citadel/euidindex.c

   1 /*
   2  * $Id$
   3  *
   4  * Index messages by EUID per room.
   5  *
   6  */
   7
   8 #include "sysdep.h"
   9 #include <stdlib.h>
  10 #include <unistd.h>
  11 #include <stdio.h>
  12 #include <fcntl.h>
  13
  14 #if TIME_WITH_SYS_TIME
  15 # include <sys/time.h>
  16 # include <time.h>
  17 #else
  18 # if HAVE_SYS_TIME_H
  19 #  include <sys/time.h>
  20 # else
  21 #  include <time.h>
  22 # endif
  23 #endif
  24
  25
  26 #include <ctype.h>
  27 #include <string.h>
  28 #include <limits.h>
  29 #include <errno.h>
  30 #include <stdarg.h>
  31 #include <sys/stat.h>
  32 #include <libcitadel.h>
  33 #include "citadel.h"
  34 #include "server.h"
  35 #include "database.h"
  36 #include "msgbase.h"
  37 #include "support.h"
  38 #include "sysdep_decls.h"
  39 #include "citserver.h"
  40 #include "room_ops.h"
  41 #include "user_ops.h"
  42 #include "file_ops.h"
  43 #include "config.h"
  44 #include "control.h"
  45 #include "euidindex.h"
  46
  47 /*
  48  * The structure of an euidindex record *key* is:
  49  *
  50  * |----room_number----|----------EUID-------------|
  51  *    (sizeof long)       (actual length of euid)
  52  *
  53  *
  54  * The structure of an euidindex record *value* is:
  55  *
  56  * |-----msg_number----|----room_number----|----------EUID-------------|
  57  *    (sizeof long)       (sizeof long)       (actual length of euid)
  58  *
  59  */
  60
  61
  62
  63 /*
  64  * Return nonzero if the supplied room is one which should have
  65  * an EUID index.
  66  */
  67 int DoesThisRoomNeedEuidIndexing(struct ctdlroom *qrbuf) {
  68
  69         switch(qrbuf->QRdefaultview) {
  70                 case VIEW_BBS:          return(0);
  71                 case VIEW_MAILBOX:      return(0);
  72                 case VIEW_ADDRESSBOOK:  return(1);
  73                 case VIEW_CALENDAR:     return(1);
  74                 case VIEW_TASKS:        return(1);
  75                 case VIEW_NOTES:        return(1);
  76                 case VIEW_WIKI:         return(1);
  77         }
  78
  79         return(0);
  80 }
  81
  82
  83
  84
  85
  86
  87 /*
  88  * Locate a message in a given room with a given euid, and return
  89  * its message number.
  90  */
  91 long locate_message_by_euid(char *euid, struct ctdlroom *qrbuf) {
  92         char *key;
  93         int key_len;
  94         struct cdbdata *cdb_euid;
  95         long msgnum = (-1L);
  96
  97         CtdlLogPrintf(CTDL_DEBUG, "Searching for EUID <%s> in <%s>\n", euid, qrbuf->QRname);
  98
  99         key_len = strlen(euid) + sizeof(long) + 1;
 100         key = malloc(key_len);
 101         memcpy(key, &qrbuf->QRnumber, sizeof(long));
 102         strcpy(&key[sizeof(long)], euid);
 103
 104         cdb_euid = cdb_fetch(CDB_EUIDINDEX, key, key_len);
 105         free(key);
 106
 107         if (cdb_euid == NULL) {
 108                 msgnum = (-1L);
 109         }
 110         else {
 111                 /* The first (sizeof long) of the record is what we're
 112                  * looking for.  Throw away the rest.
 113                  */
 114                 memcpy(&msgnum, cdb_euid->ptr, sizeof(long));
 115                 cdb_free(cdb_euid);
 116         }
 117         CtdlLogPrintf(CTDL_DEBUG, "returning msgnum = %ld\n", msgnum);
 118         return(msgnum);
 119 }
 120
 121
 122 /*
 123  * Store the euid index for a message, which has presumably just been
 124  * stored in this room by the caller.
 125  */
 126 void index_message_by_euid(char *euid, struct ctdlroom *qrbuf, long msgnum) {
 127         char *key;
 128         int key_len;
 129         char *data;
 130         int data_len;
 131
 132         CtdlLogPrintf(CTDL_DEBUG, "Indexing message #%ld <%s> in <%s>\n", msgnum, euid, qrbuf->QRname);
 133
 134         key_len = strlen(euid) + sizeof(long) + 1;
 135         key = malloc(key_len);
 136         memcpy(key, &qrbuf->QRnumber, sizeof(long));
 137         strcpy(&key[sizeof(long)], euid);
 138
 139         data_len = sizeof(long) + key_len;
 140         data = malloc(data_len);
 141
 142         memcpy(data, &msgnum, sizeof(long));
 143         memcpy(&data[sizeof(long)], key, key_len);
 144
 145         cdb_store(CDB_EUIDINDEX, key, key_len, data, data_len);
 146         free(key);
 147         free(data);
 148 }
 149
 150
 151
 152 /*
 153  * Called by rebuild_euid_index_for_room() to index one message.
 154  */
 155 void rebuild_euid_index_for_msg(long msgnum, void *userdata) {
 156         struct CtdlMessage *msg = NULL;
 157
 158         msg = CtdlFetchMessage(msgnum, 0);
 159         if (msg == NULL) return;
 160         if (msg->cm_fields['E'] != NULL) {
 161                 index_message_by_euid(msg->cm_fields['E'], &CC->room, msgnum);
 162         }
 163         CtdlFreeMessage(msg);
 164 }
 165
 166
 167 void rebuild_euid_index_for_room(struct ctdlroom *qrbuf, void *data) {
 168         static struct RoomProcList *rplist = NULL;
 169         struct RoomProcList *ptr;
 170         struct ctdlroom qr;
 171
 172         /* Lazy programming here.  Call this function as a ForEachRoom backend
 173          * in order to queue up the room names, or call it with a null room
 174          * to make it do the processing.
 175          */
 176         if (qrbuf != NULL) {
 177                 ptr = (struct RoomProcList *)
 178                         malloc(sizeof (struct RoomProcList));
 179                 if (ptr == NULL) return;
 180
 181                 safestrncpy(ptr->name, qrbuf->QRname, sizeof ptr->name);
 182                 ptr->next = rplist;
 183                 rplist = ptr;
 184                 return;
 185         }
 186
 187         while (rplist != NULL) {
 188                 if (getroom(&qr, rplist->name) == 0) {
 189                         if (DoesThisRoomNeedEuidIndexing(&qr)) {
 190                                 CtdlLogPrintf(CTDL_DEBUG,
 191                                         "Rebuilding EUID index for <%s>\n",
 192                                         rplist->name);
 193                                 usergoto(rplist->name, 0, 0, NULL, NULL);
 194                                 CtdlForEachMessage(MSGS_ALL, 0L, NULL, NULL, NULL,
 195                                         rebuild_euid_index_for_msg, NULL);
 196                         }
 197                 }
 198                 ptr = rplist;
 199                 rplist = rplist->next;
 200                 free(ptr);
 201         }
 202 }
 203
 204
 205 /*
 206  * Globally rebuild the EUID indices in every room.
 207  */
 208 void rebuild_euid_index(void) {
 209         cdb_trunc(CDB_EUIDINDEX);               /* delete the old indices */
 210         ForEachRoom(rebuild_euid_index_for_room, NULL); /* enumerate rm names */
 211         rebuild_euid_index_for_room(NULL, NULL);        /* and index them */
 212 }
 213
 214
 215
 216 /*
 217  * Server command to fetch a message number given an euid.
 218  */
 219 void cmd_euid(char *cmdbuf) {
 220         char euid[256];
 221         long msgnum;
 222         struct cdbdata *cdbfr;
 223         long *msglist = NULL;
 224         int num_msgs = 0;
 225         int i;
 226
 227         if (CtdlAccessCheck(ac_logged_in)) return;
 228
 229         extract_token(euid, cmdbuf, 0, '|', sizeof euid);
 230         msgnum = locate_message_by_euid(euid, &CC->room);
 231         if (msgnum <= 0L) {
 232                 cprintf("%d not found\n", ERROR + MESSAGE_NOT_FOUND);
 233                 return;
 234         }
 235
 236         cdbfr = cdb_fetch(CDB_MSGLISTS, &CC->room.QRnumber, sizeof(long));
 237         if (cdbfr != NULL) {
 238                 num_msgs = cdbfr->len / sizeof(long);
 239                 msglist = (long *) cdbfr->ptr;
 240                 for (i = 0; i < num_msgs; ++i) {
 241                         if (msglist[i] == msgnum) {
 242                                 cdb_free(cdbfr);
 243                                 cprintf("%d %ld\n", CIT_OK, msgnum);
 244                                 return;
 245                         }
 246                 }
 247                 cdb_free(cdbfr);
 248         }
 249
 250         cprintf("%d not found\n", ERROR + MESSAGE_NOT_FOUND);
 251 }
 252
 253