Implement forEachSeries() in promises module

1 files changed, 17 insertions, 2 deletions

diff --git a/lib/promises.js b/lib/promises.js
index f008200..0da48bb 100644
--- a/lib/promises.js
+++ b/lib/promises.js
@@ -7,8 +7,23 @@ exports.resolve = bluebird.resolve;
 exports.reject = bluebird.reject;
 
 exports.forEachSeries = function(array, func) {
-    return bluebird.mapSeries(array, func).then(function() {
-    });
+    var arrayIndex = 0;
+
+    var deferred = defer();
+
+    var next = function() {
+        if (arrayIndex < array.length) {
+            var element = array[arrayIndex];
+            arrayIndex++;
+            func(element).then(next, deferred.reject);
+        } else {
+            deferred.resolve();
+        }
+    };
+
+    next();
+
+    return deferred.promise;
 };
 
 var props = exports.props = function(obj) {