Legend: A group of children - participants come to a full-time shift up to 4 days long [schedule shouldn't have that limit]. The group has the same schedule for everyone (the schedule includes meals, training sessions at the UI, excursions, evenings, etc.) The group has accompanying persons. Accompanying may have a separate schedule. The group has a curator from UI - the owner of the bot. The group has a general chat in the TG. The group has teachers.

• The participant can request his schedule for a specific day.
• The participant can request his schedule for the current (next) activity.
• The accompanying can request their schedule and the participant's schedule for a specific day.
• The accompanying can request his schedule and the participant's schedule for the current (next) activity.
• Together with the answer on the current (next) activity, the participant and the accompanying person can find out the location of the audience in which the lesson will be held
• The participant can request homework for the next day.
• The teacher can upload homework.
• The curator can upload the schedule with audience numbers.
• The curator can upload the list of participants, accompanying, teachers.

All time should be GMT+3
Create a separate file for each task

• Schedule class
• Homeworks class [taken]
• Group class [taken]
• Inline keyboard base [taken]
• Messages [taken]

Create a schedule class that contains information about each activity. Required functions: Parse(String input) - returns a Schedule with all activities

Activity_next() - return string, next activity based on current date/time

Activity_day(String day) - return string, get all activities in a day

Activity_all() - return string, all activities

Input file format:

Date(MM-DD-YYYY) | Time(HH:mm) | Activity | Place

Example:

06-07-2021 | 22:46 | Study | room 108

Output example: (for activity_all())

Date (DD month_name) 
HH:mm | First_activity | Place
HH:mm | Second_activity | Place
Other_Date (DD month_name) 
HH:mm | Other_activity | Place

Homeworks class that contains entries with date and homework text
Functions:
upload() - appends homework to the list, overwrites the entires for the dates that already exist.
get_tomorrow() - return string with homework for tomorrow
get_all() - return string with all existing homeworks

Input format:

MM-DD-YYYY | Hw text

Output format:

DD month_name | Hw text

Group class consists of members:
pupils: Array
accompanying: Array
Teachers: Array
Schedule
Homeworks

Functions:
Parse_members(String input) - sets pupils etc
Format (separator is space):

first line has all pupils (ex: nickname1 second_nick)
second line has all accompanying
third line has all teachers

find_member(String nickname) - returns member type ("pupil", "accompanying", "teacher", "none")

Come up with a best way to display buttons for each user and implement the code(only for the keyboard itself).
Example: You can make use of both inline (in-chat) keyboard and keyboard under the message prompt. Structure for pupil:

Schedule
├── Now  -> reply
├── Day  -> reply
│   ├─ Day 1  -> reply
│   ├─ Day 2  -> reply
│   └─ ...
└── All  -> reply
Homework -> reply

Check the sheet for other members.

Read this and come up with messages for:
/start - introduce to functionality (for each member type, including member not found (it should redirect the user to CURATOR(global const string))).

Read other tasks and come up with messages that explain the input format for schedule, homework.

Error message that redirects to CURATOR

Put all these messages in const variables in a file