/**
* Validates the IC's environment. The position of the sign is given. Return a string in order to
* state an error message and deny creation, otherwise return null to allow.
*
* @param sign
* @return
*/
@Override
public String validateEnvironment(CraftBookWorld cbworld, Vector pos, SignText sign) {
String id = sign.getLine3().toLowerCase();
if (id.length() != 0) {
if (id.length() < 3 || id.charAt(1) != ':' || (id.charAt(0) != 'g' && id.charAt(0) != 'p')) {
return "Invalid player or group name on Third line.";
}
}
if (sign.getLine4().isEmpty()) {
sign.setLine4("1");
} else {
try {
int damage = Integer.parseInt(sign.getLine4());
if (damage > 20 || damage < 1) return "4th line damage value must be a number from 1 to 20";
} catch (NumberFormatException e) {
return "4th line must be a number.";
}
}
return null;
}
