Catch what users say

[stevomitric]

how can I read JUST the last line of a file?

With the built-in functions you cant. You would need to read the whole file in order to get to the last line. This is very ineffective as log files can get huge (we're talking in MB).
In my old script i deleted the log every time i read it. Take a look:

		// stEvo

init() {
    level.logName = "log.log";
    level.logTimeRefresh = 1;
    level.triggerString = "!";    // can be any multi-lenght string
    
    setCvar("g_log", "scriptdata/"+level.logName);    //
    setCvar("g_logSync", 1);                        // You may need double restart if u havent set the cvars before
    
    thread main_loop();
}

main_loop() {
    wait 10;
    while (1) {
        clearLog();
        wait level.logTimeRefresh;
        
        filenum = OpenFile( level.logName, "read" );
        if (filenum == -1)  continue;
        
        commas = freadln(filenum);
        while (commas > 0) {
            for (i = 0; i < commas; i++) {
                response = fgetarg(filenum,i);
                chr = 0;

                type = "";
                for (; chr < response.size; chr++)
                    if (response[chr] != ";") type += response[chr]; else break; chr ++;
                
                guid = "";
                for (; chr < response.size; chr++)
                    if (response[chr] != ";") guid += response[chr]; else break; chr ++;
                
                id = "";
                for (; chr < response.size; chr++)
                    if (response[chr] != ";") id += response[chr]; else break; chr ++;
                
                name = "";
                for (; chr < response.size; chr++)
                    if (response[chr] != ";") name += response[chr]; else break; chr ++;
                    
                message = "";
                for (; chr < response.size; chr++)
                    if (response[chr] != ";") message += response[chr]; else break; chr ++;
            
                if (validType(type) && validMessage(message))
                    thread doMessage(fixMessage(ToLower(message)), guid, id, name);
            }
            
            commas = freadln(filenum);
        }
        
        closeFile(filenum);
    }
}

doMessage(message, guid, id, name) {

    if (startsWith(message, "id"))
        getId(id, message);    

    else if (startsWith(message, "kick"))
        kickPlayer(id, message);
    
    else
        getPlayerByNum(int(id)) iprintlnbold("Invalid Command.");
}

//******************************************************************************************************************

kickPlayer(id, message) {
    player = getPlayerByNum(int(id));
    //if (isDefined(player.admin) && !player.admin) { player iprintlnbold("You are not admin."); return;} // Uncomment
    
    name = ""; chr = 0;
    for (; chr < message.size; chr ++) if (message[chr] == " ") break; chr ++;
    for (; chr < message.size; chr ++) name += message[chr];

    playerToKick = getPlayerByName(name);
    if (!isPlayer(playerToKick)) { player iprintlnbold("To many or no matches: " + name); return;}
    player SayAll("[^1BOT^7]: Kicked player: " + playerToKick.name ); wait 2;
    kick(playerToKick getEntityNumber());
}

getId(id, message) {
    player = getPlayerByNum(int(id));
    //if (isDefined(player.admin) && !player.admin) { player iprintlnbold("You are not admin."); return;} // Uncomment 
    
    name = ""; chr = 0;
    for (; chr < message.size; chr ++) if (message[chr] == " ") break; chr ++;
    for (; chr < message.size; chr ++) name += message[chr];
    
    players = getEntArray( "player", "classname" );
    for (i = 0; i < players.size; i++)
        if (IsSubStr(ToLower(players[i].name), name) ) {
            player SayAll("[^1BOT^7]: " + players[i].name + " ^7 - ID: ^1#" + players[i] getEntityNumber() );
            wait 1;
        }
}

//******************************************************************************************************************

clearLog() {
    filenum = OpenFile( level.logName, "write" );
    closeFile(filenum);
}

validMessage(message) {
    if (message.size < 3) return 0;
    return (GetSubStr(message, 0, level.triggerString.size)  == level.triggerString || GetSubStr(message, 1, level.triggerString.size+1)  == level.triggerString);
}

validType(type) {
    return (type.size > 2 && IsSubStr(type, "say") );
}

fixMessage(message) {
    if (GetSubStr(message, 0, level.triggerString.size) == level.triggerString) return GetSubStr(message, level.triggerString.size, message.size);
    if (GetSubStr(message, 1, level.triggerString.size+1) == level.triggerString) return GetSubStr(message, level.triggerString.size+1, message.size);
    return "";
}

getPlayerByNum(num) {
    players = getentarray("player", "classname");
    for(i = 0; i < players.size; i++)
        if (players[i] getEntityNumber() == num)
            return players[i];
}

getPlayerByName(name) {
    // -2 - Invalid parameter
    // -1 - No player found by that name
    //  0 - More then 1 player found
    
    if (name.size == 0 || name == " ") return -2;
    if (name[0] == "#") {
        name = GetSubStr(name, 1, name.size);
        id = int(name);
        player = getPlayerByNum(id);
        if (IsPlayer(player)) return player; return -1; 
    }
    
    players = getentarray("player", "classname");
    player = -1;
    
    for(i = 0; i < players.size; i++)
        if (IsSubStr(ToLower(players[i].name), name))
            if (player != -1) return 0;
            else player = players[i];
    return player;
}

startsWith(str, start) {
    if (start.size > str.size) return 0;
    for (i = 0; i < start.size; i++)
        if (str[i] != start[i]) return 0;
    return 1;
} 
	

Its far from perfect but it gets the job done.

I know i can read the log, but is there any other option?

Not that i'm aware of (apart from libcod).