mirror of
https://github.com/kennethreitz/replit-py.git
synced 2026-06-05 23:10:18 +00:00
Scoder12
112 lines
3.5 KiB
Python
112 lines
3.5 KiB
Python
"""Utitilities to make development easier."""
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from functools import wraps
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from typing import Any, Callable, Union
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import flask
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from .html import Page
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sign_in_snippet = (
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'<script authed="location.reload()" '
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'src="https://auth.turbio.repl.co/script.js"></script>'
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)
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def signin(title: str = "Please Sign In") -> Page:
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"""Return a sign-in page.
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Args:
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title (str): The title of the sign in page. Defaults to "Please Sign In".
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Returns:
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Page: The sign-in page.
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"""
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return Page(title=title, body=sign_in_snippet)
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def needs_signin(func: Callable = None, login_html: str = sign_in_snippet) -> Callable:
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"""A decorator that enforces that the user is signed in before accessing the page.
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Args:
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func (Callable): The function passed in if used as a decorator. Defaults to
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None.
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login_html (str): The HTML to show when the user needs to sign in. Defaults to
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sign_in_snippet.
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Returns:
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Callable: The new handler.
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"""
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def decorator(func: Callable) -> Callable:
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@wraps(func)
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def handler(*args: Any, **kwargs: Any) -> flask.Response:
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if flask.request.signed_in:
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return func(*args, **kwargs)
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else:
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return login_html
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return handler
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if func is not None: # called with no options @needs_signin
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return decorator(func)
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else: # called with options, eg @needs_signin(login_html='...')
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return decorator
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def needs_params(
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*param_names: str,
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src: Union[str, dict],
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onerror: Callable[[str], flask.Response] = None,
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) -> Callable:
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"""Require paramaters before a handler can be activated.
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Args:
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param_names (str): The paramaters that must be in the request.
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src (Union[str, dict]): The source to get the paramaters from. Can be "form"
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to use flask.request.form (POST requests), "query" for flask.request.query
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(GET requests), or a custom dictionary.
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onerror (Callable): A function to handle when a paramater is missing. It will
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be passed the parameter that is missing. If no function is specified a
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handler that returns a descriptive error and 400 Bad Request status code
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will be used.
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Raises:
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TypeError: No paramaters were provided or an invalid one was provided.
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Returns:
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Callable: The new handler.
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"""
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if len(param_names) < 1:
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raise TypeError("You must specify at least one required paramater name")
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# If function is used as a decorator with no arguments, the first argument will be
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# a function, so type check all of the param names to catch mistakes
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if not all(isinstance(p, str) for p in param_names):
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raise TypeError("All paramater names should be strings.")
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def default_onerror(missing_param: str) -> flask.Response:
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return flask.make_response(
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f"Parameter {missing_param!r} is required but is missing",
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400,
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mimetype="text/plain",
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)
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if src in ["form", "query"]:
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src = getattr(flask.request, src)
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onerror = default_onerror if onerror is None else onerror
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def decorator(func: Callable) -> Callable:
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@wraps(func)
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def handler(*args: Any, **ignoredkwargs: Any) -> flask.Response:
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param_kwargs = {}
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for p in param_names:
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if p not in src:
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return onerror(p)
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param_kwargs[p] = src[p]
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return func(*args, **param_kwargs)
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return handler
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return decorator
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