Refactor Redis into middleware

lib/redis.js

@@ -0,0 +1,29 @@
+import redis from 'redis-url';
+import coRedis from 'co-redis';
+import debugname from 'debug';
+const debug = debugname('hostr:redis');
+
+const redisUrl = process.env.REDIS_URL || process.env.REDISTOGO_URL || 'redis://localhost:6379';
+
+let connection = new Promise((resolve, reject) => {
+  debug('Connecting to Redis');
+  const client = redis.connect(redisUrl);
+  const wrapped = coRedis(client);
+  wrapped.client = client;
+  wrapped.on('error', (err) => {
+    debug('Client error: ' + err);
+  });
+  wrapped.on('ready', () => {
+    debug('Successfully connected to Redis');
+    resolve(wrapped);
+  });
+}).catch((err) => {
+  debug('Promise error: ' + err);
+});
+
+export default function () {
+  return function* redisMiddleware(next) {
+    this.redis = yield connection;
+    yield next;
+  }
+}