delete objects (possibly not complete)
[potlatch2.git] / 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_CHANGE: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
70         // store the data we download
71         private var negativeID:Number = -1;
72         private var nodes:Object = {};
73         private var ways:Object = {};
74         private var relations:Object = {};
75         private var pois:Array = [];
76         private var changeset:Changeset = null;
77
78         protected function get nextNegative():Number {
79             return negativeID--;
80         }
81
82         protected function setNode(node:Node,queue:Boolean):void {
83             nodes[node.id] = node;
84             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
85         }
86
87         protected function setWay(way:Way,queue:Boolean):void {
88             ways[way.id] = way;
89             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
90         }
91
92         protected function setRelation(relation:Relation,queue:Boolean):void {
93             relations[relation.id] = relation;
94             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
95         }
96
97         protected function renumberNode(oldID:Number, node:Node):void {
98             nodes[node.id] = node;
99             delete nodes[oldID];
100         }
101
102         protected function renumberWay(oldID:Number, way:Way):void {
103             ways[way.id] = way;
104             delete ways[oldID];
105         }
106
107         protected function renumberRelation(oldID:Number, relation:Relation):void {
108             relations[relation.id] = relation;
109             delete relations[oldID];
110         }
111
112
113                 public function sendEvent(e:*,queue:Boolean):void {
114                         // queue is only used for AMFConnection
115                         dispatchEvent(e);
116                 }
117
118         public function registerPOI(node:Node):void {
119             if ( pois.indexOf(node) < 0 ) {
120                 pois.push(node);
121                 sendEvent(new EntityEvent(NEW_POI, node),false);
122             }
123         }
124
125         protected function unregisterPOI(node:Node):void {
126             var index:uint = pois.indexOf(node);
127             if ( index >= 0 ) {
128                 pois.splice(index,1);
129             }
130         }
131
132         protected function setActiveChangeset(changeset:Changeset):void {
133             this.changeset = changeset;
134             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
135         }
136         
137         public function getNode(id:Number):Node {
138             return nodes[id];
139         }
140
141         public function getWay(id:Number):Way {
142             return ways[id];
143         }
144
145         public function getRelation(id:Number):Relation {
146             return relations[id];
147         }
148
149         public function createNode(tags:Object, lat:Number, lon:Number):Node {
150             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
151             setNode(node,false);
152             return node;
153         }
154
155         public function createWay(tags:Object, nodes:Array):Way {
156             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
157             setWay(way,false);
158             return way;
159         }
160
161         public function createRelation(tags:Object, members:Array):Relation {
162             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
163             setRelation(relation,false);
164             return relation;
165         }
166
167         public function getAllNodeIDs():Array {
168             var list:Array = [];
169             for each (var node:Node in nodes)
170                 list.push(node.id);
171             return list;
172         }
173
174         public function getAllWayIDs():Array {
175             var list:Array = [];
176             for each (var way:Way in ways)
177                 list.push(way.id);
178             return list;
179         }
180
181         public function getAllRelationIDs():Array {
182             var list:Array = [];
183             for each (var relation:Relation in relations)
184                 list.push(relation.id);
185             return list;
186         }
187
188         public function getActiveChangeset():Changeset {
189             return changeset;
190         }
191         
192         // these are functions that the Connection implementation is expected to
193         // provide. This class has some generic helpers for the implementation.
194                 public function loadBbox(left:Number, right:Number,
195                                                                 top:Number, bottom:Number):void {
196             }
197             
198             public function setAppID(id:Object):void {}
199             public function setAuthToken(id:Object):void {}
200             public function createChangeset(tags:Object):void {}
201             public function uploadChanges():void {}
202     }
203
204 }
205