net/systemeD/halcyon/connection/XMLConnection.as

   1 package net.systemeD.halcyon.connection {
   2
   3     import flash.events.*;
   4
   5         import flash.system.Security;
   6         import flash.net.*;
   7     import org.iotashan.oauth.*;
   8
   9
  10         public class XMLConnection extends Connection {
  11
  12         //public var readConnection:NetConnection;
  13
  14                 public function XMLConnection() {
  15
  16                         if (Connection.policyURL!='')
  17                 Security.loadPolicyFile(Connection.policyURL);
  18             var oauthPolicy:String = Connection.getParam("oauth_policy", "");
  19             if ( oauthPolicy != "" ) {
  20                 trace(oauthPolicy);
  21                 Security.loadPolicyFile(oauthPolicy);
  22             }
  23                 }
  24
  25                 override public function loadBbox(left:Number,right:Number,
  26                                                                 top:Number,bottom:Number):void {
  27             var mapVars:URLVariables = new URLVariables();
  28             mapVars.bbox= left+","+bottom+","+right+","+top;
  29
  30             var mapRequest:URLRequest = new URLRequest(Connection.apiBaseURL+"map");
  31             mapRequest.data = mapVars;
  32
  33             var mapLoader:URLLoader = new URLLoader();
  34             mapLoader.addEventListener(Event.COMPLETE, loadedMap);
  35             mapLoader.load(mapRequest);
  36             dispatchEvent(new Event(LOAD_STARTED));
  37                 }
  38
  39         private function parseTags(tagElements:XMLList):Object {
  40             var tags:Object = {};
  41             for each (var tagEl:XML in tagElements)
  42                 tags[tagEl.@k] = tagEl.@v;
  43             return tags;
  44         }
  45
  46         private function loadedMap(event:Event):void {
  47             dispatchEvent(new Event(LOAD_COMPLETED));
  48
  49             var map:XML = new XML(URLLoader(event.target).data);
  50             var id:Number;
  51             var version:uint;
  52             var tags:Object;
  53
  54             for each(var nodeData:XML in map.node) {
  55                 id = Number(nodeData.@id);
  56                 version = uint(nodeData.@version);
  57
  58                 var node:Node = getNode(id);
  59                 if ( node == null ) {
  60                     var lat:Number = Number(nodeData.@lat);
  61                     var lon:Number = Number(nodeData.@lon);
  62                     tags = parseTags(nodeData.tag);
  63                     setNode(new Node(id, version, tags, lat, lon));
  64                 }
  65             }
  66
  67             for each(var data:XML in map.way) {
  68                 id = Number(data.@id);
  69                 version = uint(data.@version);
  70
  71                 var way:Way = getWay(id);
  72                 if ( way == null ) {
  73                     var nodes:Array = [];
  74                     for each(var nd:XML in data.nd)
  75                         nodes.push(getNode(Number(nd.@ref)));
  76                     tags = parseTags(data.tag);
  77                     setWay(new Way(id, version, tags, nodes));
  78                 }
  79             }
  80         }
  81
  82         protected var appID:OAuthConsumer;
  83         protected var authToken:OAuthToken;
  84
  85             override public function setAppID(id:Object):void {
  86                 appID = OAuthConsumer(id);
  87             }
  88
  89             override public function setAuthToken(id:Object):void {
  90                 authToken = OAuthToken(id);
  91             }
  92
  93         private var httpStatus:int = 0;
  94
  95         private function recordStatus(event:HTTPStatusEvent):void {
  96             httpStatus = event.status;
  97         }
  98
  99         private var lastUploadedChangesetTags:Object;
 100
 101         override public function createChangeset(tags:Object):void {
 102             lastUploadedChangesetTags = tags;
 103
 104                 var changesetXML:XML = <osm version="0.6"><changeset /></osm>;
 105                 var changeset:XML = <changeset />;
 106                 for (var tagKey:Object in tags) {
 107               var tagXML:XML = <tag/>;
 108               tagXML.@k = tagKey;
 109               tagXML.@v = tags[tagKey];
 110               changesetXML.changeset.appendChild(tagXML);
 111             }
 112
 113             // make an OAuth query
 114             var sig:IOAuthSignatureMethod = new OAuthSignatureMethod_HMAC_SHA1();
 115             var url:String = Connection.apiBaseURL+"changeset/create";
 116             var params:Object = { _method: "PUT" };
 117             var oauthRequest:OAuthRequest = new OAuthRequest("POST", url, params, appID, authToken);
 118             var urlStr:Object = oauthRequest.buildRequest(sig, OAuthRequest.RESULT_TYPE_URL_STRING)
 119
 120             // build the actual request
 121             var urlReq:URLRequest = new URLRequest(String(urlStr));
 122             urlReq.method = "POST";
 123             urlReq.data = changesetXML.toXMLString();
 124             urlReq.contentType = "application/xml";
 125             var loader:URLLoader = new URLLoader();
 126             loader.addEventListener(Event.COMPLETE, changesetCreateComplete);
 127             loader.addEventListener(IOErrorEvent.IO_ERROR, changesetCreateError);
 128             loader.addEventListener(HTTPStatusEvent.HTTP_STATUS, recordStatus);
 129                 loader.load(urlReq);
 130             }
 131
 132         private function changesetCreateComplete(event:Event):void {
 133             // response should be a Number changeset id
 134             var id:Number = Number(URLLoader(event.target).data);
 135
 136             // which means we now have a new changeset!
 137             setActiveChangeset(new Changeset(id, lastUploadedChangesetTags));
 138         }
 139
 140         private function changesetCreateError(event:IOErrorEvent):void {
 141             dispatchEvent(new Event(NEW_CHANGESET_ERROR));
 142         }
 143
 144         override public function uploadChanges():void {
 145             var changeset:Changeset = getActiveChangeset();
 146             var upload:XML = <osmChange version="0.6"/>
 147             upload.appendChild(addCreated(changeset, getAllNodeIDs, getNode, serialiseNode));
 148             upload.appendChild(addCreated(changeset, getAllWayIDs, getWay, serialiseWay));
 149             upload.appendChild(addCreated(changeset, getAllRelationIDs, getRelation, serialiseRelation));
 150             upload.appendChild(addModified(changeset, getAllNodeIDs, getNode, serialiseNode));
 151             upload.appendChild(addModified(changeset, getAllWayIDs, getWay, serialiseWay));
 152             upload.appendChild(addModified(changeset, getAllRelationIDs, getRelation, serialiseRelation));
 153
 154             // *** TODO *** deleting items
 155
 156             // now actually upload them
 157             // make an OAuth query
 158             var sig:IOAuthSignatureMethod = new OAuthSignatureMethod_HMAC_SHA1();
 159             var url:String = Connection.apiBaseURL+"changeset/" + changeset.id + "/upload";
 160             var oauthRequest:OAuthRequest = new OAuthRequest("POST", url, null, appID, authToken);
 161             var urlStr:Object = oauthRequest.buildRequest(sig, OAuthRequest.RESULT_TYPE_URL_STRING)
 162
 163             // build the actual request
 164             var urlReq:URLRequest = new URLRequest(String(urlStr));
 165             urlReq.method = "POST";
 166             urlReq.data = upload.toXMLString();
 167             urlReq.contentType = "text/xml";
 168             var loader:URLLoader = new URLLoader();
 169             loader.addEventListener(Event.COMPLETE, diffUploadComplete);
 170             loader.addEventListener(IOErrorEvent.IO_ERROR, diffUploadError);
 171             loader.addEventListener(HTTPStatusEvent.HTTP_STATUS, recordStatus);
 172                 loader.load(urlReq);
 173
 174                 dispatchEvent(new Event(SAVE_STARTED));
 175         }
 176
 177         private function diffUploadComplete(event:Event):void {
 178             // response should be XML describing the progress
 179             var results:XML = new XML((URLLoader(event.target).data));
 180
 181             for each( var update:XML in results.child("*") ) {
 182                 var oldID:Number = Number(update.@old_id);
 183                 var newID:Number = Number(update.@new_id);
 184                 var version:uint = uint(update.@new_version);
 185                 var type:String = update.name();
 186
 187                 var entity:Entity;
 188                 if ( type == "node" ) entity = getNode(oldID);
 189                 else if ( type == "way" ) entity = getWay(oldID);
 190                 else if ( type == "relation" ) entity = getRelation(oldID);
 191                 entity.markClean(newID, version);
 192
 193                 // *** TODO *** handle renumbering of creates, and deleting
 194             }
 195
 196                 dispatchEvent(new SaveCompleteEvent(SAVE_COMPLETED, true));
 197         }
 198
 199         private function diffUploadError(event:IOErrorEvent):void {
 200             trace("error "+URLLoader(event.target).data + " "+httpStatus+ " " + event.text);
 201
 202                 dispatchEvent(new SaveCompleteEvent(SAVE_COMPLETED, false));
 203         }
 204
 205         private function addCreated(changeset:Changeset, getIDs:Function, get:Function, serialise:Function):XML {
 206             var create:XML = <create version="0.6"/>
 207             for each( var id:Number in getIDs() ) {
 208                 if ( id >= 0 )
 209                     continue;
 210
 211                 var entity:Object = get(id);
 212                 var xml:XML = serialise(entity);
 213                 xml.@changeset = changeset.id;
 214                 create.appendChild(xml);
 215             }
 216             return create.hasComplexContent() ? create : <!-- blank create section -->;
 217         }
 218
 219         private function addModified(changeset:Changeset, getIDs:Function, get:Function, serialise:Function):XML {
 220             var modify:XML = <modify version="0.6"/>
 221             for each( var id:Number in getIDs() ) {
 222                 var entity:Entity = get(id);
 223                 // creates are already included
 224                 if ( id < 0 || !entity.isDirty )
 225                     continue;
 226
 227                 var xml:XML = serialise(entity);
 228                 xml.@changeset = changeset.id;
 229                 modify.appendChild(xml);
 230             }
 231             return modify.hasComplexContent() ? modify : <!-- blank modify section -->;
 232         }
 233
 234         private function serialiseNode(node:Node):XML {
 235             var xml:XML = <node/>
 236             serialiseEntity(node, xml);
 237             xml.@lat = node.lat;
 238             xml.@lon = node.lon;
 239             return xml;
 240         }
 241
 242         private function serialiseWay(way:Way):XML {
 243             var xml:XML = <way/>
 244             serialiseEntity(way, xml);
 245             for ( var i:uint = 0; i < way.length; i++ ) {
 246                 var nd:XML = <nd/>
 247                 nd.@ref = way.getNode(i).id;
 248                 xml.appendChild(nd);
 249             }
 250             return xml;
 251         }
 252
 253         private function serialiseRelation(relation:Relation):XML {
 254             var xml:XML = <relation/>
 255             serialiseEntity(relation, xml);
 256             for ( var i:uint = 0; i < relation.length; i++ ) {
 257                 var relMember:RelationMember = relation.getMember(i);
 258                 var member:XML = <member/>
 259                 member.@ref = relMember.entity.id;
 260                 member.@type = relMember.entity.getType();
 261                 member.@role = relMember.role;
 262                 xml.appendChild(member);
 263             }
 264             return xml;
 265         }
 266
 267         private function serialiseEntity(entity:Entity, xml:XML):void {
 268             xml.@id = entity.id;
 269             xml.@version = entity.version;
 270             for each( var tag:Tag in entity.getTagArray() ) {
 271               var tagXML:XML = <tag/>
 272               tagXML.@k = tag.key;
 273               tagXML.@v = tag.value;
 274               xml.appendChild(tagXML);
 275             }
 276         }
 277         }
 278 }