♻️ Export bot-engine code into its own package

packages/bot-engine/variables/updateVariablesInSession.ts

@@ -0,0 +1,45 @@
+import { safeStringify } from '@typebot.io/lib/safeStringify'
+import {
+  SessionState,
+  VariableWithUnknowValue,
+  Variable,
+} from '@typebot.io/schemas'
+
+export const updateVariablesInSession =
+  (state: SessionState) =>
+  (newVariables: VariableWithUnknowValue[]): SessionState => ({
+    ...state,
+    typebotsQueue: state.typebotsQueue.map((typebotInQueue, index) =>
+      index === 0
+        ? {
+            ...typebotInQueue,
+            typebot: {
+              ...typebotInQueue.typebot,
+              variables: updateTypebotVariables(typebotInQueue.typebot)(
+                newVariables
+              ),
+            },
+          }
+        : typebotInQueue
+    ),
+  })
+
+const updateTypebotVariables =
+  (typebot: { variables: Variable[] }) =>
+  (newVariables: VariableWithUnknowValue[]): Variable[] => {
+    const serializedNewVariables = newVariables.map((variable) => ({
+      ...variable,
+      value: Array.isArray(variable.value)
+        ? variable.value.map(safeStringify)
+        : safeStringify(variable.value),
+    }))
+
+    return [
+      ...typebot.variables.filter((existingVariable) =>
+        serializedNewVariables.every(
+          (newVariable) => existingVariable.id !== newVariable.id
+        )
+      ),
+      ...serializedNewVariables,
+    ]
+  }