From 1cc3151cc2499fa28f6738dccdd1de1d5d4445a4 Mon Sep 17 00:00:00 2001
From: Larry Garfield <larry@garfieldtech.com>
Date: Fri, 2 Aug 2024 09:07:11 -0500
Subject: [PATCH] Escape strings in JSON stream formatter.

---
 src/Formatter/JsonStreamFormatter.php | 9 +++++++++
 tests/JsonStreamFormatterTest.php     | 6 ++++++
 2 files changed, 15 insertions(+)

diff --git a/src/Formatter/JsonStreamFormatter.php b/src/Formatter/JsonStreamFormatter.php
index 872d523..1fd09c0 100644
--- a/src/Formatter/JsonStreamFormatter.php
+++ b/src/Formatter/JsonStreamFormatter.php
@@ -22,6 +22,15 @@ public function format(): string
         return 'json-stream';
     }
 
+    /**
+     * @param FormatterStream $runningValue
+     */
+    public function serializeString(mixed $runningValue, Field $field, ?string $next): mixed
+    {
+        $runningValue->printf('"%s"', is_string($next) ? str_replace('"', '\"', $next) : null);
+        return $runningValue;
+    }
+
     /**
      * @param FormatterStream $runningValue
      */
diff --git a/tests/JsonStreamFormatterTest.php b/tests/JsonStreamFormatterTest.php
index 9d688ec..b07cdf5 100644
--- a/tests/JsonStreamFormatterTest.php
+++ b/tests/JsonStreamFormatterTest.php
@@ -154,6 +154,12 @@ public static function streamExamples(): iterable
             )
         ];
 
+        yield AllFieldTypes::class . ' with JSON-type characters' => [
+            'data' => new AllFieldTypes(
+                string: '{ "with quotes", and { characters ".',
+            )
+        ];
+
         yield NullArrays::class => [
             'data' => new NullArrays(),
         ];