webcit/bbsview_renderer.c

   1 /*
   2  * $Id$
   3  *
   4  * BBS View renderer module for WebCit
   5  *
   6  * Note: we briefly had a dynamic UI for this.  I thought it was cool, but
   7  * it was not received well by the user community.  If you want to play
   8  * with it, go get r8256 of bbsview_renderer.c and have fun.
   9  *
  10  * Copyright (c) 1996-2010 by the citadel.org team
  11  *
  12  *  This program is free software; you can redistribute it and/or modify
  13  *  it under the terms of the GNU General Public License as published by
  14  *  the Free Software Foundation; either version 3 of the License, or
  15  *  (at your option) any later version.
  16  *
  17  *  This program is distributed in the hope that it will be useful,
  18  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  19  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  20  *  GNU General Public License for more details.
  21  *
  22  *  You should have received a copy of the GNU General Public License
  23  *  along with this program; if not, write to the Free Software
  24  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  25  */
  26
  27 #define RANGE 5
  28
  29 #include "webcit.h"
  30 #include "webserver.h"
  31 #include "groupdav.h"
  32
  33 /*
  34  * Data which gets passed around between the various functions in this module
  35  *
  36  */
  37 struct bbsview {
  38         long *msgs;             /* Array of msgnums for messages we are displaying */
  39         int num_msgs;           /* Number of msgnums stored in 'msgs' */
  40         long lastseen;          /* The number of the last seen message in this room */
  41         int alloc_msgs;         /* Currently allocated size of array */
  42         int requested_page;     /* Which page number did the user request? */
  43 };
  44
  45
  46 /*
  47  * Attempt to determine the closest thing to the "last seen message number" using the
  48  * results of the GTSN command
  49  */
  50 long bbsview_get_last_seen(void)
  51 {
  52         char buf[SIZ] = "0";
  53
  54         serv_puts("GTSN");
  55         serv_getln(buf, sizeof buf);
  56         if (buf[0] == '2') {
  57
  58                 char *comma_pos = strchr(buf, ',');     /* kill first comma and everything to its right */
  59                 if (comma_pos) {
  60                         *comma_pos = 0;
  61                 }
  62
  63                 char *colon_pos = strchr(buf, ':');     /* kill first colon and everything to its left */
  64                 if (colon_pos) {
  65                         strcpy(buf, ++colon_pos);
  66                 }
  67         }
  68
  69         return(atol(buf));
  70 }
  71
  72
  73
  74 /*
  75  * Entry point for message read operations.
  76  */
  77 int bbsview_GetParamsGetServerCall(SharedMessageStatus *Stat,
  78                                    void **ViewSpecific,
  79                                    long oper,
  80                                    char *cmd,
  81                                    long len)
  82 {
  83         struct bbsview *BBS = malloc(sizeof(struct bbsview));
  84         memset(BBS, 0, sizeof(struct bbsview));
  85         *ViewSpecific = BBS;
  86
  87         Stat->startmsg = -1;                                    /* not used here */
  88         Stat->sortit = 1;                                       /* not used here */
  89         Stat->num_displayed = DEFAULT_MAXMSGS;                  /* not used here */
  90         BBS->requested_page = 0;
  91
  92         if (havebstr("page")) {
  93                 BBS->requested_page = ibstr("page");
  94         }
  95
  96         // FIXME do something with bbsview_get_last_seen();
  97
  98         if (havebstr("maxmsgs")) {
  99                 Stat->maxmsgs = ibstr("maxmsgs");
 100         }
 101         if (Stat->maxmsgs == 0) Stat->maxmsgs = DEFAULT_MAXMSGS;
 102
 103         /* perform a "read all" call to fetch the message list -- we'll cut it down later */
 104         rlid[2].cmd(cmd, len);
 105
 106         return 200;
 107 }
 108
 109
 110 /*
 111  * This function is called for every message in the list.
 112  */
 113 int bbsview_LoadMsgFromServer(SharedMessageStatus *Stat,
 114                               void **ViewSpecific,
 115                               message_summary* Msg,
 116                               int is_new,
 117                               int i)
 118 {
 119         struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
 120
 121         if (BBS->alloc_msgs == 0) {
 122                 BBS->alloc_msgs = 1000;
 123                 BBS->msgs = malloc(BBS->alloc_msgs * sizeof(long));
 124                 memset(BBS->msgs, 0, (BBS->alloc_msgs * sizeof(long)) );
 125         }
 126
 127         /* Check our buffer size */
 128         if (BBS->num_msgs >= BBS->alloc_msgs) {
 129                 BBS->alloc_msgs *= 2;
 130                 BBS->msgs = realloc(BBS->msgs, (BBS->alloc_msgs * sizeof(long)));
 131                 memset(&BBS->msgs[BBS->num_msgs], 0, ((BBS->alloc_msgs - BBS->num_msgs) * sizeof(long)) );
 132         }
 133
 134         BBS->msgs[BBS->num_msgs++] = Msg->msgnum;
 135
 136         return 200;
 137 }
 138
 139
 140 int bbsview_sortfunc(const void *s1, const void *s2) {
 141         long l1;
 142         long l2;
 143
 144         l1 = *(long *)(s1);
 145         l2 = *(long *)(s2);
 146
 147         if (l1 > l2) return(+1);
 148         if (l1 < l2) return(-1);
 149         return(0);
 150 }
 151
 152
 153 int bbsview_RenderView_or_Tail(SharedMessageStatus *Stat,
 154                                void **ViewSpecific,
 155                                long oper)
 156 {
 157         struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
 158         int i;
 159         int seq;
 160         const StrBuf *Mime;
 161         int start_index = 0;
 162         int end_index = 0;
 163
 164         if (Stat->nummsgs > 0) {
 165                 lprintf(9, "sorting %d messages\n", BBS->num_msgs);
 166                 qsort(BBS->msgs, (size_t)(BBS->num_msgs), sizeof(long), bbsview_sortfunc);
 167         }
 168
 169         start_index = BBS->requested_page * Stat->maxmsgs;
 170         if (start_index < 0) start_index = 0;
 171         end_index = start_index + Stat->maxmsgs - 1;
 172
 173         for (seq = 0; seq < 3; ++seq) {         /* cheap and sleazy way of rendering the funbar twice */
 174
 175                 if (seq == 1) {
 176                         /* display the selected range of messages */
 177
 178                         if (Stat->nummsgs > 0) {
 179                                 for (i=start_index; (i<=end_index && i<=BBS->num_msgs); ++i) {
 180                                         if (BBS->msgs[i] > 0L) {
 181                                                 read_message(WC->WBuf, HKEY("view_message"), BBS->msgs[i], NULL, &Mime);
 182                                         }
 183                                 }
 184                         }
 185                 }
 186                 else {
 187                         /* Display the range selecto-bar */
 188
 189                         wc_printf("<div class=\"moreprompt\">");
 190                         wc_printf(_("Go to page: "));
 191
 192                         int first = 0;
 193                         int last = ( (Stat->maxmsgs > 0) ? (BBS->num_msgs / Stat->maxmsgs) : 0 );
 194
 195                         for (i=0; i<=last; ++i) {
 196
 197                                 if (
 198                                         (i == first)
 199                                         || (i == last)
 200                                         || (i == BBS->requested_page)
 201                                         || (
 202                                                 ((BBS->requested_page - i) < RANGE)
 203                                                 && ((BBS->requested_page - i) > (0 - RANGE))
 204                                         )
 205                                 ) {
 206
 207                                         if (
 208                                                 (i == last)
 209                                                 && (last - BBS->requested_page > RANGE)
 210                                         ) {
 211                                                 wc_printf("...&nbsp;");
 212                                         }
 213                                         if (i == BBS->requested_page) {
 214                                                 wc_printf("[");
 215                                         }
 216                                         else {
 217                                                 wc_printf("<a href=\"readfwd?page=%d\">", i);
 218                                                 wc_printf("<span class=\"moreprompt_link\">");
 219                                         }
 220                                         if (
 221                                                 (i == first)
 222                                                 && (BBS->requested_page > (RANGE + 1))
 223                                         ) {
 224                                                 wc_printf(_("First"));
 225                                         }
 226                                         else if (
 227                                                 (i == last)
 228                                                 && (last - BBS->requested_page > RANGE)
 229                                         ) {
 230                                                 wc_printf(_("Last"));
 231                                         }
 232                                         else {
 233                                                 wc_printf("%d", i + 1); // change to one-based for display
 234                                         }
 235                                         if (i == BBS->requested_page) {
 236                                                 wc_printf("]");
 237                                         }
 238                                         else {
 239                                                 wc_printf("</span>");
 240                                                 wc_printf("</a>");
 241                                         }
 242                                         if (
 243                                                 (i == first)
 244                                                 && (BBS->requested_page > (RANGE + 1))
 245                                         ) {
 246                                                 wc_printf("&nbsp;...");
 247                                         }
 248                                         if (i != last) {
 249                                                 wc_printf("&nbsp;");
 250                                         }
 251                                 }
 252                         }
 253                         wc_printf("</div>\n");
 254                 }
 255         }
 256
 257         return(0);
 258 }
 259
 260
 261 int bbsview_Cleanup(void **ViewSpecific)
 262 {
 263         struct bbsview *BBS = (struct bbsview *) *ViewSpecific;
 264
 265         if (BBS->alloc_msgs != 0) {
 266                 free(BBS->msgs);
 267         }
 268         free(BBS);
 269
 270         wDumpContent(1);
 271         return 0;
 272 }
 273
 274
 275 void
 276 InitModule_BBSVIEWRENDERERS
 277 (void)
 278 {
 279         RegisterReadLoopHandlerset(
 280                 VIEW_BBS,
 281                 bbsview_GetParamsGetServerCall,
 282                 NULL,
 283                 NULL,
 284                 bbsview_LoadMsgFromServer,
 285                 bbsview_RenderView_or_Tail,
 286                 bbsview_Cleanup
 287         );
 288 }