getPasswordStrength static method
Implementation
static double getPasswordStrength(String password) {
if (password.isEmpty) return 0;
double pFraction;
if (RegExp(r'^[0-9]*$').hasMatch(password)) {
pFraction = 0.8;
} else if (RegExp(r'^[a-zA-Z0-9]*$').hasMatch(password)) {
pFraction = 1.5;
} else if (RegExp(r'^[a-z]*$').hasMatch(password)) {
pFraction = 1.0;
} else if (RegExp(r'^[a-zA-Z]*$').hasMatch(password)) {
pFraction = 1.3;
} else if (RegExp(r'^[a-z\-_!?]*$').hasMatch(password)) {
pFraction = 1.3;
} else if (RegExp(r'^[a-z0-9]*$').hasMatch(password)) {
pFraction = 1.2;
} else {
pFraction = 1.8;
}
logF(double x) => 1.0 / (1.0 + exp(-x));
logC(double x) => logF((x / 2.0) - 4.0);
return logC(password.length * pFraction);
}