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