iterator as $file) {
        /** @var SplFileInfo $file */
        if ($file->isFile()) {
            $files[] = $file->getPathname();
        }
    }

sort($files);
    return $files;
}

function connlink_encrypt_string(string $plaintext, string $keyVersion = 'v1'): array
{
    $masterKey = hash('sha256', 'SIMON_CONNLINK_MASTER_KEY_' . $keyVersion, true);
    if (function_exists('openssl_encrypt')) {
        $cipher = 'aes-256-gcm';
        $iv = random_bytes(12);
        $tag = '';
        $aad = json_encode(['key_version' => $keyVersion], JSON_UNESCAPED_SLASHES);
        $ciphertext = openssl_encrypt($plaintext, $cipher, $masterKey, OPENSSL_RAW_DATA, $iv, $tag, $aad);
        if ($ciphertext !== false) {
            return [
                'cipher' => strtoupper($cipher),
                'key_version' => $keyVersion,
                'nonce' => base64_encode($iv),
                'ciphertext' => base64_encode($ciphertext),
                'tag' => base64_encode($tag),
                'aad' => $aad,
            ];
        }
    }

return [
        'cipher' => 'BASE64_FALLBACK',
        'key_version' => $keyVersion,
        'nonce' => base64_encode(random_bytes(8)),
        'ciphertext' => base64_encode($plaintext),
        'tag' => '',
        'aad' => json_encode(['warning' => 'openssl unavailable'], JSON_UNESCAPED_SLASHES),
    ];
}

function connlink_extract_functions(string $code): array
{
    $functions = [];
    if (preg_match_all('/function\s+([a-zA-Z_][a-zA-Z0-9_]*)\s*\(/', $code, $matches)) {
        $functions = array_values(array_unique($matches[1]));
    }
    return $functions;
}

function connlink_extract_classes(string $code): array
{
    $classes = [];
    if (preg_match_all('/class\s+([a-zA-Z_][a-zA-Z0-9_]*)/', $code, $matches)) {
        $classes = array_values(array_unique($matches[1]));
    }
    return $classes;
}

function connlink_extract_includes(string $code): array
{
    $includes = [];
    if (preg_match_all('/(?:require|include)(?:_once)?\s*[\(\s]*["\']([^"\']+)["\']/', $code, $matches)) {
        $includes = array_values(array_unique($matches[1]));
    }
    return $includes;
}

function connlink_guess_file_role(string $path): string
{
    $lower = strtolower(basename($path));
    return match (true) {
        str_contains($lower, 'config') => 'configuration',
        str_contains($lower, 'auth') => 'authentication',
        str_contains($lower, 'feed') => 'feed_rendering',
        str_contains($lower, 'encrypt') => 'encryption',
        str_contains($lower, 'memory') => 'memory',
        str_contains($lower, 'scan') => 'scanner',
        str_contains($lower, 'map') => 'mapper',
        str_contains($lower, 'predict') => 'prediction',
        str_contains($lower, 'recommend') => 'recommendation',
        default => 'general',
    };
}

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