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_CHANGED:String = "tag_change";
  63         public static var NODE_MOVED:String = "node_moved";
  64         public static var WAY_NODE_ADDED:String = "way_node_added";
  65         public static var WAY_NODE_REMOVED:String = "way_node_removed";
  66                 public static var NODE_DELETED:String = "node_deleted";
  67                 public static var WAY_DELETED:String = "way_deleted";
  68                 public static var RELATION_DELETED:String = "relation_deleted";
  69                 public static var RELATION_MEMBER_ADDED:String = "relation_member_added";
  70                 public static var RELATION_MEMBER_REMOVED:String = "relation_member_deleted";
  71                 public static var ADDED_TO_RELATION:String = "added_to_relation";
  72                 public static var REMOVED_FROM_RELATION:String = "removed_from_relation";
  73                 public static var SUSPEND_REDRAW:String = "suspend_redraw";
  74                 public static var RESUME_REDRAW:String = "resume_redraw";
  75
  76         // store the data we download
  77         private var negativeID:Number = -1;
  78         private var nodes:Object = {};
  79         private var ways:Object = {};
  80         private var relations:Object = {};
  81         private var pois:Array = [];
  82         private var changeset:Changeset = null;
  83
  84         protected function get nextNegative():Number {
  85             return negativeID--;
  86         }
  87
  88         protected function setNode(node:Node,queue:Boolean):void {
  89             nodes[node.id] = node;
  90             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
  91         }
  92
  93         protected function setWay(way:Way,queue:Boolean):void {
  94             ways[way.id] = way;
  95             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
  96         }
  97
  98         protected function setRelation(relation:Relation,queue:Boolean):void {
  99             relations[relation.id] = relation;
 100             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
 101         }
 102
 103         protected function renumberNode(oldID:Number, node:Node):void {
 104             nodes[node.id] = node;
 105             delete nodes[oldID];
 106         }
 107
 108         protected function renumberWay(oldID:Number, way:Way):void {
 109             ways[way.id] = way;
 110             delete ways[oldID];
 111         }
 112
 113         protected function renumberRelation(oldID:Number, relation:Relation):void {
 114             relations[relation.id] = relation;
 115             delete relations[oldID];
 116         }
 117
 118
 119                 public function sendEvent(e:*,queue:Boolean):void {
 120                         // queue is only used for AMFConnection
 121                         dispatchEvent(e);
 122                 }
 123
 124         public function registerPOI(node:Node):void {
 125             if ( pois.indexOf(node) < 0 ) {
 126                 pois.push(node);
 127                 sendEvent(new EntityEvent(NEW_POI, node),false);
 128             }
 129         }
 130
 131         protected function unregisterPOI(node:Node):void {
 132             var index:uint = pois.indexOf(node);
 133             if ( index >= 0 ) {
 134                 pois.splice(index,1);
 135             }
 136         }
 137
 138         protected function setActiveChangeset(changeset:Changeset):void {
 139             this.changeset = changeset;
 140             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
 141         }
 142
 143         public function getNode(id:Number):Node {
 144             return nodes[id];
 145         }
 146
 147         public function getWay(id:Number):Way {
 148             return ways[id];
 149         }
 150
 151         public function getRelation(id:Number):Relation {
 152             return relations[id];
 153         }
 154
 155         public function createNode(tags:Object, lat:Number, lon:Number):Node {
 156             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
 157             setNode(node,false);
 158             return node;
 159         }
 160
 161         public function createWay(tags:Object, nodes:Array):Way {
 162             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
 163             setWay(way,false);
 164             return way;
 165         }
 166
 167         public function createRelation(tags:Object, members:Array):Relation {
 168             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
 169             setRelation(relation,false);
 170             return relation;
 171         }
 172
 173         public function getAllNodeIDs():Array {
 174             var list:Array = [];
 175             for each (var node:Node in nodes)
 176                 list.push(node.id);
 177             return list;
 178         }
 179
 180         public function getAllWayIDs():Array {
 181             var list:Array = [];
 182             for each (var way:Way in ways)
 183                 list.push(way.id);
 184             return list;
 185         }
 186
 187         public function getAllRelationIDs():Array {
 188             var list:Array = [];
 189             for each (var relation:Relation in relations)
 190                 list.push(relation.id);
 191             return list;
 192         }
 193
 194         public function getActiveChangeset():Changeset {
 195             return changeset;
 196         }
 197
 198         // these are functions that the Connection implementation is expected to
 199         // provide. This class has some generic helpers for the implementation.
 200                 public function loadBbox(left:Number, right:Number,
 201                                                                 top:Number, bottom:Number):void {
 202             }
 203
 204             public function setAppID(id:Object):void {}
 205             public function setAuthToken(id:Object):void {}
 206             public function createChangeset(tags:Object):void {}
 207             public function uploadChanges():void {}
 208     }
 209
 210 }
 211