feat/enhance the multi-modal support (#8818)

api/core/workflow/nodes/event/__init__.py

@@ -0,0 +1,10 @@
+from .event import ModelInvokeCompletedEvent, RunCompletedEvent, RunRetrieverResourceEvent, RunStreamChunkEvent
+from .types import NodeEvent
+
+__all__ = [
+    "RunCompletedEvent",
+    "RunRetrieverResourceEvent",
+    "RunStreamChunkEvent",
+    "NodeEvent",
+    "ModelInvokeCompletedEvent",
+]

api/core/workflow/nodes/event/event.py

@@ -0,0 +1,28 @@
+from pydantic import BaseModel, Field
+
+from core.model_runtime.entities.llm_entities import LLMUsage
+from core.workflow.entities.node_entities import NodeRunResult
+
+
+class RunCompletedEvent(BaseModel):
+    run_result: NodeRunResult = Field(..., description="run result")
+
+
+class RunStreamChunkEvent(BaseModel):
+    chunk_content: str = Field(..., description="chunk content")
+    from_variable_selector: list[str] = Field(..., description="from variable selector")
+
+
+class RunRetrieverResourceEvent(BaseModel):
+    retriever_resources: list[dict] = Field(..., description="retriever resources")
+    context: str = Field(..., description="context")
+
+
+class ModelInvokeCompletedEvent(BaseModel):
+    """
+    Model invoke completed
+    """
+
+    text: str
+    usage: LLMUsage
+    finish_reason: str | None = None

api/core/workflow/nodes/event/types.py

@@ -0,0 +1,3 @@
+from .event import ModelInvokeCompletedEvent, RunCompletedEvent, RunRetrieverResourceEvent, RunStreamChunkEvent
+
+NodeEvent = RunCompletedEvent | RunStreamChunkEvent | RunRetrieverResourceEvent | ModelInvokeCompletedEvent