mirror of
https://github.com/YunoHost-Apps/ihatemoney_ynh.git
synced 2024-09-03 19:26:15 +02:00
89 lines
2.8 KiB
Python
89 lines
2.8 KiB
Python
from collections import defaultdict
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from datetime import datetime
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from flaskext.sqlalchemy import SQLAlchemy
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db = SQLAlchemy()
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# define models
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class Project(db.Model):
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id = db.Column(db.String, primary_key=True)
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name = db.Column(db.UnicodeText)
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password = db.Column(db.String)
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contact_email = db.Column(db.String)
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members = db.relationship("Person", backref="project")
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@property
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def active_members(self):
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return [m for m in self.members if m.activated]
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def get_balance(self):
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balances, should_pay, should_receive = defaultdict(int), defaultdict(int), defaultdict(int)
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# for each person
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for person in self.members:
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# get the list of bills he has to pay
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bills = Bill.query.filter(Bill.owers.contains(person))
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for bill in bills.all():
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if person != bill.payer:
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should_pay[person] += bill.pay_each()
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should_receive[bill.payer] += bill.pay_each()
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for person in self.members:
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balances[person] = should_receive[person] - should_pay[person]
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return balances
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def __repr__(self):
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return "<Project %s>" % self.name
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class Person(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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project_id = db.Column(db.Integer, db.ForeignKey("project.id"))
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bills = db.relationship("Bill", backref="payer")
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name = db.Column(db.UnicodeText)
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activated = db.Column(db.Boolean, default=True)
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def is_used(self):
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bills_as_ower_number = db.session.query(Bill).join(billowers, Person)\
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.filter("Bill.id == billowers.bill_id")\
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.filter("Person.id == billowers.person_id")\
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.filter(Person.id == self.id)\
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.count()
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return bills_as_ower_number != 0 or len(self.bills) != 0
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def __str__(self):
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return self.name
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def __repr__(self):
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return "<Person %s for project %s>" % (self.name, self.project.name)
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# We need to manually define a join table for m2m relations
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billowers = db.Table('billowers',
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db.Column('bill_id', db.Integer, db.ForeignKey('bill.id')),
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db.Column('person_id', db.Integer, db.ForeignKey('person.id')),
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)
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class Bill(db.Model):
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id = db.Column(db.Integer, primary_key=True)
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payer_id = db.Column(db.Integer, db.ForeignKey("person.id"))
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owers = db.relationship(Person, secondary=billowers)
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amount = db.Column(db.Float)
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date = db.Column(db.Date, default=datetime.now)
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what = db.Column(db.UnicodeText)
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def pay_each(self):
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"""Compute what each person has to pay"""
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return round(self.amount / len(self.owers), 2)
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def __repr__(self):
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return "<Bill of %s from %s for %s>" % (self.amount,
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self.payer, ", ".join([o.name for o in self.owers]))
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