Class: FindSubscriptions::Detectors::RepeatCharges

Inherits:
Object
  • Object
show all
Defined in:
lib/detectors/repeat_charges.rb

Overview

Detects recurring charges by grouping outgoing transactions by normalized payee and amount.

Defined Under Namespace

Classes: Candidate

Instance Method Summary collapse

Constructor Details

#initialize(payee_normalizer:, min_occurrences: 2, min_month_gap_days: 0, max_month_gap_days: 1000) ⇒ RepeatCharges

rubocop:enable Lint/StructNewOverride



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# File 'lib/detectors/repeat_charges.rb', line 20

def initialize(payee_normalizer:, min_occurrences: 2, min_month_gap_days: 0, max_month_gap_days: 1000)
  @payee_normalizer = payee_normalizer
  @min_occurrences = min_occurrences
  @min_gap = min_month_gap_days
  @max_gap = max_month_gap_days
end

Instance Method Details

#detect(transactions) ⇒ Object 



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# File 'lib/detectors/repeat_charges.rb', line 27

def detect(transactions)
  outgoing = transactions.select { |t| t.amount&.positive? }
  groups = outgoing.group_by { |t| [@payee_normalizer.normalize(t.payee), t.amount] }
  groups.filter_map { |(payee_key, amount), txs| build_candidate(payee_key, amount, txs) }
end