38 lines
		
	
	
		
			910 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
			
		
		
	
	
			38 lines
		
	
	
		
			910 B
		
	
	
	
		
			Ruby
		
	
	
	
	
	
# frozen_string_literal: true
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class PotentialFriendshipTracker
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  EXPIRE_AFTER = 90.days.seconds
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  MAX_ITEMS    = 80
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  WEIGHTS = {
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    reply: 1,
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    favourite: 10,
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    reblog: 20,
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  }.freeze
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  class << self
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    include Redisable
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    def record(account_id, target_account_id, action)
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      return if account_id == target_account_id
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      key    = "interactions:#{account_id}"
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      weight = WEIGHTS[action]
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      redis.zincrby(key, weight, target_account_id)
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      redis.zremrangebyrank(key, 0, -MAX_ITEMS)
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      redis.expire(key, EXPIRE_AFTER)
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    end
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    def remove(account_id, target_account_id)
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      redis.zrem("interactions:#{account_id}", target_account_id)
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    end
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    def get(account_id, limit: 20, offset: 0)
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      account_ids = redis.zrevrange("interactions:#{account_id}", offset, limit)
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      return [] if account_ids.empty?
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      Account.searchable.where(id: account_ids)
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    end
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  end
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end
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