$OldString) {
$Key = $OldLine + $LineOffset;
if ($Key < 0) {
$Key = 0;
}
$Found = -1;
while ($Key < count($LineArrayNew)) {
if ($OldString != $LineArrayNew[$Key]) {
$Key++;
} elseif ($OldString == $LineArrayNew[$Key]) {
$Found = $Key;
break;
}
}
if ($Found == '-1') { //we never found the old line in the new array
$Result[] = '← '.$OldString.'
';
$LineOffset = $LineOffset - 1;
} elseif ($Found == $OldLine + $LineOffset) {
$Result[] = '↕ '.$OldString.'
';
} elseif ($Found != $OldLine + $LineOffset) {
if ($Found < $OldLine + $LineOffset) {
$Result[] = '⇤ '.$OldString.'
';
} else {
$Result[] = '← '.$OldString.'
';
$Key = $OldLine + $LineOffset;
while ($Key < $Found) {
$Result[] = '→ '.$LineArrayNew[$Key].'
';
$Key++;
}
$Result[] = '→ '.$OldString.'
';
}
$LineOffset = $Found - $OldLine;
}
}
if (count($LineArrayNew) > count($LineArrayOld) + $LineOffset) {
$Key = count($LineArrayOld) + $LineOffset;
while ($Key < count($LineArrayNew)) {
$Result[] = '→ '.$LineArrayNew[$Key].'
';
$Key++;
}
}
return $Result;
}
function get_body($ID, $Rev) {
global $DB, $Revision, $Body;
if ($Rev == $Revision) {
$Str = $Body;
} else {
$DB->query("
SELECT Body
FROM wiki_revisions
WHERE ID = '$ID'
AND Revision = '$Rev'");
if (!$DB->has_results()) {
error(404);
}
list($Str) = $DB->next_record();
}
return $Str;
}
if (!isset($_GET['old'])
|| !isset($_GET['new'])
|| !isset($_GET['id'])
|| !is_number($_GET['old'])
|| !is_number($_GET['new'])
|| !is_number($_GET['id'])
|| $_GET['old'] > $_GET['new']
) {
error(0);
}
$ArticleID = $_GET['id'];
$Article = $Alias->article($ArticleID);
list($Revision, $Title, $Body, $Read, $Edit, $Date, $AuthorID, $AuthorName) = array_shift($Article);
if ($Read > $LoggedUser['EffectiveClass']) {
error(404);
}
View::show_header('Compare Article Revisions');
$Diff2 = get_body($ArticleID, $_GET['new']);
$Diff1 = get_body($ArticleID, $_GET['old']);
?>