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33 lines
983 B
Lua
33 lines
983 B
Lua
local util = require "rx.util"
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--- @class Subscription
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-- @description A handle representing the link between an Observer and an Observable, as well as any
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-- work required to clean up after the Observable completes or the Observer unsubscribes.
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local Subscription = {}
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Subscription.__index = Subscription
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Subscription.__tostring = util.constant("Subscription")
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--- Creates a new Subscription.
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-- @arg {function=} action - The action to run when the subscription is unsubscribed. It will only
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-- be run once.
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-- @returns {Subscription}
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function Subscription.create(action)
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local self = {
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action = action or util.noop,
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unsubscribed = false,
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}
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return setmetatable(self, Subscription)
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end
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--- Unsubscribes the subscription, performing any necessary cleanup work.
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function Subscription:unsubscribe()
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if self.unsubscribed then
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return
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end
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self.action(self)
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self.unsubscribed = true
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end
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return Subscription
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