/*    /secure/cmds/players/history.c
 *    from the Nightmare IVr3 Object Library
 *    command to view history information
 *    created by Descartes of Borg 960511
 */

#include <config.h>
#include <lib.h>
#include <message_class.h>

inherit LIB_DAEMON;

mixed cmd(string args) {
    int x;
    
    if( x = to_int(args) ) {
	if( (int)previous_object()->SetHistorySize(x) != x ) {
	    if( x < MIN_HISTORY_SIZE )
	      return "History size must be at least " + MIN_HISTORY_SIZE + ".";
	    else if( x > MAX_HISTORY_SIZE )
              return "History size can be no larger than " + MAX_HISTORY_SIZE +
		".";
	    else return "Invalid history size.";
	}
	else {
	    previous_object()->eventPrint("History size set to: " + x);
	}
    }
    else {
	string array history, arr, tmp = ({});
	int cmd_num, i;
	
	history = (string array)previous_object()->GetHistoryList();
	cmd_num = (int)previous_object()->GetCommandNumber();
	x = (cmd_num - 2) % sizeof(history);
	if( x == 9 ) arr = history;
	else arr = history[(x+1)..] + history[0..x];
	if( cmd_num < sizeof(history) + 1 ) i = 1;
	else i = cmd_num - sizeof(history);
	foreach(string cmd in arr) {
	    if( !cmd ) continue;
	    tmp += ({ sprintf("%:-5d %s", i++, cmd) });
	}
	previous_object()->eventPage(tmp, MSG_SYSTEM);
    }
    return 1;
}
	
string GetHelp(string str) {
    return ("Syntax: <history>\n"
	    "        <history SIZE>\n\n"
	    "This command lets you check your command history.  A command " 
	    "history is kept for the commands you enter, allowing you "
	    "quick access to execute or modify previous commands.  The size "
	    "of your command buffer defaults to " + MIN_HISTORY_SIZE + " but "
	    "may be expanded to " + MAX_HISTORY_SIZE + " if you desire.  You "
	    "can change the size of your history buffer by passing the size "
	    "as an argument to the history command.  Without arguments, the "
	    "command simply prints the commands in your history buffer.\n\n"
	    "The following syntaxes are available for accessing previously "
	    "issued commands:\n"
	    "\t!!\t\texecute the last command\n"
	    "\t!#\t\texecute command number #\n"
	    "\t!-#\t\texecute #th command prior\n"
	    "\t^old^new\treplace 'old' with 'new' in last command and "
	    "execute\n"
	    "\t!#^old^new\tsame as above, except for command number #\n"
	    "\t!#s/old/new/g\tsame as above, except replacing all "
	    "occurrences of 'old'\n\n"
	    "See also: alias, nickname");
}