cleaner code, changelog entries

CHANGELOG.md

@@ -1,5 +1,8 @@
 ## Unreleased
 
+** Breaking change: automatic digging of the value if the reponse body is an object with a single key
+** Breaking change: remove `Scalingo::API::Reponse` in favor of `Faraday::Response`
+
 ## 3.5.0 - 2023-12-28
 
 * Change: update Faraday to 2.x, released about two years ago. The public API of this gem doesn't change, therefore this is not a major release. However, if you manipulate directly faraday's objects, you may encounter breaking changes. Refer to [Faraday's website](https://lostisland.github.io/faraday/) for how to migrate.

lib/scalingo/faraday/extract_meta.rb

@@ -3,23 +3,29 @@
 module Scalingo
   class ExtractMeta < Faraday::Middleware
     def on_complete(env)
-      # Only hash-like objects are relevant
       return unless env.body.is_a?(Hash)
 
-      # Extract meta from response
-      if env.body[:meta]
-        env[:response_meta] = env.body.delete(:meta)
-      end
-
-      # Extract cursor-based pagination
-      if env.body.key?(:next_cursor)
-        env[:response_meta] = {
-          cursor_pagination: {
-            next_cursor: env.body.delete(:next_cursor),
-            has_more: env.body.delete(:has_more)
-          }.compact
-        }
-      end
+      extract_metadata(env)
+      extract_cursor_metadata(env)
+    end
+
+    private
+
+    def extract_metadata(env)
+      return unless env.body[:meta]
+
+      env[:response_meta] = env.body.delete(:meta)
+    end
+
+    def extract_cursor_metadata(env)
+      return unless env.body.key?(:next_cursor)
+
+      env[:response_meta] = {
+        cursor_pagination: {
+          next_cursor: env.body.delete(:next_cursor),
+          has_more: env.body.delete(:has_more)
+        }.compact
+      }
     end
   end
 end