[BUGS-5401] Look for status code in ssh-key:add response. (#2406)

* Look for status code in ssh-key:add response.

* Print a human friendly message for ed25519 ssh key.

* Fix coding standards.

src/Collections/SSHKeys.php

@@ -44,7 +44,7 @@ public function addKey($key_file)
                 'method' => 'post',
             ]
         );
-        return (array)$response['data'];
+        return $response;
     }
 
     /**

src/Commands/SSHKey/AddCommand.php

@@ -24,7 +24,22 @@ class AddCommand extends TerminusCommand
      */
     public function add($file)
     {
-        $this->session()->getUser()->getSSHKeys()->addKey($file);
+        $response = $this->session()->getUser()->getSSHKeys()->addKey($file);
+        if ($response['status_code'] !== 200) {
+            $this->log()->error($this->getMessageToLog($response['data']));
+            return;
+        }
         $this->log()->notice('Added SSH key from file {file}.', compact('file'));
     }
+
+    /**
+     * Get a (maybe) human friendly message to show to the user.
+     */
+    private function getMessageToLog($response_data)
+    {
+        if (trim($response_data) === "SSH validation failed: Unknown SSH key type 'ssh-ed25519'.") {
+            return "SSH keys of type 'ed25519' are not yet supported. Please use a different key type.";
+        }
+        return $response_data;
+    }
 }