refactor node stateClasses and stylelist calculation
[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         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 = { nodesInside: [], nodesOutside: [], 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.within(left,right,top,bottom)) { o.nodesInside.push(node); }
294                                                                    else { o.nodesOutside.push(node); }
295                         }
296                         return o;
297                 }
298
299         public function getActiveChangeset():Changeset {
300             return changeset;
301         }
302         
303                 public function purgeOutside(left:Number, right:Number, top:Number, bottom:Number):void {
304                         return;
305                         // ** this doesn't work - WayUIs stick around.
306                         // ** should purge POIs and relations too
307                         for each (var way:Way in ways) {
308                                 if (!way.within(left,right,top,bottom) && !way.isDirty) {
309                                         killWayWithNodes(way.id);
310                                 }
311                         }
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