ajax.coffee

# Wrapper around jQuery ajax methods that exposes
# returned data by publishing an event
#
class Ajax
  @getJSON: (url, event)->
    $.getJSON url, (data)->
      Event.trigger(event, data)

window.Ajax = Ajax

event.coffee

# Public: tiny wrapper on javascript events
#
class Event
  # Public: register an event handler
  #
  # event - The name of the event
  # data  - optional data passed along with the event
  #
  # Example:
  #
  # Event.on 'stuff:received', (data)-> doSomethingWith(data)
  #
  @on: (event, fn)->
    $('body').bind event, (_, data) -> fn(data)

  # Public: trigger an event
  #
  # event - The name of the event
  # data  - data to pass along
  #
  # Example:
  #
  # Event.trigger 'stuff:received', data
  #
  @trigger: (event, data)->
    $('body').trigger(event, [data])

window.Event = Event

main.coffee

#= require dashboard/ajax
#= require dashboard/event
#= require dashboard/map_utils
#
#= require dashboard/tracker
#= require dashboard/reference_point

$ ->
  map = new Map()

  Event.on 'trackers:ready', (trackers)->
    Tracker.reset(map, trackers)

  Event.on 'trackers:filtered', (trackers)->
    Tracker.update(map, trackers)

  Tracker.fetch()

tracker.coffee

#= require dashboard/ajax
#= require dashboard/tracker_list

class Tracker
  @fetch: -> Ajax.getJSON "/current_positions", "trackers:ready"

  @reset: (map, trackers)->
    @trackers = trackers
    @updateUI(map, trackers)

  @update: (map, trackers)->
    @updateUI(map, trackers)

  @updateUI: (map, trackers)->
    TrackerList.update(trackers)

    for tracker in trackers
      map.show(@markerForTracker(tracker))

    toHide = _.difference(@trackers, trackers)
    $.each toHide, (_, tracker)->
      map.hide(@markerForTracker(tracker))

  @markerForTracker: (tracker)->
    if not tracker.marker
      label = tracker.name
      location = LatLng.of(tracker.most_recent_message)
      tracker.marker = createMarker location, label,
                        draggable: false,
                        raiseOnDrag: false
    tracker.marker

  @filter: (fn)->
    Event.trigger 'trackers:filtered', _.filter(@trackers, fn)

window.Tracker = Tracker

# Private: filter by name or uin
# Returns a function for use with _.filter
filterByString = (text)->
  search = new RegExp(text, 'i')
  (tracker)-> search.test(tracker.name) || search.test(tracker.uin)

# Private: filter by company
# Returns a function for use with _.filter
filterByCompany = (company)->
  (tracker)-> tracker.company == company

$ ->

  $('#search_filter').bind 'keyup', ->
    nameOrUIN = $(this).val()
    Tracker.filter(filterByString(nameOrUIN))

tracker_list.coffee

class TrackerList

  @update: (trackers)->
    conversion = (tracker)->
      id: tracker.uin,
      value: "#{tracker.name} - #{tracker.uin}"
    $('#trackers_list').setOptionsFromCollection(trackers, true, conversion)

window.TrackerList = TrackerList