Cli/Command: add new JSON helpers

library/Director/Cli/Command.php

@@ -12,6 +12,50 @@ class Command extends CliCommand
 
     private $api;
 
+    protected function renderJson($object, $pretty = true)
+    {
+        if ($pretty && version_compare(PHP_VERSION, '5.4.0') >= 0) {
+            return json_encode($object, JSON_PRETTY_PRINT) . "\n";
+        } else {
+            return json_encode($object) . "\n";
+        }
+    }
+
+    protected function parseJson($json)
+    {
+        $res = json_decode($json);
+
+        if ($res === null) {
+            $this->fail(sprintf(
+                'Invalid JSON',
+                $this->getLastJsonError()
+            ));
+        }
+
+        return $res;
+    }
+
+    // TODO: just return json_last_error_msg() for PHP >= 5.5.0
+    protected function getLastJsonError()
+    {
+        switch (json_last_error()) {
+            case JSON_ERROR_DEPTH:
+                return 'The maximum stack depth has been exceeded';
+            case JSON_ERROR_CTRL_CHAR:
+                return 'Control character error, possibly incorrectly encoded';
+            case JSON_ERROR_STATE_MISMATCH:
+                return 'Invalid or malformed JSON';
+            case JSON_ERROR_SYNTAX:
+                return 'Syntax error';
+            case JSON_ERROR_UTF8:
+                return 'Malformed UTF-8 characters, possibly incorrectly encoded';
+            default:
+                return 'An error occured when parsing a JSON string';
+        }
+
+        return $this;
+    }
+
     protected function api($endpointName = null)
     {
         if ($this->api === null) {