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("PUT", url, null, 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             urlReq.requestHeaders = new Array(new URLRequestHeader("X_HTTP_METHOD_OVERRIDE", "PUT"));
 126             var loader:URLLoader = new URLLoader();
 127             loader.addEventListener(Event.COMPLETE, changesetCreateComplete);
 128             loader.addEventListener(IOErrorEvent.IO_ERROR, changesetCreateError);
 129             loader.addEventListener(HTTPStatusEvent.HTTP_STATUS, recordStatus);
 130                 loader.load(urlReq);
 131             }
 132
 133         private function changesetCreateComplete(event:Event):void {
 134             // response should be a Number changeset id
 135             var id:Number = Number(URLLoader(event.target).data);
 136
 137             // which means we now have a new changeset!
 138             setActiveChangeset(new Changeset(id, lastUploadedChangesetTags));
 139         }
 140
 141         private function changesetCreateError(event:IOErrorEvent):void {
 142             dispatchEvent(new Event(NEW_CHANGESET_ERROR));
 143         }
 144
 145         override public function uploadChanges():void {
 146             var changeset:Changeset = getActiveChangeset();
 147             var upload:XML = <osmChange version="0.6"/>
 148             upload.appendChild(addCreated(changeset, getAllNodeIDs, getNode, serialiseNode));
 149             upload.appendChild(addCreated(changeset, getAllWayIDs, getWay, serialiseWay));
 150             upload.appendChild(addCreated(changeset, getAllRelationIDs, getRelation, serialiseRelation));
 151             upload.appendChild(addModified(changeset, getAllNodeIDs, getNode, serialiseNode));
 152             upload.appendChild(addModified(changeset, getAllWayIDs, getWay, serialiseWay));
 153             upload.appendChild(addModified(changeset, getAllRelationIDs, getRelation, serialiseRelation));
 154
 155             // *** TODO *** deleting items
 156
 157             // now actually upload them
 158             // make an OAuth query
 159             var sig:IOAuthSignatureMethod = new OAuthSignatureMethod_HMAC_SHA1();
 160             var url:String = Connection.apiBaseURL+"changeset/" + changeset.id + "/upload";
 161             var oauthRequest:OAuthRequest = new OAuthRequest("POST", url, null, appID, authToken);
 162             var urlStr:Object = oauthRequest.buildRequest(sig, OAuthRequest.RESULT_TYPE_URL_STRING)
 163
 164             // build the actual request
 165             var urlReq:URLRequest = new URLRequest(String(urlStr));
 166             urlReq.method = "POST";
 167             urlReq.data = upload.toXMLString();
 168             urlReq.contentType = "text/xml";
 169             var loader:URLLoader = new URLLoader();
 170             loader.addEventListener(Event.COMPLETE, diffUploadComplete);
 171             loader.addEventListener(IOErrorEvent.IO_ERROR, diffUploadError);
 172             loader.addEventListener(HTTPStatusEvent.HTTP_STATUS, recordStatus);
 173                 loader.load(urlReq);
 174
 175                 dispatchEvent(new Event(SAVE_STARTED));
 176         }
 177
 178         private function diffUploadComplete(event:Event):void {
 179             // response should be XML describing the progress
 180             var results:XML = new XML((URLLoader(event.target).data));
 181
 182             for each( var update:XML in results.child("*") ) {
 183                 var oldID:Number = Number(update.@old_id);
 184                 var newID:Number = Number(update.@new_id);
 185                 var version:uint = uint(update.@new_version);
 186                 var type:String = update.name();
 187
 188                 var entity:Entity;
 189                 if ( type == "node" ) entity = getNode(oldID);
 190                 else if ( type == "way" ) entity = getWay(oldID);
 191                 else if ( type == "relation" ) entity = getRelation(oldID);
 192                 entity.markClean(newID, version);
 193
 194                 // *** TODO *** handle renumbering of creates, and deleting
 195             }
 196
 197                 dispatchEvent(new SaveCompleteEvent(SAVE_COMPLETED, true));
 198         }
 199
 200         private function diffUploadError(event:IOErrorEvent):void {
 201             trace("error "+URLLoader(event.target).data + " "+httpStatus+ " " + event.text);
 202
 203                 dispatchEvent(new SaveCompleteEvent(SAVE_COMPLETED, false));
 204         }
 205
 206         private function addCreated(changeset:Changeset, getIDs:Function, get:Function, serialise:Function):XML {
 207             var create:XML = <create version="0.6"/>
 208             for each( var id:Number in getIDs() ) {
 209                 if ( id >= 0 )
 210                     continue;
 211
 212                 var entity:Object = get(id);
 213                 var xml:XML = serialise(entity);
 214                 xml.@changeset = changeset.id;
 215                 create.appendChild(xml);
 216             }
 217             return create.hasComplexContent() ? create : <!-- blank create section -->;
 218         }
 219
 220         private function addModified(changeset:Changeset, getIDs:Function, get:Function, serialise:Function):XML {
 221             var modify:XML = <modify version="0.6"/>
 222             for each( var id:Number in getIDs() ) {
 223                 var entity:Entity = get(id);
 224                 // creates are already included
 225                 if ( id < 0 || !entity.isDirty )
 226                     continue;
 227
 228                 var xml:XML = serialise(entity);
 229                 xml.@changeset = changeset.id;
 230                 modify.appendChild(xml);
 231             }
 232             return modify.hasComplexContent() ? modify : <!-- blank modify section -->;
 233         }
 234
 235         private function serialiseNode(node:Node):XML {
 236             var xml:XML = <node/>
 237             serialiseEntity(node, xml);
 238             xml.@lat = node.lat;
 239             xml.@lon = node.lon;
 240             return xml;
 241         }
 242
 243         private function serialiseWay(way:Way):XML {
 244             var xml:XML = <way/>
 245             serialiseEntity(way, xml);
 246             for ( var i:uint = 0; i < way.length; i++ ) {
 247                 var nd:XML = <nd/>
 248                 nd.@ref = way.getNode(i).id;
 249                 xml.appendChild(nd);
 250             }
 251             return xml;
 252         }
 253
 254         private function serialiseRelation(relation:Relation):XML {
 255             var xml:XML = <relation/>
 256             serialiseEntity(relation, xml);
 257             for ( var i:uint = 0; i < relation.length; i++ ) {
 258                 var relMember:RelationMember = relation.getMember(i);
 259                 var member:XML = <member/>
 260                 member.@ref = relMember.entity.id;
 261                 member.@type = relMember.entity.getType();
 262                 member.@role = relMember.role;
 263                 xml.appendChild(member);
 264             }
 265             return xml;
 266         }
 267
 268         private function serialiseEntity(entity:Entity, xml:XML):void {
 269             xml.@id = entity.id;
 270             xml.@version = entity.version;
 271             for each( var tag:Tag in entity.getTagArray() ) {
 272               var tagXML:XML = <tag/>
 273               tagXML.@k = tag.key;
 274               tagXML.@v = tag.value;
 275               xml.appendChild(tagXML);
 276             }
 277         }
 278         }
 279 }