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var Promise = require('any-promise')
module.exports = function (stream, done) {
if (!stream) {
// no arguments, meaning stream = this
stream = this
} else if (typeof stream === 'function') {
// stream = this, callback passed
done = stream
stream = this
}
var deferred
if (!stream.readable) deferred = Promise.resolve([])
else deferred = new Promise(function (resolve, reject) {
// stream is already ended
if (!stream.readable) return resolve([])
var arr = []
stream.on('data', onData)
stream.on('end', onEnd)
stream.on('error', onEnd)
stream.on('close', onClose)
function onData(doc) {
arr.push(doc)
}
function onEnd(err) {
if (err) reject(err)
else resolve(arr)
cleanup()
}
function onClose() {
resolve(arr)
cleanup()
}
function cleanup() {
arr = null
stream.removeListener('data', onData)
stream.removeListener('end', onEnd)
stream.removeListener('error', onEnd)
stream.removeListener('close', onClose)
}
})
if (typeof done === 'function') {
deferred.then(function (arr) {
process.nextTick(function() {
done(null, arr)
})
}, done)
}
return deferred
}
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