//
// The line above should be left blank to avoid script errors in OpenSim.

// Sloodle configuration notecard reader
// Reads a configuration notecard and transmits the data via link messages to other scripts
// If the notecard changes, then it automatically resets.
//
// Part of the Sloodle project (www.sloodle.org)
// Copyright (c) 2007-8 Sloodle
// Released under the GNU GPL v3
//
// Contributors:
//  Edmund Edgar
//  Peter R. Bloomfield


integer SLOODLE_CHANNEL_OBJECT_DIALOG = -3857343;
string SLOODLE_CONFIG_NOTECARD = "sloodle_config";
string SLOODLE_EOF = "sloodleeof";

key sloodle_notecard_key = NULL_KEY;
integer sloodle_notecard_line = 0;

string COMMENT_PREFIX = "//";

key latestnotecard = NULL_KEY; // The most recently read notecard



///// TRANSLATION /////

// Link message channels
integer SLOODLE_CHANNEL_TRANSLATION_REQUEST = -1928374651;
integer SLOODLE_CHANNEL_TRANSLATION_RESPONSE = -1928374652;

// Translation output methods
string SLOODLE_TRANSLATE_LINK = "link";             // No output parameters - simply returns the translation on SLOODLE_TRANSLATION_RESPONSE link message channel
string SLOODLE_TRANSLATE_SAY = "say";               // 1 output parameter: chat channel number
string SLOODLE_TRANSLATE_WHISPER = "whisper";       // 1 output parameter: chat channel number
string SLOODLE_TRANSLATE_SHOUT = "shout";           // 1 output parameter: chat channel number
string SLOODLE_TRANSLATE_REGION_SAY = "regionsay";  // 1 output parameter: chat channel number
string SLOODLE_TRANSLATE_OWNER_SAY = "ownersay";    // No output parameters
string SLOODLE_TRANSLATE_DIALOG = "dialog";         // Recipient avatar should be identified in link message keyval. At least 2 output parameters: first the channel number for the dialog, and then 1 to 12 button label strings.
string SLOODLE_TRANSLATE_LOAD_URL = "loadurl";      // Recipient avatar should be identified in link message keyval. 1 output parameter, containing the URL.
string SLOODLE_TRANSLATE_HOVER_TEXT = "hovertext";  // 2 output parameters: colour <r,g,b>, and alpha value

// Send a translation request link message
sloodle_translation_request(string output_method, list output_params, string string_name, list string_params, key keyval, string batch)
{
    llMessageLinked(LINK_THIS, SLOODLE_CHANNEL_TRANSLATION_REQUEST, output_method + "|" + llList2CSV(output_params) + "|" + string_name + "|" + llList2CSV(string_params) + "|" + batch, keyval);
}

///// ----------- /////


///// FUNCTIONS /////


sloodle_tell_other_scripts(string msg)
{
    sloodle_debug("notecard sending message to other scripts: "+msg);
    llMessageLinked(LINK_SET, SLOODLE_CHANNEL_OBJECT_DIALOG, msg, NULL_KEY);   
}

sloodle_debug(string msg)
{
    //llWhisper(0,msg);
}

sloodle_handle_command(string str) 
{
    list bits = llParseString2List(str,["|"],[]);
    integer numbits = llGetListLength(bits);
    
    string name = llList2String(bits,0);
    string value = "";
    if (numbits >= 2) llList2String(bits,1);

    // Check the command
    if (name == "do:reset") {
        // Reset
        sloodle_debug("Resetting configuration notecard reader");
        llResetScript();
    } else if (name == "do:requestconfig") {
        // Configuration request
        sloodle_start_reading_notecard();
    }
}

sloodle_start_reading_notecard()
{
    // Do we have a configuratio notecard?
    if (llGetInventoryType(SLOODLE_CONFIG_NOTECARD) == INVENTORY_NOTECARD) {
        // Start reading it
        sloodle_translation_request(SLOODLE_TRANSLATE_HOVER_TEXT, [<0.0,1.0,0.0>, 1.0], "readingconfignotecard", [], NULL_KEY, "");
        sloodle_debug("starting reading notecard");
        sloodle_notecard_line = 0;
        sloodle_notecard_key = llGetNotecardLine("sloodle_config", 0); // read the first line. The dataserver event will get the next one.
        latestnotecard = llGetInventoryKey(SLOODLE_CONFIG_NOTECARD);
    } else {
        sloodle_debug("No notecard called "+SLOODLE_CONFIG_NOTECARD+" found - skipping notecard configuration");
        latestnotecard = NULL_KEY;
    }
}


default 
{
    on_rez(integer start_param)
    {
        llResetScript();
    }
    
    state_entry() 
    {
        // Pause for a moment, in case all scripts were reset at the same time
        llSleep(0.2);
        // Go!
        sloodle_start_reading_notecard();
    }
    
    dataserver(key requested, string data)
    {
        if ( requested == sloodle_notecard_key )  // make sure we are getting the data we want
        {
            sloodle_notecard_key = NULL_KEY;
            if ( data != EOF )
            {
                // If this is a comment line, then do not forward it
                string trimmeddata = llStringTrim(data, STRING_TRIM_HEAD);
                if (llSubStringIndex(trimmeddata, COMMENT_PREFIX) != 0) sloodle_tell_other_scripts(data);
                // Advance to the next line
                sloodle_notecard_line++;
                sloodle_notecard_key = llGetNotecardLine("sloodle_config",sloodle_notecard_line);
            } else {
                // This is the end of the configuration data
                llSleep(0.2);
                sloodle_tell_other_scripts(SLOODLE_EOF);
                llSetText("", <0.0,0.0,0.0>, 0.0);
            }
        }
    }
    
    link_message(integer sender_num, integer num, string str, key id) {
        // Ignore debug messages
        if (num == DEBUG_CHANNEL) return;
        // Is this an object dialog message?
        if (num == SLOODLE_CHANNEL_OBJECT_DIALOG) {
            sloodle_handle_command(str);
        }
    }
    
    changed(integer change) {
        // If the inventory is changed, and we have a Sloodle config notecard, then use it to re-initialise
        if (change & CHANGED_INVENTORY && llGetInventoryType(SLOODLE_CONFIG_NOTECARD) == INVENTORY_NOTECARD) {
            // If the current notecard is not the same as the one we read most recently, then reset
            if (llGetInventoryKey(SLOODLE_CONFIG_NOTECARD) != latestnotecard) llResetScript();
        }
    }
}
// Please leave the following line intact to show where the script lives in Git:
// SLOODLE LSL Script Git Location: assets/sloodle_setup_notecard.lslp