function action_updateTagCache()
{
global $config;
doPrint("starting tag cache update...");
print formatDateTime() . "\n";
$data = getData();
$data["lastTagUpdate"] = time();
storeData($data);
$oldTags = array();
foreach (file($config["tagCache"]) as $tag) {
$tag = trim($tag);
$tagArray = explode(";-;", $tag);
if (!isset($tagArray[0]) or count($tagArray) != 8) {
doPrint("removed invalid entry in tagcache: " . count($tagArray));
doPrint($tagArray);
} else {
$oldTags[$tagArray[0]] = $tagArray;
}
}
doPrint("got old tag cache");
$tagCache = array();
$files = getFilesForDirectory($config["searchPath"]);
$new = 0;
$old = 0;
$updates = 0;
$fp = fopen($config["tagCache"], "w+") or die("cannot open tagCache File for writing");
foreach ($files as $file) {
#if(substr($file, -5) == '.flac') {
# continue;
#}
$scan = 0;
$newTime = filemtime($config["searchPath"] . "/" . $file);
if (!isset($oldTags[$file])) {
#doPrint("file is new: ".$file);
$scan = 1;
$new++;
} elseif ($newTime != $oldTags[$file][7]) {
#doPrint("file changed and needs update: ".$file);
$scan = 1;
$updates++;
} else {
#doPrint("file unchanged: ".$file);
$old++;
}
if (!$scan and isset($oldTags[$file])) {
$fileinfo = $oldTags[$file];
} else {
$fileinfo = getTag($config["searchPath"] . "/" . $file);
array_push($fileinfo, $newTime);
array_unshift($fileinfo, $file);
}
fwrite($fp, join(";-;", $fileinfo) . "\n");
}
$data = getData();
$data["lastTagUpdate"] = time();
storeData($data);
fclose($fp);
print "wrote tag cache\n";
print formatDateTime() . "\n";
doPrint("finished tag cache update...");
doPrint("new: " . $new);
doPrint("update: " . $updates);
doPrint("old: " . $old);
}
function getFilesForDirectory($dir)
{
global $config;
$files = array();
if ($handle = opendir($dir)) {
while (false !== ($file = readdir($handle))) {
if ($file != "." && $file != "..") {
if (is_link($dir . "/" . $file) and is_dir(readlink($dir . "/" . $file))) {
# resolve links
$files = array_merge($files, getFilesForDirectory($dir . "/" . $file));
} elseif (is_dir($dir . "/" . $file)) {
$files = array_merge($files, getFilesForDirectory($dir . "/" . $file));
} else {
$tmp = explode(".", $file);
$ext = "." . array_pop($tmp);
if (in_array($ext, array_keys($config["ext"]))) {
$files[] = str_replace($config["searchPath"], "", $dir . "/" . $file);
}
}
}
}
closedir($handle);
}
return $files;
}