/** array_compare_special
*
* If any elements of $before and $after are different, return the
* element from $after, or null if the element is only in $before.
* Compares arbitrarily nested arrays, but if the $levels parameter
* is given, only returns whole elements (or null) from $after after
* comparing that many levels of keys.
*/
function array_compare_special($before, $after, $levels = null)
{
$new_levels = $levels;
if ($new_levels !== null) {
$new_levels--;
}
$diff = false;
// check all keys in $before (to find changed and deleted items)
foreach ($before as $key => $value) {
if (!array_key_exists($key, $after)) {
// $key is no longer a key
$diff[$key] = null;
} else {
if (is_array($value)) {
// found an array
if (is_array($after[$key])) {
// still an array; compare recursively
if ($new_levels === null || $new_levels > 0) {
// still need to compare more keys
$new = array_compare_special($value, $after[$key], $new_levels);
if ($new !== false) {
$diff[$key] = $new;
}
} else {
if (!compare_recursive($value, $after[$key])) {
// return the whole array from $after
$diff[$key] = $after[$key];
}
}
} else {
// the value for $key in $after is no longer an array
$diff[$key] = $after[$key];
}
} else {
if ($after[$key] !== $value) {
// the value for $key changed
$diff[$key] = $after[$key];
}
}
}
}
// check all keys in $after (to find new items)
foreach ($after as $key => $value) {
if (!array_key_exists($key, $before)) {
// $key is a new key
$diff[$key] = $value;
}
}
return $diff;
}
//
// rtGui is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
// You should have received a copy of the GNU General Public License
// along with rtGui. If not, see <http://www.gnu.org/licenses/>.
require_once 'config.php';
require_once 'functions.php';
rtgui_session_start();
$data = get_all_torrents(array('for_html' => true));
if (@is_array($_SESSION['last_data'])) {
$last_data = $_SESSION['last_data'];
$diff_torrents = array_compare_special($last_data['torrents'], $data['torrents'], 2);
$diff_global = array_compare_special($last_data['global'], $data['global']);
$return = array();
if ($diff_torrents !== false) {
$return['torrents'] = $diff_torrents;
}
if ($diff_global !== false) {
$return['global'] = $diff_global;
}
if (!count($return)) {
$return = false;
}
echo json_encode($return);
} else {
echo json_encode($data);
}
$_SESSION['last_data'] = $data;
