42 lines
959 B
Ruby
42 lines
959 B
Ruby
# frozen_string_literal: true
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require 'csv'
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require 'time'
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require 'fileutils'
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# Append-only log of the last N logins. Stored as CSV so it survives restarts.
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class LastCallersRepository
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Caller = Struct.new(:timestamp, :username, :session_id)
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def initialize(path, limit: 50)
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@path = path
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@limit = limit
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@mu = Mutex.new
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@entries = load
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end
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def record(username, session_id)
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entry = Caller.new(Time.now.iso8601, username, session_id)
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@mu.synchronize do
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@entries << entry
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@entries.shift while @entries.size > @limit
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FileUtils.mkdir_p(File.dirname(@path))
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CSV.open(@path, 'a') { |csv| csv << [entry.timestamp, entry.username, entry.session_id] }
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end
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entry
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end
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def recent(n = 10)
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@mu.synchronize { @entries.last(n).reverse }
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end
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private
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def load
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return [] unless File.exist?(@path)
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CSV.read(@path).map { |row| Caller.new(*row) }
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rescue StandardError
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[]
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end
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end
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