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79 lines
2.5 KiB
79 lines
2.5 KiB
#-- copyright
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# OpenProject is an open source project management software.
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# Copyright (C) 2012-2021 the OpenProject GmbH
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2013 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See docs/COPYRIGHT.rdoc for more details.
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#++
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# encoding: UTF-8
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class Report::Transformer
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attr_reader :query
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def initialize(query)
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@query = query
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end
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##
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# @return [Report::Result::Base] Result tree with row group bys at the top
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# @see Report::Chainable#result
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def row_first
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@row_first ||= query.result
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end
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##
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# @return [Report::Result::Base] Result tree with column group bys at the top
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# @see Report::Walker#row_first
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def column_first
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@column_first ||= begin
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# reverse since we fake recursion ↓↓↓
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list = restructured.reverse
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all_fields = @all_fields.dup
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result = list.inject(@ungrouped) do |aggregate, (current_fields, type)|
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fields = all_fields
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all_fields = all_fields - current_fields
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aggregate.grouped_by fields, type, current_fields
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end
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result or query.result
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end
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end
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##
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# Important side effect: it sets @ungrouped, @all_fields.
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# @return [Array<Array<Array<String,Symbol>, Symbol>>] Group by fields + types (:row or :column)
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def restructured
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rows = []
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columns = []
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current = query.chain
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@all_fields = []
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until current.filter?
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@ungrouped = current.result if current.responsible_for_sql?
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list = current.row? ? rows : columns
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list << [current.group_fields, current.type]
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@all_fields.push(*current.group_fields)
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current = current.child
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end
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columns + rows
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end
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end
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