From 6e29256ee914ecf9984547d3551cd7a5e8084834 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Andreas=20Kr=C3=BChlmann?= <andreas@kruhlmann.dev>
Date: Thu, 8 Jan 2026 13:32:30 +0100
Subject: [PATCH] Update placeholder and validation

---
 .../resources/static/js/broadcastRuntime.js   |  0
 .../resources/static/js/broadcastWorkers.js   |  2 +
 src/main/resources/static/js/customAssets.js  | 40 ++++++++++++++++---
 src/main/resources/templates/admin.html       |  2 +-
 4 files changed, 38 insertions(+), 6 deletions(-)
 create mode 100644 src/main/resources/static/js/broadcastRuntime.js
 create mode 100644 src/main/resources/static/js/broadcastWorkers.js

diff --git a/src/main/resources/static/js/broadcastRuntime.js b/src/main/resources/static/js/broadcastRuntime.js
new file mode 100644
index 0000000..e69de29
diff --git a/src/main/resources/static/js/broadcastWorkers.js b/src/main/resources/static/js/broadcastWorkers.js
new file mode 100644
index 0000000..0b915f3
--- /dev/null
+++ b/src/main/resources/static/js/broadcastWorkers.js
@@ -0,0 +1,2 @@
+function spawnUserJavaScriptWorker(jsSource, data) {
+}
diff --git a/src/main/resources/static/js/customAssets.js b/src/main/resources/static/js/customAssets.js
index 45d52e2..3b70d9d 100644
--- a/src/main/resources/static/js/customAssets.js
+++ b/src/main/resources/static/js/customAssets.js
@@ -43,12 +43,42 @@ function getUserJavaScriptSourceError(src) {
         return { title: "Syntax Error", details: e.message };
     }
 
-    const functionNames = ast.body.filter((node) => node.type === "FunctionDeclaration").map((node) => node.id.name);
-    if (!functionNames.includes("init")) {
-        return { title: "Missing function: init", details: "Your code must include a function named 'init'." };
+    let hasInit = false;
+    let hasTick = false;
+
+    for (const node of ast.body) {
+        if (node.type !== "ExpressionStatement") continue;
+
+        const expr = node.expression;
+        if (expr.type !== "AssignmentExpression") continue;
+
+        const left = expr.left;
+        const right = expr.right;
+
+        if (
+            left.type === "MemberExpression" &&
+            left.object.type === "Identifier" &&
+            left.object.name === "exports" &&
+            left.property.type === "Identifier" &&
+            (right.type === "FunctionExpression" || right.type === "ArrowFunctionExpression")
+        ) {
+            if (left.property.name === "init") hasInit = true;
+            if (left.property.name === "tick") hasTick = true;
+        }
     }
-    if (!functionNames.includes("tick")) {
-        return { title: "Missing function: tick", details: "Your code must include a function named 'tick'." };
+
+    if (!hasInit) {
+        return {
+            title: "Missing function: init",
+            details: "You must assign a function to exports.init",
+        };
+    }
+
+    if (!hasTick) {
+        return {
+            title: "Missing function: tick",
+            details: "You must assign a function to exports.tick",
+        };
     }
 
     return undefined;
diff --git a/src/main/resources/templates/admin.html b/src/main/resources/templates/admin.html
index 4bc8ba5..a10757a 100644
--- a/src/main/resources/templates/admin.html
+++ b/src/main/resources/templates/admin.html
@@ -392,7 +392,7 @@
                         <textarea
                             class="text-input"
                             id="custom-asset-code"
-                            placeholder="function init({ surface, assets, channel }) {&#10;&#10;}&#10;&#10;function tick() {&#10;&#10;}"
+                            placeholder="exports.init = ({ surface, assets, channel }) => {&#10;&#10;};&#10;&#10;exports.tick = () => {&#10;&#10;};"
                             rows="25"
                             required
                         ></textarea>