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require_dependency "renalware/pathology"
require "attr_extras"
module Renalware
module Pathology
# A helper class wrapping a custom relation object which has aggregated a
# patient's pathology results by date of observation using raw SQL + PGResult.
# Note we implement the required interface for kaminari pagination (we delegate to the
# underlying relation to achieve this).
#
# This class exists to make the underlying PGResult set (wrapped in a custom relation-like
# object) easier to consume.
#
# Example usage:
# (ruby)
# codes = %i(HGB PLT WBC)
# rows = ObservationsGroupedByDateQuery.new(patient_id: 1, codes: codes)
# table = ObservationsGroupedByDateTable.new(rows: rows, codes: %i(HGB PLT WBC))
# (html)
# table
# tr
# td Date
# - table.codes do |code|
# td= code
# tbody
# tr
# - table.each_row do |row|
# td= l(row.observed_on)
# - table.codes.each do |code|
# td= row.result_for(code)
#
# = paginate(table)
#
class ObservationsGroupedByDateTable
attr_reader_initialize [:observation_descriptions!, :relation!]
delegate :current_page, :total_pages, :limit_value, to: :relation
def rows
@rows ||= relation.all.map(&:with_indifferent_access).map { |row| Row.new(row) }
end
class Row
pattr_initialize :row
def observed_on
Date.parse(row[:observed_on])
end
def result_for(code)
results[code&.to_sym]
end
def results
@results = JSON.parse(row[:results]).with_indifferent_access
end
end
end
end
end
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