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 <h/mh.h>
  14 #include <h/crawl_folders.h>
  15 #include <h/utils.h>
  16 #include <sys/types.h>
  17 #include <stdio.h>
  18 #include <stdlib.h>
  19 #include <string.h>
  20 #include <unistd.h>
  21 #include <locale.h>
  22 #include <sysexits.h>
  23
  24 static struct swit switches[] = {
  25 #define MODESW 0
  26         { "mode", 0 },
  27 #define FOLDERSSW 1
  28         { "folders", 0 },
  29 #define VERSIONSW 2
  30         { "Version", 0 },
  31 #define HELPSW 3
  32         { "help", 0 },
  33         { NULL, 0 }
  34 };
  35
  36 static enum { NEW, FNEXT, FPREV, UNSEEN } run_mode = NEW;
  37
  38 /*
  39 ** check_folders uses this to maintain state with both .folders list of
  40 ** folders and with crawl_folders.
  41 */
  42 struct list_state {
  43         struct node **first, **cur_node;
  44         size_t *maxlen;
  45         char *cur;
  46         char **sequences;
  47         struct node *node;
  48 };
  49
  50 /* Return the number of messages in a string list of message numbers. */
  51 static int
  52 count_messages(char *field)
  53 {
  54         int total = 0;
  55         int j, k;
  56         char *cp, **ap;
  57
  58         field = getcpy(field);
  59
  60         /* copied from seq_read.c:seq_init */
  61         for (ap = brkstring(field, " ", "\n"); *ap; ap++) {
  62                 if ((cp = strchr(*ap, '-')))
  63                         *cp++ = '\0';
  64                 if ((j = m_atoi(*ap)) > 0) {
  65                         k = cp ? m_atoi(cp) : j;
  66
  67                         total += k - j + 1;
  68                 }
  69         }
  70
  71         free(field);
  72
  73         return total;
  74 }
  75
  76 /* Return TRUE if the sequence 'name' is in 'sequences'. */
  77 static boolean
  78 seq_in_list(char *name, char *sequences[])
  79 {
  80         int i;
  81
  82         for (i = 0; sequences[i] != NULL; i++) {
  83                 if (strcmp(name, sequences[i]) == 0) {
  84                         return TRUE;
  85                 }
  86         }
  87
  88         return FALSE;
  89 }
  90
  91 /*
  92 ** Return the string list of message numbers from the sequences file,
  93 ** or NULL if none.
  94 */
  95 static char *
  96 get_msgnums(char *folder, char *sequences[])
  97 {
  98         char *seqfile = concat(toabsdir(folder), "/", mh_seq, (void *)NULL);
  99         FILE *fp = fopen(seqfile, "r");
 100         int state;
 101         char name[NAMESZ], field[BUFSIZ];
 102         char *cp;
 103         char *msgnums = NULL, *this_msgnums, *old_msgnums;
 104
 105         /* no sequences file -> no messages */
 106         if (fp == NULL) {
 107                 return NULL;
 108         }
 109
 110         /* copied from seq_read.c:seq_public */
 111         for (state = FLD;;) {
 112                 switch (state = m_getfld(state, name, field, sizeof(field),
 113                                 fp)) {
 114                 case FLD:
 115                 case FLDPLUS:
 116                 case FLDEOF:
 117                         if (state == FLDPLUS) {
 118                                 cp = getcpy(field);
 119                                 while (state == FLDPLUS) {
 120                                         state = m_getfld(state, name, field,
 121                                                         sizeof(field), 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(EX_DATAERR, NULL, "no blank lines are permitted in %s",
 165                                         seqfile);
 166                         /* fall */
 167
 168                 case FILEEOF:
 169                         break;
 170
 171                 default:
 172                         adios(EX_SOFTWARE, NULL, "%s is poorly formatted", seqfile);
 173                 }
 174                 break;  /* break from for loop */
 175         }
 176
 177         fclose(fp);
 178
 179         return msgnums;
 180 }
 181
 182 /*
 183 ** Check `folder' (of length `len') for interesting messages,
 184 ** filling in the list in `b'.
 185 */
 186 static void
 187 check_folder(char *folder, size_t len, struct list_state *b)
 188 {
 189         char *msgnums = get_msgnums(folder, b->sequences);
 190         int is_cur = strcmp(folder, b->cur) == 0;
 191
 192         if (is_cur || msgnums != NULL) {
 193                 if (*b->first == NULL) {
 194                         *b->first = b->node = mh_xmalloc(sizeof(*b->node));
 195                 } else {
 196                         b->node->n_next = mh_xmalloc(sizeof(*b->node));
 197                         b->node = b->node->n_next;
 198                 }
 199                 b->node->n_name = folder;
 200                 b->node->n_field = msgnums;
 201
 202                 if (*b->maxlen < len) {
 203                         *b->maxlen = len;
 204                 }
 205         }
 206
 207         /* Save the node for the current folder, so we can fall back to it. */
 208         if (is_cur) {
 209                 *b->cur_node = b->node;
 210         }
 211 }
 212
 213 static boolean
 214 crawl_callback(char *folder, void *baton)
 215 {
 216         check_folder(folder, strlen(folder), baton);
 217         return TRUE;
 218 }
 219
 220 /*
 221 ** Scan folders, returning:
 222 ** first        -- list of nodes for all folders which have desired messages;
 223 **                 if the current folder is listed in .folders, it is also in
 224 **                 the list regardless of whether it has any desired messages
 225 ** last         -- last node in list
 226 ** cur_node     -- node of current folder, if listed in .folders
 227 ** maxlen       -- length of longest folder name
 228 **
 229 ** `cur' points to the name of the current folder, `folders' points to the
 230 ** name of a .folder (if NULL, crawl all folders), and `sequences' points to
 231 ** the array of sequences for which to look.
 232 **
 233 ** An empty list is returned as first=last=NULL.
 234 */
 235 static void
 236 check_folders(struct node **first, struct node **last,
 237         struct node **cur_node, size_t *maxlen,
 238         char *cur, char *folders, char *sequences[])
 239 {
 240         struct list_state b;
 241         FILE *fp;
 242         char *line;
 243         size_t len;
 244
 245         *first = *last = *cur_node = NULL;
 246         *maxlen = 0;
 247
 248         b.first = first;
 249         b.cur_node = cur_node;
 250         b.maxlen = maxlen;
 251         b.cur = cur;
 252         b.sequences = sequences;
 253
 254         if (folders == NULL) {
 255                 chdir(toabsdir("+"));
 256                 crawl_folders(".", crawl_callback, &b);
 257         } else {
 258                 fp = fopen(folders, "r");
 259                 if (fp  == NULL) {
 260                         adios(EX_IOERR, NULL, "failed to read %s", folders);
 261                 }
 262                 while (vfgets(fp, &line) == OK) {
 263                         len = strlen(line) - 1;
 264                         line[len] = '\0';
 265                         check_folder(getcpy(line), len, &b);
 266                 }
 267                 fclose(fp);
 268         }
 269
 270         if (*first != NULL) {
 271                 b.node->n_next = NULL;
 272                 *last = b.node;
 273         }
 274 }
 275
 276 /* Return a single string of the `sequences' joined by a space (' '). */
 277 static char *
 278 join_sequences(char *sequences[])
 279 {
 280         int i;
 281         size_t len = 0;
 282         char *result, *cp;
 283
 284         for (i = 0; sequences[i] != NULL; i++) {
 285                 len += strlen(sequences[i]) + 1;
 286         }
 287         result = mh_xmalloc(len + 1);
 288
 289         for (i = 0, cp = result; sequences[i] != NULL; i++, cp += len + 1) {
 290                 len = strlen(sequences[i]);
 291                 memcpy(cp, sequences[i], len);
 292                 cp[len] = ' ';
 293         }
 294         /* -1 to overwrite the last delimiter */
 295         *--cp = '\0';
 296
 297         return result;
 298 }
 299
 300 /*
 301 ** Return a struct node for the folder to change to.  This is the next
 302 ** (previous, if FPREV mode) folder with desired messages, or the current
 303 ** folder if no folders have desired.  If NEW or UNSEEN mode, print the
 304 ** output but don't change folders.
 305 **
 306 ** n_name is the folder to change to, and n_field is the string list of
 307 ** desired message numbers.
 308 */
 309 static struct node *
 310 doit(char *cur, char *folders, char *sequences[])
 311 {
 312         struct node *first, *cur_node, *node, *last = NULL, *prev;
 313         size_t folder_len;
 314         int count, total = 0;
 315         char *sequences_s = NULL;
 316         int argc = 0;
 317         char *argv[MAXARGS];
 318         char **seqp;
 319         char buf[BUFSIZ];
 320
 321         if (cur == NULL || cur[0] == '\0') {
 322                 cur = "inbox";
 323         }
 324
 325         check_folders(&first, &last, &cur_node, &folder_len, cur,
 326                         folders, sequences);
 327
 328         if (run_mode == FNEXT || run_mode == FPREV) {
 329                 if (first == NULL) {
 330                         /* No folders at all... */
 331                         return NULL;
 332                 } else if (first->n_next == NULL) {
 333                         /*
 334                         ** We have only one node; any desired messages in it?
 335                         */
 336                         if (first->n_field == NULL) {
 337                                 return NULL;
 338                         } else {
 339                                 return first;
 340                         }
 341                 } else if (cur_node == NULL) {
 342                         /*
 343                         ** Current folder is not listed in .folders,
 344                         ** return first.
 345                         */
 346                         return first;
 347                 }
 348         } else if (run_mode == UNSEEN) {
 349                 sequences_s = join_sequences(sequences);
 350         }
 351
 352         for (node = first, prev = NULL;
 353                  node != NULL;
 354                  prev = node, node = node->n_next) {
 355                 if (run_mode == FNEXT) {
 356                         /*
 357                         ** If we have a previous node and it is the current
 358                         ** folder, return this node.
 359                         */
 360                         if (prev != NULL && strcmp(prev->n_name, cur) == 0) {
 361                                 return node;
 362                         }
 363                 } else if (run_mode == FPREV) {
 364                         if (strcmp(node->n_name, cur) == 0) {
 365                                 /*
 366                                 ** Found current folder in fprev mode;
 367                                 ** if we have a previous node in the list,
 368                                 ** return it; else return the last node.
 369                                 */
 370                                 if (prev == NULL) {
 371                                         return last;
 372                                 }
 373                                 return prev;
 374                         }
 375                 } else if (run_mode == UNSEEN) {
 376                         if (node->n_field == NULL) {
 377                                 continue;
 378                         }
 379
 380                         printf("\n%d %s messages in %s",
 381                                    count_messages(node->n_field),
 382                                    sequences_s,
 383                                    node->n_name);
 384                         if (strcmp(node->n_name, cur) == 0) {
 385                                 puts(" (*: current folder)");
 386                         } else {
 387                                 puts("");
 388                         }
 389                         fflush(stdout);
 390
 391                         argc = 0;
 392                         argv[argc++] = "scan";
 393                         snprintf(buf, sizeof buf, "+%s", node->n_name);
 394                         argv[argc++] = buf;
 395                         for (seqp=sequences; *seqp; seqp++) {
 396                                 argv[argc++] = *seqp;
 397                         }
 398                         argv[argc] = (char *)NULL;
 399                         execprog(*argv, argv);
 400                 } else {
 401                         if (node->n_field == NULL) {
 402                                 continue;
 403                         }
 404
 405                         count = count_messages(node->n_field);
 406                         total += count;
 407
 408                         printf("%-*s %6d.%c %s\n", (int) folder_len,
 409                                 node->n_name, count,
 410                                 (strcmp(node->n_name, cur) == 0 ? '*' : ' '),
 411                                 node->n_field);
 412                 }
 413         }
 414
 415         /*
 416         ** If we're fnext, we haven't checked the last node yet.  If it's the
 417         ** current folder, return the first node.
 418         */
 419         if (run_mode == FNEXT && strcmp(last->n_name, cur) == 0) {
 420                 return first;
 421         }
 422
 423         if (run_mode == NEW) {
 424                 printf("%-*s %6d.\n", (int) folder_len, " total", total);
 425         }
 426
 427         return cur_node;
 428 }
 429
 430 int
 431 main(int argc, char **argv)
 432 {
 433         char **ap, *cp, **argp, **arguments;
 434         char help[BUFSIZ];
 435         char *folders = NULL;
 436         char *sequences[NUMATTRS + 1];
 437         int i = 0;
 438         char *unseen;
 439         struct node *folder;
 440
 441         sequences[0] = NULL;
 442         sequences[1] = NULL;
 443
 444         setlocale(LC_ALL, "");
 445         invo_name = mhbasename(argv[0]);
 446
 447         /* read user profile/context */
 448         context_read();
 449
 450         arguments = getarguments(invo_name, argc, argv, 1);
 451         argp = arguments;
 452
 453         /*
 454         ** Parse arguments
 455         */
 456         while ((cp = *argp++)) {
 457                 if (*cp == '-') {
 458                         switch (smatch(++cp, switches)) {
 459                         case AMBIGSW:
 460                                 ambigsw(cp, switches);
 461                                 exit(EX_USAGE);
 462                         case UNKWNSW:
 463                                 adios(EX_USAGE, NULL, "-%s unknown", cp);
 464
 465                         case HELPSW:
 466                                 snprintf(help, sizeof(help),
 467                                                 "%s [switches] [sequences]",
 468                                                 invo_name);
 469                                 print_help(help, switches, 1);
 470                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 471                         case VERSIONSW:
 472                                 print_version(invo_name);
 473                                 exit(argc == 2 ? EX_OK : EX_USAGE);
 474
 475                         case FOLDERSSW:
 476                                 if (!(folders = *argp++) || *folders == '-')
 477                                         adios(EX_USAGE, NULL, "missing argument to %s",
 478                                                         argp[-2]);
 479                                 continue;
 480                         case MODESW:
 481                                 if (!(invo_name = *argp++) || *invo_name == '-')
 482                                         adios(EX_USAGE, NULL, "missing argument to %s",
 483                                                         argp[-2]);
 484                                 invo_name = mhbasename(invo_name);
 485                                 continue;
 486                         }
 487                 }
 488                 /* have a sequence argument */
 489                 if (!seq_in_list(cp, sequences)) {
 490                         sequences[i++] = cp;
 491                         sequences[i] = NULL;
 492                 }
 493         }
 494
 495         if (strcmp(invo_name, "fnext") == 0) {
 496                 run_mode = FNEXT;
 497         } else if (strcmp(invo_name, "fprev") == 0) {
 498                 run_mode = FPREV;
 499         } else if (strcmp(invo_name, "unseen") == 0) {
 500                 run_mode = UNSEEN;
 501         }
 502
 503         if (folders == NULL) {
 504                 /* will flists */
 505         } else {
 506                 if (folders[0] != '/') {
 507                         folders = toabsdir(folders);
 508                 }
 509         }
 510
 511         if (i == 0) {
 512                 char *dp;
 513                 /* no sequence arguments; use unseen */
 514                 if ((unseen = context_find(usequence))) {
 515                         if (!*unseen) {
 516                                 adios(EX_CONFIG, NULL, "profile entry %s set, but empty, and no sequences given", usequence);
 517                         }
 518                 } else {
 519                         unseen = seq_unseen;  /* use default */
 520                 }
 521                 dp = getcpy(unseen);
 522                 for (ap = brkstring(dp, " ", "\n"); *ap; ap++) {
 523                         sequences[i++] = *ap;
 524                 }
 525         }
 526         sequences[i] = NULL;
 527
 528         folder = doit(context_find(curfolder), folders, sequences);
 529         if (folder == NULL) {
 530                 exit(EX_OK);
 531                 return 1;
 532         }
 533
 534         if (run_mode == UNSEEN) {
 535                 /*
 536                 ** All the scan(1)s it runs change the current folder, so we
 537                 ** need to put it back.  Unfortunately, context_replace lamely
 538                 ** ignores the new value you give it if it is the same one it
 539                 ** has in memory.  So, we'll be lame, too.  I'm not sure if i
 540                 ** should just change context_replace...
 541                 */
 542                 context_replace(curfolder, "defeat_context_replace_optimization");
 543         }
 544
 545         /* update current folder */
 546         context_replace(curfolder, folder->n_name);
 547
 548         if (run_mode == FNEXT || run_mode == FPREV) {
 549                 printf("%s  %s\n", folder->n_name, folder->n_field);
 550         }
 551
 552         context_save();
 553
 554         return 0;
 555 }