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