variable assigner node

api/core/workflow/nodes/variable_assigner/variable_assigner_node.py

@@ -1,14 +1,33 @@
 from typing import cast
 
 from core.workflow.entities.base_node_data_entities import BaseNodeData
-from core.workflow.entities.node_entities import NodeRunResult
+from core.workflow.entities.node_entities import NodeRunResult, NodeType
 from core.workflow.entities.variable_pool import VariablePool
 from core.workflow.nodes.base_node import BaseNode
+from core.workflow.nodes.variable_assigner.entities import VariableAssignerNodeData
+from models.workflow import WorkflowNodeExecutionStatus
 
 
 class VariableAssignerNode(BaseNode):
+    _node_data_cls = VariableAssignerNodeData
+    _node_type = NodeType.VARIABLE_ASSIGNER
+
     def _run(self, variable_pool: VariablePool) -> NodeRunResult:
-        pass
+        node_data: VariableAssignerNodeData = cast(self._node_data_cls, self.node_data)
+        value = variable_pool.get_variable_value(node_data.variables)
+        variable_pool.append_variable(
+            node_id=self.node_id,
+            variable_key_list=node_data.variables,
+            value=value
+        )
+        outputs = {
+            "output": value
+        }
+
+        return NodeRunResult(
+            status=WorkflowNodeExecutionStatus.SUCCEEDED,
+            outputs=outputs,
+        )
 
     @classmethod
     def _extract_variable_selector_to_variable_mapping(cls, node_data: BaseNodeData) -> dict[str, list[str]]: