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128 lines
3.6 KiB
128 lines
3.6 KiB
#-- copyright
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# OpenProject is a project management system.
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# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
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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) 2006-2017 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 doc/COPYRIGHT.rdoc for more details.
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#++
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class ParamsToQueryService
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attr_accessor :model,
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:user
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def initialize(model, user)
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self.model = model
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self.user = user
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end
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def call(params)
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query = new_query
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query = apply_filters(query, params)
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query = apply_order(query, params)
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query
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end
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private
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def new_query
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query_class.new(user: user)
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end
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def apply_filters(query, params)
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return query unless params[:filters]
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filters = parse_filters_from_json(params[:filters])
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filters[:attributes].each do |filter_name|
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query = query.where(filter_name,
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filters[:operators][filter_name],
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filters[:values][filter_name])
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end
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query
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end
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def apply_order(query, params)
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return query unless params[:sortBy]
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sort = parse_sorting_from_json(params[:sortBy])
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hash_sort = sort.each_with_object({}) do |(attribute, direction), hash|
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hash[attribute.to_sym] = direction.to_sym
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end
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query.order(hash_sort)
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end
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# Expected format looks like:
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# [
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# {
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# "filtered_field_name": {
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# "operator": "a name for a filter operation",
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# "values": ["values", "for the", "operation"]
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# }
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# },
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# { /* more filters if needed */}
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# ]
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def parse_filters_from_json(json)
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filters = JSON.parse(json)
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operators = {}
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values = {}
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filters.each do |filter|
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attribute = filter.keys.first # there should only be one attribute per filter
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ar_attribute = convert_attribute attribute, append_id: true
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operators[ar_attribute] = filter[attribute]['operator']
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values[ar_attribute] = filter[attribute]['values']
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end
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{
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attributes: values.keys,
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operators: operators,
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values: values
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}
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end
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def parse_sorting_from_json(json)
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JSON.parse(json).map do |(attribute, order)|
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[convert_attribute(attribute), order]
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end
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end
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def convert_attribute(attribute, append_id: false)
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::API::Utilities::PropertyNameConverter.to_ar_name(attribute,
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context: conversion_model,
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refer_to_ids: append_id)
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end
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def conversion_model
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@conversion_model ||= ::API::Utilities::QueryFiltersNameConverterContext.new(query_class)
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end
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def query_class
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model_name = model.name
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"::Queries::#{model_name.pluralize}::#{model_name}Query".constantize
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end
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end
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