refactor: move workflow package to dify_graph (#32844)

api/dify_graph/utils/condition/entities.py

@@ -0,0 +1,49 @@
+from collections.abc import Sequence
+from typing import Literal
+
+from pydantic import BaseModel, Field
+
+SupportedComparisonOperator = Literal[
+    # for string or array
+    "contains",
+    "not contains",
+    "start with",
+    "end with",
+    "is",
+    "is not",
+    "empty",
+    "not empty",
+    "in",
+    "not in",
+    "all of",
+    # for number
+    "=",
+    "≠",
+    ">",
+    "<",
+    "≥",
+    "≤",
+    "null",
+    "not null",
+    # for file
+    "exists",
+    "not exists",
+]
+
+
+class SubCondition(BaseModel):
+    key: str
+    comparison_operator: SupportedComparisonOperator
+    value: str | Sequence[str] | None = None
+
+
+class SubVariableCondition(BaseModel):
+    logical_operator: Literal["and", "or"]
+    conditions: list[SubCondition] = Field(default_factory=list)
+
+
+class Condition(BaseModel):
+    variable_selector: list[str]
+    comparison_operator: SupportedComparisonOperator
+    value: str | Sequence[str] | bool | None = None
+    sub_variable_condition: SubVariableCondition | None = None