pushd/lib/event.js

Blazing fast multi-protocol mobile push notification service

// Generated by CoffeeScript 1.4.0
(function() {
  var Event, async, logger,
    __hasProp = {}.hasOwnProperty;

  async = require('async');

  logger = require('winston');

  Event = (function() {

    Event.prototype.OPTION_IGNORE_MESSAGE = 1;

    Event.prototype.name_format = /^[a-zA-Z0-9:._-]{1,100}$/;

    function Event(redis, name) {
      this.redis = redis;
      this.name = name;
      if (!(redis != null)) {
        throw new Error("Missing redis connection");
      }
      if (!Event.prototype.name_format.test(this.name)) {
        throw new Error('Invalid event name ' + this.name);
      }
      this.key = "event:" + this.name;
    }

    Event.prototype.info = function(cb) {
      var _this = this;
      while (!cb) {
        return;
      }
      return this.redis.multi().hgetall(this.key).zcard("" + this.key + ":subs").exec(function(err, results) {
        var f, info, key, num, value, _ref;
        if (((function() {
          var _ref, _results;
          _ref = results[0];
          _results = [];
          for (f in _ref) {
            if (!__hasProp.call(_ref, f)) continue;
            _results.push(f);
          }
          return _results;
        })()).length) {
          info = {
            total: results[1]
          };
          _ref = results[0];
          for (key in _ref) {
            if (!__hasProp.call(_ref, key)) continue;
            value = _ref[key];
            num = parseInt(value);
            info[key] = num + '' === value ? num : value;
          }
          return cb(info);
        } else {
          return cb(null);
        }
      });
    };

    Event.prototype.exists = function(cb) {
      var _this = this;
      if (this.name === 'broadcast') {
        return cb(true);
      } else {
        return this.redis.sismember("events", this.name, function(err, exists) {
          return cb(exists);
        });
      }
    };

    Event.prototype["delete"] = function(cb) {
      var subscriberCount,
        _this = this;
      logger.verbose("Deleting event " + this.name);
      subscriberCount = 0;
      return this.forEachSubscribers(function(subscriber, subOptions, done) {
        subscriber.removeSubscription(_this, done);
        return subscriberCount += 1;
      }, function() {
        logger.verbose("Unsubscribed " + subscriberCount + " subscribers from " + _this.name);
        return _this.redis.multi().del(_this.key).srem("events", _this.name).exec(function(err, results) {
          if (cb) {
            return cb(results[1] > 0);
          }
        });
      });
    };

    Event.prototype.log = function(cb) {
      var _this = this;
      return this.redis.multi().hincrby(this.key, "total", 1).hset(this.key, "last", Math.round(new Date().getTime() / 1000)).exec(function() {
        if (cb) {
          return cb();
        }
      });
    };

    Event.prototype.forEachSubscribers = function(action, finished) {
      var Subscriber, page, perPage, performAction, subscribersKey, total,
        _this = this;
      Subscriber = require('./subscriber').Subscriber;
      if (this.name === 'broadcast') {
        performAction = function(subscriberId, subOptions) {
          return function(done) {
            return action(new Subscriber(_this.redis, subscriberId), {}, done);
          };
        };
      } else {
        performAction = function(subscriberId, subOptions) {
          var options;
          options = {
            ignore_message: (subOptions & Event.prototype.OPTION_IGNORE_MESSAGE) !== 0
          };
          return function(done) {
            return action(new Subscriber(_this.redis, subscriberId), options, done);
          };
        };
      }
      subscribersKey = this.name === 'broadcast' ? 'subscribers' : "" + this.key + ":subs";
      page = 0;
      perPage = 100;
      total = 0;
      return async.whilst(function() {
        return page * perPage === total;
      }, function(done) {
        _this.redis.zrange(subscribersKey, page * perPage, page * perPage + perPage - 1, 'WITHSCORES', function(err, subscriberIdsAndOptions) {
          var i, id, tasks, _i, _len, _step;
          tasks = [];
          for (i = _i = 0, _len = subscriberIdsAndOptions.length, _step = 2; _i < _len; i = _i += _step) {
            id = subscriberIdsAndOptions[i];
            tasks.push(performAction(id, subscriberIdsAndOptions[i + 1]));
          }
          return async.series(tasks, function() {
            total += subscriberIdsAndOptions.length / 2;
            return done();
          });
        });
        return page++;
      }, function() {
        if (finished) {
          return finished(total);
        }
      });
    };

    return Event;

  })();

  exports.Event = Event;

}).call(this);