git.maemo.org Git - modest/blob - src/modest-tny-msg.c

   1 /* Copyright (c) 2006, Nokia Corporation
   2  * All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions are
   6  * met:
   7  *
   8  * * Redistributions of source code must retain the above copyright
   9  *   notice, this list of conditions and the following disclaimer.
  10  * * Redistributions in binary form must reproduce the above copyright
  11  *   notice, this list of conditions and the following disclaimer in the
  12  *   documentation and/or other materials provided with the distribution.
  13  * * Neither the name of the Nokia Corporation nor the names of its
  14  *   contributors may be used to endorse or promote products derived from
  15  *   this software without specific prior written permission.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
  18  * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  19  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
  20  * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
  21  * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
  22  * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
  23  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
  24  * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
  25  * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
  26  * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
  27  * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  28  */
  29
  30 #include <string.h>
  31 #include <gtkhtml/gtkhtml.h>
  32 #include <tny-gtk-text-buffer-stream.h>
  33 #include <tny-simple-list.h>
  34 #include <tny-folder.h>
  35 #include <modest-runtime.h>
  36 #include "modest-formatter.h"
  37 #include <tny-camel-mem-stream.h>
  38 #include <tny-camel-mime-part.h>
  39 #include <glib/gprintf.h>
  40 #include <modest-tny-folder.h>
  41 #include "modest-tny-mime-part.h"
  42
  43
  44 #ifdef HAVE_CONFIG_H
  45 #include <config.h>
  46 #endif /*HAVE_CONFIG_H */
  47
  48 #include <modest-tny-msg.h>
  49 #include "modest-text-utils.h"
  50
  51 static TnyMimePart * add_body_part (TnyMsg *msg, const gchar *body,
  52                                     const gchar *content_type);
  53 static TnyMimePart * add_html_body_part (TnyMsg *msg, const gchar *body);
  54 static void add_attachments (TnyMimePart *part, GList *attachments_list, gboolean add_inline);
  55 static void add_images (TnyMsg *msg, GList *attachments_list);
  56 static char * get_content_type(const gchar *s);
  57 static gboolean is_ascii(const gchar *s);
  58
  59
  60 TnyMsg*
  61 modest_tny_msg_new (const gchar* mailto, const gchar* from, const gchar *cc,
  62                     const gchar *bcc, const gchar* subject, const gchar *body,
  63                     GList *attachments)
  64 {
  65         TnyMsg *new_msg;
  66         TnyHeader *header;
  67         gchar *content_type;
  68
  69         /* Create new msg */
  70         new_msg = modest_formatter_create_message (NULL, TRUE, (attachments != NULL), FALSE);
  71         header  = tny_msg_get_header (new_msg);
  72
  73         if ((from != NULL) && (strlen(from) > 0)) {
  74                 tny_header_set_from (TNY_HEADER (header), from);
  75                 tny_header_set_replyto (TNY_HEADER (header), from);
  76         }
  77         if ((mailto != NULL) && (strlen(mailto) > 0))
  78                 tny_header_set_to (TNY_HEADER (header), mailto);
  79         if ((cc != NULL) && (strlen(cc) > 0))
  80                 tny_header_set_cc (TNY_HEADER (header), cc);
  81         if ((bcc != NULL) && (strlen(bcc) > 0))
  82                 tny_header_set_bcc (TNY_HEADER (header), bcc);
  83
  84         if ((subject != NULL) && (strlen(subject) > 0))
  85                 tny_header_set_subject (TNY_HEADER (header), subject);
  86
  87         content_type = get_content_type(body);
  88
  89         /* set modest as the X-Mailer
  90          * we could this in the platform factory, but then the header
  91          * would show up before all the others.
  92          */
  93         tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "X-Mailer", "Modest "
  94                                        VERSION);
  95
  96         /* Add the body of the new mail */
  97         /* This is needed even if body is NULL or empty. */
  98         add_body_part (new_msg, body, content_type);
  99         g_free (content_type);
 100
 101         /* Add attachments */
 102         if (attachments)
 103                 add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE);
 104         if (header)
 105                 g_object_unref(header);
 106
 107         return new_msg;
 108 }
 109
 110 TnyMsg*
 111 modest_tny_msg_new_html_plain (const gchar* mailto, const gchar* from, const gchar *cc,
 112                                const gchar *bcc, const gchar* subject,
 113                                const gchar *html_body, const gchar *plain_body,
 114                                GList *attachments, GList *images)
 115 {
 116         TnyMsg *new_msg;
 117         TnyHeader *header;
 118         gchar *content_type;
 119
 120         /* Create new msg */
 121         new_msg = modest_formatter_create_message (NULL, FALSE, (attachments != NULL), (images != NULL));
 122         header  = tny_msg_get_header (new_msg);
 123
 124         if ((from != NULL) && (strlen(from) > 0)) {
 125                 tny_header_set_from (TNY_HEADER (header), from);
 126                 tny_header_set_replyto (TNY_HEADER (header), from);
 127         }
 128         if ((mailto != NULL) && (strlen(mailto) > 0))
 129                 tny_header_set_to (TNY_HEADER (header), mailto);
 130         if ((cc != NULL) && (strlen(cc) > 0))
 131                 tny_header_set_cc (TNY_HEADER (header), cc);
 132         if ((bcc != NULL) && (strlen(bcc) > 0))
 133                 tny_header_set_bcc (TNY_HEADER (header), bcc);
 134
 135         if ((subject != NULL) && (strlen(subject) > 0))
 136                 tny_header_set_subject (TNY_HEADER (header), subject);
 137
 138         content_type = get_content_type(plain_body);
 139
 140         /* set modest as the X-Mailer
 141          * we could this in the platform factory, but then the header
 142          * would show up before all the others.
 143          */
 144         tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "X-Mailer", "Modest "
 145                                        VERSION);
 146
 147         /* Add the body of the new mail */
 148         add_body_part (new_msg, plain_body, content_type);
 149         add_html_body_part (new_msg, html_body);
 150         g_free (content_type);
 151
 152         /* Add attachments */
 153         add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE);
 154         add_images (new_msg, images);
 155         if (header)
 156                 g_object_unref(header);
 157
 158         return new_msg;
 159 }
 160
 161
 162 /* FIXME: this func copy from modest-mail-operation: refactor */
 163 static TnyMimePart *
 164 add_body_part (TnyMsg *msg,
 165                const gchar *body,
 166                const gchar *content_type)
 167 {
 168         TnyMimePart *text_body_part = NULL;
 169         TnyStream *text_body_stream;
 170
 171         /* Create the stream */
 172         text_body_stream = TNY_STREAM (tny_camel_mem_stream_new_with_buffer
 173                                         (body, (body ? strlen(body) : 0)));
 174
 175         text_body_part = modest_formatter_create_body_part (NULL, msg);
 176
 177         /* Construct MIME part */
 178         tny_stream_reset (text_body_stream);
 179         tny_mime_part_construct (text_body_part,
 180                                  text_body_stream,
 181                                  content_type, "7bit");
 182         tny_stream_reset (text_body_stream);
 183
 184         g_object_unref (G_OBJECT(text_body_part));
 185
 186         /* Clean */
 187         g_object_unref (text_body_stream);
 188
 189         return text_body_part;
 190 }
 191
 192 static TnyMimePart *
 193 add_html_body_part (TnyMsg *msg,
 194                     const gchar *body)
 195 {
 196         TnyMimePart *html_body_part = NULL;
 197         TnyStream *html_body_stream;
 198
 199         /* Create the stream */
 200         html_body_stream = TNY_STREAM (tny_camel_mem_stream_new_with_buffer
 201                                         (body, strlen(body)));
 202
 203         /* Create body part if needed */
 204         html_body_part = modest_formatter_create_body_part (NULL, msg);
 205
 206         /* Construct MIME part */
 207         tny_stream_reset (html_body_stream);
 208         tny_mime_part_construct (html_body_part,
 209                                  html_body_stream,
 210                                  "text/html; charset=utf-8",
 211                                  "7bit"); /* Sometimes it might be needed
 212                                              to make this one a 8bit! */
 213         tny_stream_reset (html_body_stream);
 214
 215         g_object_unref (G_OBJECT(html_body_part));
 216
 217         /* Clean */
 218         g_object_unref (html_body_stream);
 219
 220         return html_body_part;
 221 }
 222
 223 static TnyMimePart *
 224 copy_mime_part (TnyMimePart *part)
 225 {
 226         TnyMimePart *result = NULL;
 227         const gchar *attachment_content_type;
 228         const gchar *attachment_filename;
 229         const gchar *attachment_cid;
 230         TnyList *parts;
 231         TnyIterator *iterator;
 232         TnyStream *attachment_stream;
 233         const gchar *enc;
 234
 235         if (TNY_IS_MSG (part)) {
 236                 g_object_ref (part);
 237                 return part;
 238         }
 239
 240         result = tny_platform_factory_new_mime_part (
 241                 modest_runtime_get_platform_factory());
 242
 243         attachment_content_type = tny_mime_part_get_content_type (part);
 244
 245         /* get mime part headers */
 246         attachment_filename = tny_mime_part_get_filename (part);
 247         attachment_cid = tny_mime_part_get_content_id (part);
 248
 249         /* fill the stream */
 250         attachment_stream = tny_mime_part_get_decoded_stream (part);
 251         enc = tny_mime_part_get_transfer_encoding (part);
 252         tny_stream_reset (attachment_stream);
 253         tny_mime_part_construct (result,
 254                                  attachment_stream,
 255                                  attachment_content_type,
 256                                  enc);
 257         tny_stream_reset (attachment_stream);
 258
 259         /* set other mime part fields */
 260         tny_mime_part_set_filename (result, attachment_filename);
 261         tny_mime_part_set_content_id (result, attachment_cid);
 262
 263         /* copy subparts */
 264         parts = tny_simple_list_new ();
 265         tny_mime_part_get_parts (part, parts);
 266         iterator = tny_list_create_iterator (parts);
 267         while (!tny_iterator_is_done (iterator)) {
 268                 TnyMimePart *subpart = TNY_MIME_PART (tny_iterator_get_current (iterator));
 269                 if (subpart) {
 270                         const gchar *subpart_cid;
 271                         TnyMimePart *subpart_copy = copy_mime_part (subpart);
 272                         subpart_cid = tny_mime_part_get_content_id (subpart);
 273                         tny_mime_part_add_part (result, subpart_copy);
 274                         if (subpart_cid)
 275                                 tny_mime_part_set_content_id (result, subpart_cid);
 276                         g_object_unref (subpart);
 277                         g_object_unref (subpart_copy);
 278                 }
 279
 280                 tny_iterator_next (iterator);
 281         }
 282         g_object_unref (iterator);
 283         g_object_unref (parts);
 284         g_object_unref (attachment_stream);
 285
 286         return result;
 287 }
 288
 289 static void
 290 add_attachments (TnyMimePart *part, GList *attachments_list, gboolean add_inline)
 291 {
 292         GList *pos;
 293         TnyMimePart *attachment_part, *old_attachment;
 294
 295         for (pos = (GList *)attachments_list; pos; pos = pos->next) {
 296
 297                 old_attachment = pos->data;
 298                 if (!tny_mime_part_is_purged (old_attachment)) {
 299                         const gchar *old_cid;
 300                         old_cid = tny_mime_part_get_content_id (old_attachment);
 301                         attachment_part = copy_mime_part (old_attachment);
 302                         tny_mime_part_set_header_pair (attachment_part, "Content-Disposition",
 303                                                        add_inline?"inline":"attachment");
 304                         tny_mime_part_set_transfer_encoding (TNY_MIME_PART (attachment_part), "base64");
 305                         tny_mime_part_add_part (TNY_MIME_PART (part), attachment_part);
 306                         if (old_cid)
 307                                 tny_mime_part_set_content_id (attachment_part, old_cid);
 308                         g_object_unref (attachment_part);
 309                 }
 310         }
 311 }
 312
 313 static void
 314 add_images (TnyMsg *msg, GList *images_list)
 315 {
 316         TnyMimePart *related_part = NULL;
 317         const gchar *content_type;
 318
 319         content_type = tny_mime_part_get_content_type (TNY_MIME_PART (msg));
 320
 321         if ((content_type != NULL) && !strcasecmp (content_type, "multipart/related")) {
 322                 related_part = g_object_ref (msg);
 323         } else if ((content_type != NULL) && !strcasecmp (content_type, "multipart/mixed")) {
 324                 TnyList *parts = TNY_LIST (tny_simple_list_new ());
 325                 TnyIterator *iter = NULL;
 326                 tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 327                 iter = tny_list_create_iterator (parts);
 328
 329                 while (!tny_iterator_is_done (iter)) {
 330                         TnyMimePart *part = TNY_MIME_PART (tny_iterator_get_current (iter));
 331                         if (part && !g_strcasecmp (tny_mime_part_get_content_type (part), "multipart/related")) {
 332                                 related_part = part;
 333                                 break;
 334                         } else {
 335                                 g_object_unref (part);
 336                         }
 337                         tny_iterator_next (iter);
 338                 }
 339                 g_object_unref (iter);
 340                 g_object_unref (parts);
 341         }
 342
 343         if (related_part != NULL) {
 344                 /* TODO: attach images in their proper place */
 345                 add_attachments (related_part, images_list, TRUE);
 346                 g_object_unref (related_part);
 347         }
 348 }
 349
 350
 351 gchar *
 352 modest_tny_msg_get_body (TnyMsg *msg, gboolean want_html, gboolean *is_html)
 353 {
 354         TnyStream *stream;
 355         TnyMimePart *body;
 356         GtkTextBuffer *buf;
 357         GtkTextIter start, end;
 358         gchar *to_quote;
 359         gboolean result_was_html = TRUE;
 360
 361         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 362
 363         body = modest_tny_msg_find_body_part(msg, want_html);
 364         if (!body)
 365                 return NULL;
 366
 367         buf = gtk_text_buffer_new (NULL);
 368         stream = TNY_STREAM (tny_gtk_text_buffer_stream_new (buf));
 369         tny_stream_reset (stream);
 370         tny_mime_part_decode_to_stream (body, stream, NULL);
 371         tny_stream_reset (stream);
 372
 373         gtk_text_buffer_get_bounds (buf, &start, &end);
 374         to_quote = gtk_text_buffer_get_text (buf, &start, &end, FALSE);
 375         if (tny_mime_part_content_type_is (body, "text/plain")) {
 376                 gchar *to_quote_converted = modest_text_utils_convert_to_html (to_quote);
 377                 g_free (to_quote);
 378                 to_quote = to_quote_converted;
 379                 result_was_html = FALSE;
 380         }
 381
 382         g_object_unref (buf);
 383         g_object_unref (G_OBJECT(stream));
 384         g_object_unref (G_OBJECT(body));
 385
 386         if (is_html != NULL)
 387                 *is_html = result_was_html;
 388
 389         return to_quote;
 390 }
 391
 392
 393 TnyMimePart*
 394 modest_tny_msg_find_body_part_from_mime_part (TnyMimePart *msg, gboolean want_html)
 395 {
 396         const gchar *desired_mime_type = want_html ? "text/html" : "text/plain";
 397         TnyMimePart *part = NULL;
 398         TnyList *parts = NULL;
 399         TnyIterator *iter = NULL;
 400         gchar *header_content_type;
 401         gchar *header_content_type_lower;
 402
 403         if (!msg)
 404                 return NULL;
 405
 406         /* If it's an application multipart, then we don't get into as we don't
 407          * support them (for example application/sml or wap messages */
 408         header_content_type = modest_tny_mime_part_get_header_value (msg, "Content-Type");
 409         header_content_type = g_strstrip (header_content_type);
 410         header_content_type_lower = header_content_type?g_ascii_strdown (header_content_type, -1):NULL;
 411         if (header_content_type_lower &&
 412             g_str_has_prefix (header_content_type_lower, "multipart/") &&
 413             strstr (header_content_type_lower, "application/")) {
 414                 g_free (header_content_type_lower);
 415                 g_free (header_content_type);
 416                 return NULL;
 417         }
 418         g_free (header_content_type_lower);
 419         g_free (header_content_type);
 420
 421         parts = TNY_LIST (tny_simple_list_new());
 422         tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 423
 424         iter  = tny_list_create_iterator(parts);
 425
 426         /* no parts? assume it's single-part message */
 427         if (tny_iterator_is_done(iter)) {
 428                 const gchar *content_type;
 429                 g_object_unref (G_OBJECT(iter));
 430                 content_type = tny_mime_part_get_content_type (msg);
 431                 /* if this part cannot be a supported body return NULL */
 432                 if (!g_str_has_prefix (content_type, "text/")) {
 433                         return NULL;
 434                 } else {
 435                         return TNY_MIME_PART (g_object_ref(G_OBJECT(msg)));
 436                 }
 437         } else {
 438                 do {
 439                         gchar *tmp, *content_type = NULL;
 440                         gboolean has_content_disp_name = FALSE;
 441
 442                         part = TNY_MIME_PART(tny_iterator_get_current (iter));
 443
 444                         if (!part) {
 445                                 g_warning ("%s: not a valid mime part", __FUNCTION__);
 446                                 continue;
 447                         }
 448
 449                         /* it's a message --> ignore */
 450                         if (part && TNY_IS_MSG (part)) {
 451                                 g_object_unref (part);
 452                                 tny_iterator_next (iter);
 453                                 continue;
 454                         }
 455
 456                         /* we need to strdown the content type, because
 457                          * tny_mime_part_has_content_type does not do it...
 458                          */
 459                         content_type = g_ascii_strdown (tny_mime_part_get_content_type (part), -1);
 460
 461                         /* mime-parts with a content-disposition header (either 'inline' or 'attachment')
 462                          * and a 'name=' thingy cannot be body parts
 463                          */
 464
 465                         tmp = modest_tny_mime_part_get_header_value (part, "Content-Disposition");
 466                         if (tmp) {
 467                                 gchar *content_disp = g_ascii_strdown(tmp, -1);
 468                                 g_free (tmp);
 469                                 has_content_disp_name = g_strstr_len (content_disp, strlen(content_disp), "name=") != NULL;
 470                                 g_free (content_disp);
 471                         }
 472
 473                         if (g_str_has_prefix (content_type, desired_mime_type) && !has_content_disp_name) {
 474                                 /* we found the desired mime-type! */
 475                                 g_free (content_type);
 476                                 break;
 477
 478                         } else  if (g_str_has_prefix(content_type, "multipart")) {
 479
 480                                 /* multipart? recurse! */
 481                                 g_object_unref (part);
 482                                 g_free (content_type);
 483                                 part = modest_tny_msg_find_body_part_from_mime_part (part, want_html);
 484                                 if (part)
 485                                         break;
 486                         } else
 487                                 g_free (content_type);
 488
 489                         if (part) {
 490                                 g_object_unref (G_OBJECT(part));
 491                                 part = NULL;
 492                         }
 493
 494                         tny_iterator_next (iter);
 495
 496                 } while (!tny_iterator_is_done(iter));
 497         }
 498
 499         g_object_unref (G_OBJECT(iter));
 500         g_object_unref (G_OBJECT(parts));
 501
 502         /* if were trying to find an HTML part and couldn't find it,
 503          * try to find a text/plain part instead
 504          */
 505         if (!part && want_html)
 506                 return modest_tny_msg_find_body_part_from_mime_part (msg, FALSE);
 507         else
 508                 return part; /* this maybe NULL, this is not an error; some message just don't have a body
 509                               * part */
 510 }
 511
 512
 513 TnyMimePart*
 514 modest_tny_msg_find_body_part (TnyMsg *msg, gboolean want_html)
 515 {
 516         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 517
 518         return modest_tny_msg_find_body_part_from_mime_part (TNY_MIME_PART(msg),
 519                                                              want_html);
 520 }
 521
 522
 523 #define MODEST_TNY_MSG_PARENT_UID "parent-uid"
 524
 525 static TnyMsg *
 526 create_reply_forward_mail (TnyMsg *msg, TnyHeader *header, const gchar *from,
 527                            const gchar *signature, gboolean is_reply,
 528                            guint type /*ignored*/, GList *attachments)
 529 {
 530         TnyMsg *new_msg;
 531         TnyHeader *new_header;
 532         gchar *new_subject;
 533         TnyMimePart *body = NULL;
 534         ModestFormatter *formatter;
 535         gchar *subject_prefix;
 536         gboolean no_text_part;
 537
 538         if (header)
 539                 g_object_ref (header);
 540         else
 541                 header = tny_msg_get_header (msg);
 542
 543         /* Get body from original msg. Always look for the text/plain
 544            part of the message to create the reply/forwarded mail */
 545         if (msg != NULL)
 546                 body   = modest_tny_msg_find_body_part (msg, FALSE);
 547
 548         if (modest_conf_get_bool (modest_runtime_get_conf (), MODEST_CONF_PREFER_FORMATTED_TEXT,
 549                                   NULL))
 550                 formatter = modest_formatter_new ("text/html", signature);
 551         else
 552                 formatter = modest_formatter_new ("text/plain", signature);
 553
 554
 555         /* if we don't have a text-part */
 556         no_text_part = (!body) || (strcmp (tny_mime_part_get_content_type (body), "text/html")==0);
 557
 558         /* when we're reply, include the text part if we have it, or nothing otherwise. */
 559         if (is_reply)
 560                 new_msg = modest_formatter_quote  (formatter, no_text_part ? NULL: body, header,
 561                                                     attachments);
 562         else {
 563                 /* for attachements; inline if there is a text part, and include the
 564                  * full old mail if there was none */
 565                 if (no_text_part) {
 566                         new_msg = modest_formatter_attach (formatter, msg, header);
 567                 } else {
 568                         new_msg = modest_formatter_inline  (formatter, body, header,
 569                                                             attachments);
 570                 }
 571         }
 572
 573         g_object_unref (G_OBJECT(formatter));
 574         if (body)
 575                 g_object_unref (G_OBJECT(body));
 576
 577         /* Fill the header */
 578         new_header = tny_msg_get_header (new_msg);
 579         tny_header_set_from (new_header, from);
 580         tny_header_set_replyto (new_header, from);
 581
 582         /* Change the subject */
 583         if (is_reply)
 584                 subject_prefix = g_strconcat (_("mail_va_re"), ":", NULL);
 585         else
 586                 subject_prefix = g_strconcat (_("mail_va_fw"), ":", NULL);
 587         new_subject =
 588                 (gchar *) modest_text_utils_derived_subject (tny_header_get_subject(header),
 589                                                              subject_prefix);
 590         g_free (subject_prefix);
 591         tny_header_set_subject (new_header, (const gchar *) new_subject);
 592         g_free (new_subject);
 593
 594         /* get the parent uid, and set it as a gobject property on the new msg */
 595         if (new_msg) {
 596                 gchar* parent_uid = modest_tny_folder_get_header_unique_id (header);
 597                 g_object_set_data_full (G_OBJECT(new_msg), MODEST_TNY_MSG_PARENT_UID,
 598                                         parent_uid, g_free);
 599         }
 600
 601         /* set modest as the X-Mailer
 602          * we could this in the platform factory, but then the header
 603          * would show up before all the others.
 604          */
 605         tny_mime_part_set_header_pair (TNY_MIME_PART (msg), "X-Mailer", "Modest "
 606                                        VERSION);
 607
 608         /* Clean */
 609         g_object_unref (G_OBJECT (new_header));
 610         g_object_unref (G_OBJECT (header));
 611         /* ugly to unref it here instead of in the calling func */
 612
 613         if (!is_reply & !no_text_part) {
 614                 add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE);
 615         }
 616
 617         return new_msg;
 618 }
 619
 620 const gchar*
 621 modest_tny_msg_get_parent_uid (TnyMsg *msg)
 622 {
 623         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 624
 625         return g_object_get_data (G_OBJECT(msg), MODEST_TNY_MSG_PARENT_UID);
 626 }
 627
 628
 629
 630 static void
 631 add_if_attachment (gpointer data, gpointer user_data)
 632 {
 633         TnyMimePart *part;
 634         GList **attachments_list;
 635
 636         part = TNY_MIME_PART (data);
 637         attachments_list = ((GList **) user_data);
 638
 639         if ((tny_mime_part_is_attachment (part))||(TNY_IS_MSG (part))) {
 640                 *attachments_list = g_list_prepend (*attachments_list, part);
 641                 g_object_ref (part);
 642         }
 643 }
 644
 645 TnyMsg*
 646 modest_tny_msg_create_forward_msg (TnyMsg *msg,
 647                                    const gchar *from,
 648                                    const gchar *signature,
 649                                    ModestTnyMsgForwardType forward_type)
 650 {
 651         TnyMsg *new_msg;
 652         TnyList *parts = NULL;
 653         GList *attachments_list = NULL;
 654
 655         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 656
 657         /* Add attachments */
 658         parts = TNY_LIST (tny_simple_list_new());
 659         tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 660         tny_list_foreach (parts, add_if_attachment, &attachments_list);
 661
 662         new_msg = create_reply_forward_mail (msg, NULL, from, signature, FALSE, forward_type,
 663                                              attachments_list);
 664
 665         /* Clean */
 666         if (attachments_list) {
 667                 g_list_foreach (attachments_list, (GFunc) g_object_unref, NULL);
 668                 g_list_free (attachments_list);
 669         }
 670         g_object_unref (G_OBJECT (parts));
 671
 672         return new_msg;
 673 }
 674
 675
 676
 677 static gint
 678 count_addresses (const gchar* addresses)
 679 {
 680         gint count = 1;
 681
 682         if (!addresses)
 683                 return 0;
 684
 685         while (*addresses) {
 686                 if (*addresses == ',' || *addresses == ';')
 687                         ++count;
 688                 ++addresses;
 689         }
 690
 691         return count;
 692 }
 693
 694
 695 /* get the new To:, based on the old header,
 696  * result is newly allocated or NULL in case of error
 697  * */
 698 static gchar*
 699 get_new_to (TnyMsg *msg, TnyHeader *header, const gchar* from,
 700             ModestTnyMsgReplyMode reply_mode)
 701 {
 702         const gchar* old_reply_to;
 703         const gchar* old_from;
 704         gchar* new_to;
 705
 706         /* according to RFC2369 (http://www.faqs.org/rfcs/rfc2369.html), we
 707          * can identify Mailing-List posts by the List-Help header.
 708          * for mailing lists, both the Reply-To: and From: should be included
 709          * in the new To:; for now, we're ignoring List-Post
 710          */
 711         gchar* list_help = modest_tny_mime_part_get_header_value (TNY_MIME_PART(msg),
 712                                                                   "List-Help");
 713         gboolean is_mailing_list = (list_help != NULL);
 714         g_free (list_help);
 715
 716
 717         /* reply to sender, use ReplyTo or From */
 718         //old_reply_to = tny_header_get_replyto (header);
 719         old_reply_to = modest_tny_mime_part_get_header_value (TNY_MIME_PART(msg),
 720                                                               "Reply-To");
 721         old_from     = tny_header_get_from (header);
 722
 723         if (!old_from &&  !old_reply_to) {
 724                 g_warning ("%s: failed to get either Reply-To: or From: from header",
 725                            __FUNCTION__);
 726                 return NULL;
 727         }
 728
 729         /* for mailing lists, use both Reply-To and From if we did a
 730          * 'Reply All:'
 731          * */
 732         if (is_mailing_list && reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL &&
 733             old_reply_to && old_from && strcmp (old_from, old_reply_to) != 0)
 734                 new_to = g_strjoin (",", old_reply_to, old_from, NULL);
 735         else
 736                 /* otherwise use either Reply-To: (preferred) or From: */
 737                 new_to = g_strdup (old_reply_to ? old_reply_to : old_from);
 738
 739         /* in case of ReplyAll, we need to add the Recipients in the old To: */
 740         if (reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL) {
 741                 const gchar *old_to = tny_header_get_to (header);
 742                 if (!old_to)
 743                         g_warning ("%s: no To: address found in source mail",
 744                                    __FUNCTION__);
 745                 else {
 746                         /* append the old To: */
 747                         gchar *tmp = g_strjoin (",", new_to, old_to, NULL);
 748                         g_free (new_to);
 749                         new_to = tmp;
 750                 }
 751
 752                 /* remove duplicate entries */
 753                 gchar *tmp = modest_text_utils_remove_duplicate_addresses (new_to);
 754                 g_free (new_to);
 755                 new_to = tmp;
 756
 757                 /* now, strip me (the new From:) from the new_to, but only if
 758                  * there are >1 addresses there */
 759                 if (count_addresses (new_to) > 1) {
 760                         gchar *tmp = modest_text_utils_remove_address (new_to, from);
 761                         g_free (new_to);
 762                         new_to = tmp;
 763                 }
 764         }
 765
 766         return new_to;
 767 }
 768
 769
 770 /* get the new Cc:, based on the old header,
 771  * result is newly allocated or NULL in case of error */
 772 static gchar*
 773 get_new_cc (TnyHeader *header, const gchar* from)
 774 {
 775         const gchar *old_cc;
 776
 777         old_cc = tny_header_get_cc (header);
 778         if (!old_cc)
 779                 return NULL;
 780
 781         /* remove me (the new From:) from the Cc: list */
 782         return modest_text_utils_remove_address (old_cc, from);
 783 }
 784
 785
 786 TnyMsg*
 787 modest_tny_msg_create_reply_msg (TnyMsg *msg,
 788                                  TnyHeader *header,
 789                                  const gchar *from,
 790                                  const gchar *signature,
 791                                  ModestTnyMsgReplyType reply_type,
 792                                  ModestTnyMsgReplyMode reply_mode)
 793 {
 794         TnyMsg *new_msg = NULL;
 795         TnyHeader *new_header;
 796         gchar *new_to = NULL;
 797         TnyList *parts = NULL;
 798         GList *attachments_list = NULL;
 799
 800         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 801
 802         parts = TNY_LIST (tny_simple_list_new());
 803         tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 804         tny_list_foreach (parts, add_if_attachment, &attachments_list);
 805
 806         new_msg = create_reply_forward_mail (msg, header, from, signature, TRUE, reply_type,
 807                                              attachments_list);
 808         if (attachments_list != NULL) {
 809                 g_list_foreach (attachments_list, (GFunc) g_object_unref, NULL);
 810                 g_list_free (attachments_list);
 811         }
 812         if (parts)
 813                 g_object_unref (G_OBJECT (parts));
 814
 815         /* Fill the header */
 816         if (header)
 817                 g_object_ref (header);
 818         else
 819                 header = tny_msg_get_header (msg);
 820
 821
 822         new_header = tny_msg_get_header(new_msg);
 823         new_to = get_new_to (msg, header, from, reply_mode);
 824         if (!new_to)
 825                 g_warning ("%s: failed to get new To:", __FUNCTION__);
 826         else {
 827                 tny_header_set_to (new_header, new_to);
 828                 g_free (new_to);
 829         }
 830
 831         if (reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL) {
 832                 gchar *new_cc = get_new_cc (header, from);
 833                 if (new_cc) {
 834                         tny_header_set_cc (new_header, new_cc);
 835                         g_free (new_cc);
 836                 }
 837         }
 838
 839         /* Clean */
 840         g_object_unref (G_OBJECT (new_header));
 841         g_object_unref (G_OBJECT (header));
 842
 843         return new_msg;
 844 }
 845
 846
 847 static gboolean
 848 is_ascii(const gchar *s)
 849 {
 850         if (!s)
 851                 return TRUE;
 852         while (s[0]) {
 853                 if (s[0] & 128 || s[0] < 32)
 854                         return FALSE;
 855                 s++;
 856         }
 857         return TRUE;
 858 }
 859
 860 static char *
 861 get_content_type(const gchar *s)
 862 {
 863         GString *type;
 864
 865         type = g_string_new("text/plain");
 866         if (!is_ascii(s)) {
 867                 if (g_utf8_validate(s, -1, NULL)) {
 868                         g_string_append(type, "; charset=\"utf-8\"");
 869                 } else {
 870                         /* it should be impossible to reach this, but better safe than sorry */
 871                         g_warning("invalid utf8 in message");
 872                         g_string_append(type, "; charset=\"latin1\"");
 873                 }
 874         }
 875         return g_string_free(type, FALSE);
 876 }
 877
 878 guint64
 879 modest_tny_msg_estimate_size (const gchar *plain_body, const gchar *html_body,
 880                               guint64 parts_count,
 881                               guint64 parts_size)
 882 {
 883         guint64 result;
 884
 885         /* estimation of headers size */
 886         result = 1024;
 887
 888         /* We add a 20% of size due to the increase in 7bit encoding */
 889         if (plain_body) {
 890                 result += strlen (plain_body) * 120 / 100;
 891         }
 892         if (html_body) {
 893                 result += strlen (html_body) * 120 / 100;
 894         }
 895
 896         /* 256 bytes per additional part because of their headers */
 897         result += parts_count * 256;
 898
 899         /* 150% of increase per encoding */
 900         result += parts_size * 3 / 2;
 901
 902         return result;
 903 }