54 lines
1010 B
Ruby
54 lines
1010 B
Ruby
# frozen_string_literal: true
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class PreviewCardFilter
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KEYS = %i(
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trending
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).freeze
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attr_reader :params
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def initialize(params)
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@params = params
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end
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def results
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scope = PreviewCard.unscoped
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params.each do |key, value|
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next if key.to_s == 'page'
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scope.merge!(scope_for(key, value.to_s.strip)) if value.present?
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end
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scope
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end
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private
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def scope_for(key, value)
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case key.to_s
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when 'trending'
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trending_scope(value)
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else
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raise "Unknown filter: #{key}"
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end
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end
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def trending_scope(value)
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ids = begin
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case value.to_s
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when 'allowed'
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Trends.links.currently_trending_ids(true, -1)
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else
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Trends.links.currently_trending_ids(false, -1)
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end
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end
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if ids.empty?
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PreviewCard.none
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else
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PreviewCard.joins("join unnest(array[#{ids.map(&:to_i).join(',')}]::integer[]) with ordinality as x (id, ordering) on preview_cards.id = x.id").order('x.ordering')
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end
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end
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end
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