feat: Implement AtRateLimiter spec changes

packages/at_server_spec/CHANGELOG.md

@@ -1,3 +1,6 @@
+## 3.0.15
+- feat: Introduce AtRateLimiter to limit the requests based on the criteria defined
+- fix: Modify InboundConnection to implement AtRateLimiter to limit requests
 ## 3.0.14
 - fix: Rename TOTP to OTP
 ## 3.0.13

packages/at_server_spec/lib/src/at_rate_limiter/at_rate_limiter.dart

@@ -0,0 +1,18 @@
+/// A rate limiter class that allows controlling the rate of requests within a specified time frame.
+///
+/// This class provides a way to limit the number of requests that can be made
+/// within a specified time frame. It keeps track of the timestamps of previous
+/// requests and allows requests to be made only if they do not exceed the
+/// maximum allowed requests per time frame.
+abstract class AtRateLimiter {
+  /// The maximum number of requests allowed within the specified time frame.
+  late int maxRequestsPerTimeFrame;
+
+  /// The duration of the time frame within which requests are limited.
+  late int timeFrameInMillis;
+
+  /// Checks whether a new request is allowed based on the rate limiting rules.
+  ///
+  /// Returns `true` if the request is allowed, or `false` if it exceeds the rate limit.
+  bool isRequestAllowed();
+}

packages/at_server_spec/lib/src/connection/inbound_connection.dart

@@ -1,7 +1,8 @@
 import 'dart:io';
+import 'package:at_server_spec/src/at_rate_limiter/at_rate_limiter.dart';
 import 'package:at_server_spec/src/connection/at_connection.dart';
 
-abstract class InboundConnection extends AtConnection {
+abstract class InboundConnection extends AtConnection implements AtRateLimiter {
   ///Returns true if remote socket and remote port of this and connection matches
   bool equals(InboundConnection connection);
 

packages/at_server_spec/pubspec.yaml

@@ -1,6 +1,6 @@
 name: at_server_spec
 description: A Dart library containing abstract classes that defines what implementations of the root and secondary servers are responsible for.
-version: 3.0.14
+version: 3.0.15
 repository: https://github.com/atsign-foundation/at_server
 homepage: https://docs.atsign.com
 documentation: https://docs.atsign.com/atplatform/secondaryserver
@@ -10,7 +10,7 @@ environment:
 
 dependencies:
   meta: ^1.8.0
-  at_commons: ^3.0.54
+  at_commons: ^3.0.55
 
 dev_dependencies:
   lints: ^1.0.1