Manuel Bustillo
91bbae1c63
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53 lines
1.6 KiB
Ruby
53 lines
1.6 KiB
Ruby
# Copyright (C) 2024 Manuel Bustillo
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# Copyright (C) 2024-2025 LibreWeddingPlanner contributors
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# frozen_string_literal: true
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module Expenses
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class TotalQuery
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private attr_reader :wedding
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def initialize(wedding:)
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@wedding = wedding
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end
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def call
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ActiveRecord::Base.connection.execute(
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ActiveRecord::Base.sanitize_sql_array([query, { wedding_id: wedding.id }])
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).first
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end
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private
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def query
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<<~SQL.squish
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WITH guest_count AS (#{guest_count_per_status}),
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expense_summary AS (#{expense_summary})
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SELECT guest_count.confirmed as confirmed_guests,
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guest_count.projected as projected_guests,
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expense_summary.fixed + expense_summary.variable * guest_count.confirmed as total_confirmed,
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expense_summary.fixed + expense_summary.variable * guest_count.projected as total_projected
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FROM guest_count, expense_summary;
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SQL
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end
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def expense_summary
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<<~SQL.squish
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SELECT coalesce(sum(amount) filter (where pricing_type = 'fixed'), 0) as fixed,
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coalesce(sum(amount) filter (where pricing_type = 'per_person'), 0) as variable
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FROM expenses
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WHERE wedding_id = :wedding_id
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SQL
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end
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def guest_count_per_status
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<<~SQL.squish
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SELECT COALESCE(count(*) filter(where status = #{Guest.statuses['confirmed']}), 0) as confirmed,
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COALESCE(count(*) filter(where status IN (#{Guest.statuses.values_at('confirmed', 'invited', 'tentative').join(',')})), 0) as projected
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FROM guests
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WHERE wedding_id = :wedding_id
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SQL
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end
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end
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end
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