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Retab
This commit is contained in:
Václav 'Ax' Hůla
parent
1c050d7da5
commit
ec94f1d034
3 changed files with 247 additions and 247 deletions
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@ -6,127 +6,127 @@ import psycopg2
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from contextlib import closing
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class Shop:
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""" BrmBar Shop
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""" BrmBar Shop
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Business logic so that only interaction is left in the hands
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of the frontend scripts. """
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def __init__(self, db, currency, profits, cash):
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self.db = db
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self.currency = currency # brmbar.Currency
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self.profits = profits # income brmbar.Account for brmbar profit margins on items
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self.cash = cash # our operational ("wallet") cash account
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Business logic so that only interaction is left in the hands
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of the frontend scripts. """
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def __init__(self, db, currency, profits, cash):
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self.db = db
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self.currency = currency # brmbar.Currency
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self.profits = profits # income brmbar.Account for brmbar profit margins on items
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self.cash = cash # our operational ("wallet") cash account
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@classmethod
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def new_with_defaults(cls, db):
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return cls(db,
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currency = Currency.default(db),
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profits = Account.load(db, name = "BrmBar Profits"),
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cash = Account.load(db, name = "BrmBar Cash"))
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@classmethod
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def new_with_defaults(cls, db):
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return cls(db,
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currency = Currency.default(db),
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profits = Account.load(db, name = "BrmBar Profits"),
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cash = Account.load(db, name = "BrmBar Cash"))
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def sell(self, item, user, amount = 1):
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# Sale: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * sell
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profit = amount * (sell - buy)
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def sell(self, item, user, amount = 1):
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# Sale: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * sell
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profit = amount * (sell - buy)
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transaction = self._transaction(responsible = user, description = "BrmBar sale of {}x {} to {}".format(amount, item.name, user.name))
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item.credit(transaction, amount, user.name)
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user.debit(transaction, cost, item.name) # debit (increase) on a _debt_ account
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self.profits.debit(transaction, profit, "Margin on " + item.name)
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self.db.commit()
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transaction = self._transaction(responsible = user, description = "BrmBar sale of {}x {} to {}".format(amount, item.name, user.name))
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item.credit(transaction, amount, user.name)
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user.debit(transaction, cost, item.name) # debit (increase) on a _debt_ account
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self.profits.debit(transaction, profit, "Margin on " + item.name)
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self.db.commit()
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return cost
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return cost
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def sell_for_cash(self, item, amount = 1):
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# Sale: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * sell
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profit = amount * (sell - buy)
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def sell_for_cash(self, item, amount = 1):
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# Sale: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * sell
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profit = amount * (sell - buy)
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transaction = self._transaction(description = "BrmBar sale of {}x {} for cash".format(amount, item.name))
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item.credit(transaction, amount, "Cash")
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self.cash.debit(transaction, cost, item.name)
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self.profits.debit(transaction, profit, "Margin on " + item.name)
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self.db.commit()
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transaction = self._transaction(description = "BrmBar sale of {}x {} for cash".format(amount, item.name))
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item.credit(transaction, amount, "Cash")
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self.cash.debit(transaction, cost, item.name)
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self.profits.debit(transaction, profit, "Margin on " + item.name)
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self.db.commit()
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return cost
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return cost
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def add_credit(self, credit, user):
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transaction = self._transaction(responsible = user, description = "BrmBar credit replenishment for " + user.name)
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self.cash.debit(transaction, credit, user.name)
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user.credit(transaction, credit, "Credit replenishment")
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self.db.commit()
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def add_credit(self, credit, user):
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transaction = self._transaction(responsible = user, description = "BrmBar credit replenishment for " + user.name)
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self.cash.debit(transaction, credit, user.name)
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user.credit(transaction, credit, "Credit replenishment")
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self.db.commit()
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def withdraw_credit(self, credit, user):
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transaction = self._transaction(responsible = user, description = "BrmBar credit withdrawal for " + user.name)
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self.cash.credit(transaction, credit, user.name)
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user.debit(transaction, credit, "Credit withdrawal")
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self.db.commit()
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def withdraw_credit(self, credit, user):
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transaction = self._transaction(responsible = user, description = "BrmBar credit withdrawal for " + user.name)
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self.cash.credit(transaction, credit, user.name)
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user.debit(transaction, credit, "Credit withdrawal")
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self.db.commit()
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def buy_for_cash(self, item, amount = 1):
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# Buy: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * buy
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def buy_for_cash(self, item, amount = 1):
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# Buy: Currency conversion from item currency to shop currency
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(buy, sell) = item.currency.rates(self.currency)
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cost = amount * buy
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transaction = self._transaction(description = "BrmBar stock replenishment of {}x {} for cash".format(amount, item.name))
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item.debit(transaction, amount, "Cash")
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self.cash.credit(transaction, cost, item.name)
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self.db.commit()
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transaction = self._transaction(description = "BrmBar stock replenishment of {}x {} for cash".format(amount, item.name))
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item.debit(transaction, amount, "Cash")
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self.cash.credit(transaction, cost, item.name)
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self.db.commit()
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return cost
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return cost
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def receipt_to_credit(self, user, credit, description):
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transaction = self._transaction(responsible = user, description = "Receipt: " + description)
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self.profits.credit(transaction, credit, user.name)
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user.credit(transaction, credit, "Credit from receipt: " + description)
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self.db.commit()
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def receipt_to_credit(self, user, credit, description):
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transaction = self._transaction(responsible = user, description = "Receipt: " + description)
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self.profits.credit(transaction, credit, user.name)
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user.credit(transaction, credit, "Credit from receipt: " + description)
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self.db.commit()
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def _transaction(self, responsible = None, description = None):
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with closing(self.db.cursor()) as cur:
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cur.execute("INSERT INTO transactions (responsible, description) VALUES (%s, %s) RETURNING id",
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[responsible.id if responsible else None, description])
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transaction = cur.fetchone()[0]
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return transaction
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def _transaction(self, responsible = None, description = None):
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with closing(self.db.cursor()) as cur:
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cur.execute("INSERT INTO transactions (responsible, description) VALUES (%s, %s) RETURNING id",
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[responsible.id if responsible else None, description])
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transaction = cur.fetchone()[0]
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return transaction
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def credit_balance(self):
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with closing(self.db.cursor()) as cur:
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# We assume all debt accounts share a currency
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sumselect = """
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SELECT SUM(ts.amount)
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FROM accounts AS a
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LEFT JOIN transaction_splits AS ts ON a.id = ts.account
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WHERE a.acctype = %s AND ts.side = %s
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"""
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cur.execute(sumselect, ["debt", 'debit'])
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debit = cur.fetchone()[0] or 0
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cur.execute(sumselect, ["debt", 'credit'])
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credit = cur.fetchone()[0] or 0
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return debit - credit
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def credit_negbalance_str(self):
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return self.currency.str(-self.credit_balance())
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def credit_balance(self):
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with closing(self.db.cursor()) as cur:
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# We assume all debt accounts share a currency
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sumselect = """
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SELECT SUM(ts.amount)
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FROM accounts AS a
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LEFT JOIN transaction_splits AS ts ON a.id = ts.account
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WHERE a.acctype = %s AND ts.side = %s
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"""
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cur.execute(sumselect, ["debt", 'debit'])
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debit = cur.fetchone()[0] or 0
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cur.execute(sumselect, ["debt", 'credit'])
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credit = cur.fetchone()[0] or 0
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return debit - credit
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def credit_negbalance_str(self):
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return self.currency.str(-self.credit_balance())
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def inventory_balance(self):
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balance = 0
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with closing(self.db.cursor()) as cur:
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# Each inventory account has its own currency,
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# so we just do this ugly iteration
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cur.execute("SELECT id FROM accounts WHERE acctype = %s", ["inventory"])
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for inventory in cur:
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invid = inventory[0]
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inv = Account.load(self.db, id = invid)
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# FIXME: This is not correct as each instance of inventory
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# might have been bought for a different price! Therefore,
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# we need to replace the command below with a complex SQL
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# statement that will... ugh, accounting is hard!
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balance += inv.currency.convert(inv.balance(), self.currency)
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return balance
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def inventory_balance_str(self):
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return self.currency.str(self.inventory_balance())
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def inventory_balance(self):
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balance = 0
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with closing(self.db.cursor()) as cur:
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# Each inventory account has its own currency,
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# so we just do this ugly iteration
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cur.execute("SELECT id FROM accounts WHERE acctype = %s", ["inventory"])
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for inventory in cur:
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invid = inventory[0]
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inv = Account.load(self.db, id = invid)
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# FIXME: This is not correct as each instance of inventory
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# might have been bought for a different price! Therefore,
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# we need to replace the command below with a complex SQL
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# statement that will... ugh, accounting is hard!
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balance += inv.currency.convert(inv.balance(), self.currency)
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return balance
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def inventory_balance_str(self):
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return self.currency.str(self.inventory_balance())
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def account_list(self, acctype):
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accts = []
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with closing(self.db.cursor()) as cur:
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cur.execute("SELECT id FROM accounts WHERE acctype = %s ORDER BY name ASC", [acctype])
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for inventory in cur:
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accts += [ Account.load(self.db, id = inventory[0]) ]
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return accts
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def account_list(self, acctype):
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accts = []
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with closing(self.db.cursor()) as cur:
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cur.execute("SELECT id FROM accounts WHERE acctype = %s ORDER BY name ASC", [acctype])
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for inventory in cur:
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accts += [ Account.load(self.db, id = inventory[0]) ]
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return accts
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