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Code Issues Releases Activity Actions

Multi-Currency Part 2 (#543)

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* Support all currencies, handle outside DB

* Remove currencies from seed

* Fix account balance namespace

* Set default currency on authentication

* Cache currency instances

* Implement multi-currency syncs with tests

* Series fallback, passing tests

* Fix conflicts

* Make value group concrete class that works with currency values

* Fix migration conflict

* Update tests to expect multi-currency results

* Update account list to use group method

* Namespace updates

* Fetch unknown exchange rates from API

* Fix date range bug

* Ensure demo data works without external API

* Enforce cascades only at DB level
This commit is contained in:
Zach Gollwitzer 2024-03-21 13:39:10 -04:00 • committed by GitHub
parent de0cba9fed
commit 110855d077
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55 changed files with 1226 additions and 714 deletions
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40
app/models/account/balance_calculator.rb
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@ -1,40 +0,0 @@
class Account::BalanceCalculator
def initialize(account)
@account = account
end
def daily_balances(start_date = nil)
calc_start_date = [ start_date, @account.effective_start_date ].compact.max
valuations = @account.valuations.where("date >= ?", calc_start_date).order(:date).select(:date, :value, :currency)
transactions = @account.transactions.where("date > ?", calc_start_date).order(:date).select(:date, :amount, :currency)
oldest_entry = [ valuations.first, transactions.first ].compact.min_by(&:date)
net_transaction_flows = transactions.sum(&:amount)
net_transaction_flows *= -1 if @account.classification == "liability"
implied_start_balance = oldest_entry.is_a?(Valuation) ? oldest_entry.value : @account.balance + net_transaction_flows
prior_balance = implied_start_balance
calculated_balances = ((calc_start_date + 1.day)...Date.current).map do |date|
valuation = valuations.find { |v| v.date == date }
if valuation
current_balance = valuation.value
else
current_day_net_transaction_flows = transactions.select { |t| t.date == date }.sum(&:amount)
current_day_net_transaction_flows *= -1 if @account.classification == "liability"
current_balance = prior_balance - current_day_net_transaction_flows
end
prior_balance = current_balance
{ date: date, balance: current_balance, updated_at: Time.current }
end
[
{ date: calc_start_date, balance: implied_start_balance, updated_at: Time.current },
*calculated_balances,
{ date: Date.current, balance: @account.balance, updated_at: Time.current } # Last balance must always match "source of truth"
]
end
end