// The virtual "window" where the StatusMonitor "writes" to.

// Copyright (C) 2005-2006  Francisco V. Saldana
// 
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
// 
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
// GNU General Public License for more details.
// 
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
// 
// Francisco V. Saldana can be contacted using his email account 
//  username: dressedinblue, at domain: gmail.com
// and in Second Life by IMming Christopher Omega

// ========== For method invocation ==========
string randomStr(string chars, integer len) {
    integer numChars = llStringLength(chars);
    string ret;
    integer i;
    for (i = 0; i < len; i++) {
        integer randIndex = llFloor(llFrand(numChars));
        ret += llGetSubString(chars, randIndex, randIndex);
    }
    return ret;
}

string SEPERATOR_CHARS = "`~!@#$%^&*()-_+[]{}\|'\";/?.>,<";
integer SEPERATOR_LEN  = 3;
string dumpList2String(list src) {
    // Generate a seperator not present in any of the
    // elements in the list.
    string chars = (string) src; // Squashes all elements together.
    string seperator;
    do {
        seperator = randomStr(SEPERATOR_CHARS, SEPERATOR_LEN);
    } while (llSubStringIndex(chars, seperator) != -1);
    return seperator + llDumpList2String(src, seperator);
}

list parseStringKeepNulls(string src) {
    // The seperator should be the first SEPERATOR_LEN
    // characters in the string.
    return llParseStringKeepNulls(llDeleteSubString(src, 0, SEPERATOR_LEN - 1),
        [llGetSubString(src, 0, SEPERATOR_LEN - 1)], []);
}

callMethod(integer callId, string methodName, list parameters) { 
    llMessageLinked(LINK_THIS, callId,
        dumpList2String(parameters), methodName);
}

returnValue(string methodName, integer methodIdentifyer, list value) {
    llMessageLinked(LINK_THIS, methodIdentifyer, 
        dumpList2String(value), methodName + "_ret");
}
// =============================================

trigger_setDisplayLineText(integer line, string text) {
    callMethod(0, "setDisplayLineText", [line, text]);
}

trigger_setDisplayLineColor(integer line, vector color) {
    callMethod(0, "setDisplayLineColor", [line, color]);
}

trigger_pong(string moduleName) {
    callMethod(0, "pong", [moduleName]);
}

integer LINE = 12;
integer statusBarEnabled = TRUE;
string this;
default {
    state_entry() {
        this = llGetScriptName();
    }
    
    link_message(integer sender, integer num, string parameters, key methodName) {
        if (methodName == "displayStatusMessage") {
            list paramList = parseStringKeepNulls(parameters);
            // Method signature:
            // displayStatusMsg(string message)
            string message = llList2String(paramList, 0);
            trigger_setDisplayLineText(LINE, message); 
            trigger_setDisplayLineColor(LINE, <1, 1, 1>);
        } else if (methodName == "setStatusDisplay") {
            list paramList = parseStringKeepNulls(parameters);
            // Method signature:
            // setStatusDisplay(boolean show)
            integer show = (integer) llList2String(paramList, 0);
            statusBarEnabled = show;
        } else if (methodName == "ping") { 
            list paramList = parseStringKeepNulls(parameters);
            // Method signature:
            // ping(string moduleName)
            string moduleName = llList2String(paramList, 0);
            if (moduleName == this)
                trigger_pong(this);
        }
    }
}