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https://github.com/maybe-finance/maybe.git
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c1d98fe73b
* Add kind field to valuation * Fix schema conflict * Add kind to valuation * Scaffold opening balance manager * Opening balance manager implementation * Update account import to use opening balance manager + tests * Update account to use opening balance manager * Fix test assertions, usage of current balance manager * Lint fixes * Add Opening Balance manager, add tests to forward calculator * Add credit card to "all cash" designation * Simplify valuation model * Add current balance manager with tests * Add current balance logic to reverse calculator and plaid sync * Tweaks to initial calc logic * Ledger testing helper, tweak assertions for reverse calculator * Update test assertions * Extract balance transformer, simplify calculators * Algo simplifications * Final tweaks to calculators * Cleanup * Fix error, propagate sync errors up to parent * Update migration script, valuation naming
66 lines
2.5 KiB
Ruby
66 lines
2.5 KiB
Ruby
class Balance::ForwardCalculator < Balance::BaseCalculator
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def calculate
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Rails.logger.tagged("Balance::ForwardCalculator") do
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start_cash_balance = derive_cash_balance_on_date_from_total(
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total_balance: account.opening_anchor_balance,
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date: account.opening_anchor_date
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)
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start_non_cash_balance = account.opening_anchor_balance - start_cash_balance
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calc_start_date.upto(calc_end_date).map do |date|
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valuation = sync_cache.get_reconciliation_valuation(date)
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if valuation
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end_cash_balance = derive_cash_balance_on_date_from_total(
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total_balance: valuation.amount,
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date: date
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)
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end_non_cash_balance = valuation.amount - end_cash_balance
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else
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end_cash_balance = derive_end_cash_balance(start_cash_balance: start_cash_balance, date: date)
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end_non_cash_balance = derive_end_non_cash_balance(start_non_cash_balance: start_non_cash_balance, date: date)
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end
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output_balance = build_balance(
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date: date,
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cash_balance: end_cash_balance,
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non_cash_balance: end_non_cash_balance
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)
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# Set values for the next iteration
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start_cash_balance = end_cash_balance
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start_non_cash_balance = end_non_cash_balance
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output_balance
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end
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end
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end
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private
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def calc_start_date
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account.opening_anchor_date
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end
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def calc_end_date
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[ account.entries.order(:date).last&.date, account.holdings.order(:date).last&.date ].compact.max || Date.current
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end
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# Negative entries amount on an "asset" account means, "account value has increased"
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# Negative entries amount on a "liability" account means, "account debt has decreased"
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# Positive entries amount on an "asset" account means, "account value has decreased"
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# Positive entries amount on a "liability" account means, "account debt has increased"
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def signed_entry_flows(entries)
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entry_flows = entries.sum(&:amount)
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account.asset? ? -entry_flows : entry_flows
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end
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# Derives cash balance, starting from the start-of-day, applying entries in forward to get the end-of-day balance
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def derive_end_cash_balance(start_cash_balance:, date:)
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derive_cash_balance(start_cash_balance, date)
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end
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# Derives non-cash balance, starting from the start-of-day, applying entries in forward to get the end-of-day balance
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def derive_end_non_cash_balance(start_non_cash_balance:, date:)
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derive_non_cash_balance(start_non_cash_balance, date, direction: :forward)
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end
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end
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