41 lines
1.4 KiB
Python
41 lines
1.4 KiB
Python
from .models import Portfolio
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ACTION_FIELD_MAP = {
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'like': 'likers',
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'scrap': 'scrappers',
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}
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class PortfolioBeforeRelCheckService:
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@staticmethod
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def check_user_portfolio_rel(action_type: str, portfolio: Portfolio, user):
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action = ACTION_FIELD_MAP.get(action_type)
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if not action:
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raise ValueError(f"'{action_type}' is unsupported action type")
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if getattr(portfolio, action).filter(id=user.id).exists():
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return True
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else:
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return False
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class PortfolioStateChangeService:
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@staticmethod
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def change_user_portfolio_rel(action_type: str, portfolio: Portfolio, user, add=True):
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action = ACTION_FIELD_MAP.get(action_type)
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if not action:
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raise ValueError(f"'{action_type}' is unsupported action type")
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user_method = getattr(getattr(portfolio, action), 'add' if add else 'remove')
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user_method(user)
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@staticmethod
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def change_count_portfolio_state(action_type: str, portfolio: Portfolio, add=True):
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action = ACTION_FIELD_MAP.get(action_type)
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if not action:
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raise ValueError(f"'{action_type}' is unsupported action type")
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field_name = action_type + '_count'
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current_count = getattr(portfolio, field_name)
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now_count = current_count+1 if add else max(current_count-1, 0)
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setattr(portfolio, field_name, now_count)
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portfolio.save(update_fields=[field_name])
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