100 lines
2 KiB
Ruby
100 lines
2 KiB
Ruby
# frozen_string_literal: true
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class Trends::History
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include Enumerable
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class Aggregate
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include Redisable
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def initialize(prefix, id, date_range)
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@days = date_range.map { |date| Day.new(prefix, id, date.to_time(:utc)) }
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end
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def uses
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with_redis { |redis| redis.mget(*@days.map { |day| day.key_for(:uses) }).map(&:to_i).sum }
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end
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def accounts
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with_redis { |redis| redis.pfcount(*@days.map { |day| day.key_for(:accounts) }) }
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end
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end
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class Day
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include Redisable
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EXPIRE_AFTER = 14.days.seconds
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def initialize(prefix, id, day)
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@prefix = prefix
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@id = id
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@day = day.beginning_of_day
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end
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attr_reader :day
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def accounts
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with_redis { |redis| redis.pfcount(key_for(:accounts)) }
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end
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def uses
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with_redis { |redis| redis.get(key_for(:uses))&.to_i || 0 }
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end
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def add(account_id)
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with_redis do |redis|
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redis.pipelined do |pipeline|
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pipeline.incrby(key_for(:uses), 1)
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pipeline.pfadd(key_for(:accounts), account_id)
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pipeline.expire(key_for(:uses), EXPIRE_AFTER)
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pipeline.expire(key_for(:accounts), EXPIRE_AFTER)
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end
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end
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end
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def as_json
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{ day: day.to_i.to_s, accounts: accounts.to_s, uses: uses.to_s }
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end
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def key_for(suffix)
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case suffix
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when :accounts
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"#{key_prefix}:#{suffix}"
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when :uses
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key_prefix
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end
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end
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def key_prefix
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"activity:#{@prefix}:#{@id}:#{day.to_i}"
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end
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end
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def initialize(prefix, id)
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@prefix = prefix
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@id = id
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end
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def get(date)
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Day.new(@prefix, @id, date)
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end
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def add(account_id, at_time = Time.now.utc)
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Day.new(@prefix, @id, at_time).add(account_id)
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end
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def aggregate(date_range)
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Aggregate.new(@prefix, @id, date_range)
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end
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def each(&block)
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if block_given?
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(0...7).map { |i| block.call(get(i.days.ago)) }
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else
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to_enum(:each)
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end
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end
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def as_json(*)
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map(&:as_json)
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end
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end
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