initial commit.

helpers/redis.js

@@ -0,0 +1,61 @@
+'use strict';
+
+const RedisConnection = require('ioredis');
+const websockets = require('./websockets');
+
+module.exports = {
+  connectRedis(){
+    const redisHost = process.env.REDIS_PORT_6379_TCP_ADDR || 'localhost';
+    this.connection = new RedisConnection(6379, redisHost);
+  },
+  sendMessage(action, model, attributes, channelId) {
+    const data = JSON.stringify({
+      channel_id: channelId,
+      action: action,
+      model: model,
+      object: attributes
+    });
+    this.connection.publish('updates', data);
+  },
+  logIp(ip, cb) {
+    this.connection.incr("ip_"+ ip, (err, socketCounter) => {
+      cb();
+    });
+  },
+  rateLimit(namespace, ip, cb) {
+    const key = "limit_"+ namespace + "_"+ ip;
+    const redis = this.connection;
+
+    redis.get(key, (err, count)=> {
+      if (count) {
+        if(count < 150) {
+          redis.incr(key, (err, newCount) => {
+            if (newCount==150) {
+              // limit
+            }
+            cb(true);
+          });
+        } else {
+          cb(false);
+        }
+      } else {
+        redis.set(key, 1, (err, count) => {
+          redis.expire(key, 1800, (err, expResult) => {
+            cb(true);
+          });
+        });
+      }
+    });
+  }, 
+  isOnlineInSpace(user, space, cb) {
+    this.connection.smembers("space_" + space._id.toString(), function(err, list) {
+      if (err) cb(err);
+      else {
+        var users = list.filter(function(item) {
+          return user._id.toString() === item;
+        });
+        cb(null, (users.length > 0));
+      }
+    });
+  }
+};