gistfile1.coffee

jQuery ->
  
  return unless $("#module-location-map").length > 0
  
  window.overlays = []
    
  # Setup Map
  options = {
    center: new google.maps.LatLng(34.1626653, -118.2518423),
    zoom: 3,
    mapTypeId: "Watercolor",
    panControl: true,
    panControlOptions: {
      position: google.maps.ControlPosition.TOP_RIGHT
    },
    zoomControl: true,
    zoomControlOptions: {
      style: google.maps.ZoomControlStyle.LARGE,
      position: google.maps.ControlPosition.TOP_RIGHT
    },
    
    # panControl: false,
    streetViewControl: false,
    mapTypeControlOptions: {
        mapTypeIds: []
    }
  }
  map = new google.maps.Map(document.getElementById("module-location-map"), options)
  
  # Map Type
  map.mapTypes.set("Toner", new google.maps.StamenMapType("toner"))
  map.mapTypes.set("Terrain", new google.maps.StamenMapType("terrain"))
  map.mapTypes.set("Watercolor", new google.maps.StamenMapType("watercolor"))
  
  $('a[target$="_blank"]').hide()    
  
  updateMarkers(map)
  

class Rect
  constructor: (@left, @right, @top, @bottom) ->

  intersects:(r2) ->
    not (r2.left > @right or r2.right < @left or r2.top > @bottom or r2.bottom < @top)

window.coalesceOverlays = ->
  
  # Find and map overlaps
  overlays = window.overlays
  overlaysHash = {}
  for overlay in overlays
    overlaysHash[overlay.user_id()] = overlay
    
  intersections = {}
  for overlay in overlays
    view = $(overlay.div_)
    
    # Find every other overlay that this intersects with
    for comparisonOverlay in _.without(overlays, overlay)
      if rectForOverlay(overlay).intersects(rectForOverlay(comparisonOverlay))
        overlay_id = overlay.user_id()
        comparison_overlay_id = comparisonOverlay.user_id()
        
        if intersections[overlay_id]?
          intersections[overlay_id].push comparison_overlay_id
        else
          intersections[overlay_id] = [comparison_overlay_id]
          
        if intersections[comparison_overlay_id]?
          intersections[comparison_overlay_id].push overlay_id
        else
          intersections[comparison_overlay_id] = [overlay_id]
        
        # haveIntersections.push overlay
        # haveIntersections.push comparisonOverlay
        
  # Uniq intersections
  for key, value of intersections
    intersections[key] = _.uniq(value)
  
  # Resolve overlaps
  for key, value of intersections
    masterOverlay = overlaysHash[key]
    for slave_id in value
      slave = overlaysHash[slave_id]
      masterOverlay.coalesceWithOverlay(slave)
      slave.hide()
      delete intersections[slave_id]
    delete intersections[key]


rectForOverlay = (overlay) ->
  view = $(overlay.div_)
  l = view.position().left
  t = view.position().top
  r = l + view.width()
  b = t + view.height()
  rect = new Rect(l, r, t, b)

updateMarkers = (map) ->
  
  console.log "update4234reweMarkers"
  
  
  url = $("#module-location").data("marker-url")
  $.getJSON url, (data) -> 

    bounds = new google.maps.LatLngBounds()

    # Set bounds
    for user in data
      ll = new google.maps.LatLng user.latitude.latitude, user.latitude.longitude
      bounds.extend ll
    map.fitBounds bounds
    map.setZoom 15 if map.getZoom() > 15
    map.panBy(100, 0)   
    
    # Clear overlays
    for overlay in window.overlays
      overlay.setMap(null)
    window.overlays = []
    
    # Markers
    for user in data
      person = user.latitude
      ll = new google.maps.LatLng person.latitude, person.longitude
      window.overlays.push new TxtOverlay(ll, person.marker, "google-map-html-overlay", map )
   
   # Update regularly
   window.setTimeout ->
     updateMarkers(map)
   , 10000