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Patrick authored99033d7d
'use strict';const config = require('config');// this is a mock version of the Redis API,// emulating Redis if it is not available locallyvar notRedis = { state: {}, topics: {}, publish: function(topic, msg, cb) { 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, 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;
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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(null, this.state[key]);
},
expire: function() {
},
}
module.exports = {
connectRedis: function() {
if (config.get("redis_mock")) {
this.connection = notRedis;
} else {
const redisHost = process.env.REDIS_PORT_6379_TCP_ADDR || 'sync';
this.connection = new RedisConnection(6379, redisHost);
}
},
getConnection: function() {
this.connectRedis();
return this.connection;
},
sendMessage: function(action, model, attributes, channelId) {
const data = JSON.stringify({
channel_id: channelId,
action: action,
model: model,
object: attributes
});
this.connection.publish('updates', data);
},
logIp: function(ip, cb) {
this.connection.incr("ip_"+ ip, (err, socketCounter) => {
cb();
});
},
rateLimit: function(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: function(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));
}
});
}
};
return module.exports;