webcit-ng/forum_view.c

   1 /*
   2  * Forum view (threaded/flat)
   3  *
   4  * Copyright (c) 1996-2018 by the citadel.org team
   5  *
   6  * This program is open source software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 3.
   8  *
   9  * This program is distributed in the hope that it will be useful,
  10  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  * GNU General Public License for more details.
  13  */
  14
  15 #include "webcit.h"
  16
  17 struct mthread {
  18         long msgnum;
  19         time_t datetime;
  20         int threadhash;
  21         int refhashes[10];
  22         char from[64];
  23         int parent;
  24 };
  25
  26
  27 // Commands we need to send to Citadel Server before we begin rendering forum view.
  28 // These are common to flat and threaded views.
  29 //
  30 void setup_for_forum_view(struct ctdlsession *c)
  31 {
  32         char buf[1024];
  33         ctdl_printf(c, "MSGP text/html|text/plain");            // Declare the MIME types we know how to render
  34         ctdl_readline(c, buf, sizeof(buf));                     // Ignore the response
  35         ctdl_printf(c, "MSGP dont_decode");                     // Tell the server we will decode base64/etc client-side
  36         ctdl_readline(c, buf, sizeof(buf));                     // Ignore the response
  37 }
  38
  39
  40 #if 0
  41 // Renderer for one message in the threaded view
  42 // (This will probably work for the flat view too.)
  43 //
  44 void forum_render_one_message(struct ctdlsession *c, StrBuf *sj, long msgnum)
  45 {
  46         StrBuf *raw_msg = NULL;
  47         StrBuf *sanitized_msg = NULL;
  48         char buf[1024];
  49         char content_transfer_encoding[1024] = { 0 };
  50         char content_type[1024] = { 0 };
  51         char author[128] = { 0 };
  52         char datetime[128] = { 0 } ;
  53
  54         ctdl_printf(c, "MSG4 %ld", msgnum);
  55         ctdl_readline(c, buf, sizeof(buf));
  56         if (buf[0] != '1') {
  57                 StrBufAppendPrintf(sj, "<div>ERROR CONDITION FIXME WRITE A BOX</div>");
  58                 return;
  59         }
  60
  61         while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000")) ) {
  62                 // citadel header parsing here
  63                 if (!strncasecmp(buf, "from=", 5)) {
  64                         safestrncpy(author, &buf[5], sizeof author);
  65                 }
  66                 if (!strncasecmp(buf, "time=", 5)) {
  67                         time_t tt;
  68                         struct tm tm;
  69                         tt = atol(&buf[5]);
  70                         localtime_r(&tt, &tm);
  71                         strftime(datetime, sizeof datetime, "%c", &tm);
  72                 }
  73         }
  74
  75         if (!strcmp(buf, "text")) {
  76                 while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000")) ) {
  77                         // rfc822 header parsing here
  78                         if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
  79                                 strcpy(content_transfer_encoding, &buf[26]);
  80                                 striplt(content_transfer_encoding);
  81                         }
  82                         if (!strncasecmp(buf, "Content-type:", 13)) {
  83                                 strcpy(content_type, &buf[13]);
  84                                 striplt(content_type);
  85                         }
  86                 }
  87                 raw_msg = ctdl_readtextmsg(c);
  88         }
  89         else {
  90                 raw_msg = NULL;
  91         }
  92
  93         // begin output
  94
  95         StrBufAppendPrintf(sj, "<div>");                                                // begin message wrapper
  96         StrBufAppendPrintf(sj, "<div style=\"float:left;padding-right:2px\">");         // begin avatar FIXME move the style to a stylesheet
  97         StrBufAppendPrintf(sj, "<i class=\"fa fa-user-circle fa-2x\"></i> ");           // FIXME temporary avatar
  98         StrBufAppendPrintf(sj, "</div>");                                               // end avatar
  99         StrBufAppendPrintf(sj, "<div>");                                                // begin content
 100         StrBufAppendPrintf(sj, "<div>");                                                // begin header
 101         StrBufAppendPrintf(sj, "<span class=\"ctdl-username\"><a href=\"#\">%s</a></span> ", author);   // FIXME link to user profile or whatever
 102         StrBufAppendPrintf(sj, "<span class=\"ctdl-msgdate\">%s</span> ", datetime);
 103         StrBufAppendPrintf(sj, "</div>");                                               // end header
 104         StrBufAppendPrintf(sj, "<div>");                                                // begin body
 105
 106         if (raw_msg) {
 107
 108                 // These are the encodings we know how to handle.  Decode in-place.
 109
 110                 if (!strcasecmp(content_transfer_encoding, "base64")) {
 111                         StrBufDecodeBase64(raw_msg);
 112                 }
 113                 if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
 114                         StrBufDecodeQP(raw_msg);
 115                 }
 116
 117                 // At this point, raw_msg contains the decoded message.
 118                 // Now run through the renderers we have available.
 119
 120                 if (!strncasecmp(content_type, "text/html", 9)) {
 121                         sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
 122                 }
 123                 else if (!strncasecmp(content_type, "text/plain", 10)) {
 124                         sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
 125                 }
 126                 else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
 127                         sanitized_msg = variformat2html(raw_msg);
 128                 }
 129                 else {
 130                         sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
 131                 }
 132                 FreeStrBuf(&raw_msg);
 133
 134                 // If sanitized_msg is not NULL, we have rendered the message and can output it.
 135
 136                 if (sanitized_msg) {
 137                         StrBufAppendBuf(sj, sanitized_msg, 0);
 138                         FreeStrBuf(&sanitized_msg);
 139                 }
 140         }
 141
 142         StrBufAppendPrintf(sj, "</div>");                                               // end body
 143         StrBufAppendPrintf(sj, "</div>");                                               // end content
 144         StrBufAppendPrintf(sj, "</div>");                                               // end wrapper
 145 }
 146
 147
 148 // This code implements the thread display code.  The thread sorting algorithm is working nicely but we're trying
 149 // not to do rendering in the C server of webcit.  Maybe move it into the server as "MSGS threaded" or something like that?
 150
 151 // Threaded view (recursive section)
 152 //
 153 void thread_o_print(struct ctdlsession *c, StrBuf *sj, struct mthread *m, int num_msgs, int where_parent_is, int nesting_level)
 154 {
 155         int i = 0;
 156         int j = 0;
 157         int num_printed = 0;
 158
 159         for (i=0; i<num_msgs; ++i) {
 160                 if (m[i].parent == where_parent_is) {
 161
 162                         if (++num_printed == 1) {
 163                                 StrBufAppendPrintf(sj, "<ul style=\"list-style-type: none;\">");
 164                         }
 165
 166                         StrBufAppendPrintf(sj, "<li class=\"post\" id=\"post-%ld\">",  m[i].msgnum);
 167                         forum_render_one_message(c, sj, m[i].msgnum);
 168                         StrBufAppendPrintf(sj, "</li>\r\n");
 169                         if (i != 0) {
 170                                 thread_o_print(c, sj, m, num_msgs, i, nesting_level+1);
 171                         }
 172                 }
 173         }
 174
 175         if (num_printed > 0) {
 176                 StrBufAppendPrintf(sj, "</ul>");
 177         }
 178 }
 179
 180
 181 // Threaded view (entry point)
 182 //
 183 void threaded_view(struct http_transaction *h, struct ctdlsession *c, char *which)
 184 {
 185         int num_msgs = 0;
 186         int num_alloc = 0;
 187         struct mthread *m;
 188         char buf[1024];
 189         char refs[1024];
 190         int i, j, k;
 191
 192         ctdl_printf(c, "MSGS ALL|||9");                 // 9 == headers + thread references
 193         ctdl_readline(c, buf, sizeof(buf));
 194         if (buf[0] != '1') {
 195                 do_404(h);
 196                 return;
 197         }
 198
 199         StrBuf *sj = NewStrBuf();
 200         StrBufAppendPrintf(sj, "<html><body>\r\n");
 201
 202         while (ctdl_readline(c, buf, sizeof buf), strcmp(buf,"000")) {
 203
 204                 ++num_msgs;
 205                 if (num_msgs > num_alloc) {
 206                         if (num_alloc == 0) {
 207                                 num_alloc = 100;
 208                                 m = malloc(num_alloc * sizeof(struct mthread));
 209                         }
 210                         else {
 211                                 num_alloc *= 2;
 212                                 m = realloc(m, (num_alloc * sizeof(struct mthread)));
 213                         }
 214                 }
 215
 216                 memset(&m[num_msgs-1], 0, sizeof(struct mthread));
 217                 m[num_msgs-1].msgnum = extract_long(buf, 0);
 218                 m[num_msgs-1].datetime = extract_long(buf, 1);
 219                 extract_token(m[num_msgs-1].from, buf, 2, '|', sizeof m[num_msgs-1].from);
 220                 m[num_msgs-1].threadhash = extract_int(buf, 6);
 221                 extract_token(refs, buf, 7, '|', sizeof refs);
 222
 223                 char *t;
 224                 char *r = refs;
 225                 i = 0;
 226                 while ((t = strtok_r(r, ",", &r))) {
 227                         if (i == 0) {
 228                                 m[num_msgs-1].refhashes[0] = atoi(t);           // always keep the first one
 229                         }
 230                         else {
 231                                 memcpy(&m[num_msgs-1].refhashes[1], &m[num_msgs-1].refhashes[2], sizeof(int)*8 );       // shift the rest
 232                                 m[num_msgs-1].refhashes[9] = atoi(t);
 233                         }
 234                         ++i;
 235                 }
 236
 237         }
 238
 239         // Sort by thread.  I did read jwz's sorting algorithm and it looks pretty good, but jwz is a self-righteous asshole so we do it our way.
 240         for (i=0; i<num_msgs; ++i) {
 241                 for (j=9; (j>=0)&&(m[i].parent==0); --j) {
 242                         for (k=0; (k<num_msgs)&&(m[i].parent==0); ++k) {
 243                                 if (m[i].refhashes[j] == m[k].threadhash) {
 244                                         m[i].parent = k;
 245                                 }
 246                         }
 247                 }
 248         }
 249
 250         // Now render it
 251         setup_for_forum_view(c);
 252         thread_o_print(c, sj, m, num_msgs, 0, 0);               // Render threads recursively and recursively
 253
 254         // Garbage collection is for people who aren't smart enough to manage their own memory.
 255         if (num_msgs > 0) {
 256                 free(m);
 257         }
 258
 259         StrBufAppendPrintf(sj, "</body></html>\r\n");
 260
 261         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 262         h->response_code = 200;
 263         h->response_string = strdup("OK");
 264         h->response_body_length = StrLength(sj);
 265         h->response_body = SmashStrBuf(&sj);
 266         return;
 267 }
 268
 269
 270 // flat view (entry point)
 271 //
 272 void flat_view(struct http_transaction *h, struct ctdlsession *c, char *which)
 273 {
 274         StrBuf *sj = NewStrBuf();
 275         StrBufAppendPrintf(sj, "<html><body>\r\n");
 276
 277         setup_for_forum_view(c);
 278         long *msglist = get_msglist(c, "ALL");
 279         if (msglist) {
 280                 int i;
 281                 for (i=0; (msglist[i] > 0); ++i) {
 282                         forum_render_one_message(c, sj, msglist[i]);
 283                 }
 284                 free(msglist);
 285         }
 286
 287         StrBufAppendPrintf(sj, "</body></html>\r\n");
 288
 289         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 290         h->response_code = 200;
 291         h->response_string = strdup("OK");
 292         h->response_body_length = StrLength(sj);
 293         h->response_body = SmashStrBuf(&sj);
 294         return;
 295 }
 296
 297
 298 // render one message (entire transaction)      FIXME EXTERMINATE
 299 //
 300 void html_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum)
 301 {
 302         StrBuf *sj = NewStrBuf();
 303         StrBufAppendPrintf(sj, "<html><body>\r\n");
 304         setup_for_forum_view(c);                // FIXME way too inefficient to do this for every message !!!!!!!!!!!!!
 305         forum_render_one_message(c, sj, msgnum);
 306         StrBufAppendPrintf(sj, "</body></html>\r\n");
 307         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 308         h->response_code = 200;
 309         h->response_string = strdup("OK");
 310         h->response_body_length = StrLength(sj);
 311         h->response_body = SmashStrBuf(&sj);
 312         return;
 313 }
 314
 315 #endif
 316
 317 // Fetch a single message and return it in JSON format for client-side rendering
 318 //
 319 void json_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum)
 320 {
 321         StrBuf *raw_msg = NULL;
 322         StrBuf *sanitized_msg = NULL;
 323         char buf[1024];
 324         char content_transfer_encoding[1024] = { 0 };
 325         char content_type[1024] = { 0 };
 326         char author[128] = { 0 };
 327         char datetime[128] = { 0 } ;
 328
 329         setup_for_forum_view(c);
 330
 331         ctdl_printf(c, "MSG4 %ld", msgnum);
 332         ctdl_readline(c, buf, sizeof(buf));
 333         if (buf[0] != '1') {
 334                 do_404(h);
 335                 return;
 336         }
 337
 338         JsonValue *j = NewJsonObject(HKEY("message"));
 339
 340         while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000")) ) {
 341                 // citadel header parsing here
 342                 if (!strncasecmp(buf, "from=", 5)) {
 343                         JsonObjectAppend(j, NewJsonPlainString( HKEY("from"), &buf[5], -1));
 344                 }
 345                 if (!strncasecmp(buf, "rfca=", 5)) {
 346                         JsonObjectAppend(j, NewJsonPlainString( HKEY("from"), &buf[5], -1));
 347                 }
 348                 if (!strncasecmp(buf, "time=", 5)) {
 349                         time_t tt;
 350                         struct tm tm;
 351                         tt = atol(&buf[5]);
 352                         localtime_r(&tt, &tm);
 353                         strftime(datetime, sizeof datetime, "%c", &tm);
 354                         JsonObjectAppend(j, NewJsonPlainString( HKEY("time"), datetime, -1));
 355                 }
 356         }
 357
 358         if (!strcmp(buf, "text")) {
 359                 while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000")) ) {
 360                         // rfc822 header parsing here
 361                         if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
 362                                 strcpy(content_transfer_encoding, &buf[26]);
 363                                 striplt(content_transfer_encoding);
 364                         }
 365                         if (!strncasecmp(buf, "Content-type:", 13)) {
 366                                 strcpy(content_type, &buf[13]);
 367                                 striplt(content_type);
 368                         }
 369                 }
 370                 raw_msg = ctdl_readtextmsg(c);
 371         }
 372         else {
 373                 raw_msg = NULL;
 374         }
 375
 376         if (raw_msg) {
 377
 378                 // These are the encodings we know how to handle.  Decode in-place.
 379
 380                 if (!strcasecmp(content_transfer_encoding, "base64")) {
 381                         StrBufDecodeBase64(raw_msg);
 382                 }
 383                 if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
 384                         StrBufDecodeQP(raw_msg);
 385                 }
 386
 387                 // At this point, raw_msg contains the decoded message.
 388                 // Now run through the renderers we have available.
 389
 390                 if (!strncasecmp(content_type, "text/html", 9)) {
 391                         sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
 392                 }
 393                 else if (!strncasecmp(content_type, "text/plain", 10)) {
 394                         sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
 395                 }
 396                 else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
 397                         sanitized_msg = variformat2html(raw_msg);
 398                 }
 399                 else {
 400                         sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
 401                 }
 402                 FreeStrBuf(&raw_msg);
 403
 404                 // If sanitized_msg is not NULL, we have rendered the message and can output it.
 405
 406                 if (sanitized_msg) {
 407                         JsonObjectAppend(j, NewJsonString(HKEY("text"), sanitized_msg, NEWJSONSTRING_SMASHBUF));
 408                 }
 409         }
 410
 411         StrBuf *sj = NewStrBuf();
 412         SerializeJson(sj, j, 1);                        // '1' == free the source object
 413
 414         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 415         h->response_code = 200;
 416         h->response_string = strdup("OK");
 417         h->response_body_length = StrLength(sj);
 418         h->response_body = SmashStrBuf(&sj);
 419 }