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new: Layout widget #84

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68 changes: 66 additions & 2 deletions aiogram_dialog/widgets/kbd/group.py
Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
from itertools import chain
from typing import List, Dict, Optional
from itertools import chain, islice, accumulate
from operator import itemgetter
from typing import List, Dict, Optional, Sequence, Union, Callable

from aiogram.types import InlineKeyboardButton, CallbackQuery

Expand All @@ -8,6 +9,14 @@
from .base import Keyboard
from ..when import WhenCondition

ItemsGetter = Callable[[Dict], Sequence]


def get_identity(items: Sequence) -> ItemsGetter:
def identity(data) -> Sequence:
return items
return identity


class Group(Keyboard):
def __init__(self, *buttons: Keyboard, id: Optional[str] = None, width: int = None,
Expand Down Expand Up @@ -57,6 +66,61 @@ async def process_callback(self, c: CallbackQuery, dialog: Dialog, manager: Dial
return False


class Layout(Keyboard):
def __init__(self,
*buttons: Keyboard,
id: Optional[str] = None,
layout: Union[str, Sequence] = None,
when: WhenCondition = None):
super().__init__(id, when)
self.buttons = buttons

if isinstance(layout, str):
self.layout_getter = itemgetter(layout)
elif layout is None:
self.layout_getter = lambda x: None
else:
self.layout_getter = get_identity(layout)

def find(self, widget_id):
widget = super(Layout, self).find(widget_id)
if widget:
return widget
for btn in self.buttons:
widget = btn.find(widget_id)
if widget:
return widget
return None

async def _render_keyboard(self, data: Dict, manager: DialogManager) -> List[List[InlineKeyboardButton]]:
kbd: List[List[InlineKeyboardButton]] = []
layout = self.layout_getter(data)

for b in self.buttons:
b_kbd = await b.render_keyboard(data, manager)
if layout is None or not kbd:
kbd += b_kbd
else:
kbd[0].extend(chain.from_iterable(b_kbd))

if layout and kbd:
kbd = list(self._wrap_kbd(kbd[0], layout))
return kbd

def _wrap_kbd(self, kbd: List[InlineKeyboardButton], layout: Sequence) -> List[List[InlineKeyboardButton]]:
_layout = list(accumulate(layout))

for start, end in zip([0, *_layout],
[*_layout, _layout[-1]]):
yield list(islice(kbd, start, end))
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async def process_callback(self, c: CallbackQuery, dialog: Dialog, manager: DialogManager) -> bool:
for b in self.buttons:
if await b.process_callback(c, dialog, manager):
return True
return False


class Row(Group):
def __init__(self, *buttons: Keyboard, id: Optional[str] = None, when: WhenCondition = None):
super().__init__(*buttons, id=id, width=9999, when=when) # telegram doe not allow even 100 columns
Expand Down