refactor EditController to make it stateful, and add addWayNodes functionality with...
[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
67         // store the data we download
68         private var negativeID:Number = -1;
69         private var nodes:Object = {};
70         private var ways:Object = {};
71         private var relations:Object = {};
72         private var pois:Array = [];
73         private var changeset:Changeset = null;
74
75         protected function get nextNegative():Number {
76             return negativeID--;
77         }
78
79         protected function setNode(node:Node):void {
80             nodes[node.id] = node;
81             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node)); }
82         }
83
84         protected function setWay(way:Way):void {
85             ways[way.id] = way;
86             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way)); }
87         }
88
89         protected function setRelation(relation:Relation):void {
90             relations[relation.id] = relation;
91             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation)); }
92         }
93
94         protected function renumberNode(oldID:Number, node:Node):void {
95             nodes[node.id] = node;
96             delete nodes[oldID];
97         }
98
99         protected function renumberWay(oldID:Number, way:Way):void {
100             ways[way.id] = way;
101             delete ways[oldID];
102         }
103
104         protected function renumberRelation(oldID:Number, relation:Relation):void {
105             relations[relation.id] = relation;
106             delete relations[oldID];
107         }
108
109                 public function sendEvent(e:*):void {
110                         dispatchEvent(e);
111                 }
112
113         protected function registerPOI(node:Node):void {
114             if ( pois.indexOf(node) < 0 ) {
115                 pois.push(node);
116                 sendEvent(new EntityEvent(NEW_POI, node));
117             }
118         }
119
120         protected function unregisterPOI(node:Node):void {
121             var index:uint = pois.indexOf(node);
122             if ( index >= 0 ) {
123                 pois.splice(index,1);
124             }
125         }
126
127         protected function setActiveChangeset(changeset:Changeset):void {
128             this.changeset = changeset;
129             sendEvent(new EntityEvent(NEW_CHANGESET, changeset));
130         }
131         
132         public function getNode(id:Number):Node {
133             return nodes[id];
134         }
135
136         public function getWay(id:Number):Way {
137             return ways[id];
138         }
139
140         public function getRelation(id:Number):Relation {
141             return relations[id];
142         }
143
144         public function createNode(tags:Object, lat:Number, lon:Number):Node {
145             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
146             setNode(node);
147             return node;
148         }
149
150         public function createWay(tags:Object, nodes:Array):Way {
151             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
152             setWay(way);
153             return way;
154         }
155
156         public function createRelation(tags:Object, members:Array):Relation {
157             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
158             setRelation(relation);
159             return relation;
160         }
161
162         public function getAllNodeIDs():Array {
163             var list:Array = [];
164             for each (var node:Node in nodes)
165                 list.push(node.id);
166             return list;
167         }
168
169         public function getAllWayIDs():Array {
170             var list:Array = [];
171             for each (var way:Way in ways)
172                 list.push(way.id);
173             return list;
174         }
175
176         public function getAllRelationIDs():Array {
177             var list:Array = [];
178             for each (var relation:Relation in relations)
179                 list.push(relation.id);
180             return list;
181         }
182
183         public function getActiveChangeset():Changeset {
184             return changeset;
185         }
186         
187         // these are functions that the Connection implementation is expected to
188         // provide. This class has some generic helpers for the implementation.
189                 public function loadBbox(left:Number, right:Number,
190                                                                 top:Number, bottom:Number):void {
191             }
192             
193             public function setAppID(id:Object):void {}
194             public function setAuthToken(id:Object):void {}
195             public function createChangeset(tags:Object):void {}
196             public function uploadChanges():void {}
197     }
198
199 }
200