/**
* Function to transform text that satisfies the class description.
* @param Text $text
* @return string
*/
public function transform(Text $text) : string
{
$chars = $text->getCharsByText();
$asciiChars = [];
foreach ($chars as $key => $char) {
$asciiChars[$key] = $this->uni_ord($char);
# Skip first char, has no predecessor
if ($key == 0) {
continue;
}
# Smaller then predecessor
if ($asciiChars[$key] < $asciiChars[$key - 1]) {
$nextAsciiChar = $this->uni_chr($asciiChars[$key] + 1);
$chars[$key] = $nextAsciiChar;
}
# Greater then predecessor
if ($asciiChars[$key] > $asciiChars[$key - 1]) {
$nextAsciiChar = $this->uni_chr($asciiChars[$key] + -1);
$chars[$key] = $nextAsciiChar;
}
}
$text->setChars($chars);
return $text->buildTextFromChars();
}
