<?php
// Sample Pluggable datasource for PHP Weathermap 0.9
// - read a pair of values from a database, and return it

// TARGET dbplug:databasename:username:pass:hostkey

class WeatherMapDataSource_tabfile extends WeatherMapDataSource
{
    function Recognise($targetstring)
    {
        if (preg_match("/\.(tsv|txt)$/", $targetstring, $matches)) {
            return true;
        } else {
            return false;
        }
    }

    // function ReadData($targetstring, $configline, $itemtype, $itemname, $map)
    function ReadData($targetstring, &$map, &$item)
    {
        $data[IN] = null;
        $data[OUT] = null;
        $data_time = 0;
        $itemname = $item->name;

        $matches = 0;

        $fd = fopen($targetstring, "r");

        if ($fd) {
            while (!feof($fd)) {
                $buffer = fgets($fd, 4096);
                # strip out any Windows line-endings that have gotten in here
                $buffer = str_replace("\r", "", $buffer);

                if (preg_match("/^$itemname\t(\d+\.?\d*[KMGT]*)\t(\d+\.?\d*[KMGT]*)/",
                    $buffer, $matches)) {
                    $data[IN] = wm_unformat_number($matches[1]);
                    $data[OUT] = wm_unformat_number($matches[2]);
                }
            }
            $stats = stat($targetstring);
            $data_time = $stats['mtime'];
        } else {
            // TODO - some error code to go in here
            wm_warn("TabText ReadData: Couldn't open ($targetstring). [WMTABDATA01]");
        }

        wm_debug( sprintf("TabText ReadData: Returning (%s, %s, %s) \n",
		        string_or_null($data[IN]),
		        string_or_null($data[OUT]),
		        $data_time
        	));

        return (array (
            $data[IN],
            $data[OUT],
            $data_time
        ));
    }
}

// vim:ts=4:sw=4:
?>