[refactor] Replacing nesting conditionals and calling once

process_counter

limitador/src/storage/in_memory.rs

@@ -132,20 +132,15 @@ impl CounterStorage for InMemoryStorage {
  }
  continue;
  }
- if let Some(limits) = limits_by_namespace.get(counter.limit().namespace()) {
- if let Some(counters) = limits.get(counter.limit()) {
- if let Some(expiring_value) = counters.get(&counter.into()) {
- let value = expiring_value.value();
- if let Some(Authorization::Limited(counter_limited)) =
- process_counter(counter, value, delta)
- {
- if !load_counters {
- return Ok(Authorization::Limited(counter_limited));
- }
- }
- }
- }
- } else if let Some(limited) = process_counter(counter, 0, delta) {
+
+ let value = Some(limits_by_namespace
+ .get(counter.limit().namespace())
+ .and_then(|limits| limits.get(counter.limit()))
+ .and_then(|counters| counters.get(&counter.into()))
+ .map(|expiring_value| expiring_value.value())
+ .unwrap_or(0));
+
+ if let Some(limited) = process_counter(counter, value.unwrap(), delta) {
  if !load_counters {
  return Ok(limited);
  }