net/systemeD/halcyon/connection/Connection.as

   1 package net.systemeD.halcyon.connection {
   2
   3     import flash.net.*;
   4
   5     import flash.events.EventDispatcher;
   6     import flash.events.Event;
   7
   8         public class Connection extends EventDispatcher {
   9
  10         private static var connectionInstance:Connection = null;
  11
  12         protected static var policyURL:String;
  13         protected static var apiBaseURL:String;
  14         protected static var params:Object;
  15
  16         public static function getConnection(initparams:Object=null):Connection {
  17             if ( connectionInstance == null ) {
  18
  19                 params = initparams == null ? new Object() : initparams;
  20                 policyURL = getParam("policy", "http://127.0.0.1:3000/api/crossdomain.xml");
  21                 apiBaseURL = getParam("api", "http://127.0.0.1:3000/api/0.6/");
  22                 var connectType:String = getParam("connection", "XML");
  23
  24                 if ( connectType == "XML" )
  25                     connectionInstance = new XMLConnection();
  26                 else
  27                     connectionInstance = new AMFConnection();
  28             }
  29             return connectionInstance;
  30         }
  31
  32         public static function getParam(name:String, defaultValue:String):String {
  33             trace("Returning param "+name+" as "+(params[name] == null ? defaultValue : params[name]));
  34             return params[name] == null ? defaultValue : params[name];
  35         }
  36
  37         public static function get apiBase():String {
  38             return apiBaseURL;
  39         }
  40
  41         public static function get serverName():String {
  42             return getParam("serverName", "Localhost");
  43         }
  44
  45                 public static function getConnectionInstance():Connection {
  46             return connectionInstance;
  47                 }
  48
  49                 public function getEnvironment(responder:Responder):void {}
  50
  51         // connection events
  52         public static var LOAD_STARTED:String = "load_started";
  53         public static var LOAD_COMPLETED:String = "load_completed";
  54         public static var SAVE_STARTED:String = "save_started";
  55         public static var SAVE_COMPLETED:String = "save_completed";
  56         public static var NEW_CHANGESET:String = "new_changeset";
  57         public static var NEW_CHANGESET_ERROR:String = "new_changeset_error";
  58         public static var NEW_NODE:String = "new_node";
  59         public static var NEW_WAY:String = "new_way";
  60         public static var NEW_RELATION:String = "new_relation";
  61         public static var NEW_POI:String = "new_poi";
  62         public static var TAG_CHANGE:String = "tag_change";
  63         public static var NODE_MOVED:String = "node_moved";
  64
  65         // store the data we download
  66         private var negativeID:Number = -1;
  67         private var nodes:Object = {};
  68         private var ways:Object = {};
  69         private var relations:Object = {};
  70         private var pois:Array = [];
  71         private var changeset:Changeset = null;
  72
  73         protected function get nextNegative():Number {
  74             return negativeID--;
  75         }
  76
  77         protected function setNode(node:Node):void {
  78             nodes[node.id] = node;
  79             dispatchEvent(new EntityEvent(NEW_NODE, node));
  80         }
  81
  82         protected function setWay(way:Way):void {
  83             ways[way.id] = way;
  84             dispatchEvent(new EntityEvent(NEW_WAY, way));
  85         }
  86
  87         protected function setRelation(relation:Relation):void {
  88             relations[relation.id] = relation;
  89             dispatchEvent(new EntityEvent(NEW_RELATION, relation));
  90         }
  91
  92         protected function registerPOI(node:Node):void {
  93             if ( pois.indexOf(node) < 0 ) {
  94                 pois.push(node);
  95                 dispatchEvent(new EntityEvent(NEW_POI, node));
  96             }
  97         }
  98
  99         protected function unregisterPOI(node:Node):void {
 100             var index:uint = pois.indexOf(node);
 101             if ( index >= 0 ) {
 102                 pois.splice(index,1);
 103             }
 104         }
 105
 106         protected function setActiveChangeset(changeset:Changeset):void {
 107             this.changeset = changeset;
 108             dispatchEvent(new EntityEvent(NEW_CHANGESET, changeset));
 109         }
 110
 111         public function getNode(id:Number):Node {
 112             return nodes[id];
 113         }
 114
 115         public function getWay(id:Number):Way {
 116             return ways[id];
 117         }
 118
 119         public function getRelation(id:Number):Relation {
 120             return relations[id];
 121         }
 122
 123         public function createNode(tags:Object, lat:Number, lon:Number):Node {
 124             var node:Node = new Node(nextNegative, 0, tags, lat, lon);
 125             setNode(node);
 126             return node;
 127         }
 128
 129         public function createWay(tags:Object, nodes:Array):Way {
 130             var way:Way = new Way(nextNegative, 0, tags, nodes.concat());
 131             setWay(way);
 132             return way;
 133         }
 134
 135         public function createRelation(tags:Object, members:Array):Relation {
 136             var relation:Relation = new Relation(nextNegative, 0, tags, members.concat());
 137             setRelation(relation);
 138             return relation;
 139         }
 140
 141         public function getAllNodeIDs():Array {
 142             var list:Array = [];
 143             for each (var node:Node in nodes)
 144                 list.push(node.id);
 145             return list;
 146         }
 147
 148         public function getAllWayIDs():Array {
 149             var list:Array = [];
 150             for each (var way:Way in ways)
 151                 list.push(way.id);
 152             return list;
 153         }
 154
 155         public function getAllRelationIDs():Array {
 156             var list:Array = [];
 157             for each (var relation:Relation in relations)
 158                 list.push(relation.id);
 159             return list;
 160         }
 161
 162         public function getActiveChangeset():Changeset {
 163             return changeset;
 164         }
 165
 166         // these are functions that the Connection implementation is expected to
 167         // provide. This class has some generic helpers for the implementation.
 168                 public function loadBbox(left:Number, right:Number,
 169                                                                 top:Number, bottom:Number):void {
 170             }
 171
 172             public function setAppID(id:Object):void {}
 173             public function setAuthToken(id:Object):void {}
 174             public function createChangeset(tags:Object):void {}
 175             public function uploadChanges():void {}
 176     }
 177
 178 }
 179