module LoanCreator::BorrowerTimetable
Constants
- BORROWER_FINANCIAL_ATTRIBUTES
Public Instance Methods
borrower_timetable(*lenders_timetables)
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# File lib/loan_creator/borrower_timetable.rb, line 15 def borrower_timetable(*lenders_timetables) raise ArgumentError.new('Array of LoanCreator::Timetable expected') unless Array === lenders_timetables raise ArgumentError.new('At least one LoanCreator::Timetable expected') unless lenders_timetables.length > 0 lenders_timetables.each do |lender_timetable| raise ArgumentError.new('Array of LoanCreator::Timetable expected') unless LoanCreator::Timetable === lender_timetable end borrower_timetable = LoanCreator::Timetable.new( starting_index: lenders_timetables.first.starting_index, loan: lenders_timetables.first.loan ) # Borrower timetable is not concerned with computation-related value (delta, etc.), # thus we start with all values to zero, then we override only BORROWER_FINANCIAL_ATTRIBUTES. all_zero = LoanCreator::Term::ARGUMENTS.each_with_object({}) { |k, h| h[k] = bigd('0') } # Group lenders' terms by index transposed_terms = lenders_timetables.map(&:terms).transpose # For each term, sum each required element # First borrower's term contains the sums of lenders' first terms' elements (LoanCreator::Term::ARGUMENT), etc. transposed_terms.each do |arr| term = BORROWER_FINANCIAL_ATTRIBUTES.each_with_object({}) do |k, h| h[k] = arr.inject(bigd('0')) { |sum, tt| sum + tt.send(k) } end borrower_timetable << LoanCreator::Term.new(**all_zero.merge(term)) end borrower_timetable end