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- # frozen_string_literal: true
- class Trends::PreviewCardFilter
- KEYS = %i(
- trending
- locale
- ).freeze
- attr_reader :params
- def initialize(params)
- @params = params
- end
- def results
- scope = initial_scope
- params.each do |key, value|
- next if %w(page).include?(key.to_s)
- scope.merge!(scope_for(key, value.to_s.strip)) if value.present?
- end
- scope
- end
- private
- def initial_scope
- PreviewCard.select(PreviewCard.arel_table[Arel.star])
- .joins(:trend)
- .eager_load(:trend)
- .reorder(score: :desc)
- end
- def scope_for(key, value)
- case key.to_s
- when 'trending'
- trending_scope(value)
- when 'locale'
- PreviewCardTrend.where(language: value)
- else
- raise "Unknown filter: #{key}"
- end
- end
- def trending_scope(value)
- case value
- when 'allowed'
- PreviewCardTrend.allowed
- else
- PreviewCardTrend.all
- end
- end
- end
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