/**
* Formats a JSON string into a pretty JSON string.
*
* @todo Fix so text-qualified characters eg. ",{[" don't break formatting.
*
* @param string $json
* @return string
*/
public static function format($json)
{
$indent_character = ' ';
$indent_count = 0;
$json_length = strlen($json);
$position = 0;
$insert_newline_after = function ($offset) use(&$json, &$indent_character, &$indent_count, &$position) {
$indent = str_repeat($indent_character, $indent_count);
$json = \Altumo\String\String::insert("\n" . $indent, $json, $offset + 1);
$position += strlen($indent) + 1;
};
for (; $position < $json_length; $position++) {
$character = $json[$position];
switch ($character) {
case ':':
//insert a space after colons
$json = \Altumo\String\String::insert(" ", $json, $position + 1);
$position++;
break;
case ',':
$insert_newline_after($position);
break;
case '[':
case '{':
$indent_count++;
$insert_newline_after($position);
break;
case ']':
case '}':
$indent_count--;
$insert_newline_after($position - 1);
break;
default:
}
$json_length = strlen($json);
}
return $json;
}
