refactor: move workflow package to dify_graph (#32844)

api/dify_graph/entities/pause_reason.py

@@ -0,0 +1,50 @@
+from collections.abc import Mapping
+from enum import StrEnum, auto
+from typing import Annotated, Any, Literal, TypeAlias
+
+from pydantic import BaseModel, Field
+
+from dify_graph.nodes.human_input.entities import FormInput, UserAction
+
+
+class PauseReasonType(StrEnum):
+    HUMAN_INPUT_REQUIRED = auto()
+    SCHEDULED_PAUSE = auto()
+
+
+class HumanInputRequired(BaseModel):
+    TYPE: Literal[PauseReasonType.HUMAN_INPUT_REQUIRED] = PauseReasonType.HUMAN_INPUT_REQUIRED
+    form_id: str
+    form_content: str
+    inputs: list[FormInput] = Field(default_factory=list)
+    actions: list[UserAction] = Field(default_factory=list)
+    display_in_ui: bool = False
+    node_id: str
+    node_title: str
+
+    # The `resolved_default_values` stores the resolved values of variable defaults. It's a mapping from
+    # `output_variable_name` to their resolved values.
+    #
+    # For example, The form contains a input with output variable name `name` and placeholder type `VARIABLE`, its
+    # selector is ["start", "name"]. While the HumanInputNode is executed, the correspond value of variable
+    # `start.name` in variable pool is `John`. Thus, the resolved value of the output variable `name` is `John`. The
+    # `resolved_default_values` is `{"name": "John"}`.
+    #
+    # Only form inputs with default value type `VARIABLE` will be resolved and stored in `resolved_default_values`.
+    resolved_default_values: Mapping[str, Any] = Field(default_factory=dict)
+
+    # The `form_token` is the token used to submit the form via UI surfaces. It corresponds to
+    # `HumanInputFormRecipient.access_token`.
+    #
+    # This field is `None` if webapp delivery is not set and not
+    # in orchestrating mode.
+    form_token: str | None = None
+
+
+class SchedulingPause(BaseModel):
+    TYPE: Literal[PauseReasonType.SCHEDULED_PAUSE] = PauseReasonType.SCHEDULED_PAUSE
+
+    message: str
+
+
+PauseReason: TypeAlias = Annotated[HumanInputRequired | SchedulingPause, Field(discriminator="TYPE")]