src/filtering.c

   1 /*
   2  * Sylpheed -- a GTK+ based, lightweight, and fast e-mail client
   3  * Copyright (C) 1999-2006 Hiroyuki Yamamoto & The Sylpheed Claws Team
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  */
  19
  20 #include "defs.h"
  21 #include <glib.h>
  22 #include <glib/gi18n.h>
  23 #include <ctype.h>
  24 #include <string.h>
  25 #include <stdlib.h>
  26 #include <errno.h>
  27 #include <gtk/gtk.h>
  28 #include <stdio.h>
  29
  30 #include "utils.h"
  31 #include "procheader.h"
  32 #include "matcher.h"
  33 #include "filtering.h"
  34 #include "prefs_gtk.h"
  35 #include "compose.h"
  36
  37 #define PREFSBUFSIZE            1024
  38
  39 GSList * pre_global_processing = NULL;
  40 GSList * post_global_processing = NULL;
  41 GSList * filtering_rules = NULL;
  42
  43 static gboolean filtering_is_final_action(FilteringAction *filtering_action);
  44
  45 #define STRLEN_WITH_CHECK(expr) \
  46         strlen_with_check(#expr, __LINE__, expr)
  47
  48 static inline gint strlen_with_check(const gchar *expr, gint fline, const gchar *str)
  49 {
  50         if (str)
  51                 return strlen(str);
  52         else {
  53                 debug_print("%s(%d) - invalid string %s\n", __FILE__, fline, expr);
  54                 return 0;
  55         }
  56 }
  57
  58 FilteringAction * filteringaction_new(int type, int account_id,
  59                                       gchar * destination,
  60                                       gint labelcolor, gint score)
  61 {
  62         FilteringAction * action;
  63
  64         action = g_new0(FilteringAction, 1);
  65
  66         action->type = type;
  67         action->account_id = account_id;
  68         if (destination) {
  69                 action->destination       = g_strdup(destination);
  70         } else {
  71                 action->destination       = NULL;
  72         }
  73         action->labelcolor = labelcolor;
  74         action->score = score;
  75         return action;
  76 }
  77
  78 void filteringaction_free(FilteringAction * action)
  79 {
  80         g_return_if_fail(action);
  81         if (action->destination)
  82                 g_free(action->destination);
  83         g_free(action);
  84 }
  85
  86 FilteringProp * filteringprop_new(const gchar *name,
  87                                   MatcherList * matchers,
  88                                   GSList * action_list)
  89 {
  90         FilteringProp * filtering;
  91
  92         filtering = g_new0(FilteringProp, 1);
  93         filtering->name = name ? g_strdup(name): NULL;
  94         filtering->matchers = matchers;
  95         filtering->action_list = action_list;
  96
  97         return filtering;
  98 }
  99
 100 static FilteringAction * filteringaction_copy(FilteringAction * src)
 101 {
 102         FilteringAction * new;
 103
 104         new = g_new0(FilteringAction, 1);
 105
 106         new->type = src->type;
 107         new->account_id = src->account_id;
 108         if (src->destination)
 109                 new->destination = g_strdup(src->destination);
 110         else
 111                 new->destination = NULL;
 112         new->labelcolor = src->labelcolor;
 113         new->score = src->score;
 114
 115         return new;
 116 }
 117
 118 FilteringProp * filteringprop_copy(FilteringProp *src)
 119 {
 120         FilteringProp * new;
 121         GSList *tmp;
 122
 123         new = g_new0(FilteringProp, 1);
 124         new->matchers = g_new0(MatcherList, 1);
 125
 126         for (tmp = src->matchers->matchers; tmp != NULL && tmp->data != NULL;) {
 127                 MatcherProp *matcher = (MatcherProp *)tmp->data;
 128
 129                 new->matchers->matchers = g_slist_append(new->matchers->matchers,
 130                                                    matcherprop_copy(matcher));
 131                 tmp = tmp->next;
 132         }
 133
 134         new->matchers->bool_and = src->matchers->bool_and;
 135
 136         new->action_list = NULL;
 137
 138         for (tmp = src->action_list ; tmp != NULL ; tmp = tmp->next) {
 139                 FilteringAction *filtering_action;
 140
 141                 filtering_action = tmp->data;
 142
 143                 new->action_list = g_slist_append(new->action_list,
 144                     filteringaction_copy(filtering_action));
 145         }
 146
 147         new->name = g_strdup(src->name);
 148
 149         return new;
 150 }
 151
 152 void filteringprop_free(FilteringProp * prop)
 153 {
 154         GSList * tmp;
 155
 156         g_return_if_fail(prop);
 157         matcherlist_free(prop->matchers);
 158
 159         for (tmp = prop->action_list ; tmp != NULL ; tmp = tmp->next) {
 160                 filteringaction_free(tmp->data);
 161         }
 162         g_free(prop->name);
 163         g_free(prop);
 164 }
 165
 166 void filtering_move_and_copy_msg(MsgInfo *msginfo)
 167 {
 168         GSList *list = g_slist_append(NULL, msginfo);
 169         filtering_move_and_copy_msgs(list);
 170         g_slist_free(list);
 171 }
 172
 173 /* move and copy messages by batches to be faster on IMAP */
 174 void filtering_move_and_copy_msgs(GSList *msgs)
 175 {
 176         GSList *messages = g_slist_copy(msgs);
 177         FolderItem *last_item = NULL;
 178         gboolean is_copy = FALSE, is_move = FALSE;
 179
 180         while (messages) {
 181                 GSList *batch = NULL, *cur;
 182                 gint found = 0;
 183                 debug_print("%d messages to filter\n", g_slist_length(messages));
 184                 for (cur = messages; cur; cur = cur->next) {
 185                         MsgInfo *info = (MsgInfo *)cur->data;
 186                         if (last_item == NULL) {
 187                                 last_item = info->to_folder;
 188                         }
 189                         if (last_item == NULL)
 190                                 continue;
 191                         debug_print("for %s\n", folder_item_get_path(last_item));
 192                         if (!is_copy && !is_move) {
 193                                 if (info->is_copy)
 194                                         is_copy = TRUE;
 195                                 else if (info->is_move)
 196                                         is_move = TRUE;
 197                         }
 198                         found++;
 199                         if (info->to_folder == last_item
 200                         &&  info->is_copy == is_copy
 201                         &&  info->is_move == is_move) {
 202                                 batch = g_slist_append(batch, info);
 203                         }
 204                 }
 205                 if (found == 0) {
 206                         debug_print("no more messages to move/copy\n");
 207                         break;
 208                 }
 209                 for (cur = batch; cur; cur = cur->next) {
 210                         MsgInfo *info = (MsgInfo *)cur->data;
 211                         messages = g_slist_remove(messages, info);
 212                 }
 213                 if (g_slist_length(batch)) {
 214                         MsgInfo *info = (MsgInfo *)batch->data;
 215                         debug_print("%s %d messages to %s\n",
 216                                 is_copy?"copying":"moving",
 217                                 g_slist_length(batch),
 218                                 folder_item_get_path(last_item));
 219                         if (is_copy && last_item != info->folder) {
 220                                 folder_item_copy_msgs(last_item, batch);
 221                         } else if (is_move && last_item != info->folder) {
 222                                 if (folder_item_move_msgs(last_item, batch) < 0)
 223                                         folder_item_move_msgs(
 224                                                 folder_get_default_inbox(),
 225                                                 batch);
 226                         }
 227                         /* we don't reference the msginfos, because caller will do */
 228                         g_slist_free(batch);
 229                         batch = NULL;
 230                 }
 231                 last_item = NULL;
 232                 is_copy = FALSE;
 233                 is_move = FALSE;
 234                 debug_print("%d messages remaining\n", g_slist_length(messages));
 235         }
 236         /* we don't reference the msginfos, because caller will do */
 237         g_slist_free(messages);
 238 }
 239
 240 /*
 241   fitleringaction_apply
 242   runs the action on one MsgInfo
 243   return value : return TRUE if the action could be applied
 244 */
 245
 246 static gboolean filteringaction_apply(FilteringAction * action, MsgInfo * info)
 247 {
 248         FolderItem * dest_folder;
 249         gint val;
 250         Compose * compose;
 251         PrefsAccount * account;
 252         gchar * cmd;
 253
 254         switch(action->type) {
 255         case MATCHACTION_MOVE:
 256                 dest_folder =
 257                         folder_find_item_from_identifier(action->destination);
 258                 if (!dest_folder) {
 259                         debug_print("*** folder not found '%s'\n",
 260                                 action->destination ?action->destination :"");
 261                         return FALSE;
 262                 }
 263
 264                 /* mark message to be moved */
 265                 info->is_move = TRUE;
 266                 info->to_folder = dest_folder;
 267                 debug_print("set to move to %s\n", folder_item_get_path(dest_folder));
 268                 return TRUE;
 269
 270         case MATCHACTION_COPY:
 271                 dest_folder =
 272                         folder_find_item_from_identifier(action->destination);
 273
 274                 if (!dest_folder) {
 275                         debug_print("*** folder not found '%s'\n",
 276                                 action->destination ?action->destination :"");
 277                         return FALSE;
 278                 }
 279
 280                 /* mark message to be copied */
 281                 info->is_copy = TRUE;
 282                 info->to_folder = dest_folder;
 283                 debug_print("set to copy to %s\n", folder_item_get_path(dest_folder));
 284                 return TRUE;
 285
 286         case MATCHACTION_DELETE:
 287                 if (folder_item_remove_msg(info->folder, info->msgnum) == -1)
 288                         return FALSE;
 289                 return TRUE;
 290
 291         case MATCHACTION_MARK:
 292                 procmsg_msginfo_set_flags(info, MSG_MARKED, 0);
 293                 return TRUE;
 294
 295         case MATCHACTION_UNMARK:
 296                 procmsg_msginfo_unset_flags(info, MSG_MARKED, 0);
 297                 return TRUE;
 298
 299         case MATCHACTION_LOCK:
 300                 procmsg_msginfo_set_flags(info, MSG_LOCKED, 0);
 301                 return TRUE;
 302
 303         case MATCHACTION_UNLOCK:
 304                 procmsg_msginfo_unset_flags(info, MSG_LOCKED, 0);
 305                 return TRUE;
 306
 307         case MATCHACTION_MARK_AS_READ:
 308                 procmsg_msginfo_unset_flags(info, MSG_UNREAD | MSG_NEW, 0);
 309                 return TRUE;
 310
 311         case MATCHACTION_MARK_AS_UNREAD:
 312                 procmsg_msginfo_set_flags(info, MSG_UNREAD | MSG_NEW, 0);
 313                 return TRUE;
 314
 315         case MATCHACTION_COLOR:
 316                 procmsg_msginfo_unset_flags(info, MSG_CLABEL_FLAG_MASK, 0);
 317                 procmsg_msginfo_set_flags(info, MSG_COLORLABEL_TO_FLAGS(action->labelcolor), 0);
 318                 return TRUE;
 319
 320         case MATCHACTION_FORWARD:
 321         case MATCHACTION_FORWARD_AS_ATTACHMENT:
 322                 account = account_find_from_id(action->account_id);
 323                 compose = compose_forward(account, info,
 324                         action->type == MATCHACTION_FORWARD ? FALSE : TRUE,
 325                         NULL, TRUE);
 326                 compose_entry_append(compose, action->destination,
 327                                      compose->account->protocol == A_NNTP
 328                                             ? COMPOSE_NEWSGROUPS
 329                                             : COMPOSE_TO);
 330
 331                 val = compose_send(compose);
 332
 333                 return val == 0 ? TRUE : FALSE;
 334
 335         case MATCHACTION_REDIRECT:
 336                 account = account_find_from_id(action->account_id);
 337                 compose = compose_redirect(account, info);
 338                 if (compose->account->protocol == A_NNTP)
 339                         break;
 340                 else
 341                         compose_entry_append(compose, action->destination,
 342                                              COMPOSE_TO);
 343
 344                 val = compose_send(compose);
 345
 346                 return val == 0 ? TRUE : FALSE;
 347
 348         case MATCHACTION_EXECUTE:
 349                 cmd = matching_build_command(action->destination, info);
 350                 if (cmd == NULL)
 351                         return FALSE;
 352                 else {
 353                         system(cmd);
 354                         g_free(cmd);
 355                 }
 356                 return TRUE;
 357
 358         case MATCHACTION_SET_SCORE:
 359                 info->score = action->score;
 360                 return TRUE;
 361
 362         case MATCHACTION_CHANGE_SCORE:
 363                 info->score += action->score;
 364                 return TRUE;
 365
 366         case MATCHACTION_STOP:
 367                 return FALSE;
 368
 369         case MATCHACTION_HIDE:
 370                 info->hidden = TRUE;
 371                 return TRUE;
 372
 373         default:
 374                 break;
 375         }
 376         return FALSE;
 377 }
 378
 379 gboolean filteringaction_apply_action_list(GSList *action_list, MsgInfo *info)
 380 {
 381         GSList *p;
 382         g_return_val_if_fail(action_list, FALSE);
 383         g_return_val_if_fail(info, FALSE);
 384         for (p = action_list; p && p->data; p = g_slist_next(p)) {
 385                 FilteringAction *a = (FilteringAction *) p->data;
 386                 if (filteringaction_apply(a, info)) {
 387                         if (filtering_is_final_action(a))
 388                                 break;
 389                 } else
 390                         return FALSE;
 391
 392         }
 393         return TRUE;
 394 }
 395
 396 static gboolean filtering_match_condition(FilteringProp *filtering, MsgInfo *info)
 397 {
 398         return matcherlist_match(filtering->matchers, info);
 399 }
 400
 401 /*!
 402  *\brief        Apply a rule on message.
 403  *
 404  *\param        filtering List of filtering rules.
 405  *\param        info Message to apply rules on.
 406  *\param        final Variable returning TRUE or FALSE if one of the
 407  *              encountered actions was final.
 408  *              See also \ref filtering_is_final_action.
 409  *
 410  *\return       gboolean TRUE to continue applying rules.
 411  */
 412 static gboolean filtering_apply_rule(FilteringProp *filtering, MsgInfo *info,
 413     gboolean * final)
 414 {
 415         gboolean result = TRUE;
 416         gchar    buf[50];
 417         GSList * tmp;
 418
 419         * final = FALSE;
 420         for (tmp = filtering->action_list ; tmp != NULL ; tmp = tmp->next) {
 421                 FilteringAction * action;
 422
 423                 action = tmp->data;
 424
 425                 if (FALSE == (result = filteringaction_apply(action, info))) {
 426                         g_warning("No further processing after rule %s\n",
 427                             filteringaction_to_string(buf, sizeof buf, action));
 428                 }
 429
 430                 if (filtering_is_final_action(action)) {
 431                         * final = TRUE;
 432                         break;
 433                 }
 434         }
 435         return result;
 436 }
 437
 438 /*!
 439  *\brief        Check if an action is "final", i.e. should break further
 440  *              processing.
 441  *
 442  *\param        filtering_action Action to check.
 443  *
 444  *\return       gboolean TRUE if \a filtering_action is final.
 445  */
 446 static gboolean filtering_is_final_action(FilteringAction *filtering_action)
 447 {
 448         switch(filtering_action->type) {
 449         case MATCHACTION_MOVE:
 450         case MATCHACTION_DELETE:
 451         case MATCHACTION_STOP:
 452                 return TRUE; /* MsgInfo invalid for message */
 453         default:
 454                 return FALSE;
 455         }
 456 }
 457
 458 static gboolean filter_msginfo(GSList * filtering_list, MsgInfo * info)
 459 {
 460         GSList  *l;
 461         gboolean final;
 462         gboolean apply_next;
 463
 464         g_return_val_if_fail(info != NULL, TRUE);
 465
 466         for (l = filtering_list, final = FALSE, apply_next = FALSE; l != NULL; l = g_slist_next(l)) {
 467                 FilteringProp * filtering = (FilteringProp *) l->data;
 468
 469                 if (filtering_match_condition(filtering, info)) {
 470                         apply_next = filtering_apply_rule(filtering, info, &final);
 471                         if (final)
 472                                 break;
 473                 }
 474         }
 475
 476         /* put in inbox if a final rule could not be applied, or
 477          * the last rule was not a final one. */
 478         if ((final && !apply_next) || !final) {
 479                 return FALSE;
 480         }
 481
 482         return TRUE;
 483 }
 484
 485 /*!
 486  *\brief        Filter a message against a list of rules.
 487  *
 488  *\param        flist List of filter rules.
 489  *\param        info Message.
 490  *
 491  *\return       gboolean TRUE if filter rules handled the message.
 492  *
 493  *\note         Returning FALSE means the message was not handled,
 494  *              and that the calling code should do the default
 495  *              processing. E.g. \ref inc.c::inc_start moves the
 496  *              message to the inbox.
 497  */
 498 gboolean filter_message_by_msginfo(GSList *flist, MsgInfo *info)
 499 {
 500         return filter_msginfo(flist, info);
 501 }
 502
 503 gchar *filteringaction_to_string(gchar *dest, gint destlen, FilteringAction *action)
 504 {
 505         const gchar *command_str;
 506         gchar * quoted_dest;
 507
 508         command_str = get_matchparser_tab_str(action->type);
 509
 510         if (command_str == NULL)
 511                 return NULL;
 512
 513         switch(action->type) {
 514         case MATCHACTION_MOVE:
 515         case MATCHACTION_COPY:
 516         case MATCHACTION_EXECUTE:
 517                 quoted_dest = matcher_quote_str(action->destination);
 518                 g_snprintf(dest, destlen, "%s \"%s\"", command_str, quoted_dest);
 519                 g_free(quoted_dest);
 520                 return dest;
 521
 522         case MATCHACTION_DELETE:
 523         case MATCHACTION_MARK:
 524         case MATCHACTION_UNMARK:
 525         case MATCHACTION_LOCK:
 526         case MATCHACTION_UNLOCK:
 527         case MATCHACTION_MARK_AS_READ:
 528         case MATCHACTION_MARK_AS_UNREAD:
 529         case MATCHACTION_STOP:
 530         case MATCHACTION_HIDE:
 531                 g_snprintf(dest, destlen, "%s", command_str);
 532                 return dest;
 533
 534         case MATCHACTION_REDIRECT:
 535         case MATCHACTION_FORWARD:
 536         case MATCHACTION_FORWARD_AS_ATTACHMENT:
 537                 quoted_dest = matcher_quote_str(action->destination);
 538                 g_snprintf(dest, destlen, "%s %d \"%s\"", command_str, action->account_id, quoted_dest);
 539                 g_free(quoted_dest);
 540                 return dest;
 541
 542         case MATCHACTION_COLOR:
 543                 g_snprintf(dest, destlen, "%s %d", command_str, action->labelcolor);
 544                 return dest;
 545
 546         case MATCHACTION_CHANGE_SCORE:
 547         case MATCHACTION_SET_SCORE:
 548                 g_snprintf(dest, destlen, "%s %d", command_str, action->score);
 549                 return dest;
 550
 551         default:
 552                 return NULL;
 553         }
 554 }
 555
 556 gchar * filteringaction_list_to_string(GSList * action_list)
 557 {
 558         gchar *action_list_str;
 559         gchar  buf[256];
 560         GSList * tmp;
 561         gchar *list_str;
 562
 563         action_list_str = NULL;
 564         for (tmp = action_list ; tmp != NULL ; tmp = tmp->next) {
 565                 gchar *action_str;
 566                 FilteringAction * action;
 567
 568                 action = tmp->data;
 569
 570                 action_str = filteringaction_to_string(buf,
 571                     sizeof buf, action);
 572
 573                 if (action_list_str != NULL) {
 574                         list_str = g_strconcat(action_list_str, " ", action_str, NULL);
 575                         g_free(action_list_str);
 576                 }
 577                 else {
 578                         list_str = g_strdup(action_str);
 579                 }
 580                 action_list_str = list_str;
 581         }
 582
 583         return action_list_str;
 584 }
 585
 586 gchar * filteringprop_to_string(FilteringProp * prop)
 587 {
 588         gchar *list_str;
 589         gchar *action_list_str;
 590         gchar *filtering_str;
 591
 592         action_list_str = filteringaction_list_to_string(prop->action_list);
 593
 594         if (action_list_str == NULL)
 595                 return NULL;
 596
 597         list_str = matcherlist_to_string(prop->matchers);
 598
 599         if (list_str == NULL) {
 600                 g_free(action_list_str);
 601                 return NULL;
 602         }
 603
 604         filtering_str = g_strconcat(list_str, " ", action_list_str, NULL);
 605         g_free(action_list_str);
 606         g_free(list_str);
 607
 608         return filtering_str;
 609 }
 610
 611 void prefs_filtering_free(GSList * prefs_filtering)
 612 {
 613         while (prefs_filtering != NULL) {
 614                 FilteringProp * filtering = (FilteringProp *)
 615                         prefs_filtering->data;
 616                 filteringprop_free(filtering);
 617                 prefs_filtering = g_slist_remove(prefs_filtering, filtering);
 618         }
 619 }
 620
 621 static gboolean prefs_filtering_free_func(GNode *node, gpointer data)
 622 {
 623         FolderItem *item = node->data;
 624
 625         g_return_val_if_fail(item, FALSE);
 626         g_return_val_if_fail(item->prefs, FALSE);
 627
 628         prefs_filtering_free(item->prefs->processing);
 629         item->prefs->processing = NULL;
 630
 631         return FALSE;
 632 }
 633
 634 void prefs_filtering_clear(void)
 635 {
 636         GList * cur;
 637
 638         for (cur = folder_get_list() ; cur != NULL ; cur = g_list_next(cur)) {
 639                 Folder *folder;
 640
 641                 folder = (Folder *) cur->data;
 642                 g_node_traverse(folder->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 643                                 prefs_filtering_free_func, NULL);
 644         }
 645
 646         prefs_filtering_free(filtering_rules);
 647         filtering_rules = NULL;
 648         prefs_filtering_free(pre_global_processing);
 649         pre_global_processing = NULL;
 650         prefs_filtering_free(post_global_processing);
 651         post_global_processing = NULL;
 652 }
 653
 654 void prefs_filtering_clear_folder(Folder *folder)
 655 {
 656         g_return_if_fail(folder);
 657         g_return_if_fail(folder->node);
 658
 659         g_node_traverse(folder->node, G_PRE_ORDER, G_TRAVERSE_ALL, -1,
 660                         prefs_filtering_free_func, NULL);
 661         /* FIXME: Note folder settings were changed, where the updates? */
 662 }
 663