webcit/wiki.c

   1 /*
   2  * Functions pertaining to rooms with a wiki view
   3  *
   4  * Copyright (c) 2009-2012 by the citadel.org team
   5  *
   6  * This program is open source software.  You can redistribute it and/or
   7  * modify 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 #include "dav.h"
  17
  18 /*
  19  * Convert a string to something suitable as a wiki index
  20  */
  21 void str_wiki_index(char *s)
  22 {
  23         int i;
  24
  25         if (s == NULL) return;
  26
  27         /* First remove all non-alphanumeric characters */
  28         for (i=0; i<strlen(s); ++i) {
  29                 if (!isalnum(s[i])) {
  30                         strcpy(&s[i], &s[i+1]);
  31                 }
  32         }
  33
  34         /* Then make everything lower case */
  35         for (i=0; i<strlen(s); ++i) {
  36                 s[i] = tolower(s[i]);
  37         }
  38 }
  39
  40 /*
  41  * Display a specific page from a wiki room
  42  *
  43  * "rev" may be set to an empty string to display the current version.
  44  * "do_revert" may be set to nonzero to perform a reversion to the specified version.
  45  */
  46 void display_wiki_page_backend(char *pagename, char *rev, int do_revert)
  47 {
  48         const StrBuf *Mime;
  49         long msgnum = (-1L);
  50         char buf[256];
  51
  52         if (WC->CurRoom.view != VIEW_WIKI) {
  53                 wc_printf(_("'%s' is not a Wiki room."), ChrPtr(WC->CurRoom.name) );
  54                 return;
  55         }
  56
  57         if (IsEmptyStr(pagename)) {
  58                 strcpy(pagename, "home");
  59         }
  60
  61         str_wiki_index(pagename);       /* convert index name to lowercase and numeric only */
  62
  63         if ((rev != NULL) && (strlen(rev) > 0)) {
  64                 /* read an older revision */
  65                 serv_printf("WIKI rev|%s|%s|%s", pagename, rev, (do_revert ? "revert" : "fetch") );
  66                 serv_getln(buf, sizeof buf);
  67                 if (buf[0] == '2') {
  68                         msgnum = extract_long(&buf[4], 0);
  69                 }
  70         }
  71         else {
  72                 /* read the current revision */
  73                 msgnum = locate_message_by_uid(pagename);
  74         }
  75
  76         if (msgnum >= 0L) {
  77                 read_message(WC->WBuf, HKEY("view_message"), msgnum, NULL, &Mime);
  78                 return;
  79         }
  80
  81         wc_printf("<br><br>"
  82                 "<div align=\"center\">"
  83                 "<table border=\"0\" bgcolor=\"#ffffff\" cellpadding=\"10\">"
  84                 "<tr><td align=\"center\">"
  85         );
  86         wc_printf("<br><b>");
  87         wc_printf(_("There is no page called '%s' here."), pagename);
  88         wc_printf("</b><br><br>");
  89         wc_printf(_("Select the 'Edit this page' link in the room banner "
  90                 "if you would like to create this page."));
  91         wc_printf("<br><br>");
  92         wc_printf("</td></tr></table></div>\n");
  93 }
  94
  95
  96 /*
  97  * Display a specific page from a wiki room
  98  */
  99 void display_wiki_page(void)
 100 {
 101         char pagename[128];
 102         char rev[128];
 103         int do_revert = 0;
 104
 105         output_headers(1, 1, 1, 0, 0, 0);
 106         safestrncpy(pagename, bstr("page"), sizeof pagename);
 107         str_wiki_index(pagename);
 108         safestrncpy(rev, bstr("rev"), sizeof rev);
 109         do_revert = atoi(bstr("revert"));
 110         display_wiki_page_backend(pagename, rev, do_revert);
 111         wDumpContent(1);
 112 }
 113
 114
 115 /*
 116  * Display the revision history for a wiki page (template callback)
 117  */
 118 void tmplput_display_wiki_history(StrBuf *Target, WCTemplputParams *TP)
 119 {
 120         char pagename[128];
 121         StrBuf *Buf;
 122         int row = 0;
 123
 124         safestrncpy(pagename, bstr("page"), sizeof pagename);
 125         str_wiki_index(pagename);
 126
 127         serv_printf("WIKI history|%s", pagename);
 128         Buf = NewStrBuf();
 129         StrBuf_ServGetln(Buf);
 130         if (GetServerStatus(Buf, NULL) == 1) {
 131
 132                 time_t rev_date;
 133                 char rev_date_displayed[64];
 134                 StrBuf *rev_uuid = NewStrBuf();
 135                 StrBuf *author = NewStrBuf();
 136                 StrBuf *node = NewStrBuf();
 137
 138                 wc_printf("<table class=\"wiki_history_background\">");
 139
 140                 wc_printf("<th>%s</th>", _("Date"));
 141                 wc_printf("<th>%s</th>", _("Author"));
 142
 143                 while((StrBuf_ServGetln(Buf) >= 0) &&  strcmp(ChrPtr(Buf), "000")) {
 144
 145                         rev_date = extract_long(ChrPtr(Buf), 1);
 146                         webcit_fmt_date(rev_date_displayed, sizeof rev_date_displayed, rev_date, DATEFMT_FULL);
 147                         StrBufExtract_token(author, Buf, 2, '|');
 148
 149                         wc_printf("<tr bgcolor=\"%s\">", ((row%2) ? "#FFFFFF" : "#DDDDDD"));
 150                         wc_printf("<td>%s</td><td>", rev_date_displayed);
 151                         if (!strcasecmp(ChrPtr(node), (char *)WC->serv_info->serv_nodename)) {
 152                                 escputs(ChrPtr(author));
 153                                 wc_printf(" @ ");
 154                                 escputs(ChrPtr(node));
 155                         }
 156                         else {
 157                                 wc_printf("<a href=\"showuser?who=");
 158                                 urlescputs(ChrPtr(author));
 159                                 wc_printf("\">");
 160                                 escputs(ChrPtr(author));
 161                                 wc_printf("</a>");
 162                         }
 163                         wc_printf("</td>");
 164
 165                         if (row == 0) {
 166                                 wc_printf("<td><a href=\"wiki?page=%s", bstr("page"));
 167                                 wc_printf("?go="); urlescputs(ChrPtr(WC->CurRoom.name));
 168                                 wc_printf("\">%s</a></td>", _("(show)"));
 169                                 wc_printf("<td>(%s)</td>", _("Current version"));
 170                         }
 171
 172                         else {
 173                                 wc_printf("<td><a href=\"wiki?page=%s?rev=%s",
 174                                         bstr("page"),
 175                                         ChrPtr(rev_uuid)
 176                                 );
 177                                 wc_printf("?go="); urlescputs(ChrPtr(WC->CurRoom.name));
 178                                 wc_printf("\">%s</a></td>", _("(show)"));
 179                                 wc_printf("<td><a href=\"javascript:GetLoggedInFirst(encodeURIComponent('wiki?page=%s?rev=%s?revert=1'))\">%s</a></td>",
 180                                         bstr("page"),
 181                                         ChrPtr(rev_uuid),
 182                                         _("(revert)")
 183                                 );
 184                         }
 185                         wc_printf("</tr>\n");
 186
 187                         /* Extract all fields except the author and date after displaying the row.  This
 188                          * is deliberate, because the timestamp reflects when the diff was written, not
 189                          * when the version which it reflects was written.  Similarly, the name associated
 190                          * with each diff is the author who created the newer version of the page that
 191                          * made the diff happen.
 192                          */
 193                         StrBufExtract_token(rev_uuid, Buf, 0, '|');
 194                         StrBufExtract_token(node, Buf, 3, '|');
 195                         ++row;
 196                 }
 197
 198                 wc_printf("</table>\n");
 199                 FreeStrBuf(&author);
 200                 FreeStrBuf(&node);
 201                 FreeStrBuf(&rev_uuid);
 202         }
 203         else {
 204                 wc_printf("%s", ChrPtr(Buf));
 205         }
 206
 207         FreeStrBuf(&Buf);
 208 }
 209
 210
 211
 212 /*
 213  * Display the revision history for a wiki page
 214  */
 215 void display_wiki_history(void)
 216 {
 217         output_headers(1, 1, 1, 0, 0, 0);
 218         do_template("wiki_history");
 219         wDumpContent(1);
 220 }
 221
 222
 223 /*
 224  * Display a list of all pages in a Wiki room (template callback)
 225  */
 226 void tmplput_display_wiki_pagelist(StrBuf *Target, WCTemplputParams *TP)
 227 {
 228         StrBuf *Buf;
 229         int row = 0;
 230
 231         if (!IsEmptyStr(bstr("query"))) {
 232                 serv_printf("MSGS SEARCH|%s||4", bstr("query"));        /* search-reduced list */
 233         }
 234         else {
 235                 serv_printf("MSGS ALL|||4");                            /* full list */
 236         }
 237
 238         Buf = NewStrBuf();
 239         StrBuf_ServGetln(Buf);
 240         if (GetServerStatus(Buf, NULL) == 1) {
 241                 StrBuf *pagetitle = NewStrBuf();
 242
 243                 wc_printf("<table class=\"wiki_pagelist_background\">");
 244                 wc_printf("<th>%s</th>", _("Page title"));
 245
 246                 while((StrBuf_ServGetln(Buf) >= 0) && strcmp(ChrPtr(Buf), "000")) {
 247                         StrBufExtract_token(pagetitle, Buf, 1, '|');
 248
 249                         if (!bmstrcasestr((char *)ChrPtr(pagetitle), "_HISTORY_")) {    /* no history pages */
 250                                 wc_printf("<tr bgcolor=\"%s\">", ((row%2) ? "#FFFFFF" : "#DDDDDD"));
 251                                 wc_printf("<td><a href=\"wiki?page=");
 252                                 urlescputs(ChrPtr(pagetitle));
 253                                 wc_printf("\">");
 254                                 escputs(ChrPtr(pagetitle));
 255                                 wc_printf("</a></td>");
 256                                 wc_printf("</tr>\n");
 257                                 ++row;
 258                         }
 259                 }
 260                 wc_printf("</table>\n");
 261                 FreeStrBuf(&pagetitle);
 262         }
 263
 264         FreeStrBuf(&Buf);
 265 }
 266
 267
 268 /*
 269  * Display a list of all pages in a Wiki room.  Search requests in a Wiki room also go here.
 270  */
 271 void display_wiki_pagelist(void)
 272 {
 273         output_headers(1, 1, 1, 0, 0, 0);
 274         do_template("wiki_pagelist");
 275         wDumpContent(1);
 276 }
 277
 278
 279 int wiki_Cleanup(void **ViewSpecific)
 280 {
 281         char pagename[5];
 282         safestrncpy(pagename, "home", sizeof pagename);
 283         display_wiki_page_backend(pagename, "", 0);
 284         wDumpContent(1);
 285         return 0;
 286 }
 287
 288
 289 int ConditionalHaveWikiPage(StrBuf *Target, WCTemplputParams *TP)
 290 {
 291         const char *page;
 292         const char *pch;
 293         long len;
 294
 295         page = BSTR("page");
 296         GetTemplateTokenString(Target, TP, 2, &pch, &len);
 297         return strcasecmp(page, pch) == 0;
 298 }
 299
 300
 301 int ConditionalHavewikiType(StrBuf *Target, WCTemplputParams *TP)
 302 {
 303         wcsession *WCC = WC;
 304         const char *pch;
 305         long len;
 306
 307         GetTemplateTokenString(Target, TP, 2, &pch, &len);
 308         return bmstrcasestr((char *)ChrPtr(WCC->Hdr->HR.ReqLine), pch) != NULL;
 309 }
 310
 311
 312 int wiki_PrintHeaderPage(SharedMessageStatus *Stat, void **ViewSpecific)
 313 {
 314         /* this function was intentionaly left empty. */
 315         return 0;
 316 }
 317
 318 int wiki_GetParamsGetServerCall(SharedMessageStatus *Stat,
 319                                 void **ViewSpecific,
 320                                 long oper,
 321                                 char *cmd,
 322                                 long len,
 323                                 char *filter,
 324                                 long flen)
 325 {
 326         if (oper == do_search)
 327                 display_wiki_pagelist();
 328         else
 329                 http_redirect("wiki?page=home");
 330
 331         return 300;
 332 }
 333
 334
 335 void
 336 InitModule_WIKI
 337 (void)
 338 {
 339         RegisterReadLoopHandlerset(
 340                 VIEW_WIKI,
 341                 wiki_GetParamsGetServerCall,
 342                 wiki_PrintHeaderPage,
 343                 NULL,
 344                 NULL,
 345                 NULL,
 346                 NULL,
 347                 wiki_Cleanup
 348         );
 349
 350         WebcitAddUrlHandler(HKEY("wiki"), "", 0, display_wiki_page, 0);
 351         WebcitAddUrlHandler(HKEY("wiki_history"), "", 0, display_wiki_history, 0);
 352         WebcitAddUrlHandler(HKEY("wiki_pagelist"), "", 0, display_wiki_pagelist, 0);
 353         RegisterNamespace("WIKI:DISPLAYHISTORY", 0, 0, tmplput_display_wiki_history, NULL, CTX_NONE);
 354         RegisterNamespace("WIKI:DISPLAYPAGELIST", 0, 0, tmplput_display_wiki_pagelist, NULL, CTX_NONE);
 355         RegisterConditional(HKEY("COND:WIKI:PAGE"), 1, ConditionalHaveWikiPage, CTX_NONE);
 356         RegisterConditional(HKEY("COND:WIKI:TYPE"), 1, ConditionalHavewikiType, CTX_NONE);
 357 }