neurontab 'where is' foursquare checkin

4sq-whereis.js

function(msg){
  if (msg.type == "foursquare") {
    db.set('whereisdonpdonp', JSON.stringify(msg['checkin']))
  }

  if (msg.type == "emessage") {
    var override = /where is donpdonp/.test(msg.message)
    if(override ||  msg.to_nick == 'donpdonp'){
      var checkin = db.get('whereisdonpdonp')
      var text = ""
      if(!checkin) { 
        text = "null island" 
      } else { 
        checkin = JSON.parse(checkin)
        venue = checkin.venue
        var time = new Date(checkin.createdAt*1000)
        var time_diff = (new Date()) - time
        var diff_minutes = time_diff / 1000 / 60
        var categories = venue.categories.map(function(e){
          if(e.parents.length > 0) {
            return e.parents[0]
          } else {
            return e.name
          }
        })
        if(diff_minutes < 45 || override) {
          if(msg.nick) {
            text += msg.nick+": donpdonp is "
          }
          if(categories.indexOf('Food') > -1) {
            text += "eating "
          }
          text += "at "+venue.name+" ("+diff_minutes.toFixed(0)+" mins ago)"
        }
      }

      return text
    }
  }
}