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 // Renderer for one message in the threaded view
  28 // (This will probably work for the flat view too.)
  29 //
  30 void forum_render_one_message(struct ctdlsession *c, StrBuf *sj, long msgnum)
  31 {
  32         StrBuf *raw_msg = NULL;
  33         StrBuf *sanitized_msg = NULL;
  34         char buf[1024];
  35         char content_transfer_encoding[1024] = { 0 };
  36         char content_type[1024] = { 0 };
  37         char author[128] = { 0 };
  38         char datetime[128] = { 0 } ;
  39
  40         ctdl_printf(c, "MSG4 %ld", msgnum);
  41         ctdl_readline(c, buf, sizeof(buf));
  42         if (buf[0] != '1') {
  43                 StrBufAppendPrintf(sj, "<div>ERROR CONDITION FIXME WRITE A BOX</div>");
  44                 return;
  45         }
  46
  47         while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000")) ) {
  48                 // citadel header parsing here
  49                 if (!strncasecmp(buf, "from=", 5)) {
  50                         safestrncpy(author, &buf[5], sizeof author);
  51                 }
  52                 if (!strncasecmp(buf, "time=", 5)) {
  53                         time_t tt;
  54                         struct tm tm;
  55                         tt = atol(&buf[5]);
  56                         localtime_r(&tt, &tm);
  57                         strftime(datetime, sizeof datetime, "%c", &tm);
  58                 }
  59         }
  60
  61         if (!strcmp(buf, "text")) {
  62                 while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000")) ) {
  63                         // rfc822 header parsing here
  64                         if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
  65                                 strcpy(content_transfer_encoding, &buf[26]);
  66                                 striplt(content_transfer_encoding);
  67                         }
  68                         if (!strncasecmp(buf, "Content-type:", 13)) {
  69                                 strcpy(content_type, &buf[13]);
  70                                 striplt(content_type);
  71                         }
  72                 }
  73                 raw_msg = ctdl_readtextmsg(c);
  74         }
  75         else {
  76                 raw_msg = NULL;
  77         }
  78
  79         // begin output
  80
  81         StrBufAppendPrintf(sj, "<div>");                                                // begin message wrapper
  82         StrBufAppendPrintf(sj, "<div style=\"float:left;padding-right:2px\">");         // begin avatar FIXME move the style to a stylesheet
  83         StrBufAppendPrintf(sj, "<i class=\"fa fa-user-circle fa-2x\"></i> ");           // FIXME temporary avatar
  84         StrBufAppendPrintf(sj, "</div>");                                               // end avatar
  85         StrBufAppendPrintf(sj, "<div>");                                                // begin content
  86         StrBufAppendPrintf(sj, "<div>");                                                // begin header
  87         StrBufAppendPrintf(sj, "<span class=\"ctdl-username\"><a href=\"#\">%s</a></span> ", author);   // FIXME link to user profile or whatever
  88         StrBufAppendPrintf(sj, "<span class=\"ctdl-msgdate\">%s</span> ", datetime);
  89         StrBufAppendPrintf(sj, "</div>");                                               // end header
  90         StrBufAppendPrintf(sj, "<div>");                                                // begin body
  91
  92         if (raw_msg) {
  93
  94                 // These are the encodings we know how to handle.  Decode in-place.
  95
  96                 if (!strcasecmp(content_transfer_encoding, "base64")) {
  97                         StrBufDecodeBase64(raw_msg);
  98                 }
  99                 if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
 100                         StrBufDecodeQP(raw_msg);
 101                 }
 102
 103                 // At this point, raw_msg contains the decoded message.
 104                 // Now run through the renderers we have available.
 105
 106                 if (!strncasecmp(content_type, "text/html", 9)) {
 107                         sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
 108                 }
 109                 else if (!strncasecmp(content_type, "text/plain", 10)) {
 110                         sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
 111                 }
 112                 else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
 113                         sanitized_msg = variformat2html(raw_msg);
 114                 }
 115                 else {
 116                         sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
 117                 }
 118                 FreeStrBuf(&raw_msg);
 119
 120                 // If sanitized_msg is not NULL, we have rendered the message and can output it.
 121
 122                 if (sanitized_msg) {
 123                         StrBufAppendBuf(sj, sanitized_msg, 0);
 124                         FreeStrBuf(&sanitized_msg);
 125                 }
 126         }
 127
 128         StrBufAppendPrintf(sj, "</div>");                                               // end body
 129         StrBufAppendPrintf(sj, "</div>");                                               // end content
 130         StrBufAppendPrintf(sj, "</div>");                                               // end wrapper
 131 }
 132
 133
 134 // Commands we need to send to Citadel Server before we begin rendering forum view.
 135 // These are common to flat and threaded views.
 136 //
 137 void setup_for_forum_view(struct ctdlsession *c)
 138 {
 139         char buf[1024];
 140         ctdl_printf(c, "MSGP text/html|text/plain");            // Declare the MIME types we know how to render
 141         ctdl_readline(c, buf, sizeof(buf));                     // Ignore the response
 142         ctdl_printf(c, "MSGP dont_decode");                     // Tell the server we will decode base64/etc client-side
 143         ctdl_readline(c, buf, sizeof(buf));                     // Ignore the response
 144 }
 145
 146
 147 #if 0
 148
 149 // This code implements the thread display code.  The thread sorting algorithm is working nicely but we're trying
 150 // not to do rendering in the C server of webcit.  Maybe move it into the server as "MSGS threaded" or something like that?
 151
 152 // Threaded view (recursive section)
 153 //
 154 void thread_o_print(struct ctdlsession *c, StrBuf *sj, struct mthread *m, int num_msgs, int where_parent_is, int nesting_level)
 155 {
 156         int i = 0;
 157         int j = 0;
 158         int num_printed = 0;
 159
 160         for (i=0; i<num_msgs; ++i) {
 161                 if (m[i].parent == where_parent_is) {
 162
 163                         if (++num_printed == 1) {
 164                                 StrBufAppendPrintf(sj, "<ul style=\"list-style-type: none;\">");
 165                         }
 166
 167                         StrBufAppendPrintf(sj, "<li class=\"post\" id=\"post-%ld\">",  m[i].msgnum);
 168                         forum_render_one_message(c, sj, m[i].msgnum);
 169                         StrBufAppendPrintf(sj, "</li>\r\n");
 170                         if (i != 0) {
 171                                 thread_o_print(c, sj, m, num_msgs, i, nesting_level+1);
 172                         }
 173                 }
 174         }
 175
 176         if (num_printed > 0) {
 177                 StrBufAppendPrintf(sj, "</ul>");
 178         }
 179 }
 180
 181
 182 // Threaded view (entry point)
 183 //
 184 void threaded_view(struct http_transaction *h, struct ctdlsession *c, char *which)
 185 {
 186         int num_msgs = 0;
 187         int num_alloc = 0;
 188         struct mthread *m;
 189         char buf[1024];
 190         char refs[1024];
 191         int i, j, k;
 192
 193         ctdl_printf(c, "MSGS ALL|||9");                 // 9 == headers + thread references
 194         ctdl_readline(c, buf, sizeof(buf));
 195         if (buf[0] != '1') {
 196                 do_404(h);
 197                 return;
 198         }
 199
 200         StrBuf *sj = NewStrBuf();
 201         StrBufAppendPrintf(sj, "<html><body>\r\n");
 202
 203         while (ctdl_readline(c, buf, sizeof buf), strcmp(buf,"000")) {
 204
 205                 ++num_msgs;
 206                 if (num_msgs > num_alloc) {
 207                         if (num_alloc == 0) {
 208                                 num_alloc = 100;
 209                                 m = malloc(num_alloc * sizeof(struct mthread));
 210                         }
 211                         else {
 212                                 num_alloc *= 2;
 213                                 m = realloc(m, (num_alloc * sizeof(struct mthread)));
 214                         }
 215                 }
 216
 217                 memset(&m[num_msgs-1], 0, sizeof(struct mthread));
 218                 m[num_msgs-1].msgnum = extract_long(buf, 0);
 219                 m[num_msgs-1].datetime = extract_long(buf, 1);
 220                 extract_token(m[num_msgs-1].from, buf, 2, '|', sizeof m[num_msgs-1].from);
 221                 m[num_msgs-1].threadhash = extract_int(buf, 6);
 222                 extract_token(refs, buf, 7, '|', sizeof refs);
 223
 224                 char *t;
 225                 char *r = refs;
 226                 i = 0;
 227                 while ((t = strtok_r(r, ",", &r))) {
 228                         if (i == 0) {
 229                                 m[num_msgs-1].refhashes[0] = atoi(t);           // always keep the first one
 230                         }
 231                         else {
 232                                 memcpy(&m[num_msgs-1].refhashes[1], &m[num_msgs-1].refhashes[2], sizeof(int)*8 );       // shift the rest
 233                                 m[num_msgs-1].refhashes[9] = atoi(t);
 234                         }
 235                         ++i;
 236                 }
 237
 238         }
 239
 240         // 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.
 241         for (i=0; i<num_msgs; ++i) {
 242                 for (j=9; (j>=0)&&(m[i].parent==0); --j) {
 243                         for (k=0; (k<num_msgs)&&(m[i].parent==0); ++k) {
 244                                 if (m[i].refhashes[j] == m[k].threadhash) {
 245                                         m[i].parent = k;
 246                                 }
 247                         }
 248                 }
 249         }
 250
 251         // Now render it
 252         setup_for_forum_view(c);
 253         thread_o_print(c, sj, m, num_msgs, 0, 0);               // Render threads recursively and recursively
 254
 255         // Garbage collection is for people who aren't smart enough to manage their own memory.
 256         if (num_msgs > 0) {
 257                 free(m);
 258         }
 259
 260         StrBufAppendPrintf(sj, "</body></html>\r\n");
 261
 262         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 263         h->response_code = 200;
 264         h->response_string = strdup("OK");
 265         h->response_body_length = StrLength(sj);
 266         h->response_body = SmashStrBuf(&sj);
 267         return;
 268 }
 269
 270
 271 // flat view (entry point)
 272 //
 273 void flat_view(struct http_transaction *h, struct ctdlsession *c, char *which)
 274 {
 275         StrBuf *sj = NewStrBuf();
 276         StrBufAppendPrintf(sj, "<html><body>\r\n");
 277
 278         setup_for_forum_view(c);
 279         long *msglist = get_msglist(c, "ALL");
 280         if (msglist) {
 281                 int i;
 282                 for (i=0; (msglist[i] > 0); ++i) {
 283                         forum_render_one_message(c, sj, msglist[i]);
 284                 }
 285                 free(msglist);
 286         }
 287
 288         StrBufAppendPrintf(sj, "</body></html>\r\n");
 289
 290         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 291         h->response_code = 200;
 292         h->response_string = strdup("OK");
 293         h->response_body_length = StrLength(sj);
 294         h->response_body = SmashStrBuf(&sj);
 295         return;
 296 }
 297
 298
 299 // render one message (entire transaction)      FIXME EXTERMINATE
 300 //
 301 void html_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum)
 302 {
 303         StrBuf *sj = NewStrBuf();
 304         StrBufAppendPrintf(sj, "<html><body>\r\n");
 305         setup_for_forum_view(c);                // FIXME way too inefficient to do this for every message !!!!!!!!!!!!!
 306         forum_render_one_message(c, sj, msgnum);
 307         StrBufAppendPrintf(sj, "</body></html>\r\n");
 308         add_response_header(h, strdup("Content-type"), strdup("text/html; charset=utf-8"));
 309         h->response_code = 200;
 310         h->response_string = strdup("OK");
 311         h->response_body_length = StrLength(sj);
 312         h->response_body = SmashStrBuf(&sj);
 313         return;
 314 }
 315
 316 #endif
 317
 318 // Fetch a single message and return it in JSON format for client-side rendering
 319 //
 320 void json_render_one_message(struct http_transaction *h, struct ctdlsession *c, long msgnum)
 321 {
 322         StrBuf *raw_msg = NULL;
 323         StrBuf *sanitized_msg = NULL;
 324         char buf[1024];
 325         char content_transfer_encoding[1024] = { 0 };
 326         char content_type[1024] = { 0 };
 327         char author[128] = { 0 };
 328         char datetime[128] = { 0 } ;
 329
 330         setup_for_forum_view(c);
 331
 332         ctdl_printf(c, "MSG4 %ld", msgnum);
 333         ctdl_readline(c, buf, sizeof(buf));
 334         if (buf[0] != '1') {
 335                 do_404(h);
 336                 return;
 337         }
 338
 339         JsonValue *j = NewJsonObject(HKEY("message"));
 340
 341         while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "text")) && (strcmp(buf, "000")) ) {
 342                 // citadel header parsing here
 343                 if (!strncasecmp(buf, "from=", 5)) {
 344                         JsonObjectAppend(j, NewJsonPlainString( HKEY("from"), &buf[5], -1));
 345                 }
 346                 if (!strncasecmp(buf, "rfca=", 5)) {
 347                         JsonObjectAppend(j, NewJsonPlainString( HKEY("from"), &buf[5], -1));
 348                 }
 349                 if (!strncasecmp(buf, "time=", 5)) {
 350                         time_t tt;
 351                         struct tm tm;
 352                         tt = atol(&buf[5]);
 353                         localtime_r(&tt, &tm);
 354                         strftime(datetime, sizeof datetime, "%c", &tm);
 355                         JsonObjectAppend(j, NewJsonPlainString( HKEY("time"), datetime, -1));
 356                 }
 357         }
 358
 359         if (!strcmp(buf, "text")) {
 360                 while ( (ctdl_readline(c, buf, sizeof(buf)) >= 0) && (strcmp(buf, "")) && (strcmp(buf, "000")) ) {
 361                         // rfc822 header parsing here
 362                         if (!strncasecmp(buf, "Content-transfer-encoding:", 26)) {
 363                                 strcpy(content_transfer_encoding, &buf[26]);
 364                                 striplt(content_transfer_encoding);
 365                         }
 366                         if (!strncasecmp(buf, "Content-type:", 13)) {
 367                                 strcpy(content_type, &buf[13]);
 368                                 striplt(content_type);
 369                         }
 370                 }
 371                 raw_msg = ctdl_readtextmsg(c);
 372         }
 373         else {
 374                 raw_msg = NULL;
 375         }
 376
 377         if (raw_msg) {
 378
 379                 // These are the encodings we know how to handle.  Decode in-place.
 380
 381                 if (!strcasecmp(content_transfer_encoding, "base64")) {
 382                         StrBufDecodeBase64(raw_msg);
 383                 }
 384                 if (!strcasecmp(content_transfer_encoding, "quoted-printable")) {
 385                         StrBufDecodeQP(raw_msg);
 386                 }
 387
 388                 // At this point, raw_msg contains the decoded message.
 389                 // Now run through the renderers we have available.
 390
 391                 if (!strncasecmp(content_type, "text/html", 9)) {
 392                         sanitized_msg = html2html("UTF-8", 0, c->room, msgnum, raw_msg);
 393                 }
 394                 else if (!strncasecmp(content_type, "text/plain", 10)) {
 395                         sanitized_msg = text2html("UTF-8", 0, c->room, msgnum, raw_msg);
 396                 }
 397                 else if (!strncasecmp(content_type, "text/x-citadel-variformat", 25)) {
 398                         sanitized_msg = variformat2html(raw_msg);
 399                 }
 400                 else {
 401                         sanitized_msg = NewStrBufPlain(HKEY("<i>No renderer for this content type</i><br>"));
 402                 }
 403                 FreeStrBuf(&raw_msg);
 404
 405                 // If sanitized_msg is not NULL, we have rendered the message and can output it.
 406
 407                 if (sanitized_msg) {
 408                         JsonObjectAppend(j, NewJsonString(HKEY("text"), sanitized_msg, NEWJSONSTRING_SMASHBUF));
 409                 }
 410         }
 411
 412         StrBuf *sj = NewStrBuf();
 413         SerializeJson(sj, j, 1);                        // '1' == free the source object
 414
 415         add_response_header(h, strdup("Content-type"), strdup("application/json"));
 416         h->response_code = 200;
 417         h->response_string = strdup("OK");
 418         h->response_body_length = StrLength(sj);
 419         h->response_body = SmashStrBuf(&sj);
 420 }