seenk 

Flow controller for node.js

Run tests

`npm i

npm test

Install


npm i seenk

Use

Let we have some async function named blaBlaBla returning Promise.
`js
function blaBlaBla(text, delay){
delay = Number(delay) || 0;

return new Promise(function(resolve, reject){
setTimeout(function(){
resolve(text);
}, delay);
});
}
`

$3

If you need some async functions to be executed synchronously you should wrap it by generator function and use Seenk:

`js
Seenk(function*(){
var greeting = '';

greeting += (yield blaBlaBla('Hello', 100)) +
(yield blaBlaBla(' ', 300)) +
(yield blaBlaBla('World', 300)) +
(yield blaBlaBla('!'));

return greeting;
})
`

All of this blaBlaBla will be executed by turns.

Also Seenk returns you a Promise to allow you getting result of generator function.

`js
Seenk(function*(){
var greeting = '';

greeting += (yield blaBlaBla('Hello', 100)) +
(yield blaBlaBla(' ', 300)) +
(yield blaBlaBla('World', 300)) +
(yield blaBlaBla('!'));

return greeting;
}).then(function(greeting){
console.log(greeting);
});
`
This outputs Hello World! into console after 700ms.




$3

If you need to get results of some independent async functions running parallely

`js
Seenk([
blaBlaBla('Hello', 100),
blaBlaBla(' ', 200),
blaBlaBla('World', 300),
blaBlaBla('!', 500)
])
`

Seenk will return you a Promise which will resolve Hello World! in 500ms after the longest delay will pass.

$3

`js
var wrapped = Seenk.wrap(function*(){
var message = '';

message += (yield blaBlaBla('Wrap', 100)) +
(yield blaBlaBla(' ', 200)) +
(yield blaBlaBla('me', 300)) +
(yield blaBlaBla('!'));

return message;
})
`

And now you have function wrapped` returning Promise.