<?php

/* vim: ft=php
 This code is used to pregenerate the conference teaser array displayed
 on the PHP.net homepage. It gets the filename
 of the RSS where the info is already fetched, and generates the
 PHP code ready to be included to $outfile 
*/

function pregenerate_conf_teaser($rssfile, $outfile)
{
    // Try to open output file for reading
    $out = @fopen("$outfile~", "w");
    if (!$out) { die("unable to pregenerate conference teaser to '$outfile~'"); }

    // Load the RSS file and register used namespaces
    $sxe = new SimpleXMLElement($rssfile, $GLOBALS["XML_OPTIONS"], true);
    $sxe->registerXPathNamespace("php", "http://php.net/ns/news");

    // Loop over the items and store them in a array
    $STORE = [];
    foreach($sxe->entry as $item) {
        $url = (string)$item->link["href"];
        $subject = (string)$item->category["term"];
		if($subject == "conferences") {
			$subject = "conference";
		}
		elseif($subject != "cfp") {
			// This is neither a conf announcement nor cfp, skip it
			continue;
		}
        $title = (string)$item->title;
		$lastDate = current($item->xpath("php:finalTeaserDate"));
		if(strtotime($lastDate) < strtotime("tomorrow")) {
			// finalTeaserDate has passed, skip it
			continue;
		}
        $STORE[$subject][$url] = $title;
    }

    // Create PHP readable array
    $write = '$CONF_TEASER = ' .var_export($STORE, true);

    // Write & close
    fwrite($out, "<?php\n$write\n?>");
    fclose($out);
    
    // If we don't have new data, delete file
    if (!@filesize("$outfile~")) {
        echo "'$outfile~' was empty, skipping\n";
        unlink("$outfile~");
        return;
    }
  
    // Replace real file with temporary file
    return rename("$outfile~", $outfile);    
}