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