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         import net.systemeD.halcyon.connection.actions.*;
   9
  10         public class Connection extends EventDispatcher {
  11
  12         private static var connectionInstance:Connection = null;
  13
  14         protected static var policyURL:String;
  15         protected static var apiBaseURL:String;
  16         protected static var params:Object;
  17
  18         public static function getConnection(initparams:Object=null):Connection {
  19             if ( connectionInstance == null ) {
  20
  21                 params = initparams == null ? new Object() : initparams;
  22                 policyURL = getParam("policy", "http://127.0.0.1:3000/api/crossdomain.xml");
  23                 apiBaseURL = getParam("api", "http://127.0.0.1:3000/api/0.6/");
  24                 var connectType:String = getParam("connection", "XML");
  25
  26                 if ( connectType == "XML" )
  27                     connectionInstance = new XMLConnection();
  28                 else if ( connectType == "OSM" )
  29                     connectionInstance = new OSMConnection();
  30                 else
  31                     connectionInstance = new AMFConnection();
  32             }
  33             return connectionInstance;
  34         }
  35
  36         public static function getParam(name:String, defaultValue:String):String {
  37             return params[name] == null ? defaultValue : params[name];
  38         }
  39
  40         public static function get apiBase():String {
  41             return apiBaseURL;
  42         }
  43
  44         public static function get serverName():String {
  45             return getParam("serverName", "Localhost");
  46         }
  47
  48                 public static function getConnectionInstance():Connection {
  49             return connectionInstance;
  50                 }
  51
  52                 public function getEnvironment(responder:Responder):void {}
  53
  54         // connection events
  55         public static var LOAD_STARTED:String = "load_started";
  56         public static var LOAD_COMPLETED:String = "load_completed";
  57         public static var SAVE_STARTED:String = "save_started";
  58         public static var SAVE_COMPLETED:String = "save_completed";
  59         public static var DATA_DIRTY:String = "data_dirty";
  60         public static var DATA_CLEAN:String = "data_clean";
  61         public static var NEW_CHANGESET:String = "new_changeset";
  62         public static var NEW_CHANGESET_ERROR:String = "new_changeset_error";
  63         public static var NEW_NODE:String = "new_node";
  64         public static var NEW_WAY:String = "new_way";
  65         public static var NEW_RELATION:String = "new_relation";
  66         public static var NEW_POI:String = "new_poi";
  67         public static var NODE_RENUMBERED:String = "node_renumbered";
  68         public static var WAY_RENUMBERED:String = "way_renumbered";
  69         public static var RELATION_RENUMBERED:String = "relation_renumbered";
  70         public static var TAG_CHANGED:String = "tag_change";
  71         public static var NODE_MOVED:String = "node_moved";
  72         public static var WAY_NODE_ADDED:String = "way_node_added";
  73         public static var WAY_NODE_REMOVED:String = "way_node_removed";
  74         public static var WAY_REORDERED:String = "way_reordered";
  75         public static var WAY_DRAGGED:String = "way_dragged";
  76                 public static var NODE_DELETED:String = "node_deleted";
  77                 public static var WAY_DELETED:String = "way_deleted";
  78                 public static var RELATION_DELETED:String = "relation_deleted";
  79                 public static var RELATION_MEMBER_ADDED:String = "relation_member_added";
  80                 public static var RELATION_MEMBER_REMOVED:String = "relation_member_deleted";
  81                 public static var ADDED_TO_RELATION:String = "added_to_relation";
  82                 public static var REMOVED_FROM_RELATION:String = "removed_from_relation";
  83                 public static var SUSPEND_REDRAW:String = "suspend_redraw";
  84                 public static var RESUME_REDRAW:String = "resume_redraw";
  85
  86         // store the data we download
  87         private var negativeID:Number = -1;
  88         private var nodes:Object = {};
  89         private var ways:Object = {};
  90         private var relations:Object = {};
  91         private var pois:Array = [];
  92         private var changeset:Changeset = null;
  93                 private var modified:Boolean = false;
  94                 public var nodecount:int=0;
  95                 public var waycount:int=0;
  96                 public var relationcount:int=0;
  97
  98         protected function get nextNegative():Number {
  99             return negativeID--;
 100         }
 101
 102         protected function setNode(node:Node, queue:Boolean):void {
 103                         if (!nodes[node.id]) { nodecount++; }
 104             nodes[node.id] = node;
 105             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
 106         }
 107
 108         protected function setWay(way:Way, queue:Boolean):void {
 109                         if (!ways[way.id]) { waycount++; }
 110             ways[way.id] = way;
 111             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
 112         }
 113
 114         protected function setRelation(relation:Relation, queue:Boolean):void {
 115                         if (!relations[relation.id]) { relationcount++; }
 116             relations[relation.id] = relation;
 117             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
 118         }
 119
 120         protected function renumberNode(oldID:Number, node:Node, queue:Boolean):void {
 121             nodes[node.id] = node;
 122             if (node.loaded) { sendEvent(new EntityRenumberedEvent(NODE_RENUMBERED, node, oldID),queue); }
 123             delete nodes[oldID];
 124         }
 125
 126         protected function renumberWay(oldID:Number, way:Way, queue:Boolean):void {
 127             ways[way.id] = way;
 128             if (way.loaded) { sendEvent(new EntityRenumberedEvent(WAY_RENUMBERED, way, oldID),queue); }
 129             delete ways[oldID];
 130         }
 131
 132         protected function renumberRelation(oldID:Number, relation:Relation, queue:Boolean):void {
 133             relations[relation.id] = relation;
 134             if (relation.loaded) { sendEvent(new EntityRenumberedEvent(RELATION_RENUMBERED, relation, oldID),queue); }
 135             delete relations[oldID];
 136         }
 137
 138
 139                 public function sendEvent(e:*,queue:Boolean):void {
 140                         // queue is only used for AMFConnection
 141                         dispatchEvent(e);
 142                 }
 143
 144         public function registerPOI(node:Node):void {
 145             if ( pois.indexOf(node) < 0 ) {
 146                 pois.push(node);
 147                 sendEvent(new EntityEvent(NEW_POI, node),false);
 148             }
 149         }
 150
 151         public function unregisterPOI(node:Node):void {
 152             var index:uint = pois.indexOf(node);
 153             if ( index >= 0 ) {
 154                 pois.splice(index,1);
 155             }
 156         }
 157
 158         protected function setActiveChangeset(changeset:Changeset):void {
 159             this.changeset = changeset;
 160             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
 161         }
 162
 163         public function getNode(id:Number):Node {
 164             return nodes[id];
 165         }
 166
 167         public function getWay(id:Number):Way {
 168             return ways[id];
 169         }
 170
 171         public function getRelation(id:Number):Relation {
 172             return relations[id];
 173         }
 174
 175                 // Remove data from Connection
 176                 // These functions are used only internally to stop redundant data hanging around
 177                 // (either because it's been deleted on the server, or because we have panned away
 178                 //  and need to reduce memory usage)
 179
 180                 protected function killNode(id:Number):void {
 181                         if (!nodes[id]) return;
 182             nodes[id].dispatchEvent(new EntityEvent(Connection.NODE_DELETED, nodes[id]));
 183                         if (nodes[id].parentRelations.length>0) {
 184                                 nodes[id]=new Node(id,0,{},false,0,0);
 185                         } else {
 186                                 delete nodes[id];
 187                         }
 188                         nodecount--;
 189                 }
 190
 191                 protected function killWay(id:Number):void {
 192                         if (!ways[id]) return;
 193             ways[id].dispatchEvent(new EntityEvent(Connection.WAY_DELETED, ways[id]));
 194                         if (ways[id].parentRelations.length>0) {
 195                                 ways[id]=new Way(id,0,{},false,[]);
 196                         } else {
 197                                 delete ways[id];
 198                         }
 199                         waycount--;
 200                 }
 201
 202                 protected function killRelation(id:Number):void {
 203                         if (!relations[id]) return;
 204             relations[id].dispatchEvent(new EntityEvent(Connection.RELATION_DELETED, relations[id]));
 205                         if (relations[id].parentRelations.length>0) {
 206                                 relations[id]=new Relation(id,0,{},false,[]);
 207                         } else {
 208                                 delete relations[id];
 209                         }
 210                         relationcount--;
 211                 }
 212
 213                 protected function killWayWithNodes(id:Number):void {
 214                         var way:Way=ways[id];
 215                         var node:Node;
 216                         for (var i:uint=0; i<way.length; i++) {
 217                                 node=way.getNode(i);
 218                                 if (node.isDirty) { continue; }
 219                                 if (node.parentWays.length>1) {
 220                                         node.removeParent(way);
 221                                 } else {
 222                                         killNode(node.id);
 223                                 }
 224                         }
 225                         killWay(id);
 226                 }
 227
 228
 229
 230         public function createNode(tags:Object, lat:Number, lon:Number, performCreate:Function):Node {
 231             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
 232             performCreate(new CreateEntityAction(node, setNode));
 233                         markDirty();
 234             return node;
 235         }
 236
 237         public function createWay(tags:Object, nodes:Array, performCreate:Function):Way {
 238             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
 239             performCreate(new CreateEntityAction(way, setWay));
 240                         markDirty();
 241             return way;
 242         }
 243
 244         public function createRelation(tags:Object, members:Array, performCreate:Function):Relation {
 245             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
 246             performCreate(new CreateEntityAction(relation, setRelation));
 247                         markDirty();
 248             return relation;
 249         }
 250
 251         public function getAllNodeIDs():Array {
 252             var list:Array = [];
 253             for each (var node:Node in nodes)
 254                 list.push(node.id);
 255             return list;
 256         }
 257
 258         public function getAllWayIDs():Array {
 259             var list:Array = [];
 260             for each (var way:Way in ways)
 261                 list.push(way.id);
 262             return list;
 263         }
 264
 265         public function getAllRelationIDs():Array {
 266             var list:Array = [];
 267             for each (var relation:Relation in relations)
 268                 list.push(relation.id);
 269             return list;
 270         }
 271
 272         public function getMatchingRelationIDs(match:Object):Array {
 273             var list:Array = [];
 274                         var ok:Boolean;
 275             for each (var relation:Relation in relations) {
 276                                 ok=true;
 277                                 if (relation.deleted) { ok=false; }
 278                                 for (var k:String in match) {
 279                                         if (!relation.getTagsHash()[k] || relation.getTagsHash()[k]!=match[k]) { ok=false; }
 280                                 }
 281                                 if (ok) { list.push(relation.id); }
 282                         }
 283             return list;
 284         }
 285
 286                 public function getObjectsByBbox(left:Number, right:Number, top:Number, bottom:Number):Object {
 287                         var o:Object = { poisInside: [], poisOutside: [], waysInside: [], waysOutside: [] };
 288                         for each (var way:Way in ways) {
 289                                 if (way.within(left,right,top,bottom)) { o.waysInside.push(way); }
 290                                                                   else { o.waysOutside.push(way); }
 291                         }
 292                         for each (var node:Node in nodes) {
 293                                 if (!node.hasParentWays) {
 294                                         if (node.within(left,right,top,bottom)) { o.poisInside.push(node); }
 295                                                                            else { o.poisOutside.push(node); }
 296                                 }
 297                         }
 298                         return o;
 299                 }
 300
 301         public function getActiveChangeset():Changeset {
 302             return changeset;
 303         }
 304
 305                 public function purgeOutside(left:Number, right:Number, top:Number, bottom:Number):void {
 306                         for each (var way:Way in ways) {
 307                                 if (!way.within(left,right,top,bottom) && !way.isDirty) {
 308                                         killWayWithNodes(way.id);
 309                                 }
 310                         }
 311                         // ** should purge POIs and relations too
 312                 }
 313
 314                 public function markDirty():void {
 315             if (!modified) { dispatchEvent(new Event(DATA_DIRTY)); }
 316                         modified=true;
 317                 }
 318                 public function markClean():void {
 319             if (modified) { dispatchEvent(new Event(DATA_CLEAN)); }
 320                         modified=false;
 321                 }
 322                 public function get isDirty():Boolean {
 323                         return modified;
 324                 }
 325
 326         // these are functions that the Connection implementation is expected to
 327         // provide. This class has some generic helpers for the implementation.
 328                 public function loadBbox(left:Number, right:Number,
 329                                                                 top:Number, bottom:Number):void {
 330             }
 331
 332             public function setAppID(id:Object):void {}
 333             public function setAuthToken(id:Object):void {}
 334             public function createChangeset(tags:Object):void {}
 335             public function uploadChanges():void {}
 336     }
 337
 338 }
 339