summaryrefslogtreecommitdiff
path: root/program/include/rcube_message.php
blob: 174b1f314b1e2a1484caadd85ab30c4f3186b152 (plain)
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
<?php

/*
 +-----------------------------------------------------------------------+
 | program/include/rcube_message.php                                     |
 |                                                                       |
 | This file is part of the RoundCube Webmail client                     |
 | Copyright (C) 2008, RoundCube Dev. - Switzerland                      |
 | Licensed under the GNU GPL                                            |
 |                                                                       |
 | PURPOSE:                                                              |
 |   Logical representation of a mail message with all its data          |
 |   and related functions                                               |
 +-----------------------------------------------------------------------+
 | Author: Thomas Bruederli <roundcube@gmail.com>                        |
 +-----------------------------------------------------------------------+

 $Id: rcube_imap.php 1344 2008-04-30 08:21:42Z thomasb $

*/


/**
 * Interface class for accessing an IMAP server
 *
 * This is a wrapper that implements the Iloha IMAP Library (IIL)
 *
 * @package    Mail
 * @author     Thomas Bruederli <roundcube@gmail.com>
 */
class rcube_message
{
  private $app;
  private $imap;
  private $opt = array();
  private $inline_parts = array();
  private $parse_alternative = false;
  
  public $uid = null;
  public $headers;
  public $structure;
  public $parts = array();
  public $mime_parts = array();
  public $attachments = array();
  public $subject = '';
  public $is_safe = false;
  
  
  function __construct($uid)
  {
    $this->app = rcmail::get_instance();
    $this->imap = $this->app->imap;
    
    $this->uid = $uid;
    $this->headers = $this->imap->get_headers($uid);
    $this->subject = rcube_imap::decode_mime_string($this->headers->subject, $this->headers->charset);
    
    $this->is_safe = (intval($_GET['_safe']) || $_SESSION['safe_messages'][$uid]) ? true : false;
    $_SESSION['safe_messages'][$uid] = $this->is_safe;
    
    $this->opt = array(
      'safe' => $this->is_safe,
      'prefer_html' => $this->app->config->get('prefer_html'),
      'get_url' => rcmail_url('get', array('_mbox' => $this->imap->get_mailbox_name(), '_uid' => $uid))
    );
    
    if ($this->structure = $this->imap->get_structure($uid)) {
      $this->parse_structure($this->structure);
      $this->get_mime_numbers($this->structure);
    }
    else {
      $this->body = $this->imap->get_body($uid);
    }
  }
  
  
  /**
   * Return a (decoded) message header
   *
   * @param string Header name
   * @param bool   Don't mime-decode the value
   * @return string Header value
   */
  public function get_header($name, $raw = false)
  {
    $value = $this->header->$name;
    return $raw ? $value : $this->imap->decode_header($value);
  }
  
  
  /**
   * Compose a valid URL for getting a message part
   *
   * @param string Part MIME-ID
   * @return string URL or false if part does not exist
   */
  public function get_part_url($mime_id)
  {
    if ($this->mime_parts[$mime_id])
      return $this->opt['get_url'] . "&_part=" . $mime_id;
    else
      return false;
  }
  
  
  /**
   * Get content of a specific part of this message
   *
   * @param string Part MIME-ID
   * @return string Part content
   */
  public function get_part_content($mime_id)
  {
    if ($part = $this->mime_parts[$mime_id])
      return $this->imap->get_message_part($this->uid, $mime_id, $part);
    else
      return null;
  }
  
  
  /**
   * Determine if the message contains a HTML part
   *
   * @return bool True if a HTML is available, False if not
   */
  function has_html_part()
  {
     // check all message parts
     foreach ($this->parts as $pid => $part) {
        $mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
        if ($mimetype == 'text/html')
           return true;
     }

     return false;
  }

  /**
   * Return the first HTML part of this message
   *
   * @return string HTML message part content
   */
  function first_html_part()
    {
    $html_part = null;

    // check all message parts
    foreach ($this->mime_parts as $mime_id => $part) {
      $mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);
      if ($mimetype == 'text/html') {
        $html_part = $this->imap->get_message_part($this->uid, $mime_id, $part);
      }
    }

    return $html_part;
  }


  /**
   * Return the first text part of this message
   *
   * @return string Plain text message/part content
   */
  function first_text_part()
    {
    // no message structure, return complete body
    if (empty($this->parts))
      return $this->body;
      
    $out = null;

    // check all message parts
    foreach ($this->mime_parts as $mime_id => $part) {
      $mimetype = strtolower($part->ctype_primary . '/' . $part->ctype_secondary);

      if ($mimetype == 'text/plain') {
        $out = $this->imap->get_message_part($this->uid, $mime_id, $part);
        break;
      }
      else if ($mimetype == 'text/html') {
        $html_part = $this->imap->get_message_part($this->uid, $mime_id, $part);

        // remove special chars encoding
        $trans = array_flip(get_html_translation_table(HTML_ENTITIES));
        $html_part = strtr($html_part, $trans);

        // create instance of html2text class
        $txt = new html2text($html_part);
        $out = $txt->get_text();
        break;
      }
    }

    return $out;
  }


  /**
   * Raad the message structure returend by the IMAP server
   * and build flat lists of content parts and attachments
   *
   * @param object rcube_message_part Message structure node
   * @param bool  True when called recursively
   */
  private function parse_structure($structure, $recursive = false)
  {
    $message_ctype_primary = strtolower($structure->ctype_primary);
    $message_ctype_secondary = strtolower($structure->ctype_secondary);

    // show message headers
    if ($recursive && is_array($structure->headers) && isset($structure->headers['subject'])) {
      $c = new stdClass;
      $c->type = 'headers';
      $c->headers = &$structure->headers;
      $this->parts[] = $c;
    }

    // print body if message doesn't have multiple parts
    if ($message_ctype_primary == 'text' && !$recursive) {
      $structure->type = 'content';
      $this->parts[] = &$structure;
    }
    // message contains alternative parts
    else if ($message_ctype_primary == 'multipart' && ($message_ctype_secondary == 'alternative') && is_array($structure->parts)) {
      // get html/plaintext parts
      $plain_part = $html_part = $print_part = $related_part = null;

      foreach ($structure->parts as $p => $sub_part) {
        $rel_parts = $attachmnts = null;
        $sub_ctype_primary = strtolower($sub_part->ctype_primary);
        $sub_ctype_secondary = strtolower($sub_part->ctype_secondary);
        
        // check if sub part is 
        if ($sub_ctype_primary=='text' && $sub_ctype_secondary=='plain')
          $plain_part = $p;
        else if ($sub_ctype_primary=='text' && $sub_ctype_secondary=='html')
          $html_part = $p;
        else if ($sub_ctype_primary=='text' && $sub_ctype_secondary=='enriched')
          $enriched_part = $p;
        else if ($sub_ctype_primary=='multipart' && ($sub_ctype_secondary=='related' || $sub_ctype_secondary=='mixed'))
          $related_part = $p;
      }

      // parse related part (alternative part could be in here)
      if ($related_part !== null && !$this->parse_alternative) {
        $this->parse_alternative = true;
        $this->parse_structure($structure->parts[$related_part], true);
        $this->parse_alternative = false;
        
        // if plain part was found, we should unset it if html is preferred
        if ($this->opt['prefer_html'] && count($this->parts))
          $plain_part = null;
      }

      // choose html/plain part to print
      if ($html_part !== null && $this->opt['prefer_html']) {
        $print_part = &$structure->parts[$html_part];
      }
      else if ($enriched_part !== null) {
        $print_part = &$structure->parts[$enriched_part];
      }
      else if ($plain_part !== null) {
        $print_part = &$structure->parts[$plain_part];
      }

      // add the right message body
      if (is_object($print_part)) {
        $print_part->type = 'content';
        $this->parts[] = $print_part;
      }
      // show plaintext warning
      else if ($html_part !== nullL && empty($this->parts)) {
        $c = new stdClass;
        $c->type = 'content';
        $c->body = rcube_label('htmlmessage');
        $c->ctype_primary = 'text';
        $c->ctype_secondary = 'plain';

        $this->parts[] = $c;
      }

      // add html part as attachment
      if ($html_part !== null && $structure->parts[$html_part] !== $print_part) {
        $html_part = &$structure->parts[$html_part];
        $html_part->filename = rcube_label('htmlmessage');
        $html_part->mimetype = 'text/html';

        $this->attachments[] = $html_part;
      }
    }
    // this is an ecrypted message -> create a plaintext body with the according message
    else if ($message_ctype_primary == 'multipart' && $message_ctype_secondary == 'encrypted') {
      $p = new stdClass;
      $p->type = 'content';
      $p->ctype_primary = 'text';
      $p->ctype_secondary = 'plain';
      $p->body = rcube_label('encryptedmessage');
      
      $this->parts[] = $p;
    }
    // message contains multiple parts
    else if (is_array($structure->parts) && !empty($structure->parts)) {
      // iterate over parts
      for ($i=0; $i < count($structure->parts); $i++) {
        $mail_part = &$structure->parts[$i];
        $primary_type = strtolower($mail_part->ctype_primary);
        $secondary_type = strtolower($mail_part->ctype_secondary);

        // multipart/alternative
        if ($primary_type=='multipart') {
          $this->parse_structure($mail_part, true);
        }
        // part text/[plain|html] OR message/delivery-status
        else if (($primary_type == 'text' && ($secondary_type == 'plain' || $secondary_type == 'html') && $mail_part->disposition != 'attachment') ||
                 ($primary_type == 'message' && ($secondary_type == 'delivery-status' || $secondary_type == 'disposition-notification'))) {
          
          // add text part if we're not in alternative mode or if it matches the prefs
          if (!$this->parse_alternative ||
              ($secondary_type == 'html' && $this->opt['prefer_html']) ||
              ($secondary_type == 'plain' && !$this->opt['prefer_html'])) {
            $mail_part->type = 'content';
            $this->parts[] = $mail_part;
          }
          
          // list as attachment as well
          if (!empty($mail_part->filename))
            $this->attachments[] = $mail_part;
        }
        // part message/*
        else if ($primary_type=='message') {
          $this->parse_structure($mail_part, true);
        }
        // ignore "virtual" protocol parts
        else if ($primary_type == 'protocol')
          continue;

        // part is file/attachment
        else if ($mail_part->disposition == 'attachment' || $mail_part->disposition == 'inline' ||
                 $mail_part->headers['content-id'] || (empty($mail_part->disposition) && $mail_part->filename)) {
          // skip apple resource forks
          if ($message_ctype_secondary == 'appledouble' && $secondary_type == 'applefile')
            continue;

          // part belongs to a related message
          if ($message_ctype_secondary == 'related' && $mail_part->headers['content-id']) {
            $mail_part->content_id = preg_replace(array('/^</', '/>$/'), '', $mail_part->headers['content-id']);
            $this->inline_parts[] = $mail_part;
          }
          // is regular attachment
          else {
            if (!$mail_part->filename)
              $mail_part->filename = 'Part '.$mail_part->mime_id;
            $this->attachments[] = $mail_part;
          }
        }
      }

      // if this was a related part try to resolve references
      if ($message_ctype_secondary == 'related' && sizeof($this->inline_objects)) {
        $a_replaces = array();

        foreach ($this->inline_parts as $inline_object) {
          $a_replaces['cid:'.$inline_object->content_id] = htmlspecialchars(sprintf($this->opt['get_url'], $inline_object->mime_id));
        }

        // add replace array to each content part
        // (will be applied later when part body is available)
        for ($i=0; $i<count($a_return_parts); $i++) {
          if ($a_return_parts[$i]->type=='content')
            $a_return_parts[$i]->replaces = $a_replaces;
        }
      }
    }

    // message is single part non-text
    else if ($structure->filename) {
      $this->attachments[] = $structure;
    }
  }


  /**
   * Fill aflat array with references to all parts, indexed by part numbers
   *
   * @param object rcube_message_part Message body structure
   */
  private function get_mime_numbers(&$part)
  {
    if (strlen($part->mime_id))
      $this->mime_parts[$part->mime_id] = &$part;
      
    if (is_array($part->parts))
      for ($i=0; $i<count($part->parts); $i++)
        $this->get_mime_numbers($part->parts[$i]);
  }


}