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| 1 | +# Copyright © 2023 Innovatie Ltd. All rights reserved. |
| 2 | +""" |
| 3 | +Jinja support. |
| 4 | +""" |
| 5 | +import typing as t |
| 6 | + |
| 7 | +from jinja2 import pass_context |
| 8 | +from jinja2.ext import Extension |
| 9 | +from jinja2.runtime import Context, Undefined |
| 10 | + |
| 11 | + |
| 12 | +class ReactPyExtension(Extension): |
| 13 | + """ |
| 14 | + Jinja has more expressive power than core Django's templates, and can |
| 15 | + directly handle expansions such as: |
| 16 | +
|
| 17 | + {{ component(*args, **kwargs) }} |
| 18 | + """ |
| 19 | + # |
| 20 | + # Therefore, there is no new tag to parse(). |
| 21 | + # |
| 22 | + tags = {} |
| 23 | + |
| 24 | + def __init__(self, environment): |
| 25 | + super().__init__(environment) |
| 26 | + # |
| 27 | + # All we need is to add global "component" to the environment. |
| 28 | + # |
| 29 | + environment.globals["component"] = self._component |
| 30 | + |
| 31 | + @pass_context |
| 32 | + def _component(self, __context: Context, implementation: str, *args: t.Any, |
| 33 | + **kwargs: t.Any) -> t.Union[t.Any, Undefined]: |
| 34 | + """ |
| 35 | + This method is used to embed an existing ReactPy component into your |
| 36 | + Jinja2 template. |
| 37 | +
|
| 38 | + Args: |
| 39 | + implementation: String of the fully qualified name of a component. |
| 40 | + *args: The component's positional arguments. |
| 41 | + **kwargs: The component's keyword arguments. |
| 42 | +
|
| 43 | + Returns: |
| 44 | + Whatever the components returns. |
| 45 | + """ |
| 46 | + module, name = implementation.rsplit('.', 1) |
| 47 | + component = getattr(__import__(module, None, None, [name]), name) |
| 48 | + template_args = component(*args, **kwargs).render() |
| 49 | + # |
| 50 | + # TODO: template_args looks like this: |
| 51 | + # |
| 52 | + # {'tagName': 'h1', 'children': ['Hello World!']} |
| 53 | + # |
| 54 | + # and need to be run through the Django template in |
| 55 | + # templates/reactpy/component.html, or equivalent. |
| 56 | + # |
| 57 | + return template_args |
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