You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
43 lines
1.3 KiB
Lua
43 lines
1.3 KiB
Lua
local Observable = require "rx.observable"
|
|
local util = require "rx.util"
|
|
|
|
--- Runs a function each time this Observable has activity. Similar to subscribe but does not
|
|
-- create a subscription.
|
|
-- @arg {function=} onNext - Run when the Observable produces values.
|
|
-- @arg {function=} onError - Run when the Observable encounters a problem.
|
|
-- @arg {function=} onCompleted - Run when the Observable completes.
|
|
-- @returns {Observable}
|
|
function Observable:tap(_onNext, _onError, _onCompleted)
|
|
_onNext = _onNext or util.noop
|
|
_onError = _onError or util.noop
|
|
_onCompleted = _onCompleted or util.noop
|
|
|
|
return Observable.create(function(observer)
|
|
local function onNext(...)
|
|
util.tryWithObserver(observer, function(...)
|
|
_onNext(...)
|
|
end, ...)
|
|
|
|
return observer:onNext(...)
|
|
end
|
|
|
|
local function onError(message)
|
|
util.tryWithObserver(observer, function()
|
|
_onError(message)
|
|
end)
|
|
|
|
return observer:onError(message)
|
|
end
|
|
|
|
local function onCompleted()
|
|
util.tryWithObserver(observer, function()
|
|
_onCompleted()
|
|
end)
|
|
|
|
return observer:onCompleted()
|
|
end
|
|
|
|
return self:subscribe(onNext, onError, onCompleted)
|
|
end)
|
|
end
|