private function getChanges($previousSnapshot, $newSnapshot)
{
$changes = Diff::compare($previousSnapshot->readNoTags(), $newSnapshot->readNoTags());
$hasText = false;
foreach ($changes as $key => $change) {
if ($change[1] === Diff::UNMODIFIED) {
unset($changes[$key]);
} else {
$hasText = !empty($change[0]) ? true : $hasText;
}
}
return $hasText && !empty($changes) ? $changes : NULL;
}
private function diff($x, $y)
{
$html = "<style>\n \t\t.diffInserted{\n \t\t\tborder: 1px solid rgb(192,255,192);\n \t\t\tbackground: rgb(224,255,224);\n \t\t}\n \t\t.diffDeleted{\n \t\t\tborder: 1px solid rgb(255,192,192);\n \t\t\tbackground: rgb(255,224,224);\n \t\t}\n \t</style>";
return $html . Diff::toTable(Diff::compare($x, $y));
}