<?php
	/*
	-------------------------------------
	Author:    Chris Hilbert (Hilbe)
	Email:     chris.hilbert@fileflash.com
	Website:   http://www.fileflash.com
	File Name: tvguide.php
	Version:   1.1
	Built:     05/05/03
	Updated:   05/06/03
	Requires:  PHP 4.x or greater

	Licence:
	This source is freely distributable.  If you borrow, change, or use any of the code, please give me credit.

	Contributers:
	TrillHunter
	-------------------------------------

	Required Variables:

	$I, $Zip

	Usage:

	tvguide.php?I=#####&Zip=#####

	Optional Variables:
	$Channels

	Usage:
	tvguide.php?I=#####&Zip=#####&Channels=#,#,# ...

	Tip:

	To get a I and Zip, disable cookies in your browser and visit http://www.tvguide.com/Listings/.  Enter your zip code and select your area.

	You should be able to copy/paste from the URL of the listings grid.

	*/
	
	//Test For Required Variables
	if (!($I && $Zip))
	{
		echo "Error:  You did not supply either an I or Zip value, please visit www.tvguide.com and disable cookies to get an I and Zip value.  See your address bar for the values:  http://www.tvguide.com/Listings/index.asp?I=<b>#####</b>&Zip=<b>#####</b>.";
		return;
	}

	//Build URL to TV Guide Data
	$tvURL = "http://www.tvguide.com/Listings/index.asp?I=" . $I . "&zip=" . $Zip;
	$link  = "http://www.tvguide.com/Listings/index.asp?I=" . $I . "&amp;zip=" . $Zip;

	//Open TV Guide URL and Get Contents
	//Select which code to use based on your version of PHP4.

	/*
	//Option 1 (for PHP 4.x)
	$handle = fopen ($tvURL,"rb");
	if (!$handle)
	{
		echo "Could not open URL: " . $tvURL;
		return;
	}
	for ($count = 0; $count < 1000 && !feof ($handle); $count++) {
		$tvHTML .= fread ($handle,1024);
	}
	fclose ($handle);
	*/

	//Option 2 (for PHP 4.3.x or greater)
	$tvHTML = file_get_contents($tvURL);

    if (!strcmp($tvHTML,""))
	{
		echo "Nothing read from URL: " . $tvURL;
		return;
	}

	//Test For Successful Data Pull and Match
	if (!preg_match("#<!--BEGIN COMPONENT OUTPUT-->(.*)<!--END COMPONENT OUTPUT-->#s",$tvHTML,$tvArray))
	{
		echo "The supplied HTML was not formatted correctly for parsing.<BR><BR>";
		echo $tvHTML;
		return;
	}
	$tvHTML = ""; // We're done with this; save some memory
	$tvArray[0] = ""; // We don't need this; save some memory

	//Pull Out Data Portion

	//Build Time Array
	if (!preg_match("#^.*?<nobr>(\d\d?):(\d\d) ([AP]M)</nobr>#s",$tvArray[1],$tvTime))
	{
		echo "Couldn't parse time information.<BR><BR>";
		echo $tvArray[1];
		return;
	}

	//Build Channels Array
    if (!preg_match_all("#<TR.*?>(\d+)&nbsp;([^<]{1,10})</(.*?)</TR>#s",$tvArray[1],$tvChannels))
	{
		echo "Couldn't parse channels.<BR><BR>";
		echo $tvArray[1];
		return;
	}
	$tvArray[1] = ""; // We're done with this; save some memory

	//Create Array Of User Defined Channels
	if ($Channels)
	{
		$myChannels = explode(",",$Channels);
	}

	//Begin RSS Construction

	//Send XML Header
	header("Content-Type: text/xml; charset=utf-8");
	echo "<?xml version='1.0' encoding='utf-8' ?>";
?>

<rss version="0.91">
  <channel>
	<title><? echo $Zip; ?> TV Guide</title>
	<description>TV Guide</description>
	<link>http://www.tvguide.com</link>
	<copyright>Copyright <? echo date("Y"); ?> TV Guide Magazine Group, Inc.</copyright>

<?
	//Begin Channel Loop
	for ($counter = 0; $counter < count($tvChannels[0]); $counter++)
	{

		//Check For Optional Variable and See If Channel In Optional Variable
		if (!$Channels || in_array($tvChannels[1][$counter],$myChannels))
		{
			$tvStation = $tvChannels[1][$counter] . " " . $tvChannels[2][$counter];
			$tvStation = preg_replace("#([^A-Za-z0-9 ,'!\?\:\-\.\$\(\)])#e",  "'&#' . ord('\\1') . ';'",  $tvStation);

			//Build Show Array
			preg_match_all("#<TD.*? colspan=(\d+)\D.*?>([^<&]+)<#s",$tvChannels[3][$counter],$tvShows);
?>
	<item>
		<title><? echo $tvStation; ?></title>
		<link><? echo $link; ?></link>
		<description><?
			//Add Show Times To Description
			$hours = $tvTime[1];
			$minutes = $tvTime[2];
			$ampm = $tvTime[3];
			$showName = preg_replace("#([^A-Za-z0-9 ,'!\?\:\-\.\$\(\)])#e",  "'&#' . ord('\\1') . ';'",  $tvShows[2][0]);
			echo "$hours:$minutes $ampm - $showName";

			for ($showCounter = 1; $showCounter < count($tvShows[0]); $showCounter++)
			{
				$minutes += 5 * $tvShows[1][$showCounter - 1];
				while ($minutes >= 60)
				{
					$minutes -= 60;
					$hours++;
				}
				if ($minutes < 10)
				{
					$minutes = "0" . $minutes;
				}
				if ($hours >= 12)
				{
					if ($ampm == "AM")
					{
						$ampm = "PM";
					}
					else
					{
						$ampm = "AM";
					}

					if ($hours > 12)
					{
						$hours -= 12;
					}
				}
				$showName = preg_replace("#([^A-Za-z0-9 ,'!\?\:\-\.\$\(\)])#e",  "'&#' . ord('\\1') . ';'",  $tvShows[2][$showCounter]);
				echo "\n$hours:$minutes $ampm - $showName";
			}
		?></description>
	</item>
<?
		}
	}
	//End Channel Loop
?>
  </channel>
</rss>