replace redis by in-memory object

helpers/redis.js

@@ -1,14 +1,103 @@
 'use strict';
 
-const RedisConnection = require('ioredis');
-const websockets = require('./websockets');
+var notRedis = {
+  state: {},
+  topics: {},
+  
+  publish: function(topic, msg, cb) {
+    //console.log("[notredis] publish",topic,msg);
+    if (!this.topics[topic]) {
+      this.topics[topic] = {
+        subscribers: []
+      };
+    }
+    var t=this.topics[topic];
+    for (var i=0; i<t.subscribers.length; i++) {
+      var s=t.subscribers[i];
+      if (s.handler) {
+        s.handler(topic, msg);
+      }
+    }
+    if (cb) cb(null);
+  },
+
+  subscribe: function(topics, cb) {
+    var handle = {
+      handler: null,
+      on: function(evt, cb) {
+        if (evt == "message") {
+          this.handler = cb;
+        }
+      }
+    };
+    
+    for (var i=0; i<topics.length; i++) {
+      var topic = topics[i];
+      if (!this.topics[topic]) {
+        this.topics[topic] = {
+          subscribers: []
+        };
+      }
+    
+      var t=this.topics[topic];
+      t.subscribers.push(handle);
+    }
+
+    cb(null, handle, topics.length);
+    return handle;
+  },
+
+  get: function(key, cb) {
+    cb(null, this.state[key]);
+    return this.state[key];
+  },
+
+  set: function(key, val, cb) {
+    this.state[key] = val;
+    cb();
+  },
+
+  del: function(key, cb) {
+    delete this.state[key];
+    cb(null);
+  },
+
+  sadd: function(key, skey, cb) {
+    if (!this.state[key]) this.state[key] = {};
+    this.state[key][skey] = true;
+    cb(null);
+  },
+
+  srem: function(key, skey, cb) {
+    if (this.state[key]) {
+      delete this.state[key][skey];
+    }
+    cb(null);
+  },
+
+  smembers: function(key, cb) {
+    cb(null, Object.keys(this.state[key]));
+  },
+
+  incr: function(key, cb) {
+    if (!this.state[key]) this.state[key] = 0;
+    this.state[key]++;
+    cb();
+  },
+
+  expire: function() {
+  },
+}
 
 module.exports = {
-  connectRedis(){
-    const redisHost = process.env.REDIS_PORT_6379_TCP_ADDR || 'localhost';
-    this.connection = new RedisConnection(6379, redisHost);
+  connectRedis: function() {
+    this.connection = notRedis;
   },
-  sendMessage(action, model, attributes, channelId) {
+  getConnection: function() {
+    this.connectRedis();
+    return this.connection;
+  },
+  sendMessage: function(action, model, attributes, channelId) {
     const data = JSON.stringify({
       channel_id: channelId,
       action: action,
@@ -17,12 +106,12 @@ module.exports = {
     });
     this.connection.publish('updates', data);
   },
-  logIp(ip, cb) {
+  logIp: function(ip, cb) {
     this.connection.incr("ip_"+ ip, (err, socketCounter) => {
       cb();
     });
   },
-  rateLimit(namespace, ip, cb) {
+  rateLimit: function(namespace, ip, cb) {
     const key = "limit_"+ namespace + "_"+ ip;
     const redis = this.connection;
 
@@ -47,7 +136,7 @@ module.exports = {
       }
     });
   }, 
-  isOnlineInSpace(user, space, cb) {
+  isOnlineInSpace: function(user, space, cb) {
     this.connection.smembers("space_" + space._id.toString(), function(err, list) {
       if (err) cb(err);
       else {
@@ -59,3 +148,6 @@ module.exports = {
     });
   }
 };
+
+return module.exports;
+