-
Notifications
You must be signed in to change notification settings - Fork 0
/
index.js
55 lines (46 loc) · 1.3 KB
/
index.js
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
var debug = false;
var When = require('when');
var deferredRunner = null;
var log = function(str){
if(debug){
console.log(str)
}
};
function runner(arr, i, iteratorCB, params){
// This is a recursive function to process the array sequentially using promises
if(!deferredRunner){ deferredRunner = When.defer(); }
if(!params){ var params = ''; }
var iterationPromise = function(arr, i){
var deferred = When.defer();
log('Starting:' + i);
iteratorCB(arr, i, params)
.then(function(params){
log('Finishing:' + i);
if(params.end === true){
deferredRunner.resolve(true);
deferredRunner = null;
}
else{
deferred.resolve([arr, i+1]);
}
});
return deferred.promise;
};
iterationPromise(arr, i)
.then(function(result){
// Receives new item to process
if(result[1] == result[0].length){
// Completed list, resolve promise
deferredRunner.resolve(true);
deferredRunner = null;
}
else{
// Recursive call to next item
// result[0]: the array to process
// result[1]: the index to process
runner(result[0], result[1], iteratorCB, params);
}
});
return deferredRunner.promise;
}
exports.run = runner;