Maildir.php 11.8 KB
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412
<?php
/**
 * @see       https://github.com/zendframework/zend-mail for the canonical source repository
 * @copyright Copyright (c) 2005-2018 Zend Technologies USA Inc. (https://www.zend.com)
 * @license   https://github.com/zendframework/zend-mail/blob/master/LICENSE.md New BSD License
 */

namespace Zend\Mail\Storage;

use Zend\Mail;
use Zend\Stdlib\ErrorHandler;

class Maildir extends AbstractStorage
{
    /**
     * used message class, change it in an extended class to extend the returned message class
     * @var string
     */
    protected $messageClass = '\Zend\Mail\Storage\Message\File';

    /**
     * data of found message files in maildir dir
     * @var array
     */
    protected $files = [];

    /**
     * known flag chars in filenames
     *
     * This list has to be in alphabetical order for setFlags()
     *
     * @var array
     */
    protected static $knownFlags = [
        'D' => Mail\Storage::FLAG_DRAFT,
        'F' => Mail\Storage::FLAG_FLAGGED,
        'P' => Mail\Storage::FLAG_PASSED,
        'R' => Mail\Storage::FLAG_ANSWERED,
        'S' => Mail\Storage::FLAG_SEEN,
        'T' => Mail\Storage::FLAG_DELETED,
    ];

    // TODO: getFlags($id) for fast access if headers are not needed (i.e. just setting flags)?

    /**
     * Count messages all messages in current box
     *
     * @param mixed $flags
     * @return int number of messages
     */
    public function countMessages($flags = null)
    {
        if ($flags === null) {
            return count($this->files);
        }

        $count = 0;
        if (! is_array($flags)) {
            foreach ($this->files as $file) {
                if (isset($file['flaglookup'][$flags])) {
                    ++$count;
                }
            }
            return $count;
        }

        $flags = array_flip($flags);
        foreach ($this->files as $file) {
            foreach ($flags as $flag => $v) {
                if (! isset($file['flaglookup'][$flag])) {
                    continue 2;
                }
            }
            ++$count;
        }
        return $count;
    }

    /**
     * Get one or all fields from file structure. Also checks if message is valid
     *
     * @param  int         $id    message number
     * @param  string|null $field wanted field
     * @throws Exception\InvalidArgumentException
     * @return string|array wanted field or all fields as array
     */
    protected function getFileData($id, $field = null)
    {
        if (! isset($this->files[$id - 1])) {
            throw new Exception\InvalidArgumentException('id does not exist');
        }

        if (! $field) {
            return $this->files[$id - 1];
        }

        if (! isset($this->files[$id - 1][$field])) {
            throw new Exception\InvalidArgumentException('field does not exist');
        }

        return $this->files[$id - 1][$field];
    }

    /**
     * Get a list of messages with number and size
     *
     * @param  int|null $id number of message or null for all messages
     * @return int|array size of given message of list with all messages as array(num => size)
     */
    public function getSize($id = null)
    {
        if ($id !== null) {
            $filedata = $this->getFileData($id);
            return isset($filedata['size']) ? $filedata['size'] : filesize($filedata['filename']);
        }

        $result = [];
        foreach ($this->files as $num => $data) {
            $result[$num + 1] = isset($data['size']) ? $data['size'] : filesize($data['filename']);
        }

        return $result;
    }

    /**
     * Fetch a message
     *
     * @param  int $id number of message
     * @return \Zend\Mail\Storage\Message\File
     * @throws \Zend\Mail\Storage\Exception\ExceptionInterface
     */
    public function getMessage($id)
    {
        // TODO that's ugly, would be better to let the message class decide
        if ($this->messageClass === Message\File::class
            || is_subclass_of($this->messageClass, Message\File::class)
        ) {
            return new $this->messageClass([
                'file'  => $this->getFileData($id, 'filename'),
                'flags' => $this->getFileData($id, 'flags'),
            ]);
        }

        return new $this->messageClass([
            'handler' => $this,
            'id'      => $id,
            'headers' => $this->getRawHeader($id),
            'flags'   => $this->getFileData($id, 'flags'),
        ]);
    }

    /*
     * Get raw header of message or part
     *
     * @param  int               $id       number of message
     * @param  null|array|string $part     path to part or null for message header
     * @param  int               $topLines include this many lines with header (after an empty line)
     * @throws Exception\RuntimeException
     * @return string raw header
     */
    public function getRawHeader($id, $part = null, $topLines = 0)
    {
        if ($part !== null) {
            // TODO: implement
            throw new Exception\RuntimeException('not implemented');
        }

        $fh = fopen($this->getFileData($id, 'filename'), 'r');

        $content = '';
        while (! feof($fh)) {
            $line = fgets($fh);
            if (! trim($line)) {
                break;
            }
            $content .= $line;
        }

        fclose($fh);
        return $content;
    }

    /*
     * Get raw content of message or part
     *
     * @param  int               $id   number of message
     * @param  null|array|string $part path to part or null for message content
     * @throws Exception\RuntimeException
     * @return string raw content
     */
    public function getRawContent($id, $part = null)
    {
        if ($part !== null) {
            // TODO: implement
            throw new Exception\RuntimeException('not implemented');
        }

        $fh = fopen($this->getFileData($id, 'filename'), 'r');

        while (! feof($fh)) {
            $line = fgets($fh);
            if (! trim($line)) {
                break;
            }
        }

        $content = stream_get_contents($fh);
        fclose($fh);
        return $content;
    }

    /**
     * Create instance with parameters
     * Supported parameters are:
     *   - dirname dirname of mbox file
     *
     * @param  $params array mail reader specific parameters
     * @throws Exception\InvalidArgumentException
     */
    public function __construct($params)
    {
        if (is_array($params)) {
            $params = (object) $params;
        }

        if (! isset($params->dirname) || ! is_dir($params->dirname)) {
            throw new Exception\InvalidArgumentException('no valid dirname given in params');
        }

        if (! $this->isMaildir($params->dirname)) {
            throw new Exception\InvalidArgumentException('invalid maildir given');
        }

        $this->has['top'] = true;
        $this->has['flags'] = true;
        $this->openMaildir($params->dirname);
    }

    /**
     * check if a given dir is a valid maildir
     *
     * @param string $dirname name of dir
     * @return bool dir is valid maildir
     */
    protected function isMaildir($dirname)
    {
        if (file_exists($dirname . '/new') && ! is_dir($dirname . '/new')) {
            return false;
        }
        if (file_exists($dirname . '/tmp') && ! is_dir($dirname . '/tmp')) {
            return false;
        }
        return is_dir($dirname . '/cur');
    }

    /**
     * open given dir as current maildir
     *
     * @param string $dirname name of maildir
     * @throws Exception\RuntimeException
     */
    protected function openMaildir($dirname)
    {
        if ($this->files) {
            $this->close();
        }

        ErrorHandler::start(E_WARNING);
        $dh    = opendir($dirname . '/cur/');
        $error = ErrorHandler::stop();
        if (! $dh) {
            throw new Exception\RuntimeException('cannot open maildir', 0, $error);
        }
        $this->getMaildirFiles($dh, $dirname . '/cur/');
        closedir($dh);

        ErrorHandler::start(E_WARNING);
        $dh    = opendir($dirname . '/new/');
        $error = ErrorHandler::stop();
        if (! $dh) {
            throw new Exception\RuntimeException('cannot read recent mails in maildir', 0, $error);
        }

        $this->getMaildirFiles($dh, $dirname . '/new/', [Mail\Storage::FLAG_RECENT]);
        closedir($dh);
    }

    /**
     * find all files in opened dir handle and add to maildir files
     *
     * @param resource $dh            dir handle used for search
     * @param string   $dirname       dirname of dir in $dh
     * @param array    $defaultFlags default flags for given dir
     */
    protected function getMaildirFiles($dh, $dirname, $defaultFlags = [])
    {
        while (($entry = readdir($dh)) !== false) {
            if ($entry[0] == '.' || ! is_file($dirname . $entry)) {
                continue;
            }

            ErrorHandler::start(E_NOTICE);
            list($uniq, $info) = explode(':', $entry, 2);
            list(, $size) = explode(',', $uniq, 2);
            ErrorHandler::stop();
            if ($size && $size[0] == 'S' && $size[1] == '=') {
                $size = substr($size, 2);
            }
            if (! ctype_digit($size)) {
                $size = null;
            }

            ErrorHandler::start(E_NOTICE);
            list($version, $flags) = explode(',', $info, 2);
            ErrorHandler::stop();
            if ($version != 2) {
                $flags = '';
            }

            $namedFlags = $defaultFlags;
            $length = strlen($flags);
            for ($i = 0; $i < $length; ++$i) {
                $flag = $flags[$i];
                $namedFlags[$flag] = isset(static::$knownFlags[$flag]) ? static::$knownFlags[$flag] : $flag;
            }

            $data = [
                'uniq'       => $uniq,
                'flags'      => $namedFlags,
                'flaglookup' => array_flip($namedFlags),
                'filename'   => $dirname . $entry
            ];
            if ($size !== null) {
                $data['size'] = (int) $size;
            }
            $this->files[] = $data;
        }
    }

    /**
     * Close resource for mail lib. If you need to control, when the resource
     * is closed. Otherwise the destructor would call this.
     *
     */
    public function close()
    {
        $this->files = [];
    }

    /**
     * Waste some CPU cycles doing nothing.
     *
     * @return bool always return true
     */
    public function noop()
    {
        return true;
    }

    /**
     * stub for not supported message deletion
     *
     * @param $id
     * @throws Exception\RuntimeException
     */
    public function removeMessage($id)
    {
        throw new Exception\RuntimeException('maildir is (currently) read-only');
    }

    /**
     * get unique id for one or all messages
     *
     * if storage does not support unique ids it's the same as the message number
     *
     * @param int|null $id message number
     * @return array|string message number for given message or all messages as array
     */
    public function getUniqueId($id = null)
    {
        if ($id) {
            return $this->getFileData($id, 'uniq');
        }

        $ids = [];
        foreach ($this->files as $num => $file) {
            $ids[$num + 1] = $file['uniq'];
        }
        return $ids;
    }

    /**
     * get a message number from a unique id
     *
     * I.e. if you have a webmailer that supports deleting messages you should use unique ids
     * as parameter and use this method to translate it to message number right before calling removeMessage()
     *
     * @param string $id unique id
     * @throws Exception\InvalidArgumentException
     * @return int message number
     */
    public function getNumberByUniqueId($id)
    {
        foreach ($this->files as $num => $file) {
            if ($file['uniq'] == $id) {
                return $num + 1;
            }
        }

        throw new Exception\InvalidArgumentException('unique id not found');
    }
}