Imports name this capability’s declared dependencies, which fune builds next to it in your project; each one links to its page.
use super::funejson::Value; ← the fune runtime: the JSON value the test vectors use; fune build keeps it only where a signature takes one
/// Allowed or locked, by replaying the failures in time order: max_attempts
/// failures within window_seconds of the latest lock the account for
/// lockout_seconds from that failure, and the count starts again.
///
/// # Panics
/// Panics on a policy number below 1.
pub fn login_throttle(failures: &[i64], now: i64, policy: &ThrottlePolicy) -> ThrottleDecision {
if policy.max_attempts < 1 {
panic!("maxAttempts must be a whole number of at least 1");
}
if policy.window_seconds < 1 {
panic!("windowSeconds must be a whole number of at least 1");
}
if policy.lockout_seconds < 1 {
panic!("lockoutSeconds must be a whole number of at least 1");
}
let mut times: Vec<i64> = failures.iter().copied().filter(|&t| t <= now).collect();
times.sort_unstable();
let mut locked_until: Option<i64> = None;
let mut streak: Vec<i64> = Vec::new();
for t in times {
if let Some(until) = locked_until {
if t < until {
continue;
}
}
streak.retain(|&s| s > t - policy.window_seconds);
streak.push(t);
if streak.len() as i64 >= policy.max_attempts {
locked_until = Some(t + policy.lockout_seconds);
streak.clear();
}
}
if let Some(until) = locked_until {
if now < until {
return ThrottleDecision {
allowed: false,
retry_after_seconds: until - now,
remaining_attempts: 0,
locked_until: Some(until),
};
}
}
let live = streak.iter().filter(|&&s| s > now - policy.window_seconds).count() as i64;
ThrottleDecision {
allowed: true,
retry_after_seconds: 0,
remaining_attempts: policy.max_attempts - live,
locked_until: None,
}
}
pub fn throttle_decision_to_value(decision: &ThrottleDecision) -> Value {
Value::obj(vec![
("allowed", Value::Bool(decision.allowed)),
("retryAfterSeconds", Value::Int(decision.retry_after_seconds)),
("remainingAttempts", Value::Int(decision.remaining_attempts)),
("lockedUntil", decision.locked_until.map(Value::Int).unwrap_or(Value::Null)),
])
}
pub fn fune_vector(args: &[Value]) -> Value {
let failures: Vec<i64> = args[0]
.as_arr()
.iter()
.map(|v| match v {
Value::Int(i) => *i,
_ => panic!("failures must be whole Unix seconds"),
})
.collect();
let now = match &args[1] {
Value::Int(i) => *i,
_ => panic!("now must be a whole number of Unix seconds"),
};
let field = |key: &str| match args[2].get(key) {
Value::Int(i) => *i,
_ => panic!("{} must be a whole number of at least 1", key),
};
let policy = ThrottlePolicy {
max_attempts: field("maxAttempts"),
window_seconds: field("windowSeconds"),
lockout_seconds: field("lockoutSeconds"),
};
throttle_decision_to_value(&login_throttle(&failures, now, &policy))
}