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""" |
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byceps.services.consent.consent_service |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2006-2020 Jochen Kupperschmidt |
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:License: Modified BSD, see LICENSE for details. |
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""" |
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from datetime import datetime |
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from typing import Dict, Iterable, Sequence, Set |
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from ...database import db |
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from ...typing import UserID |
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from ..verification_token.models import Token |
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from .models.consent import Consent as DbConsent |
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from .models.subject import Subject as DbSubject |
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from .transfer.models import SubjectID |
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def build_consent( |
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user_id: UserID, subject_id: SubjectID, expressed_at: datetime |
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) -> DbConsent: |
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"""Create user's consent to that subject.""" |
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return DbConsent(user_id, subject_id, expressed_at) |
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def consent_to_subject( |
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subject_id: SubjectID, expressed_at: datetime, verification_token: Token |
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) -> None: |
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"""Store the user's consent to that subject, and invalidate the |
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verification token. |
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""" |
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consent_to_subjects([subject_id], expressed_at, verification_token) |
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def consent_to_subjects( |
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subject_ids: Iterable[SubjectID], |
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expressed_at: datetime, |
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verification_token: Token, |
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) -> None: |
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"""Store the user's consent to these subjects, and invalidate the |
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verification token. |
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""" |
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user_id = verification_token.user_id |
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db.session.delete(verification_token) |
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for subject_id in subject_ids: |
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consent = build_consent(user_id, subject_id, expressed_at) |
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db.session.add(consent) |
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db.session.commit() |
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def count_consents_by_subject() -> Dict[str, int]: |
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"""Return the number of given consents per subject.""" |
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rows = db.session \ |
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.query( |
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DbSubject.name, |
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db.func.count(DbConsent.user_id) |
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) \ |
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.outerjoin(DbConsent) \ |
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.group_by(DbSubject.name) \ |
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.all() |
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return dict(rows) |
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def get_consents_by_user(user_id: UserID) -> Sequence[DbConsent]: |
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"""Return the consents the user submitted.""" |
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return DbConsent.query \ |
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.filter_by(user_id=user_id) \ |
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.all() |
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def get_unconsented_subject_ids( |
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user_id: UserID, required_subject_ids: Set[SubjectID] |
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) -> Set[SubjectID]: |
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"""Return the IDs of the subjects the user has not consented to.""" |
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unconsented_subject_ids = set() |
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for subject_id in required_subject_ids: |
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if not has_user_consented_to_subject(user_id, subject_id): |
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unconsented_subject_ids.add(subject_id) |
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return unconsented_subject_ids |
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def has_user_consented_to_all_subjects( |
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user_id: UserID, subject_ids: Set[SubjectID] |
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) -> bool: |
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"""Return `True` if the user has consented to all given subjects.""" |
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for subject_id in subject_ids: |
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if not has_user_consented_to_subject(user_id, subject_id): |
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return False |
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return True |
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def has_user_consented_to_subject( |
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user_id: UserID, subject_id: SubjectID |
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) -> bool: |
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"""Determine if the user has consented to the subject.""" |
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return db.session \ |
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.query( |
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db.session |
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.query(DbConsent) |
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.filter_by(user_id=user_id) |
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.filter_by(subject_id=subject_id) |
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.exists() |
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) \ |
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.scalar() |
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