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""" |
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byceps.services.shop.article.article_domain_service |
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~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
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:Copyright: 2014-2024 Jochen Kupperschmidt |
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:License: Revised BSD (see `LICENSE` file for details) |
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""" |
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from datetime import datetime |
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from moneyed import Money |
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from byceps.util.result import Err, Ok, Result |
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from .errors import SomeArticlesLackFixedQuantityError |
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from .models import Article, ArticleCompilation, ArticleWithQuantity |
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def is_article_available_now(article: Article) -> bool: |
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"""Return `True` if the article is available at this moment in time.""" |
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start = article.available_from |
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end = article.available_until |
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now = datetime.utcnow() |
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return (start is None or start <= now) and (end is None or now < end) |
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def calculate_total_amount( |
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articles_with_quantities: list[ArticleWithQuantity], |
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) -> Money: |
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"""Calculate total amount of articles with quantities.""" |
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if not articles_with_quantities: |
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raise ValueError('No articles with quantity given') |
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return sum(awq.amount for awq in articles_with_quantities) # type: ignore[return-value] |
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def calculate_article_compilation_total_amount( |
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compilation: ArticleCompilation, |
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) -> Result[Money, SomeArticlesLackFixedQuantityError]: |
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"""Calculate total amount of articles and their attached articles in |
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the compilation. |
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""" |
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if any(item.fixed_quantity is None for item in compilation): |
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return Err(SomeArticlesLackFixedQuantityError()) |
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articles_with_quantities = [ |
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ArticleWithQuantity(item.article, item.fixed_quantity) |
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for item in compilation |
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] |
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total_amount = calculate_total_amount(articles_with_quantities) |
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return Ok(total_amount) |
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byceps /
byceps
