vcs.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-defs.h>
  37 #include "modest-formatter.h"
  38 #include <tny-camel-mem-stream.h>
  39 #include <tny-camel-mime-part.h>
  40 #include <glib/gprintf.h>
  41 #include <modest-tny-folder.h>
  42 #include "modest-tny-mime-part.h"
  43 #include <modest-error.h>
  44
  45
  46 #ifdef HAVE_CONFIG_H
  47 #include <config.h>
  48 #endif /*HAVE_CONFIG_H */
  49
  50 #include <modest-tny-msg.h>
  51 #include "modest-text-utils.h"
  52
  53 static TnyMimePart * add_body_part (TnyMsg *msg, const gchar *body,
  54                                     const gchar *content_type);
  55 static TnyMimePart * add_html_body_part (TnyMsg *msg, const gchar *body);
  56 static gint add_attachments (TnyMimePart *part, GList *attachments_list, gboolean add_inline, GError **err);
  57 static void add_images (TnyMsg *msg, GList *attachments_list, GError **err);
  58 static char * get_content_type(const gchar *s);
  59 static gboolean is_ascii(const gchar *s);
  60
  61
  62 TnyMsg*
  63 modest_tny_msg_new (const gchar* mailto, const gchar* from, const gchar *cc,
  64                     const gchar *bcc, const gchar* subject,
  65                     const gchar *references, const gchar *in_reply_to,
  66                     const gchar *body,
  67                     GList *attachments, gint *attached, GError **err)
  68 {
  69         TnyMsg *new_msg;
  70         TnyHeader *header;
  71         gchar *content_type;
  72         gint tmp_attached = 0;
  73
  74         /* Create new msg */
  75         new_msg = modest_formatter_create_message (NULL, TRUE, (attachments != NULL), FALSE);
  76         header  = tny_msg_get_header (new_msg);
  77
  78         if ((from != NULL) && (strlen(from) > 0)) {
  79                 tny_header_set_from (TNY_HEADER (header), from);
  80                 tny_header_set_replyto (TNY_HEADER (header), from);
  81         }
  82         if ((mailto != NULL) && (strlen(mailto) > 0)) {
  83                 gchar *removed_to = modest_text_utils_remove_duplicate_addresses (mailto);
  84                 tny_header_set_to (TNY_HEADER (header), removed_to);
  85                 g_free (removed_to);
  86         }
  87         if ((cc != NULL) && (strlen(cc) > 0))
  88                 tny_header_set_cc (TNY_HEADER (header), cc);
  89         if ((bcc != NULL) && (strlen(bcc) > 0))
  90                 tny_header_set_bcc (TNY_HEADER (header), bcc);
  91
  92         if ((subject != NULL) && (strlen(subject) > 0))
  93                 tny_header_set_subject (TNY_HEADER (header), subject);
  94
  95         content_type = get_content_type(body);
  96
  97         /* set modest as the X-Mailer
  98          * we could this in the platform factory, but then the header
  99          * would show up before all the others.
 100          */
 101         tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "X-Mailer", "Modest "
 102                                        VERSION);
 103
 104         if (references)
 105                 tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "References", references);
 106
 107         if (in_reply_to)
 108                 tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "In-Reply-To", in_reply_to);
 109
 110         /* Add the body of the new mail */
 111         /* This is needed even if body is NULL or empty. */
 112         add_body_part (new_msg, body, content_type);
 113         g_free (content_type);
 114
 115         /* Add attachments */
 116         if (attachments)
 117                 tmp_attached = add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE, err);
 118         if (attached)
 119                 *attached = tmp_attached;
 120         if (header)
 121                 g_object_unref(header);
 122
 123         return new_msg;
 124 }
 125
 126 TnyMsg*
 127 modest_tny_msg_new_html_plain (const gchar* mailto, const gchar* from, const gchar *cc,
 128                                const gchar *bcc, const gchar* subject,
 129                                const gchar *references, const gchar *in_reply_to,
 130                                const gchar *html_body, const gchar *plain_body,
 131                                GList *attachments, GList *images, gint *attached, GError **err)
 132 {
 133         TnyMsg *new_msg;
 134         TnyHeader *header;
 135         gchar *content_type;
 136         gint tmp_attached;
 137
 138         /* Create new msg */
 139         new_msg = modest_formatter_create_message (NULL, FALSE, (attachments != NULL), (images != NULL));
 140         header  = tny_msg_get_header (new_msg);
 141
 142         if ((from != NULL) && (strlen(from) > 0)) {
 143                 tny_header_set_from (TNY_HEADER (header), from);
 144                 tny_header_set_replyto (TNY_HEADER (header), from);
 145         }
 146         if ((mailto != NULL) && (strlen(mailto) > 0))
 147                 tny_header_set_to (TNY_HEADER (header), mailto);
 148         if ((cc != NULL) && (strlen(cc) > 0))
 149                 tny_header_set_cc (TNY_HEADER (header), cc);
 150         if ((bcc != NULL) && (strlen(bcc) > 0))
 151                 tny_header_set_bcc (TNY_HEADER (header), bcc);
 152
 153         if ((subject != NULL) && (strlen(subject) > 0))
 154                 tny_header_set_subject (TNY_HEADER (header), subject);
 155
 156         content_type = get_content_type(plain_body);
 157
 158         /* set modest as the X-Mailer
 159          * we could this in the platform factory, but then the header
 160          * would show up before all the others.
 161          */
 162         tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "X-Mailer", "Modest "
 163                                        VERSION);
 164
 165         if (references)
 166                 tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "References", references);
 167
 168         if (in_reply_to)
 169                 tny_mime_part_set_header_pair (TNY_MIME_PART (new_msg), "In-Reply-To", in_reply_to);
 170
 171         /* Add the body of the new mail */
 172         add_body_part (new_msg, plain_body, content_type);
 173         add_html_body_part (new_msg, html_body);
 174         g_free (content_type);
 175
 176         /* Add attachments */
 177         tmp_attached = add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE, err);
 178         if (attached)
 179                 *attached = tmp_attached;
 180         add_images (new_msg, images, err);
 181         if (header)
 182                 g_object_unref(header);
 183
 184         return new_msg;
 185 }
 186
 187
 188 /* FIXME: this func copy from modest-mail-operation: refactor */
 189 static TnyMimePart *
 190 add_body_part (TnyMsg *msg,
 191                const gchar *body,
 192                const gchar *content_type)
 193 {
 194         TnyMimePart *text_body_part = NULL;
 195         TnyStream *text_body_stream;
 196
 197         /* Create the stream */
 198         text_body_stream = TNY_STREAM (tny_camel_mem_stream_new_with_buffer
 199                                         (body, (body ? strlen(body) : 0)));
 200
 201         text_body_part = modest_formatter_create_body_part (NULL, msg);
 202
 203         /* Construct MIME part */
 204         tny_stream_reset (text_body_stream);
 205         tny_mime_part_construct (text_body_part,
 206                                  text_body_stream,
 207                                  content_type, "7bit");
 208         tny_stream_reset (text_body_stream);
 209
 210         g_object_unref (G_OBJECT(text_body_part));
 211
 212         /* Clean */
 213         g_object_unref (text_body_stream);
 214
 215         return text_body_part;
 216 }
 217
 218 static TnyMimePart *
 219 add_html_body_part (TnyMsg *msg,
 220                     const gchar *body)
 221 {
 222         TnyMimePart *html_body_part = NULL;
 223         TnyStream *html_body_stream;
 224
 225         /* Create the stream */
 226         html_body_stream = TNY_STREAM (tny_camel_mem_stream_new_with_buffer
 227                                         (body, strlen(body)));
 228
 229         /* Create body part if needed */
 230         html_body_part = modest_formatter_create_body_part (NULL, msg);
 231
 232         /* Construct MIME part */
 233         tny_stream_reset (html_body_stream);
 234         tny_mime_part_construct (html_body_part,
 235                                  html_body_stream,
 236                                  "text/html; charset=utf-8",
 237                                  "7bit"); /* Sometimes it might be needed
 238                                              to make this one a 8bit! */
 239         tny_stream_reset (html_body_stream);
 240
 241         g_object_unref (G_OBJECT(html_body_part));
 242
 243         /* Clean */
 244         g_object_unref (html_body_stream);
 245
 246         return html_body_part;
 247 }
 248
 249 static TnyMimePart *
 250 copy_mime_part (TnyMimePart *part, GError **err)
 251 {
 252         TnyMimePart *result = NULL;
 253         const gchar *attachment_content_type;
 254         const gchar *attachment_filename;
 255         const gchar *attachment_cid;
 256         TnyList *parts;
 257         TnyIterator *iterator;
 258         TnyStream *attachment_stream;
 259         const gchar *enc;
 260         gint ret;
 261
 262         if (TNY_IS_MSG (part)) {
 263                 g_object_ref (part);
 264                 return part;
 265         }
 266
 267         result = tny_platform_factory_new_mime_part (
 268                 modest_runtime_get_platform_factory());
 269
 270         attachment_content_type = tny_mime_part_get_content_type (part);
 271
 272         /* get mime part headers */
 273         attachment_filename = tny_mime_part_get_filename (part);
 274         attachment_cid = tny_mime_part_get_content_id (part);
 275
 276         /* fill the stream */
 277         attachment_stream = tny_mime_part_get_decoded_stream (part);
 278         enc = tny_mime_part_get_transfer_encoding (part);
 279         if (attachment_stream == NULL) {
 280                 if (err != NULL && *err == NULL)
 281                         g_set_error (err, MODEST_MAIL_OPERATION_ERROR, MODEST_MAIL_OPERATION_ERROR_FILE_IO, _("TODO: couldn't retrieve attachment"));
 282                 g_object_unref (result);
 283                 return NULL;
 284         } else {
 285                 ret = tny_stream_reset (attachment_stream);
 286                 ret = tny_mime_part_construct (result,
 287                                                attachment_stream,
 288                                                attachment_content_type,
 289                                                enc);
 290                 ret = tny_stream_reset (attachment_stream);
 291         }
 292
 293         /* set other mime part fields */
 294         tny_mime_part_set_filename (result, attachment_filename);
 295         tny_mime_part_set_content_id (result, attachment_cid);
 296
 297         /* copy subparts */
 298         parts = tny_simple_list_new ();
 299         tny_mime_part_get_parts (part, parts);
 300         iterator = tny_list_create_iterator (parts);
 301         while (!tny_iterator_is_done (iterator)) {
 302                 TnyMimePart *subpart = TNY_MIME_PART (tny_iterator_get_current (iterator));
 303                 if (subpart) {
 304                         const gchar *subpart_cid;
 305                         TnyMimePart *subpart_copy = copy_mime_part (subpart, err);
 306                         if (subpart_copy != NULL) {
 307                                 subpart_cid = tny_mime_part_get_content_id (subpart);
 308                                 tny_mime_part_add_part (result, subpart_copy);
 309                                 if (subpart_cid)
 310                                         tny_mime_part_set_content_id (result, subpart_cid);
 311                                 g_object_unref (subpart_copy);
 312                         }
 313                         g_object_unref (subpart);
 314                 }
 315
 316                 tny_iterator_next (iterator);
 317         }
 318         g_object_unref (iterator);
 319         g_object_unref (parts);
 320         g_object_unref (attachment_stream);
 321
 322         return result;
 323 }
 324
 325 static gint
 326 add_attachments (TnyMimePart *part, GList *attachments_list, gboolean add_inline, GError **err)
 327 {
 328         GList *pos;
 329         TnyMimePart *attachment_part, *old_attachment;
 330         gint ret;
 331         gint attached = 0;
 332
 333         for (pos = (GList *)attachments_list; pos; pos = pos->next) {
 334
 335                 old_attachment = pos->data;
 336                 if (!tny_mime_part_is_purged (old_attachment)) {
 337                         gchar *old_cid;
 338                         old_cid = g_strdup (tny_mime_part_get_content_id (old_attachment));
 339                         attachment_part = copy_mime_part (old_attachment, err);
 340                         if (attachment_part != NULL) {
 341                                 if (add_inline) {
 342                                         tny_mime_part_set_header_pair (attachment_part, "Content-Disposition",
 343                                                                        "inline");
 344                                 } else {
 345                                         const gchar *filename;
 346                                         filename = tny_mime_part_get_filename (old_attachment);
 347                                         if (filename)
 348                                                 tny_mime_part_set_filename (attachment_part, filename);
 349                                         else
 350                                                 tny_mime_part_set_header_pair (attachment_part, "Content-Disposition",
 351                                                                                "attachment");
 352                                 }
 353                                 if (!TNY_IS_MSG (old_attachment))  {
 354                                         tny_mime_part_set_transfer_encoding (TNY_MIME_PART (attachment_part), "base64");
 355                                 }
 356                                 ret = tny_mime_part_add_part (TNY_MIME_PART (part), attachment_part);
 357                                 attached++;
 358                                 if (old_cid)
 359                                         tny_mime_part_set_content_id (attachment_part, old_cid);
 360                                 g_object_unref (attachment_part);
 361                         }
 362                         g_free (old_cid);
 363                 }
 364         }
 365         return attached;
 366 }
 367
 368 static void
 369 add_images (TnyMsg *msg, GList *images_list, GError **err)
 370 {
 371         TnyMimePart *related_part = NULL;
 372         const gchar *content_type;
 373
 374         content_type = tny_mime_part_get_content_type (TNY_MIME_PART (msg));
 375
 376         if ((content_type != NULL) && !strcasecmp (content_type, "multipart/related")) {
 377                 related_part = g_object_ref (msg);
 378         } else if ((content_type != NULL) && !strcasecmp (content_type, "multipart/mixed")) {
 379                 TnyList *parts = TNY_LIST (tny_simple_list_new ());
 380                 TnyIterator *iter = NULL;
 381                 tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 382                 iter = tny_list_create_iterator (parts);
 383
 384                 while (!tny_iterator_is_done (iter)) {
 385                         TnyMimePart *part = TNY_MIME_PART (tny_iterator_get_current (iter));
 386                         if (part && !g_ascii_strcasecmp (tny_mime_part_get_content_type (part), "multipart/related")) {
 387                                 related_part = part;
 388                                 break;
 389                         }
 390                         if (part)
 391                                 g_object_unref (part);
 392                         tny_iterator_next (iter);
 393                 }
 394                 g_object_unref (iter);
 395                 g_object_unref (parts);
 396         }
 397
 398         if (related_part != NULL) {
 399                 /* TODO: attach images in their proper place */
 400                 add_attachments (related_part, images_list, TRUE, err);
 401                 g_object_unref (related_part);
 402         }
 403 }
 404
 405
 406 gchar *
 407 modest_tny_msg_get_body (TnyMsg *msg, gboolean want_html, gboolean *is_html)
 408 {
 409         TnyStream *stream;
 410         TnyMimePart *body;
 411         GtkTextBuffer *buf;
 412         GtkTextIter start, end;
 413         gchar *to_quote;
 414         gboolean result_was_html = TRUE;
 415
 416         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 417
 418         body = modest_tny_msg_find_body_part(msg, want_html);
 419         if (!body)
 420                 return NULL;
 421
 422         buf = gtk_text_buffer_new (NULL);
 423         stream = TNY_STREAM (tny_gtk_text_buffer_stream_new (buf));
 424         tny_stream_reset (stream);
 425         tny_mime_part_decode_to_stream (body, stream, NULL);
 426         tny_stream_reset (stream);
 427
 428         gtk_text_buffer_get_bounds (buf, &start, &end);
 429         to_quote = gtk_text_buffer_get_text (buf, &start, &end, FALSE);
 430         if (tny_mime_part_content_type_is (body, "text/plain")) {
 431                 gchar *to_quote_converted = modest_text_utils_convert_to_html (to_quote);
 432                 g_free (to_quote);
 433                 to_quote = to_quote_converted;
 434                 result_was_html = FALSE;
 435         }
 436
 437         g_object_unref (buf);
 438         g_object_unref (G_OBJECT(stream));
 439         g_object_unref (G_OBJECT(body));
 440
 441         if (is_html != NULL)
 442                 *is_html = result_was_html;
 443
 444         return to_quote;
 445 }
 446
 447
 448 static TnyMimePart*
 449 modest_tny_msg_find_body_part_in_alternative (TnyMimePart *msg, gboolean want_html)
 450 {
 451         TnyList *parts;
 452         TnyIterator *iter;
 453         TnyMimePart *part = NULL;
 454         TnyMimePart *first_part = NULL;
 455         const gchar *desired_mime_type = want_html ? "text/html" : "text/plain";
 456
 457         parts = TNY_LIST (tny_simple_list_new());
 458         tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 459
 460         for (iter  = tny_list_create_iterator(parts);
 461              !tny_iterator_is_done (iter);
 462              tny_iterator_next (iter)) {
 463                 gchar *content_type;
 464                 gboolean is_body;
 465
 466                 part = TNY_MIME_PART (tny_iterator_get_current (iter));
 467
 468                 if (first_part == NULL) {
 469                         g_object_ref (part);
 470                         first_part = part;
 471                 }
 472
 473                 is_body = FALSE;
 474                 content_type = g_ascii_strdown (tny_mime_part_get_content_type (part), -1);
 475                 is_body = g_str_has_prefix (content_type, desired_mime_type);
 476                 if (is_body)
 477                         break;
 478
 479                 g_object_unref (part);
 480                 part = NULL;
 481
 482         }
 483         g_object_unref (iter);
 484         g_object_unref (parts);
 485
 486         if (part == NULL) {
 487                 return first_part;
 488         } else {
 489                 if (first_part) g_object_unref (first_part);
 490                 return part;
 491         }
 492 }
 493
 494 TnyMimePart*
 495 modest_tny_msg_find_body_part_from_mime_part (TnyMimePart *msg, gboolean want_html)
 496 {
 497         TnyMimePart *part = NULL;
 498         TnyList *parts = NULL;
 499         TnyIterator *iter = NULL;
 500         gchar *header_content_type;
 501         gchar *header_content_type_lower = NULL;
 502
 503         if (!msg)
 504                 return NULL;
 505
 506         /* If it's an application multipart, then we don't get into as we don't
 507          * support them (for example application/sml or wap messages */
 508         header_content_type = modest_tny_mime_part_get_header_value (msg, "Content-Type");
 509         if (header_content_type) {
 510                 header_content_type = g_strstrip (header_content_type);
 511                 header_content_type_lower = g_ascii_strdown (header_content_type, -1);
 512         }
 513         if (header_content_type_lower &&
 514             g_str_has_prefix (header_content_type_lower, "multipart/") &&
 515             !g_str_has_prefix (header_content_type_lower, "multipart/signed") &&
 516             strstr (header_content_type_lower, "application/")) {
 517                 g_free (header_content_type_lower);
 518                 g_free (header_content_type);
 519                 return NULL;
 520         }
 521         if (header_content_type_lower &&
 522             g_str_has_prefix (header_content_type_lower, "multipart/alternative")) {
 523                 g_free (header_content_type_lower);
 524                 g_free (header_content_type);
 525                 return modest_tny_msg_find_body_part_in_alternative (msg, want_html);
 526         }
 527         g_free (header_content_type_lower);
 528         g_free (header_content_type);
 529
 530         parts = TNY_LIST (tny_simple_list_new());
 531         tny_mime_part_get_parts (TNY_MIME_PART (msg), parts);
 532
 533         iter  = tny_list_create_iterator(parts);
 534
 535         /* no parts? assume it's single-part message */
 536         if (tny_iterator_is_done(iter)) {
 537                 gchar *content_type;
 538                 gboolean is_text_part;
 539                 g_object_unref (G_OBJECT(iter));
 540                 content_type = modest_tny_mime_part_get_content_type (msg);
 541                 if (content_type == NULL)
 542                         return NULL;
 543                 is_text_part =
 544                         g_str_has_prefix (content_type, "text/");
 545                 g_free (content_type);
 546                 /* if this part cannot be a supported body return NULL */
 547                 if (!is_text_part) {
 548                         return NULL;
 549                 } else {
 550                         return TNY_MIME_PART (g_object_ref(G_OBJECT(msg)));
 551                 }
 552         } else {
 553                 do {
 554                         gchar *tmp, *content_type = NULL;
 555                         gboolean has_content_disp_name = FALSE;
 556
 557                         part = TNY_MIME_PART(tny_iterator_get_current (iter));
 558
 559                         if (!part) {
 560                                 g_warning ("%s: not a valid mime part", __FUNCTION__);
 561                                 tny_iterator_next (iter);
 562                                 continue;
 563                         }
 564
 565                         /* it's a message --> ignore */
 566                         if (part && TNY_IS_MSG (part)) {
 567                                 g_object_unref (part);
 568                                 part = NULL;
 569                                 tny_iterator_next (iter);
 570                                 continue;
 571                         }
 572
 573                         /* we need to strdown the content type, because
 574                          * tny_mime_part_has_content_type does not do it...
 575                          */
 576                         content_type = g_ascii_strdown (tny_mime_part_get_content_type (part), -1);
 577
 578                         /* mime-parts with a content-disposition header (either 'inline' or 'attachment')
 579                          * and a 'name=' thingy cannot be body parts
 580                          */
 581
 582                         tmp = modest_tny_mime_part_get_header_value (part, "Content-Disposition");
 583                         if (tmp) {
 584                                 gchar *content_disp = g_ascii_strdown(tmp, -1);
 585                                 g_free (tmp);
 586                                 has_content_disp_name = g_strstr_len (content_disp, strlen(content_disp), "name=") != NULL;
 587                                 g_free (content_disp);
 588                         }
 589
 590                         if (g_str_has_prefix (content_type, "text/") &&
 591                             !has_content_disp_name &&
 592                             !modest_tny_mime_part_is_attachment_for_modest (part)) {
 593                                 /* we found the body. Doesn't have to be the desired mime part, first
 594                                    text/ part in a mixed is the body */
 595                                 g_free (content_type);
 596                                 break;
 597
 598                         } else if (g_str_has_prefix(content_type, "multipart/alternative")) {
 599
 600                                 /* multipart? recurse! */
 601                                 g_object_unref (part);
 602                                 g_free (content_type);
 603                                 part = modest_tny_msg_find_body_part_in_alternative (part, want_html);
 604                                 if (part)
 605                                         break;
 606
 607                         } else  if (g_str_has_prefix(content_type, "multipart")) {
 608
 609                                 /* multipart? recurse! */
 610                                 g_object_unref (part);
 611                                 g_free (content_type);
 612                                 part = modest_tny_msg_find_body_part_from_mime_part (part, want_html);
 613                                 if (part)
 614                                         break;
 615                         } else
 616                                 g_free (content_type);
 617
 618                         if (part) {
 619                                 g_object_unref (G_OBJECT(part));
 620                                 part = NULL;
 621                         }
 622
 623                         tny_iterator_next (iter);
 624
 625                 } while (!tny_iterator_is_done(iter));
 626         }
 627
 628         g_object_unref (G_OBJECT(iter));
 629         g_object_unref (G_OBJECT(parts));
 630
 631         return part; /* this maybe NULL, this is not an error; some message just don't have a body
 632                       * part */
 633 }
 634
 635
 636 TnyMimePart*
 637 modest_tny_msg_find_body_part (TnyMsg *msg, gboolean want_html)
 638 {
 639         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 640
 641         return modest_tny_msg_find_body_part_from_mime_part (TNY_MIME_PART(msg),
 642                                                              want_html);
 643 }
 644
 645
 646 #define MODEST_TNY_MSG_PARENT_UID "parent-uid"
 647
 648 static TnyMsg *
 649 create_reply_forward_mail (TnyMsg *msg, TnyHeader *header, const gchar *from,
 650                            const gchar *signature, gboolean is_reply,
 651                            guint type /*ignored*/, GList *attachments)
 652 {
 653         TnyMsg *new_msg;
 654         TnyHeader *new_header;
 655         gchar *old_subject;
 656         gchar *new_subject;
 657         TnyMimePart *body = NULL;
 658         TnyMimePart *html_body = NULL;
 659         ModestFormatter *formatter;
 660         gchar *subject_prefix;
 661         gboolean no_text_part;
 662         gchar *parent_uid;
 663         gboolean forward_as_attach = FALSE;
 664
 665         if (header)
 666                 g_object_ref (header);
 667         else
 668                 header = tny_msg_get_header (msg);
 669
 670         /* Get body from original msg. Always look for the text/plain
 671            part of the message to create the reply/forwarded mail */
 672         if (msg != NULL) {
 673                 body   = modest_tny_msg_find_body_part (msg, FALSE);
 674                 html_body = modest_tny_msg_find_body_part (msg, TRUE);
 675         }
 676
 677         if (modest_conf_get_bool (modest_runtime_get_conf (), MODEST_CONF_PREFER_FORMATTED_TEXT,
 678                                   NULL))
 679                 formatter = modest_formatter_new ("text/html", signature);
 680         else
 681                 formatter = modest_formatter_new ("text/plain", signature);
 682
 683
 684         /* if we don't have a text-part */
 685         no_text_part = (!body) || (strcmp (tny_mime_part_get_content_type (body), "text/html")==0);
 686
 687         /* when we're reply, include the text part if we have it, or nothing otherwise. */
 688         if (is_reply)
 689                 new_msg = modest_formatter_quote  (formatter, body, header,
 690                                                     attachments);
 691         else {
 692                 if (no_text_part || (html_body && (strcmp (tny_mime_part_get_content_type (html_body), "text/html")==0))) {
 693                         forward_as_attach = TRUE;
 694                         new_msg = modest_formatter_attach (formatter, msg, header);
 695                 } else {
 696                         forward_as_attach = FALSE;
 697                         new_msg = modest_formatter_inline  (formatter, body, header,
 698                                                             attachments);
 699                 }
 700         }
 701
 702         g_object_unref (G_OBJECT(formatter));
 703         if (body)
 704                 g_object_unref (G_OBJECT(body));
 705         if (html_body)
 706                 g_object_unref (G_OBJECT(html_body));
 707
 708         /* Fill the header */
 709         new_header = tny_msg_get_header (new_msg);
 710         tny_header_set_from (new_header, from);
 711         tny_header_set_replyto (new_header, from);
 712
 713         /* Change the subject */
 714         if (is_reply)
 715                 subject_prefix = g_strconcat (_("mail_va_re"), ":", NULL);
 716         else
 717                 subject_prefix = g_strconcat (_("mail_va_fw"), ":", NULL);
 718         old_subject = tny_header_dup_subject (header);
 719         new_subject =
 720                 (gchar *) modest_text_utils_derived_subject (old_subject,
 721                                                              subject_prefix);
 722         g_free (old_subject);
 723         g_free (subject_prefix);
 724         tny_header_set_subject (new_header, (const gchar *) new_subject);
 725         g_free (new_subject);
 726
 727         /* get the parent uid, and set it as a gobject property on the new msg */
 728         parent_uid = modest_tny_folder_get_header_unique_id (header);
 729         g_object_set_data_full (G_OBJECT(new_msg), MODEST_TNY_MSG_PARENT_UID,
 730                                 parent_uid, g_free);
 731
 732         /* set modest as the X-Mailer
 733          * we could this in the platform factory, but then the header
 734          * would show up before all the others.
 735          */
 736         tny_mime_part_set_header_pair (TNY_MIME_PART (msg), "X-Mailer", "Modest "
 737                                        VERSION);
 738
 739         /* Clean */
 740         g_object_unref (G_OBJECT (new_header));
 741         g_object_unref (G_OBJECT (header));
 742         /* ugly to unref it here instead of in the calling func */
 743
 744         if (!is_reply & !forward_as_attach) {
 745                 add_attachments (TNY_MIME_PART (new_msg), attachments, FALSE, NULL);
 746         }
 747
 748         return new_msg;
 749 }
 750
 751 const gchar*
 752 modest_tny_msg_get_parent_uid (TnyMsg *msg)
 753 {
 754         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 755
 756         return g_object_get_data (G_OBJECT(msg), MODEST_TNY_MSG_PARENT_UID);
 757 }
 758
 759 static gchar *get_signed_protocol (TnyMimePart *part)
 760 {
 761         TnyList *header_pairs;
 762         TnyIterator *iterator;
 763         gchar *result = NULL;
 764
 765         header_pairs = TNY_LIST (tny_simple_list_new ());
 766         tny_mime_part_get_header_pairs (part, header_pairs);
 767         iterator = tny_list_create_iterator (header_pairs);
 768
 769         while (!result && !tny_iterator_is_done (iterator)) {
 770                 TnyPair *pair;
 771                 const gchar *name;
 772
 773                 pair = TNY_PAIR (tny_iterator_get_current (iterator));
 774                 name = tny_pair_get_name (pair);
 775                 if (name && !g_ascii_strcasecmp (name, "Content-Type")) {
 776                         const gchar *s;
 777                         s = tny_pair_get_value (pair);
 778                         if (s) {
 779                                 s = strstr (s, "protocol=");
 780                                 if (s) {
 781                                         const gchar *t;
 782                                         s += 9;
 783                                         if (*s == '\"') {
 784                                                 s++;
 785                                                 t = strstr (s, "\"");
 786                                         } else {
 787                                                 t = strstr (s, ";");
 788                                         }
 789                                         result = g_strndup (s, t - s);
 790                                 }
 791                         }
 792                 }
 793
 794                 g_object_unref (pair);
 795                 tny_iterator_next (iterator);
 796         }
 797
 798         g_object_unref (iterator);
 799         g_object_unref (header_pairs);
 800
 801         return result;
 802 }
 803
 804 TnyMimePart *
 805 modest_tny_msg_get_attachments_parent (TnyMsg *msg)
 806 {
 807         TnyMimePart *result;
 808         const gchar *content_type;
 809
 810         result = NULL;
 811
 812         content_type = tny_mime_part_get_content_type (TNY_MIME_PART (msg));
 813         if (content_type && !strcmp (content_type, "multipart/signed")) {
 814                 TnyList *msg_children;
 815                 TnyIterator *iterator;
 816                 gchar *signed_protocol;
 817
 818                 msg_children = TNY_LIST (tny_simple_list_new ());
 819                 tny_mime_part_get_parts (TNY_MIME_PART (msg), msg_children);
 820
 821                 iterator = tny_list_create_iterator (msg_children);
 822                 signed_protocol = get_signed_protocol (TNY_MIME_PART (msg));
 823
 824                 while (!result && !tny_iterator_is_done (iterator)) {
 825                         TnyMimePart *part;
 826
 827                         part = TNY_MIME_PART (tny_iterator_get_current (iterator));
 828                         if (signed_protocol) {
 829                                 const gchar *part_content_type;
 830
 831                                 part_content_type = tny_mime_part_get_content_type (part);
 832                                 if (part_content_type && g_ascii_strcasecmp (part_content_type, signed_protocol)) {
 833                                         result = g_object_ref (part);
 834                                 }
 835                         } else {
 836                                 result = g_object_ref (part);
 837                         }
 838
 839                         g_object_unref (part);
 840                         tny_iterator_next (iterator);
 841                 }
 842
 843                 g_object_unref (iterator);
 844                 g_free (signed_protocol);
 845                 g_object_unref (msg_children);
 846         }
 847         if (result == NULL) {
 848                 result = g_object_ref (msg);
 849         }
 850
 851         return result;
 852 }
 853
 854
 855
 856 static void
 857 add_if_attachment (gpointer data, gpointer user_data)
 858 {
 859         TnyMimePart *part;
 860         GList **attachments_list;
 861
 862         part = TNY_MIME_PART (data);
 863         attachments_list = ((GList **) user_data);
 864
 865         if ((tny_mime_part_is_attachment (part))||(TNY_IS_MSG (part))) {
 866                 *attachments_list = g_list_prepend (*attachments_list, part);
 867                 g_object_ref (part);
 868         }
 869 }
 870
 871 TnyMsg*
 872 modest_tny_msg_create_forward_msg (TnyMsg *msg,
 873                                    const gchar *from,
 874                                    const gchar *signature,
 875                                    ModestTnyMsgForwardType forward_type)
 876 {
 877         TnyMsg *new_msg;
 878         TnyList *parts = NULL;
 879         GList *attachments_list = NULL;
 880         TnyMimePart *part_to_check = NULL;
 881
 882         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
 883
 884         part_to_check = modest_tny_msg_get_attachments_parent (TNY_MSG (msg));
 885
 886         /* Add attachments */
 887         parts = TNY_LIST (tny_simple_list_new());
 888         tny_mime_part_get_parts (TNY_MIME_PART (part_to_check), parts);
 889         tny_list_foreach (parts, add_if_attachment, &attachments_list);
 890
 891         new_msg = create_reply_forward_mail (msg, NULL, from, signature, FALSE, forward_type,
 892                                              attachments_list);
 893
 894         /* Clean */
 895         if (attachments_list) {
 896                 g_list_foreach (attachments_list, (GFunc) g_object_unref, NULL);
 897                 g_list_free (attachments_list);
 898         }
 899         g_object_unref (G_OBJECT (parts));
 900         g_object_unref (part_to_check);
 901
 902         return new_msg;
 903 }
 904
 905
 906
 907 static gint
 908 count_addresses (const gchar* addresses)
 909 {
 910         gint count = 1;
 911
 912         if (!addresses)
 913                 return 0;
 914
 915         while (*addresses) {
 916                 if (*addresses == ',' || *addresses == ';')
 917                         ++count;
 918                 ++addresses;
 919         }
 920
 921         return count;
 922 }
 923
 924 static void
 925 remove_undisclosed_recipients (gchar **recipients)
 926 {
 927         GSList *addresses, *node;
 928         gboolean is_first;
 929         GString *result;
 930
 931         g_return_if_fail (recipients);
 932         addresses = modest_text_utils_split_addresses_list (*recipients);
 933
 934         is_first = TRUE;
 935         result = g_string_new ("");
 936         for (node = addresses; node != NULL; node = g_slist_next (node)) {
 937                 const gchar *address = (const gchar *) node->data;
 938
 939                 if (address && strstr (address, "undisclosed-recipients"))
 940                         continue;
 941
 942                 if (is_first)
 943                         is_first = FALSE;
 944                 else
 945                         result = g_string_append (result, ", ");
 946
 947                 result = g_string_append (result, address);
 948         }
 949         g_slist_foreach (addresses, (GFunc)g_free, NULL);
 950         g_slist_free (addresses);
 951
 952         g_free (*recipients);
 953         *recipients = g_string_free (result, FALSE);
 954 }
 955
 956
 957 /* get the new To:, based on the old header,
 958  * result is newly allocated or NULL in case of error
 959  * */
 960 static gchar*
 961 get_new_to (TnyMsg *msg, TnyHeader *header, const gchar* from,
 962             ModestTnyMsgReplyMode reply_mode)
 963 {
 964         const gchar *reply_header = "Reply-To:";
 965         const gchar *from_header = "From:";
 966         gchar* old_reply_to;
 967         gchar* old_from;
 968         gchar* new_to;
 969         gchar* tmp;
 970
 971         /* according to RFC2369 (http://www.faqs.org/rfcs/rfc2369.html), we
 972          * can identify Mailing-List posts by the List-Help header.
 973          * for mailing lists, both the Reply-To: and From: should be included
 974          * in the new To:; for now, we're ignoring List-Post
 975          */
 976         gchar* list_help = modest_tny_mime_part_get_header_value (TNY_MIME_PART(msg),
 977                                                                   "List-Help");
 978         gboolean is_mailing_list = (list_help != NULL);
 979         g_free (list_help);
 980
 981
 982         /* reply to sender, use ReplyTo or From */
 983         old_reply_to = modest_tny_mime_part_get_header_value (TNY_MIME_PART(msg),
 984                                                               "Reply-To");
 985         old_from     = tny_header_dup_from (header);
 986
 987         if (!old_from && !old_reply_to) {
 988                 g_debug ("%s: failed to get either Reply-To: or From: from header",
 989                            __FUNCTION__);
 990                 return NULL;
 991         }
 992
 993         /* Prevent DoS attacks caused by malformed emails */
 994         if (old_from)
 995                 old_from = modest_text_utils_get_secure_header (old_from,
 996                                                                 from_header);
 997         if (old_reply_to)
 998                 old_reply_to = modest_text_utils_get_secure_header (old_reply_to,
 999                                                                     reply_header);
1000
1001         /* for mailing lists, use both Reply-To and From if we did a
1002          * 'Reply All:'
1003          * */
1004         if (is_mailing_list && reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL &&
1005             old_reply_to && old_from && strcmp (old_from, old_reply_to) != 0)
1006                 new_to = g_strjoin (",", old_reply_to, old_from, NULL);
1007         else
1008                 /* otherwise use either Reply-To: (preferred) or From: */
1009                 new_to = g_strdup (old_reply_to ? old_reply_to : old_from);
1010         g_free (old_from);
1011         g_free (old_reply_to);
1012
1013         /* in case of ReplyAll, we need to add the Recipients in the old To: */
1014         if (reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL) {
1015                 gchar *old_to = tny_header_dup_to (header);
1016                 if (!old_to)
1017                         g_debug ("%s: no To: address found in source mail",
1018                                    __FUNCTION__);
1019                 else {
1020                         /* append the old To: */
1021                         gchar *tmp = g_strjoin (",", new_to, old_to, NULL);
1022                         g_free (new_to);
1023                         new_to = tmp;
1024                         g_free (old_to);
1025                 }
1026
1027                 /* remove duplicate entries */
1028                 gchar *tmp = modest_text_utils_remove_duplicate_addresses (new_to);
1029                 g_free (new_to);
1030                 new_to = tmp;
1031
1032                 /* now, strip me (the new From:) from the new_to, but only if
1033                  * there are >1 addresses there */
1034                 if (count_addresses (new_to) > 1) {
1035                         gchar *tmp = modest_text_utils_remove_address (new_to, from);
1036                         g_free (new_to);
1037                         new_to = tmp;
1038                 }
1039         }
1040
1041         tmp = modest_text_utils_simplify_recipients (new_to);
1042         remove_undisclosed_recipients  (&tmp);
1043         g_free (new_to);
1044         new_to = tmp;
1045
1046         return new_to;
1047 }
1048
1049
1050 /* get the new Cc:, based on the old header,
1051  * result is newly allocated or NULL in case of error */
1052 static gchar*
1053 get_new_cc (TnyHeader *header, const gchar* from, const gchar *new_to)
1054 {
1055         gchar *old_cc, *result, *dup;
1056
1057         old_cc = tny_header_dup_cc (header);
1058         if (!old_cc)
1059                 return NULL;
1060
1061         /* remove me (the new From:) from the Cc: list */
1062         dup =  modest_text_utils_remove_address (old_cc, from);
1063
1064         if (new_to) {
1065                 gchar **to_parts, **current;
1066
1067                 to_parts = g_strsplit (new_to, ",", 0);
1068                 for (current = to_parts; current && *current != '\0'; current++) {
1069                         gchar *dup2;
1070
1071                         dup2 = modest_text_utils_remove_address (dup, g_strstrip (*current));
1072                         g_free (dup);
1073                         dup = dup2;
1074                 }
1075                 g_strfreev (to_parts);
1076         }
1077
1078         result = modest_text_utils_remove_duplicate_addresses (dup);
1079         g_free (dup);
1080         dup = result;
1081         result = modest_text_utils_simplify_recipients (dup);
1082         remove_undisclosed_recipients  (&result);
1083         g_free (dup);
1084         g_free (old_cc);
1085         return result;
1086 }
1087
1088 void
1089 modest_tny_msg_get_references (TnyMsg *msg, gchar **message_id, gchar **references, gchar **in_reply_to)
1090 {
1091         TnyList *headers;
1092         TnyIterator *iterator;
1093         gchar *l_message_id;
1094         gchar *l_references;
1095         gchar *l_in_reply_to;
1096
1097         g_return_if_fail (TNY_IS_MSG (msg));
1098
1099         l_message_id = NULL;
1100         l_references = NULL;
1101         l_in_reply_to = NULL;
1102
1103         headers = TNY_LIST (tny_simple_list_new ());
1104         tny_mime_part_get_header_pairs (TNY_MIME_PART (msg), headers);
1105
1106         iterator = tny_list_create_iterator (headers);
1107         while (!tny_iterator_is_done (iterator)) {
1108                 TnyPair *pair;
1109                 const gchar *name;
1110
1111                 pair = TNY_PAIR (tny_iterator_get_current (iterator));
1112                 name = tny_pair_get_name (pair);
1113                 if (!g_ascii_strcasecmp (name, "References")) {
1114                         if (l_references) g_free (l_references);
1115                         l_references = g_strdup (tny_pair_get_value (pair));
1116                 } else if (!g_ascii_strcasecmp (name, "In-Reply-To")) {
1117                         if (l_in_reply_to) g_free (l_in_reply_to);
1118                         l_in_reply_to = g_strdup (tny_pair_get_value (pair));
1119                 } else if (!g_ascii_strcasecmp (name, "Message-ID")) {
1120                         if (l_message_id) g_free (l_message_id);
1121                         l_message_id = g_strdup (tny_pair_get_value (pair));
1122                 }
1123
1124                 g_object_unref (pair);
1125                 tny_iterator_next (iterator);
1126         }
1127
1128         g_object_unref (iterator);
1129         g_object_unref (headers);
1130
1131         if (message_id) {
1132                 *message_id = l_message_id;
1133         } else {
1134                 g_free (l_message_id);
1135         }
1136
1137         if (in_reply_to) {
1138                 *in_reply_to = l_in_reply_to;
1139         } else {
1140                 g_free (l_in_reply_to);
1141         }
1142
1143         if (references) {
1144                 *references = l_references;
1145         } else {
1146                 g_free (l_references);
1147         }
1148 }
1149
1150 static void
1151 set_references (TnyMsg *reply_msg, TnyMsg *original_msg)
1152 {
1153         gchar *orig_references, *orig_in_reply_to, *orig_message_id;
1154         gchar *references, *in_reply_to;
1155
1156         modest_tny_msg_get_references (original_msg, &orig_message_id, &orig_references, &orig_in_reply_to);
1157
1158         references = NULL;
1159         in_reply_to = NULL;
1160
1161         if (orig_message_id)
1162                 in_reply_to = g_strdup (orig_message_id);
1163
1164         if (orig_references) {
1165                 if (orig_message_id)
1166                         references = g_strconcat (orig_references, "\n        ", orig_message_id, NULL);
1167                 else
1168                         references = g_strdup (orig_references);
1169
1170         } else if (orig_in_reply_to) {
1171                 if (orig_message_id)
1172                         references = g_strconcat (orig_in_reply_to, "\n        ", orig_message_id, NULL);
1173                 else
1174                         references = g_strdup (orig_in_reply_to);
1175         } else if (orig_message_id) {
1176                 references = g_strdup (orig_message_id);
1177         }
1178
1179         g_free (orig_references);
1180         g_free (orig_in_reply_to);
1181         g_free (orig_message_id);
1182
1183         if (in_reply_to) {
1184                 tny_mime_part_set_header_pair (TNY_MIME_PART (reply_msg), "In-Reply-To", in_reply_to);
1185         }
1186         if (references) {
1187                 tny_mime_part_set_header_pair (TNY_MIME_PART (reply_msg), "References", references);
1188         }
1189 }
1190
1191 TnyMsg*
1192 modest_tny_msg_create_reply_msg (TnyMsg *msg,
1193                                  TnyHeader *header,
1194                                  const gchar *from,
1195                                  const gchar *signature,
1196                                  ModestTnyMsgReplyType reply_type,
1197                                  ModestTnyMsgReplyMode reply_mode)
1198 {
1199         TnyMsg *new_msg = NULL;
1200         TnyHeader *new_header;
1201         gchar *new_to = NULL;
1202         TnyList *parts = NULL;
1203         GList *attachments_list = NULL;
1204         TnyMimePart *part_to_check = NULL;
1205
1206         g_return_val_if_fail (msg && TNY_IS_MSG(msg), NULL);
1207
1208         part_to_check = modest_tny_msg_get_attachments_parent (TNY_MSG (msg));
1209
1210         parts = TNY_LIST (tny_simple_list_new());
1211         tny_mime_part_get_parts (TNY_MIME_PART (part_to_check), parts);
1212         tny_list_foreach (parts, add_if_attachment, &attachments_list);
1213
1214         new_msg = create_reply_forward_mail (msg, header, from, signature, TRUE, reply_type,
1215                                              attachments_list);
1216
1217         set_references (new_msg, msg);
1218         if (attachments_list != NULL) {
1219                 g_list_foreach (attachments_list, (GFunc) g_object_unref, NULL);
1220                 g_list_free (attachments_list);
1221         }
1222         g_object_unref (parts);
1223
1224         /* Fill the header */
1225         if (header)
1226                 g_object_ref (header);
1227         else
1228                 header = tny_msg_get_header (msg);
1229
1230
1231         new_header = tny_msg_get_header(new_msg);
1232         new_to = get_new_to (msg, header, from, reply_mode);
1233         if (!new_to)
1234                 g_debug ("%s: failed to get new To:", __FUNCTION__);
1235         else {
1236                 tny_header_set_to (new_header, new_to);
1237         }
1238
1239         if (reply_mode == MODEST_TNY_MSG_REPLY_MODE_ALL) {
1240                 gchar *new_cc = get_new_cc (header, from, new_to);
1241                 if (new_cc) {
1242                         tny_header_set_cc (new_header, new_cc);
1243                         g_free (new_cc);
1244                 }
1245         }
1246
1247         if (new_to)
1248                 g_free (new_to);
1249
1250         /* Clean */
1251         g_object_unref (G_OBJECT (new_header));
1252         g_object_unref (G_OBJECT (header));
1253         g_object_unref (G_OBJECT (part_to_check));
1254
1255         return new_msg;
1256 }
1257
1258
1259 static gboolean
1260 is_ascii(const gchar *s)
1261 {
1262         if (!s)
1263                 return TRUE;
1264         while (s[0]) {
1265                 if (s[0] & 128 || s[0] < 32)
1266                         return FALSE;
1267                 s++;
1268         }
1269         return TRUE;
1270 }
1271
1272 static char *
1273 get_content_type(const gchar *s)
1274 {
1275         GString *type;
1276
1277         type = g_string_new("text/plain");
1278         if (!is_ascii(s)) {
1279                 if (g_utf8_validate(s, -1, NULL)) {
1280                         g_string_append(type, "; charset=\"utf-8\"");
1281                 } else {
1282                         /* it should be impossible to reach this, but better safe than sorry */
1283                         g_debug("invalid utf8 in message");
1284                         g_string_append(type, "; charset=\"latin1\"");
1285                 }
1286         }
1287         return g_string_free(type, FALSE);
1288 }
1289
1290 guint64
1291 modest_tny_msg_estimate_size (const gchar *plain_body, const gchar *html_body,
1292                               guint64 parts_count,
1293                               guint64 parts_size)
1294 {
1295         guint64 result;
1296
1297         /* estimation of headers size */
1298         result = 1024;
1299
1300         /* We add a 20% of size due to the increase in 7bit encoding */
1301         if (plain_body) {
1302                 result += strlen (plain_body) * 120 / 100;
1303         }
1304         if (html_body) {
1305                 result += strlen (html_body) * 120 / 100;
1306         }
1307
1308         /* 256 bytes per additional part because of their headers */
1309         result += parts_count * 256;
1310
1311         /* 150% of increase per encoding */
1312         result += parts_size * 3 / 2;
1313
1314         return result;
1315 }
1316
1317 GSList *
1318 modest_tny_msg_header_get_all_recipients_list (TnyHeader *header)
1319 {
1320         GSList *recipients = NULL;
1321         gchar *from = NULL, *to = NULL, *cc = NULL, *bcc = NULL;
1322         gchar *after_remove;
1323         GString *buffer;
1324         gboolean add_separator = TRUE;
1325
1326         if (header == NULL)
1327                 return NULL;
1328
1329         buffer = g_string_new ("");
1330
1331         from = tny_header_dup_from (header);
1332         to = tny_header_dup_to (header);
1333         cc = tny_header_dup_cc (header);
1334         bcc = tny_header_dup_bcc (header);
1335
1336         recipients = NULL;
1337         if (from) {
1338                 buffer = g_string_append (buffer, from);
1339                 add_separator = TRUE;
1340         }
1341         if (to) {
1342                 if (add_separator)
1343                         buffer = g_string_append (buffer, "; ");
1344                 else
1345                         add_separator = TRUE;
1346
1347                 buffer = g_string_append (buffer, to);
1348         }
1349         if (cc) {
1350                 if (add_separator)
1351                         buffer = g_string_append (buffer, "; ");
1352                 else
1353                         add_separator = TRUE;
1354
1355                 buffer = g_string_append (buffer, cc);
1356         }
1357         if (bcc) {
1358                 if (add_separator)
1359                         buffer = g_string_append (buffer, "; ");
1360                 else
1361                         add_separator = TRUE;
1362
1363                 buffer = g_string_append (buffer, bcc);
1364         }
1365
1366         after_remove = modest_text_utils_remove_duplicate_addresses (buffer->str);
1367         g_string_free (buffer, TRUE);
1368
1369         recipients = modest_text_utils_split_addresses_list (after_remove);
1370         g_free (after_remove);
1371
1372         return recipients;
1373 }
1374
1375 GSList *
1376 modest_tny_msg_get_all_recipients_list (TnyMsg *msg)
1377 {
1378         TnyHeader *header = NULL;
1379         GSList *recipients = NULL;
1380
1381         if (msg == NULL)
1382                 return NULL;
1383
1384         header = tny_msg_get_header (msg);
1385         if (header == NULL)
1386                 return NULL;
1387
1388         recipients = modest_tny_msg_header_get_all_recipients_list (header);
1389         g_object_unref (header);
1390
1391         return recipients;
1392 }
1393