feat: rate limit management

src/main/java/br/com/jpdev01/asaassdk/http/Response.java

@@ -1,10 +1,14 @@
 package br.com.jpdev01.asaassdk.http;
 
+import br.com.jpdev01.asaassdk.http.ratelimit.RateLimitData;
 import org.apache.http.Header;
+import org.apache.http.NameValuePair;
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
 import java.io.UnsupportedEncodingException;
+import java.util.Arrays;
+import java.util.Optional;
 import java.util.Scanner;
 
 public class Response {
@@ -116,4 +120,27 @@ public int getStatusCode() {
     public Header[] getHeaders() {
         return headers;
     }
+
+    public RateLimitData getRateLimit() {
+        String limit = findHeaderValue("RateLimit-Limit");
+        if (limit != null) {
+            String remaining = findHeaderValue("RateLimit-Remaining");
+            String reset = findHeaderValue("RateLimit-Reset");
+
+            return new RateLimitData(
+                    Integer.parseInt(limit),
+                    Integer.parseInt(remaining),
+                    Integer.parseInt(reset)
+            );
+        }
+
+        return null;
+    }
+
+    private String findHeaderValue(String key) {
+        Optional<Header> headerEncontrado = Arrays.stream(headers)
+                .filter(header -> header.getName().equals(key))
+                .findFirst();
+        return headerEncontrado.map(NameValuePair::getValue).orElse(null);
+    }
 }

src/main/java/br/com/jpdev01/asaassdk/http/ratelimit/RateLimitData.java

@@ -0,0 +1,26 @@
+package br.com.jpdev01.asaassdk.http.ratelimit;
+
+public class RateLimitData {
+
+    private final int limit;
+    private final int remaining;
+    private final int reset;
+
+    public RateLimitData(int limit, int remaining, int reset) {
+        this.limit = limit;
+        this.remaining = remaining;
+        this.reset = reset;
+    }
+
+    public int getLimit() {
+        return limit;
+    }
+
+    public int getRemaining() {
+        return remaining;
+    }
+
+    public int getReset() {
+        return reset;
+    }
+}