git.marmaro.de Git - mmh/blob - uip/new.c

   1 /*
   2 ** new.c -- as new,    list all folders with unseen messages
   3 **       -- as fnext,  move to next folder with unseen messages
   4 **       -- as fprev,  move to previous folder with unseen messages
   5 **       -- as unseen, scan all unseen messages
   6 ** This code is Copyright (c) 2008, by the authors of nmh.  See the
   7 ** COPYRIGHT file in the root directory of the nmh distribution for
   8 ** complete copyright information.
   9 **
  10 ** Inspired by Luke Mewburn's new: http://www.mewburn.net/luke/src/new
  11 */
  12
  13 #include <sys/types.h>
  14
  15 #include <stdio.h>
  16 #include <stdlib.h>
  17 #include <string.h>
  18
  19 #include <h/mh.h>
  20 #include <h/crawl_folders.h>
  21 #include <h/utils.h>
  22
  23 static struct swit switches[] = {
  24 #define MODESW 0
  25         { "mode", 1 },
  26 #define FOLDERSSW 1
  27         { "folders", 1 },
  28 #define VERSIONSW 2
  29         { "version", 1 },
  30 #define HELPSW 3
  31         { "help", 1 },
  32         { NULL, 0 }
  33 };
  34
  35 static enum { NEW, FNEXT, FPREV, UNSEEN } run_mode = NEW;
  36
  37 /*
  38 ** check_folders uses this to maintain state with both .folders list of
  39 ** folders and with crawl_folders.
  40 */
  41 struct list_state {
  42         struct node **first, **cur_node;
  43         size_t *maxlen;
  44         char *cur;
  45         char **sequences;
  46         struct node *node;
  47 };
  48
  49 /* Return the number of messages in a string list of message numbers. */
  50 static int
  51 count_messages(char *field)
  52 {
  53         int total = 0;
  54         int j, k;
  55         char *cp, **ap;
  56
  57         field = getcpy(field);
  58
  59         /* copied from seq_read.c:seq_init */
  60         for (ap = brkstring (field, " ", "\n"); *ap; ap++) {
  61                 if ((cp = strchr(*ap, '-')))
  62                         *cp++ = '\0';
  63                 if ((j = m_atoi (*ap)) > 0) {
  64                         k = cp ? m_atoi (cp) : j;
  65
  66                         total += k - j + 1;
  67                 }
  68         }
  69
  70         free(field);
  71
  72         return total;
  73 }
  74
  75 /* Return TRUE if the sequence 'name' is in 'sequences'. */
  76 static boolean
  77 seq_in_list(char *name, char *sequences[])
  78 {
  79         int i;
  80
  81         for (i = 0; sequences[i] != NULL; i++) {
  82                 if (strcmp(name, sequences[i]) == 0) {
  83                         return TRUE;
  84                 }
  85         }
  86
  87         return FALSE;
  88 }
  89
  90 /*
  91 ** Return the string list of message numbers from the sequences file,
  92 ** or NULL if none.
  93 */
  94 static char *
  95 get_msgnums(char *folder, char *sequences[])
  96 {
  97         char *seqfile = concat(m_maildir(folder), "/", mh_seq, (void *)NULL);
  98         FILE *fp = fopen(seqfile, "r");
  99         int state;
 100         char name[NAMESZ], field[BUFSIZ];
 101         char *cp;
 102         char *msgnums = NULL, *this_msgnums, *old_msgnums;
 103
 104         /* no sequences file -> no messages */
 105         if (fp == NULL) {
 106                 return NULL;
 107         }
 108
 109         /* copied from seq_read.c:seq_public */
 110         for (state = FLD;;) {
 111                 switch (state = m_getfld (state, name, field, sizeof(field), fp)) {
 112                         case FLD:
 113                         case FLDPLUS:
 114                         case FLDEOF:
 115                                 if (state == FLDPLUS) {
 116                                         cp = getcpy (field);
 117                                         while (state == FLDPLUS) {
 118                                                 state = m_getfld (state, name,
 119                                                                 field,
 120                                                                 sizeof(field),
 121                                                                 fp);
 122                                                 cp = add (field, cp);
 123                                         }
 124
 125                                         /*
 126                                         ** Here's where we differ from
 127                                         ** seq_public: if it's in a
 128                                         ** sequence we want, save the list
 129                                         ** of messages.
 130                                         */
 131                                         if (seq_in_list(name, sequences)) {
 132                                                 this_msgnums = trimcpy(cp);
 133                                                 if (msgnums == NULL) {
 134                                                         msgnums = this_msgnums;
 135                                                 } else {
 136                                                         old_msgnums = msgnums;
 137                                                         msgnums = concat(old_msgnums, " ", this_msgnums, (void *)NULL);
 138                                                         free(old_msgnums);
 139                                                         free(this_msgnums);
 140                                                 }
 141                                         }
 142                                         free (cp);
 143                                 } else {
 144                                         /* and here */
 145                                         if (seq_in_list(name, sequences)) {
 146                                                 this_msgnums = trimcpy(field);
 147                                                 if (msgnums == NULL) {
 148                                                         msgnums = this_msgnums;
 149                                                 } else {
 150                                                         old_msgnums = msgnums;
 151                                                         msgnums = concat(old_msgnums, " ", this_msgnums, (void *)NULL);
 152                                                         free(old_msgnums);
 153                                                         free(this_msgnums);
 154                                                 }
 155                                         }
 156                                 }
 157
 158                                 if (state == FLDEOF)
 159                                         break;
 160                                 continue;
 161
 162                         case BODY:
 163                         case BODYEOF:
 164                                 adios (NULL, "no blank lines are permitted in %s", seqfile);
 165                                 /* fall */
 166
 167                         case FILEEOF:
 168                                 break;
 169
 170                         default:
 171                                 adios (NULL, "%s is poorly formatted", seqfile);
 172                 }
 173                 break;  /* break from for loop */
 174         }
 175
 176         fclose(fp);
 177
 178         return msgnums;
 179 }
 180
 181 /*
 182 ** Check `folder' (of length `len') for interesting messages,
 183 ** filling in the list in `b'.
 184 */
 185 static void
 186 check_folder(char *folder, size_t len, struct list_state *b)
 187 {
 188         char *msgnums = get_msgnums(folder, b->sequences);
 189         int is_cur = strcmp(folder, b->cur) == 0;
 190
 191         if (is_cur || msgnums != NULL) {
 192                 if (*b->first == NULL) {
 193                         *b->first = b->node = mh_xmalloc(sizeof(*b->node));
 194                 } else {
 195                         b->node->n_next = mh_xmalloc(sizeof(*b->node));
 196                         b->node = b->node->n_next;
 197                 }
 198                 b->node->n_name = folder;
 199                 b->node->n_field = msgnums;
 200
 201                 if (*b->maxlen < len) {
 202                         *b->maxlen = len;
 203                 }
 204         }
 205
 206         /* Save the node for the current folder, so we can fall back to it. */
 207         if (is_cur) {
 208                 *b->cur_node = b->node;
 209         }
 210 }
 211
 212 static boolean
 213 crawl_callback(char *folder, void *baton)
 214 {
 215         check_folder(folder, strlen(folder), baton);
 216         return TRUE;
 217 }
 218
 219 /*
 220 ** Scan folders, returning:
 221 ** first        -- list of nodes for all folders which have desired messages;
 222 **                 if the current folder is listed in .folders, it is also in
 223 **                 the list regardless of whether it has any desired messages
 224 ** last         -- last node in list
 225 ** cur_node     -- node of current folder, if listed in .folders
 226 ** maxlen       -- length of longest folder name
 227 **
 228 ** `cur' points to the name of the current folder, `folders' points to the
 229 ** name of a .folder (if NULL, crawl all folders), and `sequences' points to
 230 ** the array of sequences for which to look.
 231 **
 232 ** An empty list is returned as first=last=NULL.
 233 */
 234 static void
 235 check_folders(struct node **first, struct node **last,
 236         struct node **cur_node, size_t *maxlen,
 237         char *cur, char *folders, char *sequences[])
 238 {
 239         struct list_state b;
 240         FILE *fp;
 241         char *line;
 242         size_t len;
 243
 244         *first = *last = *cur_node = NULL;
 245         *maxlen = 0;
 246
 247         b.first = first;
 248         b.cur_node = cur_node;
 249         b.maxlen = maxlen;
 250         b.cur = cur;
 251         b.sequences = sequences;
 252
 253         if (folders == NULL) {
 254                 chdir(m_maildir(""));
 255                 crawl_folders(".", crawl_callback, &b);
 256         } else {
 257                 fp = fopen(folders, "r");
 258                 if (fp  == NULL) {
 259                         adios(NULL, "failed to read %s", folders);
 260                 }
 261                 while (vfgets(fp, &line) == OK) {
 262                         len = strlen(line) - 1;
 263                         line[len] = '\0';
 264                         check_folder(getcpy(line), len, &b);
 265                 }
 266                 fclose(fp);
 267         }
 268
 269         if (*first != NULL) {
 270                 b.node->n_next = NULL;
 271                 *last = b.node;
 272         }
 273 }
 274
 275 /* Return a single string of the `sequences' joined by a space (' '). */
 276 static char *
 277 join_sequences(char *sequences[])
 278 {
 279         int i;
 280         size_t len = 0;
 281         char *result, *cp;
 282
 283         for (i = 0; sequences[i] != NULL; i++) {
 284                 len += strlen(sequences[i]) + 1;
 285         }
 286         result = mh_xmalloc(len + 1);
 287
 288         for (i = 0, cp = result; sequences[i] != NULL; i++, cp += len + 1) {
 289                 len = strlen(sequences[i]);
 290                 memcpy(cp, sequences[i], len);
 291                 cp[len] = ' ';
 292         }
 293         /* -1 to overwrite the last delimiter */
 294         *--cp = '\0';
 295
 296         return result;
 297 }
 298
 299 /*
 300 ** Return a struct node for the folder to change to.  This is the next
 301 ** (previous, if FPREV mode) folder with desired messages, or the current
 302 ** folder if no folders have desired.  If NEW or UNSEEN mode, print the
 303 ** output but don't change folders.
 304 **
 305 ** n_name is the folder to change to, and n_field is the string list of
 306 ** desired message numbers.
 307 */
 308 static struct node *
 309 doit(char *cur, char *folders, char *sequences[])
 310 {
 311         struct node *first, *cur_node, *node, *last, *prev;
 312         size_t folder_len;
 313         int count, total = 0;
 314         char *command = NULL, *sequences_s = NULL;
 315
 316         if (cur == NULL || cur[0] == '\0') {
 317                 cur = "inbox";
 318         }
 319
 320         check_folders(&first, &last, &cur_node, &folder_len, cur,
 321                         folders, sequences);
 322
 323         if (run_mode == FNEXT || run_mode == FPREV) {
 324                 if (first == NULL) {
 325                         /* No folders at all... */
 326                         return NULL;
 327                 } else if (first->n_next == NULL) {
 328                         /*
 329                         ** We have only one node; any desired messages in it?
 330                         */
 331                         if (first->n_field == NULL) {
 332                                 return NULL;
 333                         } else {
 334                                 return first;
 335                         }
 336                 } else if (cur_node == NULL) {
 337                         /*
 338                         ** Current folder is not listed in .folders,
 339                         ** return first.
 340                         */
 341                         return first;
 342                 }
 343         } else if (run_mode == UNSEEN) {
 344                 sequences_s = join_sequences(sequences);
 345         }
 346
 347         for (node = first, prev = NULL;
 348                  node != NULL;
 349                  prev = node, node = node->n_next) {
 350                 if (run_mode == FNEXT) {
 351                         /*
 352                         ** If we have a previous node and it is the current
 353                         ** folder, return this node.
 354                         */
 355                         if (prev != NULL && strcmp(prev->n_name, cur) == 0) {
 356                                 return node;
 357                         }
 358                 } else if (run_mode == FPREV) {
 359                         if (strcmp(node->n_name, cur) == 0) {
 360                                 /*
 361                                 ** Found current folder in fprev mode;
 362                                 ** if we have a previous node in the list,
 363                                 ** return it; else return the last node.
 364                                 */
 365                                 if (prev == NULL) {
 366                                         return last;
 367                                 }
 368                                 return prev;
 369                         }
 370                 } else if (run_mode == UNSEEN) {
 371                         if (node->n_field == NULL) {
 372                                 continue;
 373                         }
 374
 375                         printf("\n%d %s messages in %s",
 376                                    count_messages(node->n_field),
 377                                    sequences_s,
 378                                    node->n_name);
 379                         if (strcmp(node->n_name, cur) == 0) {
 380                                 puts(" (*: current folder)");
 381                         } else {
 382                                 puts("");
 383                         }
 384                         fflush(stdout);
 385
 386                         /*
 387                         ** TODO: Split enough of scan.c out so that we can
 388                         ** call it here.
 389                         */
 390                         command = concat("scan +", node->n_name, " ",
 391                                         sequences_s, (void *)NULL);
 392                         system(command);
 393                         free(command);
 394                 } else {
 395                         if (node->n_field == NULL) {
 396                                 continue;
 397                         }
 398
 399                         count = count_messages(node->n_field);
 400                         total += count;
 401
 402                         printf("%-*s %6d.%c %s\n",
 403                                    (int) folder_len, node->n_name,
 404                                    count,
 405                                    (strcmp(node->n_name, cur) == 0 ? '*' : ' '),
 406                                    node->n_field);
 407                 }
 408         }
 409
 410         /*
 411         ** If we're fnext, we haven't checked the last node yet.  If it's the
 412         ** current folder, return the first node.
 413         */
 414         if (run_mode == FNEXT && strcmp(last->n_name, cur) == 0) {
 415                 return first;
 416         }
 417
 418         if (run_mode == NEW) {
 419                 printf("%-*s %6d.\n", (int) folder_len, " total", total);
 420         }
 421
 422         return cur_node;
 423 }
 424
 425 int
 426 main(int argc, char **argv)
 427 {
 428         char **ap, *cp, **argp, **arguments;
 429         char help[BUFSIZ];
 430         char *folders = NULL;
 431         char *sequences[NUMATTRS + 1];
 432         int i = 0;
 433         char *unseen;
 434         struct node *folder;
 435
 436 #ifdef LOCALE
 437         setlocale(LC_ALL, "");
 438 #endif
 439         invo_name = r1bindex(argv[0], '/');
 440
 441         /* read user profile/context */
 442         context_read();
 443
 444         arguments = getarguments (invo_name, argc, argv, 1);
 445         argp = arguments;
 446
 447         /*
 448         ** Parse arguments
 449         */
 450         while ((cp = *argp++)) {
 451                 if (*cp == '-') {
 452                         switch (smatch (++cp, switches)) {
 453                         case AMBIGSW:
 454                                 ambigsw (cp, switches);
 455                                 done (1);
 456                         case UNKWNSW:
 457                                 adios (NULL, "-%s unknown", cp);
 458
 459                         case HELPSW:
 460                                 snprintf (help, sizeof(help),
 461                                                 "%s [switches] [sequences]",
 462                                                 invo_name);
 463                                 print_help (help, switches, 1);
 464                                 done (1);
 465                         case VERSIONSW:
 466                                 print_version(invo_name);
 467                                 done (1);
 468
 469                         case FOLDERSSW:
 470                                 if (!(folders = *argp++) || *folders == '-')
 471                                         adios(NULL, "missing argument to %s",
 472                                                         argp[-2]);
 473                                 continue;
 474                         case MODESW:
 475                                 if (!(invo_name = *argp++) || *invo_name == '-')
 476                                         adios(NULL, "missing argument to %s",
 477                                                         argp[-2]);
 478                                 invo_name = r1bindex(invo_name, '/');
 479                                 continue;
 480                         }
 481                 }
 482                 /* have a sequence argument */
 483                 if (!seq_in_list(cp, sequences)) {
 484                         sequences[i++] = cp;
 485                 }
 486         }
 487
 488         if (strcmp(invo_name, "fnext") == 0) {
 489                 run_mode = FNEXT;
 490         } else if (strcmp(invo_name, "fprev") == 0) {
 491                 run_mode = FPREV;
 492         } else if (strcmp(invo_name, "unseen") == 0) {
 493                 run_mode = UNSEEN;
 494         }
 495
 496         if (folders == NULL) {
 497                 /* will flists */
 498         } else {
 499                 if (folders[0] != '/') {
 500                         folders = m_maildir(folders);
 501                 }
 502         }
 503
 504         if (i == 0) {
 505                 /* no sequence arguments; use unseen */
 506                 unseen = context_find(usequence);
 507                 if (unseen == NULL || unseen[0] == '\0') {
 508                         adios(NULL, "must specify sequences or set %s", usequence);
 509                 }
 510                 for (ap = brkstring(unseen, " ", "\n"); *ap; ap++) {
 511                         sequences[i++] = *ap;
 512                 }
 513         }
 514         sequences[i] = NULL;
 515
 516         folder = doit(context_find(pfolder), folders, sequences);
 517         if (folder == NULL) {
 518                 done(0);
 519                 return 1;
 520         }
 521
 522         if (run_mode == UNSEEN) {
 523                 /*
 524                 ** All the scan(1)s it runs change the current folder, so we
 525                 ** need to put it back.  Unfortunately, context_replace lamely
 526                 ** ignores the new value you give it if it is the same one it
 527                 ** has in memory.  So, we'll be lame, too.  I'm not sure if i
 528                 ** should just change context_replace...
 529                 */
 530                 context_replace(pfolder, "defeat_context_replace_optimization");
 531         }
 532
 533         /* update current folder */
 534         context_replace(pfolder, folder->n_name);
 535
 536         if (run_mode == FNEXT || run_mode == FPREV) {
 537                 printf("%s  %s\n", folder->n_name, folder->n_field);
 538         }
 539
 540         context_save();
 541
 542         done (0);
 543         return 1;
 544 }