From 607d42f97db21ec06278abeb3164019b2e3b9411 Mon Sep 17 00:00:00 2001
From: Charley DAVID <hello@calyh.re>
Date: Thu, 22 Oct 2020 18:02:38 +0200
Subject: [PATCH] feat(presence): Support for arbitrary data

---
 lib/json1.ts     | 6 +++---
 test/presence.js | 9 +++++++++
 2 files changed, 12 insertions(+), 3 deletions(-)

diff --git a/lib/json1.ts b/lib/json1.ts
index 204430b..733ea9e 100644
--- a/lib/json1.ts
+++ b/lib/json1.ts
@@ -735,11 +735,11 @@ function transformPresence(presence: Presence | null, op: JSONOp, isOwnOperation
     const end = transformPosition(presence.end, op)
 
     if (start && end) {
-        return { start, end }
+        return { ...presence, start, end }
     } else if (start) {
-        return { start, end: start }
+        return { ...presence, start, end: start }
     } else if (end) {
-        return { start: end, end }
+        return { ...presence, start: end, end }
     }
 
     return null
diff --git a/test/presence.js b/test/presence.js
index 3949ea8..e74e54b 100644
--- a/test/presence.js
+++ b/test/presence.js
@@ -83,4 +83,13 @@ describe("presences", () => {
       presenceAfter
     );
   });
+
+  it("allows arbitrary data in presences", () => {
+    const op = ["z", 0, { i: "hello" }];
+    const data = { user: "John Doe", color: "blue" };
+    const presenceBefore = { start: ["z", 0], end: ["z", 1], data };
+    const presenceAfter = type.transformPresence(presenceBefore, op);
+
+    assert.ok(presenceBefore.data === presenceAfter.data);
+  });
 });