Merge pull request #10 from daizutabi/9-add-context-method

Add context method

src/textconf/config.py

@@ -22,6 +22,11 @@
 class Renderable(ABC):
     """Represent a renderable class."""
 
+    @classmethod
+    def context(cls, cfg: Self) -> dict[str, Any]:  # noqa: ARG003
+        """Get the context for rendering."""
+        return {}
+
     @classmethod
     @abstractmethod
     def render(cls, cfg: Self, *args, **kwargs) -> str:
@@ -67,7 +72,8 @@ def render(cls, cfg: Self, *args: dict[str, Any] | list[str], **kwargs) -> str:
                 in any of the searched directories.
 
         """
-        params = kwargs.copy()
+        params = cls.context(cfg)
+        params.update(kwargs)
 
         for name, obj in iter_template_methods(cls):
             if name not in params:

tests/test_config.py

@@ -94,3 +94,27 @@ def test_render_endswith_raises():
     cfg = Config(x=5)
     with pytest.raises(AssertionError):
         assert_render_endswith(cfg, "|Zzz")
+
+
+@dataclass
+class Context(BaseConfig):
+    _template_: str = "template.jinja"
+    x: int = 0
+
+    @classmethod
+    def context(cls, cfg: Self) -> dict[str, int | str]:
+        y = cls.y(cfg)
+        return {"y": y, "z": cls.z(cfg, y)}
+
+    @classmethod
+    def y(cls, cfg: Self) -> int:
+        return 2 * cfg.x
+
+    @classmethod
+    def z(cls, cfg: Self, y: int) -> str:
+        return "z" * (cfg.x + y)
+
+
+def test_context():
+    cfg = Context(x=2)
+    assert_render_eq(cfg, "X2|Y4|Zzzzzzz")