Add SharedState component for state sharing

src/backend/langflow/components/utilities/SharedState.py

@@ -0,0 +1,38 @@
+from typing import Union
+
+from langflow import CustomComponent
+from langflow.field_typing import Text
+from langflow.schema import Record
+
+
+class SharedState(CustomComponent):
+    display_name = "Shared State"
+    description = "A component to share state between components."
+
+    def build_config(self):
+        return {
+            "name": {"display_name": "Name", "info": "The name of the state."},
+            "record": {"display_name": "Record", "info": "The record to store."},
+            "append": {
+                "display_name": "Append",
+                "info": "If True, the record will be appended to the state.",
+            },
+        }
+
+    def build(
+        self, name: str, record: Union[Text, Record], append: bool = False
+    ) -> Record:
+        if append:
+            self.append_state(name, record)
+        else:
+            self.update_state(name, record)
+
+        state = self.get_state(name)
+        if not isinstance(state, Record):
+            if isinstance(state, str):
+                state = Record(text=state)
+            elif isinstance(state, dict):
+                state = Record(data=state)
+            else:
+                state = Record(text=str(state))
+        return state