♻️ Export bot-engine code into its own package

packages/bot-engine/startBotFlow.ts

@@ -0,0 +1,27 @@
+import { TRPCError } from '@trpc/server'
+import { ChatReply, SessionState } from '@typebot.io/schemas'
+import { executeGroup } from './executeGroup'
+import { getNextGroup } from './getNextGroup'
+
+export const startBotFlow = async (
+  state: SessionState,
+  startGroupId?: string
+): Promise<ChatReply & { newSessionState: SessionState }> => {
+  if (startGroupId) {
+    const group = state.typebotsQueue[0].typebot.groups.find(
+      (group) => group.id === startGroupId
+    )
+    if (!group)
+      throw new TRPCError({
+        code: 'BAD_REQUEST',
+        message: "startGroupId doesn't exist",
+      })
+    return executeGroup(state)(group)
+  }
+  const firstEdgeId =
+    state.typebotsQueue[0].typebot.groups[0].blocks[0].outgoingEdgeId
+  if (!firstEdgeId) return { messages: [], newSessionState: state }
+  const nextGroup = await getNextGroup(state)(firstEdgeId)
+  if (!nextGroup.group) return { messages: [], newSessionState: state }
+  return executeGroup(state)(nextGroup.group)
+}