function diffsparsejson($old, $new)
{
$diff = diff(diffstringsplit($old), diffstringsplit($new));
$adj = 0;
$out = array();
foreach ($diff as $k => $v) {
if (is_array($v)) {
if (empty($v['d']) && empty($v['i'])) {
$adj += 1;
continue;
} else {
if (empty($v['d'])) {
//insert
$out[] = array(0, $k - $adj, $v['i']);
$adj += 1;
} else {
if (empty($v['i'])) {
//delete
$out[] = array(1, $k - $adj, count($v['d']));
$adj -= count($v['d']) - 1;
} else {
//replace
$out[] = array(2, $k - $adj, count($v['d']), $v['i']);
$adj -= count($v['d']) - 1;
}
}
}
}
}
if (count($out) == 0) {
return '';
} else {
if (function_exists('json_encode')) {
return json_encode($out);
} else {
require_once "JSON.php";
$jsonser = new Services_JSON();
return $jsonser->encode($out);
}
}
}
exit;
} else {
$curBreadcrumb .= " > <a href=\"viewwiki.php?cid={$cid}&id={$id}&grp={$groupid}{$framed}\">View Wiki</a>";
$curBreadcrumb .= " > Clear WikiPage History\n";
$pagetitle = "Confirm History Delete";
}
} else {
if (isset($_GET['revert']) && isset($teacherid)) {
if ($_GET['revert'] == 'true') {
$revision = intval($_GET['torev']);
$query = "SELECT revision FROM imas_wiki_revisions WHERE wikiid='{$id}' AND stugroupid='{$groupid}' ";
$query .= "AND id>={$revision} ORDER BY id DESC";
$result = mysql_query($query) or die("Query failed : " . mysql_error());
if (mysql_num_rows($result) > 1 && $revision > 0) {
$row = mysql_fetch_row($result);
$base = diffstringsplit($row[0]);
while ($row = mysql_fetch_row($result)) {
//apply diffs
$base = diffapplydiff($base, $row[0]);
}
$newbase = addslashes(implode(' ', $base));
$query = "UPDATE imas_wiki_revisions SET revision='{$newbase}' WHERE id={$revision}";
mysql_query($query) or die("Query failed : " . mysql_error());
$query = "DELETE FROM imas_wiki_revisions WHERE wikiid='{$id}' AND stugroupid='{$groupid}' AND id>{$revision}";
mysql_query($query) or die("Query failed : " . mysql_error());
}
header('Location: ' . $urlmode . $_SERVER['HTTP_HOST'] . rtrim(dirname($_SERVER['PHP_SELF']), '/\\') . "/viewwiki.php?cid={$cid}&id={$id}{$framed}");
exit;
} else {
$curBreadcrumb .= " > <a href=\"viewwiki.php?cid={$cid}&id={$id}&grp={$groupid}{$framed}\">View Wiki</a>";
$curBreadcrumb .= " > Revert Wiki\n";
//$users = '{';
$users = array();
foreach ($keys as $uid) {
//if ($i>0) { $users .= ',';}
//$users .= $uid.':"'.str_replace(array('\\','"',), array('\\\\','\"'), $revisionusers[$uid]).'"';
$users[$uid] = $revisionusers[$uid];
$i++;
}
//$users .= '}';
} else {
$users = array();
//'{}';
$revisionhistory = array();
//'[]';
}
$text = diffstringsplit($text);
foreach ($text as $k => $v) {
$text[$k] = filter($v);
//str_replace(array("\n","\r",'"'),array('','','\\"'),filter($v));
}
//$original = '["'.implode('","',$text).'"]';
}
}
}
if ($overwriteBody == 1) {
echo $body;
} else {
// general JSON
$out = array('o' => $text, 'h' => $revisionhistory, 'u' => $users);
if (function_exists('json_encode')) {
echo json_encode($out);
