Added an atomic addCount to RateLimit

lib/advanced_structures/RateLimit.js

@@ -139,3 +139,50 @@ RateLimit.prototype.count = function (subject, interval, callback) {
 
     return this;
 }
+
+/**
+ * An alias for `ratelimit.add(subject).count(subject, interval);`
+ *
+ * @param {string} subject
+ * @param {int} interval
+ * @param {Function} callback
+ * @return this
+ * @api public
+ */
+
+RateLimit.prototype.addCount = function (subject, interval, callback) {
+    var bucket = this.getBucket(),
+        multi = this.client.multi(),
+        count = Math.floor(interval / this.bucket_interval);
+
+    subject = this.key + ':' + subject;
+
+    //Increment the current bucket
+    multi.hincrby(subject, bucket, 1)
+
+    //Clear the buckets ahead
+    multi.hdel(subject, (bucket + 1) % this.bucket_count)
+         .hdel(subject, (bucket + 2) % this.bucket_count)
+
+    //Renew the key TTL
+    multi.expire(subject, this.subject_expiry);
+
+    //Get the counts from the previous `count` buckets
+    multi.hget(subject, bucket);
+    while (count--) {
+        multi.hget(subject, (--bucket + this.bucket_count) % this.bucket_count);
+    }
+
+    //Add up the counts from each bucket
+    multi.exec(function (err, counts) {
+        if (err) return callback(err, null);
+        for (var count = 0, i = 4, l = counts.length; i < l; i++) {
+            if (counts[i]) {
+                count += parseInt(counts[i], 10);
+            }
+        }
+        callback(null, count);
+    });
+
+    return this;
+}

package.json

@@ -1,6 +1,6 @@
 { "name"          : "redback",
   "description"   : "A high-level Redis library",
-  "version"       : "0.2.2",
+  "version"       : "0.2.3",
   "homepage"      : "https://github.com/chriso/redback",
   "author"        : "Chris O'Hara <cohara87@gmail.com>",
   "main"          : "index",

site/index.html

@@ -78,7 +78,7 @@
         #content h2 {
             font-size: 24px;
             margin: 28px 0 14px 0;
-            text-shadow: 1px 1px 1px rgba(20,20,20,0.3);
+            text-shadow: 1px 1px 1px rgba(20,20,20,0.2);
         }
         #content p {
             padding-left: 2px;