After
Invoke callback after n calls
Status: production ready
Example
var after = require("after")
var db = require("./db")
var updateUser = function (req, res) {
var next = after(2, updateUser)
var results = {}
getJSONBody(req, res, function (err, body) {
if (err) return next(err)
results.body = body
next(null, results)
})
getSessionUser(req, res, function (err, user) {
if (err) return next(err)
results.user = user
next(null, results)
})
function updateUser(err, result) {
if (err) {
res.statusCode = 500
return res.end("Unexpected Error")
}
if (!result.user || result.user.role !== "admin") {
res.statusCode = 403
return res.end("Permission Denied")
}
db.put("users:" + req.params.userId, result.body, function (err) {
if (err) {
res.statusCode = 500
return res.end("Unexpected Error")
}
res.statusCode = 200
res.end("Ok")
})
}
}
Naive Example
var after = require("after")
, next = after(3, logItWorks)
next()
next()
next()
function logItWorks() {
console.log("it works!")
}
Example with error handling
var after = require("after")
, next = after(3, logError)
next()
next(new Error("oops"))
next()
function logError(err) {
console.log(err)
}
Installation
npm install after
Tests
npm test
Contributors
MIT Licenced