107 lines
1.6 KiB
Ruby
107 lines
1.6 KiB
Ruby
# frozen_string_literal: true
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class Trends::Query
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include Redisable
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include Enumerable
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attr_reader :prefix, :klass, :loaded
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alias loaded? loaded
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def initialize(prefix, klass)
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@prefix = prefix
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@klass = klass
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@records = []
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@loaded = false
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@allowed = false
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@limit = -1
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@offset = 0
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end
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def allowed!
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@allowed = true
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self
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end
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def allowed
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clone.allowed!
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end
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def in_locale!(value)
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@locale = value
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self
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end
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def in_locale(value)
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clone.in_locale!(value)
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end
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def offset!(value)
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@offset = value.to_i
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self
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end
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def offset(value)
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clone.offset!(value)
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end
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def limit!(value)
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@limit = value.to_i
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self
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end
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def limit(value)
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clone.limit!(value)
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end
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def records
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load
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@records
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end
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delegate :each, :empty?, :first, :last, to: :records
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def to_ary
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records.dup
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end
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alias to_a to_ary
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def to_arel
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tmp_ids = ids
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if tmp_ids.empty?
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klass.none
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else
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klass.joins("join unnest(array[#{tmp_ids.join(',')}]) with ordinality as x (id, ordering) on #{klass.table_name}.id = x.id").reorder('x.ordering')
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end
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end
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private
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def key
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[@prefix, @allowed ? 'allowed' : 'all', @locale].compact.join(':')
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end
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def load
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unless loaded?
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@records = perform_queries
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@loaded = true
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end
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self
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end
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def ids
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redis.zrevrange(key, @offset, @limit.positive? ? @limit - 1 : @limit).map(&:to_i)
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end
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def perform_queries
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apply_scopes(to_arel).to_a
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end
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def apply_scopes(scope)
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scope
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end
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end
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