+//
+// The LAST and NEXT commands are so similar that they are handled by a single function.
+//
+void nntp_last_next(const char *cmd) {
+ if (CtdlAccessCheck(ac_logged_in_or_guest)) return;
+
+ citnntp *nntpstate = (citnntp *) CC->session_specific_data;
+ char which_command[16];
+ int acmd = 0;
+
+ // We're going to store one of these values in the variable 'acmd' so that
+ // we can quickly check later which version of the output we want.
+ enum {
+ NNTP_LAST,
+ NNTP_NEXT
+ };
+
+ extract_token(which_command, cmd, 0, ' ', sizeof which_command);
+
+ if (!strcasecmp(which_command, "last")) {
+ acmd = NNTP_LAST;
+ }
+ else if (!strcasecmp(which_command, "next")) {
+ acmd = NNTP_NEXT;
+ }
+ else {
+ cprintf("500 I'm afraid I can't do that.\r\n");
+ return;
+ }
+
+ // ok, here we go ... fetch the msglist so we can figure out our place in the universe
+ struct nntp_msglist nm;
+ int i = 0;
+ long selected_msgnum = 0;
+
+ nm = nntp_fetch_msglist(&CC->room);
+ if ((nm.num_msgs < 0) || (nm.msgnums == NULL)) {
+ cprintf("500 something bad happened\r\n");
+ return;
+ }
+
+ syslog(LOG_DEBUG, "NNTP: last_next num_msgs=%d and current article was %ld", nm.num_msgs, nntpstate->current_article_number);
+
+ if ( (acmd == NNTP_LAST) && (nm.num_msgs == 0) ) {
+ cprintf("422 no previous article in this group 1\r\n"); // nothing here
+ }
+
+ else if ( (acmd == NNTP_LAST) && (nntpstate->current_article_number <= nm.msgnums[0]) ) {
+ cprintf("422 no previous article in this group 2\r\n"); // already at the beginning
+ }
+
+ else if (acmd == NNTP_LAST) {
+ for (i=0; ((i<nm.num_msgs)&&(selected_msgnum<=0)); ++i) {
+ if ( (nm.msgnums[i] >= nntpstate->current_article_number) && (i > 0) ) {
+ selected_msgnum = nm.msgnums[i-1];
+ }
+ }
+ if (selected_msgnum > 0) {
+ nntpstate->current_article_number = selected_msgnum;
+ cprintf("223 %ld <FIXME@FIXME>\r\n", nntpstate->current_article_number);
+ }
+ else {
+ cprintf("422 no previous article in this group 3\r\n");
+ }
+ }
+
+ else if ( (acmd == NNTP_NEXT) && (nm.num_msgs == 0) ) {
+ cprintf("421 no next article in this group 4\r\n"); // nothing here
+ }
+
+ else if ( (acmd == NNTP_NEXT) && (nntpstate->current_article_number >= nm.msgnums[nm.num_msgs-1]) ) {
+ cprintf("421 no next article in this group 5\r\n"); // already at the end
+ }
+
+ else if (acmd == NNTP_NEXT) {
+ for (i=0; ((i<nm.num_msgs)&&(selected_msgnum<=0)); ++i) {
+ if (nm.msgnums[i] > nntpstate->current_article_number) {
+ selected_msgnum = nm.msgnums[i];
+ }
+ }
+ if (selected_msgnum > 0) {
+ nntpstate->current_article_number = selected_msgnum;
+ cprintf("223 %ld <FIXME@FIXME>\r\n", nntpstate->current_article_number);
+ }
+ else {
+ cprintf("421 no next article in this group 6\r\n");
+ }
+ }
+
+ // should never get here
+ else {
+ cprintf("500 internal error\r\n");
+ }
+
+ if (nm.msgnums != NULL) {
+ free(nm.msgnums);
+ }
+
+}
+
+