/**
* Generate hash of media-items of incoming map-config.
*
* This function detect filesize, last file time modify for each
* media item of the map. Then concat this values and count md5 hash sum
*
* Almost function save counted values in buffer. If scripts try
* recount media-hash sum again - it's returned from buffer.
*
* @param array $map_cfg map-config array
*
* @return string md5 hash value
*/
public static function get_media_hash($map_cfg)
{
static $buffer = array();
if (isset($buffer[$map_cfg['id']]) === false) {
$media_string = '';
foreach ($map_cfg['objects'] as $media_id => $media_cfg) {
list($media_id, $presets, $media_source, $media_cfg) = qpimg_media::parse_media_values($media_id, $media_cfg);
$media_string .= "{$media_id}:{$media_source}:";
if (file_exists($media_source) === false) {
$media_string .= 'not_exists;';
continue;
}
$media_string .= filesize($media_source) . ':' . filemtime($media_source) . ';';
}
$buffer[$map_cfg['id']] = md5($media_string);
}
return $buffer[$map_cfg['id']];
}
/**
* Base generate function. Detect all using maps (incoming map_id & it's attach
* and sub-sub-...-attach maps). Check validate of cache files. Then if need
* generate data and make redirect to CSS-file.
* If $get_link is true then return path to file
*
* @param string $map_id
*
* @param bool $get_link
*
* @return bool global execute status
*/
public static function execute($map_id, $get_link = FALSE)
{
list($map_id) = explode(':', $map_id);
$need_get_maps_stack = array($map_id);
$valid_maps_stack = array();
$invalid_maps_stack = array();
while (count($need_get_maps_stack) > 0) {
$one_map_id = array_shift($need_get_maps_stack);
$one_map_cfg = qpimg_config::get_map($one_map_id);
if ($one_map_cfg === false) {
return false;
}
if (isset($one_map_cfg['attach']) === true) {
if (is_array($one_map_cfg['attach']) === false) {
$one_map_cfg['attach'] = array($one_map_cfg['attach']);
}
foreach ($one_map_cfg['attach'] as $attach_map_id) {
if (isset($valid_maps_stack[$attach_map_id]) === false && isset($invalid_maps_stack[$attach_map_id]) === false) {
$need_get_maps_stack[] = $attach_map_id;
}
}
}
//---------------------------------------------------------------------
// Check for data in cache
if (qpimg_cache::validate($one_map_cfg) === true) {
$valid_maps_stack[$one_map_id] = $one_map_cfg;
} else {
if (qpimg_cache::clean($one_map_cfg) === false) {
return false;
}
$invalid_maps_stack[$one_map_id] = $one_map_cfg;
}
if ($map_id == $one_map_id) {
$map_cfg = $one_map_cfg;
}
}
if (count($invalid_maps_stack) > 0) {
if (isset($invalid_maps_stack[$map_id]) === false) {
$invalid_maps_stack[$map_id] = $valid_maps_stack[$map_id];
unset($valid_maps_stack[$map_id]);
}
//---------------------------------------------------------------------
// Generate data
foreach ($invalid_maps_stack as $one_map_id => $one_map_cfg) {
if (qpimg_media::pack($one_map_cfg) === false) {
return false;
}
$valid_maps_stack[$one_map_id] = $invalid_maps_stack[$one_map_id];
}
qpimg_cache::clean($one_map_cfg, true);
if (qpimg_media::pack_grouper_css($map_cfg, $valid_maps_stack) === false) {
return false;
}
//---------------------------------------------------------------------
}
return $get_link ? qpimg_cache::get_valid_css_source($map_cfg, isset($map_cfg['attach'])) : qpimg_cache::redirect($map_cfg);
}
