
	// Requires: PHP 4, Python 2.4
	// You can obtain the campaign number from "View Campaigns" page.
	// You can obtain the code from "My ContextMiner" page.
	// This script assumes you have 'youtube-dl' available at $ytdlLocation.
	// 'youtube-dl' can be downloaded from http://rg3.github.com/youtube-dl/
	// The videos downloaded from running this PHP script will be stored in
	// the current directory.

	$ytdlLocation = "."; // '.' means current directory. Do not put a trailing '/'.

	if ($argc!=3) {
		echo "Usage: php downloadYTVideosClient.php  \n";
		exit;
	}
	$cid = trim($argv[1]);
	$code = trim($argv[2]);
	
	$ytList = file_get_contents("http://www.contextminer.org/downloadYTVideosServer.php?cid=$cid&code=$code");
	
	$fout = fopen("yt.temp", 'w');
	fwrite($fout, $ytList);
	fclose($fout);
	
	$fin = fopen("yt.temp", 'r');
	$line = fgets($fin);
	$response = trim($line);
	if ($response == "Success") {
		while ($line = fgets($fin)) {
			$ytID = trim($line);
			$ytURL = "http://www.youtube.com/watch?v=".$ytID;
			$command = "python " . $ytdlLocation . "/youtube-dl ". $ytURL;
			echo "Downloading $ytID\n";
			system($command);
		}
	}
	else {
		echo "Invalid campaign ID or code.\n";
	}
	fclose($fin);
	system ("rm -f yt.temp");
?>