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         import net.systemeD.halcyon.Globals;
   8
   9         public class Connection extends EventDispatcher {
  10
  11         private static var connectionInstance:Connection = null;
  12
  13         protected static var policyURL:String;
  14         protected static var apiBaseURL:String;
  15         protected static var params:Object;
  16
  17         public static function getConnection(initparams:Object=null):Connection {
  18             if ( connectionInstance == null ) {
  19
  20                 params = initparams == null ? new Object() : initparams;
  21                 policyURL = getParam("policy", "http://127.0.0.1:3000/api/crossdomain.xml");
  22                 apiBaseURL = getParam("api", "http://127.0.0.1:3000/api/0.6/");
  23                 var connectType:String = getParam("connection", "XML");
  24
  25                 if ( connectType == "XML" )
  26                     connectionInstance = new XMLConnection();
  27                 else
  28                     connectionInstance = new AMFConnection();
  29             }
  30             return connectionInstance;
  31         }
  32
  33         public static function getParam(name:String, defaultValue:String):String {
  34             trace("Returning param "+name+" as "+(params[name] == null ? defaultValue : params[name]));
  35             return params[name] == null ? defaultValue : params[name];
  36         }
  37
  38         public static function get apiBase():String {
  39             return apiBaseURL;
  40         }
  41
  42         public static function get serverName():String {
  43             return getParam("serverName", "Localhost");
  44         }
  45
  46                 public static function getConnectionInstance():Connection {
  47             return connectionInstance;
  48                 }
  49
  50                 public function getEnvironment(responder:Responder):void {}
  51
  52         // connection events
  53         public static var LOAD_STARTED:String = "load_started";
  54         public static var LOAD_COMPLETED:String = "load_completed";
  55         public static var SAVE_STARTED:String = "save_started";
  56         public static var SAVE_COMPLETED:String = "save_completed";
  57         public static var NEW_CHANGESET:String = "new_changeset";
  58         public static var NEW_CHANGESET_ERROR:String = "new_changeset_error";
  59         public static var NEW_NODE:String = "new_node";
  60         public static var NEW_WAY:String = "new_way";
  61         public static var NEW_RELATION:String = "new_relation";
  62         public static var NEW_POI:String = "new_poi";
  63         public static var NODE_RENUMBERED:String = "node_renumbered";
  64         public static var WAY_RENUMBERED:String = "way_renumbered";
  65         public static var RELATION_RENUMBERED:String = "relation_renumbered";
  66         public static var TAG_CHANGED:String = "tag_change";
  67         public static var NODE_MOVED:String = "node_moved";
  68         public static var WAY_NODE_ADDED:String = "way_node_added";
  69         public static var WAY_NODE_REMOVED:String = "way_node_removed";
  70                 public static var NODE_DELETED:String = "node_deleted";
  71                 public static var WAY_DELETED:String = "way_deleted";
  72                 public static var RELATION_DELETED:String = "relation_deleted";
  73                 public static var RELATION_MEMBER_ADDED:String = "relation_member_added";
  74                 public static var RELATION_MEMBER_REMOVED:String = "relation_member_deleted";
  75                 public static var ADDED_TO_RELATION:String = "added_to_relation";
  76                 public static var REMOVED_FROM_RELATION:String = "removed_from_relation";
  77                 public static var SUSPEND_REDRAW:String = "suspend_redraw";
  78                 public static var RESUME_REDRAW:String = "resume_redraw";
  79
  80         // store the data we download
  81         private var negativeID:Number = -1;
  82         private var nodes:Object = {};
  83         private var ways:Object = {};
  84         private var relations:Object = {};
  85         private var pois:Array = [];
  86         private var changeset:Changeset = null;
  87
  88         protected function get nextNegative():Number {
  89             return negativeID--;
  90         }
  91
  92         protected function setNode(node:Node, queue:Boolean):void {
  93             nodes[node.id] = node;
  94             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
  95         }
  96
  97         protected function setWay(way:Way, queue:Boolean):void {
  98             ways[way.id] = way;
  99             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
 100         }
 101
 102         protected function setRelation(relation:Relation, queue:Boolean):void {
 103             relations[relation.id] = relation;
 104             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
 105         }
 106
 107         protected function renumberNode(oldID:Number, node:Node, queue:Boolean):void {
 108             nodes[node.id] = node;
 109             if (node.loaded) { sendEvent(new EntityRenumberedEvent(NODE_RENUMBERED, node, oldID),queue); }
 110             delete nodes[oldID];
 111         }
 112
 113         protected function renumberWay(oldID:Number, way:Way, queue:Boolean):void {
 114             ways[way.id] = way;
 115             if (way.loaded) { sendEvent(new EntityRenumberedEvent(WAY_RENUMBERED, way, oldID),queue); }
 116             delete ways[oldID];
 117         }
 118
 119         protected function renumberRelation(oldID:Number, relation:Relation, queue:Boolean):void {
 120             relations[relation.id] = relation;
 121             if (relation.loaded) { sendEvent(new EntityRenumberedEvent(RELATION_RENUMBERED, relation, oldID),queue); }
 122             delete relations[oldID];
 123         }
 124
 125
 126                 public function sendEvent(e:*,queue:Boolean):void {
 127                         // queue is only used for AMFConnection
 128                         dispatchEvent(e);
 129                 }
 130
 131         public function registerPOI(node:Node):void {
 132             if ( pois.indexOf(node) < 0 ) {
 133                 pois.push(node);
 134                 sendEvent(new EntityEvent(NEW_POI, node),false);
 135             }
 136         }
 137
 138         public function unregisterPOI(node:Node):void {
 139             var index:uint = pois.indexOf(node);
 140             if ( index >= 0 ) {
 141                 pois.splice(index,1);
 142             }
 143         }
 144
 145         protected function setActiveChangeset(changeset:Changeset):void {
 146             this.changeset = changeset;
 147             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
 148         }
 149
 150         public function getNode(id:Number):Node {
 151             return nodes[id];
 152         }
 153
 154         public function getWay(id:Number):Way {
 155             return ways[id];
 156         }
 157
 158         public function getRelation(id:Number):Relation {
 159             return relations[id];
 160         }
 161
 162         public function createNode(tags:Object, lat:Number, lon:Number):Node {
 163             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
 164             setNode(node,false);
 165             return node;
 166         }
 167
 168         public function createWay(tags:Object, nodes:Array):Way {
 169             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
 170             setWay(way,false);
 171             return way;
 172         }
 173
 174         public function createRelation(tags:Object, members:Array):Relation {
 175             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
 176             setRelation(relation,false);
 177             return relation;
 178         }
 179
 180         public function getAllNodeIDs():Array {
 181             var list:Array = [];
 182             for each (var node:Node in nodes)
 183                 list.push(node.id);
 184             return list;
 185         }
 186
 187         public function getAllWayIDs():Array {
 188             var list:Array = [];
 189             for each (var way:Way in ways)
 190                 list.push(way.id);
 191             return list;
 192         }
 193
 194         public function getAllRelationIDs():Array {
 195             var list:Array = [];
 196             for each (var relation:Relation in relations)
 197                 list.push(relation.id);
 198             return list;
 199         }
 200
 201         public function getActiveChangeset():Changeset {
 202             return changeset;
 203         }
 204
 205         // these are functions that the Connection implementation is expected to
 206         // provide. This class has some generic helpers for the implementation.
 207                 public function loadBbox(left:Number, right:Number,
 208                                                                 top:Number, bottom:Number):void {
 209             }
 210
 211             public function setAppID(id:Object):void {}
 212             public function setAuthToken(id:Object):void {}
 213             public function createChangeset(tags:Object):void {}
 214             public function uploadChanges():void {}
 215     }
 216
 217 }
 218