⚡ (setVariable) Add client-side set variable execution

Closes #461

packages/embeds/js/src/features/blocks/logic/setVariable/executeSetVariable.ts

@@ -0,0 +1,33 @@
+import { isNotDefined } from '@typebot.io/lib'
+import type { ScriptToExecute } from '@typebot.io/schemas'
+
+export const executeSetVariable = async ({
+  content,
+  args,
+}: ScriptToExecute): Promise<{ replyToSend: string | undefined }> => {
+  try {
+    const func = Function(
+      ...args.map((arg) => arg.id),
+      content.includes('return ') ? content : `return ${content}`
+    )
+    const replyToSend = await func(...args.map((arg) => arg.value))
+    return {
+      replyToSend: safeStringify(replyToSend),
+    }
+  } catch (err) {
+    return {
+      replyToSend: safeStringify(content),
+    }
+  }
+}
+
+export const safeStringify = (val: unknown): string | undefined => {
+  if (isNotDefined(val)) return
+  if (typeof val === 'string') return val
+  try {
+    return JSON.stringify(val)
+  } catch {
+    console.warn('Failed to safely stringify variable value', val)
+    return
+  }
+}