<?php
/*************************************************************
# 076 License

Copyright (c) テクニカル諏訪子

Permission is hereby granted to any person obtaining a copy of the software
Little Beast (the "Software") to use, modify, merge, copy, publish, distribute,
sublicense, and/or sell copies of the Software, subject to the following conditions:

    1. **Origin Attribution**:
       - You must not misrepresent the origin of the Software; you must not claim
         you created the original Software.
       - If the Software is used in a product, you must either:
         a. Provide clear attribution in the product's documentation, user interface,
            or other visible areas, **OR**
         b. Pay the original developers a fee they specify in writing.
    2. **Usage Restriction**:
       - The Software, or any derivative works, dependencies, or libraries
         incorporating it, must not be used for censorship or to suppress freedom of
         speech, expression, or creativity. Prohibited uses include, but are not
         limited to:
         - Censorship of so-called "hate speech", visuals, non-mainstream opinions,
           ideas, or objective reality.
         - Tools or systems designed to restrict access to information or
           artistic works.
    3. **Notice Preservation**:
       - This license and the above copyright notice must remain intact in all copies
         of the source code.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS FOR A
PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF
CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE
OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 */
namespace Std\Test;

require_once __DIR__.'/../../../autoload.php';

use Std\Lib\Tester;
use Std\Lib\Mailer;
use Std\Test\Helper\MockServer;
use Std\Test\Helper\TestCert;

$test = new Tester([
  'colorOutput' => true,
  'verboseOutput' => true
]);

$test->describe('メーラー（偽物のSMTPサーバー）', function($test): void {
  $log = tempnam(sys_get_temp_dir(), 'lbsmtp_');
  $srv = MockServer::start('smtp-server.php', [$log]);
  if ($srv === null) {
    $test->skipAll('偽物のサーバーを起動出来ない（proc_openが無効？）');
  }

  $info = fn() => ['host' => '127.0.0.1', 'port' => $srv->port, 'user' => 'me@076.moe', 'pass' => 'ひみつ', 'from' => 'me@076.moe'];
  $send = function(callable $fn) use ($info, $log): string {
    file_put_contents($log, '');
    $mail = new Mailer($info());
    $mail->connect();
    try {
      $mail->authenticate();
      $fn($mail);
    } finally {
      $mail->disconnect();
    }
    return (string)file_get_contents($log);
  };

  $test->it('MAILER_ENABLEDが無効なら設定なしで作れないはず', function($test): void {
    if (MAILER_ENABLED) {
      $test->assertNotNull(new Mailer());
      return;
    }
    $test->assertThrows(fn() => new Mailer(), \Exception::class);
  });

  $test->it('認証してメールを送れるはず', function($test) use ($send): void {
    $out = $send(fn($m) => $m->send('you@example.com', 'テスト件名', "こんにちは\n2行目", 'あなた'));

    $test->assertStringContains("C: AUTH LOGIN\r\n", $out);
    $test->assertStringContains('C: '.base64_encode('me@076.moe')."\r\n", $out);
    $test->assertStringContains('C: '.base64_encode('ひみつ')."\r\n", $out);
    $test->assertStringContains("C: MAIL FROM: <me@076.moe>\r\n", $out);
    $test->assertStringContains("C: RCPT TO: <you@example.com>\r\n", $out);
    $test->assertStringContains("C: QUIT\r\n", $out);

    $test->assertStringContains('Subject: '.mb_encode_mimeheader('テスト件名', 'UTF-8', 'Q'), $out);
    $test->assertStringContains('To: '.mb_encode_mimeheader('あなた', 'UTF-8', 'Q').' <you@example.com>', $out);
    $test->assertTrue((bool)preg_match('/^Message-ID: <[0-9a-f]{32}@076\.moe>\r$/m', $out), 'Message-IDが無い');
    $test->assertStringContains('Content-Transfer-Encoding: quoted-printable', $out);
  });

  $test->it('EHLOでは自分のホスト名を名乗るはず', function($test) use ($send): void {
    $out = $send(fn($m) => $m->send('you@example.com', 'x', 'x'));
    $test->assertStringContains('C: EHLO '.(gethostname() ?: 'localhost')."\r\n", $out);
    $test->assertFalse(str_contains($out, 'C: EHLO 127.0.0.1'));
  });

  $test->it('本文をquoted-printableでエンコードし、改行をCRLFに揃えるはず', function($test) use ($send): void {
    $out = $send(fn($m) => $m->send('you@example.com', 'x', "日本語\n二行目"));
    preg_match("/\r\n\r\n(.*)END DATA/s", $out, $m);
    $body = quoted_printable_decode($m[1] ?? '');
    $test->assertEquals("日本語\r\n二行目\r\n", $body);
  });

  $test->it('「.」で始まる行をドットスタッフィングするはず', function($test) use ($send): void {
    // 以前は「.」だけの行で本文が途中で終わった
    $out = $send(fn($m) => $m->send('you@example.com', 'x', "前\n.\n.後ろ\n終わり"));
    $test->assertStringContains("\r\n..\r\n..=E5=BE=8C", $out);
    $test->assertStringContains('終わり', quoted_printable_decode($out));
  });

  $test->it('ヘッダー注入を拒否するはず', function($test) use ($info): void {
    $mail = new Mailer($info());
    $mail->connect();
    try {
      $test->assertThrows(fn() => $mail->send("you@example.com>\r\nRCPT TO: <evil@example.com", 'x', 'x'), \InvalidArgumentException::class);
      $test->assertThrows(fn() => $mail->send('you@example.com', "件名\r\nBcc: evil@example.com", 'x'), \InvalidArgumentException::class);
      $test->assertThrows(fn() => $mail->send('you@example.com', 'x', 'x', "名前\nBcc: x"), \InvalidArgumentException::class);
      $test->assertThrows(fn() => $mail->send('not-an-address', 'x', 'x'), \InvalidArgumentException::class);
    } finally {
      $mail->disconnect();
    }
  });

  $test->it('拒否された宛先は例外になるはず', function($test) use ($send): void {
    $test->assertThrows(fn() => $send(fn($m) => $m->send('reject@example.com', 'x', 'x')), \Exception::class);
  });

  $test->it('接続出来ない場合は例外になるはず', function($test): void {
    $probe = stream_socket_server('tcp://127.0.0.1:0');
    $port = (int)substr(strrchr(stream_socket_get_name($probe, false), ':'), 1);
    fclose($probe);
    $mail = new Mailer(['host' => '127.0.0.1', 'port' => $port, 'from' => 'me@076.moe']);
    $test->assertThrows(fn() => $mail->connect(), \Exception::class);
  });

  $srv?->stop();
  @unlink($log);
});

$test->describe('メーラー（STARTTLS、PHP純正のTLS 1.3）', function($test): void {
  $cert = TestCert::get('ec');
  $log = tempnam(sys_get_temp_dir(), 'lbsmtp_');
  $srv = MockServer::start('smtp-server.php', [$log, $cert['cert'], $cert['key']]);
  if ($srv === null) {
    $test->skipAll('偽物のサーバーを起動出来ない（proc_openが無効？）');
    return;
  }
  $info = fn(array $tls) => ['host' => 'localhost', 'port' => $srv->port, 'user' => 'me@076.moe', 'pass' => 'ひみつ', 'from' => 'me@076.moe', 'tls' => $tls];

  $test->it('STARTTLSの後に認証して送れるはず', function($test) use ($info, $log, $cert): void {
    file_put_contents($log, '');
    $mail = new Mailer($info(['cafile' => $cert['ca']]));
    $mail->connect();
    try {
      $mail->authenticate();
      $mail->send('you@example.com', '暗号化', '本文');
    } finally {
      $mail->disconnect();
    }
    $out = (string)file_get_contents($log);
    $test->assertStringContains("C: STARTTLS\r\n", $out);
    $test->assertStringContains('TLS: TLS_', $out);
    // パスワードはTLSの後に送る
    $test->assertTrue(strpos($out, 'TLS: TLS_') < strpos($out, 'C: '.base64_encode('ひみつ')));
    $test->assertStringContains("C: QUIT\r\n", $out);
  });

  $test->it('信頼出来ない証明書なら認証せずに例外になるはず', function($test) use ($info, $log): void {
    file_put_contents($log, '');
    $mail = new Mailer($info(['cafile' => TestCert::get('self')['cert']]));
    $mail->connect();
    try {
      $test->assertThrows(fn() => $mail->authenticate(), \Exception::class);
    } finally {
      $mail->disconnect();
    }
    $test->assertFalse(str_contains((string)file_get_contents($log), base64_encode('ひみつ')));
  });

  $srv->stop();
  @unlink($log);
});

$test->printSummary();