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41 lines
1.2 KiB
Lua
41 lines
1.2 KiB
Lua
local Observable = require "rx.observable"
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local Subscription = require "rx.subscription"
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--- Returns a new Observable that subscribes to the Observables produced by the original and
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-- produces their values.
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-- @returns {Observable}
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function Observable:flatten()
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return Observable.create(function(observer)
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local subscriptions = {}
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local remaining = 1
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local function onError(message)
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return observer:onError(message)
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end
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local function onCompleted()
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remaining = remaining - 1
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if remaining == 0 then
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return observer:onCompleted()
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end
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end
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local function onNext(observable)
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local function innerOnNext(...)
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observer:onNext(...)
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end
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remaining = remaining + 1
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local subscription = observable:subscribe(innerOnNext, onError, onCompleted)
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subscriptions[#subscriptions + 1] = subscription
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end
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subscriptions[#subscriptions + 1] = self:subscribe(onNext, onError, onCompleted)
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return Subscription.create(function()
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for i = 1, #subscriptions do
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subscriptions[i]:unsubscribe()
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end
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end)
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end)
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end
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