npm install tally_ho

Not ready for use yet.

It combines (event emitter + async-like) functionality.

After you call .finish in a callback, the next event callback is run. In other words: a waterfall pattern.

var F = require('tally_ho').Tally_Ho;

F.on("read Bot", function(flow) {
  ...
  My_DB.read({...}, function (err, val) {
    flow.finish(val);
  });
});

F.on("read Bot", function(flow) {
  console.log(flow.last);
  flow.finish();
});

F.on("before read Bot", function(flow) {
  ...
});

F.on("after read Bot", function(flow) {
  ...
});

F.run("read Bot", function (flow) {
   console.log(flow.val);
});

var my_flow = F.new();

my_flow.on("add", function (f) {
    f.finish(f.data.a + f.data.b);
});

my_flow.on("subtract", function (f) {
    console.log(f.last) // == 1 + 2
    f.finish();
});

my_flow.run("add", "subtract", {a: 1, b: 2});

You can pass a data objects (ie {my\_key: val}) on your runs. You can also pass multiple objects. Each object will be "merged" into the first one you pass:

var my_flow = F.new();

my_flow.on('multi-merge', function (f) {
  f.data.a // --> 1
  f.data.b // --> 2
  f.data.c = 3;
  f.finish();
});

var data_1 = {a: 1};
var data_2 = {b: 2};
my_flow.run('multi-merge', data_1, data_2);
data_1 // --> { a: 1, b: 2, c: 3}