advanced usage of callbackdata was added

examples/callback_data_examples/advanced_calendar_example/filters.py

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+import telebot
+from telebot import types, AdvancedCustomFilter
+from telebot.callback_data import CallbackData, CallbackDataFilter
+
+calendar_factory = CallbackData("year", "month", prefix="calendar")
+calendar_zoom = CallbackData("year", prefix="calendar_zoom")
+
+
+class CalendarCallbackFilter(AdvancedCustomFilter):
+    key = 'calendar_config'
+
+    def check(self, call: types.CallbackQuery, config: CallbackDataFilter):
+        return config.check(query=call)
+
+
+class CalendarZoomCallbackFilter(AdvancedCustomFilter):
+    key = 'calendar_zoom_config'
+
+    def check(self, call: types.CallbackQuery, config: CallbackDataFilter):
+        return config.check(query=call)
+
+
+def bind_filters(bot: telebot.TeleBot):
+    bot.add_custom_filter(CalendarCallbackFilter())
+    bot.add_custom_filter(CalendarZoomCallbackFilter())

examples/callback_data_examples/advanced_calendar_example/keyboards.py

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+import calendar
+from datetime import date, timedelta
+
+from examples.callback_data_examples.advanced_calendar_example.filters import calendar_factory, calendar_zoom
+from telebot.types import InlineKeyboardMarkup, InlineKeyboardButton
+
+EMTPY_FIELD = '1'
+WEEK_DAYS = [calendar.day_abbr[i] for i in range(7)]
+MONTHS = [(i, calendar.month_name[i]) for i in range(1, 13)]
+
+
+def generate_calendar_days(year: int, month: int):
+    keyboard = InlineKeyboardMarkup(row_width=7)
+    today = date.today()
+
+    keyboard.add(
+        InlineKeyboardButton(
+            text=date(year=year, month=month, day=1).strftime('%b %Y'),
+            callback_data=EMTPY_FIELD
+        )
+    )
+    keyboard.add(*[
+        InlineKeyboardButton(
+            text=day,
+            callback_data=EMTPY_FIELD
+        )
+        for day in WEEK_DAYS
+    ])
+
+    for week in calendar.Calendar().monthdayscalendar(year=year, month=month):
+        week_buttons = []
+        for day in week:
+            day_name = ' '
+            if day == today.day and today.year == year and today.month == month:
+                day_name = '🔘'
+            elif day != 0:
+                day_name = str(day)
+            week_buttons.append(
+                InlineKeyboardButton(
+                    text=day_name,
+                    callback_data=EMTPY_FIELD
+                )
+            )
+        keyboard.add(*week_buttons)
+
+    previous_date = date(year=year, month=month, day=1) - timedelta(days=1)
+    next_date = date(year=year, month=month, day=1) + timedelta(days=31)
+
+    keyboard.add(
+        InlineKeyboardButton(
+            text='Previous month',
+            callback_data=calendar_factory.new(year=previous_date.year, month=previous_date.month)
+        ),
+        InlineKeyboardButton(
+            text='Zoom out',
+            callback_data=calendar_zoom.new(year=year)
+        ),
+        InlineKeyboardButton(
+            text='Next month',
+            callback_data=calendar_factory.new(year=next_date.year, month=next_date.month)
+        ),
+    )
+
+    return keyboard
+
+
+def generate_calendar_months(year: int):
+    keyboard = InlineKeyboardMarkup(row_width=3)
+    keyboard.add(
+        InlineKeyboardButton(
+            text=date(year=year, month=1, day=1).strftime('Year %Y'),
+            callback_data=EMTPY_FIELD
+        )
+    )
+    keyboard.add(*[
+        InlineKeyboardButton(
+            text=month,
+            callback_data=calendar_factory.new(year=year, month=month_number)
+        )
+        for month_number, month in MONTHS
+    ])
+    keyboard.add(
+        InlineKeyboardButton(
+            text='Previous year',
+            callback_data=calendar_zoom.new(year=year - 1)
+        ),
+        InlineKeyboardButton(
+            text='Next year',
+            callback_data=calendar_zoom.new(year=year + 1)
+        )
+    )
+    return keyboard

examples/callback_data_examples/advanced_calendar_example/main.py

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+# -*- coding: utf-8 -*-
+"""
+This Example will show you an advanced usage of CallbackData.
+In this example calendar was implemented
+"""
+
+from datetime import date
+
+from examples.callback_data_examples.advanced_calendar_example.keyboards import generate_calendar_days, \
+    generate_calendar_months, EMTPY_FIELD
+from filters import calendar_factory, calendar_zoom, bind_filters
+from telebot import types, TeleBot
+
+API_TOKEN = ''
+bot = TeleBot(API_TOKEN)
+
+
+@bot.message_handler(commands='start')
+def start_command_handler(message: types.Message):
+    bot.send_message(message.chat.id,
+                     f"Hello {message.from_user.first_name}. This bot is an example of calendar keyboard."
+                     "\nPress /calendar to see it.")
+
+
+@bot.message_handler(commands='calendar')
+def calendar_command_handler(message: types.Message):
+    now = date.today()
+    bot.send_message(message.chat.id, 'Calendar', reply_markup=generate_calendar_days(year=now.year, month=now.month))
+
+
+@bot.callback_query_handler(func=None, calendar_config=calendar_factory.filter())
+def calendar_action_handler(call: types.CallbackQuery):
+    callback_data: dict = calendar_factory.parse(callback_data=call.data)
+    year, month = int(callback_data['year']), int(callback_data['month'])
+
+    bot.edit_message_reply_markup(call.message.chat.id, call.message.id,
+                                  reply_markup=generate_calendar_days(year=year, month=month))
+
+
+@bot.callback_query_handler(func=None, calendar_zoom_config=calendar_zoom.filter())
+def calendar_zoom_out_handler(call: types.CallbackQuery):
+    callback_data: dict = calendar_zoom.parse(callback_data=call.data)
+    year = int(callback_data.get('year'))
+
+    bot.edit_message_reply_markup(call.message.chat.id, call.message.id,
+                                  reply_markup=generate_calendar_months(year=year))
+
+
+@bot.callback_query_handler(func=lambda call: call.data == EMTPY_FIELD)
+def callback_empty_field_handler(call: types.CallbackQuery):
+    bot.answer_callback_query(call.id)
+
+
+if __name__ == '__main__':
+    bind_filters(bot)
+    bot.infinity_polling()