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from datetime import datetime |
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from uuid import UUID |
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from app.api.participants.schemas import Participant |
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from app.core.config import ( |
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PARTICIPANT_EXPECTED_PARTS, |
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PARTICIPANT_PARSE_EMPTY_ERROR, |
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PARTICIPANT_PARSE_INVALID_ERROR, |
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PARTICIPANT_SEPARATOR, |
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) |
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class ParticipantLineParser: |
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SEPARATOR = PARTICIPANT_SEPARATOR |
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EXPECTED_PARTS = PARTICIPANT_EXPECTED_PARTS |
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@classmethod |
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def parse(cls, line: str) -> Participant: |
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raw = line.strip() |
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if not raw: |
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raise ValueError(PARTICIPANT_PARSE_EMPTY_ERROR) |
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parts = raw.split(cls.SEPARATOR) |
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if len(parts) != cls.EXPECTED_PARTS: |
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raise ValueError(PARTICIPANT_PARSE_INVALID_ERROR) |
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participant_id, first_name, last_name, nickname, registered_at, activity_rating = parts |
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return Participant( |
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id=UUID(participant_id), |
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first_name=first_name, |
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last_name=last_name, |
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nickname=nickname, |
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registered_at=datetime.fromisoformat(registered_at), |
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activity_rating=float(activity_rating), |
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) |
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@classmethod |
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def serialize(cls, participant: Participant) -> str: |
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return cls.SEPARATOR.join( |
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[ |
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str(participant.id), |
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participant.first_name, |
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participant.last_name, |
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participant.nickname, |
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participant.registered_at.isoformat(), |
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f"{participant.activity_rating}", |
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] |
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) |
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