7c9b1a8aaeab1708a691cc0472de0ae852e93dfa
[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 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         public static var TRACES_LOADED:String = "traces_loaded";
86
87         // store the data we download
88         private var negativeID:Number = -1;
89         private var nodes:Object = {};
90         private var ways:Object = {};
91         private var relations:Object = {};
92         private var pois:Array = [];
93         private var changeset:Changeset = null;
94                 private var changesetUpdated:Number;
95                 private var modified:Boolean = false;
96                 public var nodecount:int=0;
97                 public var waycount:int=0;
98                 public var relationcount:int=0;
99         private var traces:Array = [];
100
101         protected function get nextNegative():Number {
102             return negativeID--;
103         }
104
105         protected function setNode(node:Node, queue:Boolean):void {
106                         if (!nodes[node.id]) { nodecount++; }
107             nodes[node.id] = node;
108             if (node.loaded) { sendEvent(new EntityEvent(NEW_NODE, node),queue); }
109         }
110
111         protected function setWay(way:Way, queue:Boolean):void {
112                         if (!ways[way.id]) { waycount++; }
113             ways[way.id] = way;
114             if (way.loaded) { sendEvent(new EntityEvent(NEW_WAY, way),queue); }
115         }
116
117         protected function setRelation(relation:Relation, queue:Boolean):void {
118                         if (!relations[relation.id]) { relationcount++; }
119             relations[relation.id] = relation;
120             if (relation.loaded) { sendEvent(new EntityEvent(NEW_RELATION, relation),queue); }
121         }
122
123         protected function renumberNode(oldID:Number, node:Node, queue:Boolean):void {
124             nodes[node.id] = node;
125             if (node.loaded) { sendEvent(new EntityRenumberedEvent(NODE_RENUMBERED, node, oldID),queue); }
126             delete nodes[oldID];
127         }
128
129         protected function renumberWay(oldID:Number, way:Way, queue:Boolean):void {
130             ways[way.id] = way;
131             if (way.loaded) { sendEvent(new EntityRenumberedEvent(WAY_RENUMBERED, way, oldID),queue); }
132             delete ways[oldID];
133         }
134
135         protected function renumberRelation(oldID:Number, relation:Relation, queue:Boolean):void {
136             relations[relation.id] = relation;
137             if (relation.loaded) { sendEvent(new EntityRenumberedEvent(RELATION_RENUMBERED, relation, oldID),queue); }
138             delete relations[oldID];
139         }
140
141
142                 public function sendEvent(e:*,queue:Boolean):void {
143                         // queue is only used for AMFConnection
144                         dispatchEvent(e);
145                 }
146
147         public function registerPOI(node:Node):void {
148             if ( pois.indexOf(node) < 0 ) {
149                 pois.push(node);
150                 sendEvent(new EntityEvent(NEW_POI, node),false);
151             }
152         }
153
154         public function unregisterPOI(node:Node):void {
155             var index:uint = pois.indexOf(node);
156             if ( index >= 0 ) {
157                 pois.splice(index,1);
158             }
159         }
160
161         public function getNode(id:Number):Node {
162             return nodes[id];
163         }
164
165         public function getWay(id:Number):Way {
166             return ways[id];
167         }
168
169         public function getRelation(id:Number):Relation {
170             return relations[id];
171         }
172
173                 // Remove data from Connection
174                 // These functions are used only internally to stop redundant data hanging around
175                 // (either because it's been deleted on the server, or because we have panned away
176                 //  and need to reduce memory usage)
177
178                 protected function killNode(id:Number):void {
179                         if (!nodes[id]) return;
180             nodes[id].dispatchEvent(new EntityEvent(Connection.NODE_DELETED, nodes[id]));
181                         if (nodes[id].parentRelations.length>0) {
182                                 nodes[id]=new Node(id,0,{},false,0,0);
183                         } else {
184                                 delete nodes[id];
185                         }
186                         nodecount--;
187                 }
188
189                 protected function killWay(id:Number):void {
190                         if (!ways[id]) return;
191             ways[id].dispatchEvent(new EntityEvent(Connection.WAY_DELETED, ways[id]));
192                         if (ways[id].parentRelations.length>0) {
193                                 ways[id]=new Way(id,0,{},false,[]);
194                         } else {
195                                 delete ways[id];
196                         }
197                         waycount--;
198                 }
199
200                 protected function killRelation(id:Number):void {
201                         if (!relations[id]) return;
202             relations[id].dispatchEvent(new EntityEvent(Connection.RELATION_DELETED, relations[id]));
203                         if (relations[id].parentRelations.length>0) {
204                                 relations[id]=new Relation(id,0,{},false,[]);
205                         } else {
206                                 delete relations[id];
207                         }
208                         relationcount--;
209                 }
210
211                 protected function killWayWithNodes(id:Number):void {
212                         var way:Way=ways[id];
213                         var node:Node;
214                         for (var i:uint=0; i<way.length; i++) {
215                                 node=way.getNode(i);
216                                 if (node.isDirty) { continue; }
217                                 if (node.parentWays.length>1) {
218                                         node.removeParent(way);
219                                 } else {
220                                         killNode(node.id);
221                                 }
222                         }
223                         killWay(id);
224                 }
225                 
226
227
228         public function createNode(tags:Object, lat:Number, lon:Number, performCreate:Function):Node {
229             var node:Node = new Node(nextNegative, 0, tags, true, lat, lon);
230             performCreate(new CreateEntityAction(node, setNode));
231                         //markDirty();
232             return node;
233         }
234
235         public function createWay(tags:Object, nodes:Array, performCreate:Function):Way {
236             var way:Way = new Way(nextNegative, 0, tags, true, nodes.concat());
237             performCreate(new CreateEntityAction(way, setWay));
238                         //markDirty();
239             return way;
240         }
241
242         public function createRelation(tags:Object, members:Array, performCreate:Function):Relation {
243             var relation:Relation = new Relation(nextNegative, 0, tags, true, members.concat());
244             performCreate(new CreateEntityAction(relation, setRelation));
245                         //markDirty();
246             return relation;
247         }
248
249         public function getAllNodeIDs():Array {
250             var list:Array = [];
251             for each (var node:Node in nodes)
252                 list.push(node.id);
253             return list;
254         }
255
256         public function getAllWayIDs():Array {
257             var list:Array = [];
258             for each (var way:Way in ways)
259                 list.push(way.id);
260             return list;
261         }
262
263         public function getAllRelationIDs():Array {
264             var list:Array = [];
265             for each (var relation:Relation in relations)
266                 list.push(relation.id);
267             return list;
268         }
269
270         public function getMatchingRelationIDs(match:Object):Array {
271             var list:Array = [];
272                         var ok:Boolean;
273             for each (var relation:Relation in relations) {
274                                 ok=true;
275                                 if (relation.deleted) { ok=false; }
276                                 for (var k:String in match) {
277                                         if (!relation.getTagsHash()[k] || relation.getTagsHash()[k]!=match[k]) { ok=false; }
278                                 }
279                                 if (ok) { list.push(relation.id); }
280                         }
281             return list;
282         }
283
284                 public function getObjectsByBbox(left:Number, right:Number, top:Number, bottom:Number):Object {
285                         var o:Object = { nodesInside: [], nodesOutside: [], waysInside: [], waysOutside: [] };
286                         for each (var way:Way in ways) {
287                                 if (way.within(left,right,top,bottom)) { o.waysInside.push(way); }
288                                                                   else { o.waysOutside.push(way); }
289                         }
290                         for each (var node:Node in nodes) {
291                                 if (node.within(left,right,top,bottom)) { o.nodesInside.push(node); }
292                                                                    else { o.nodesOutside.push(node); }
293                         }
294                         return o;
295                 }
296
297                 public function purgeOutside(left:Number, right:Number, top:Number, bottom:Number):void {
298                         return;
299                         // ** this doesn't work - WayUIs stick around.
300                         // ** should purge POIs and relations too
301                         for each (var way:Way in ways) {
302                                 if (!way.within(left,right,top,bottom) && !way.isDirty) {
303                                         killWayWithNodes(way.id);
304                                 }
305                         }
306                 }
307
308                 public function markDirty():void {
309             if (!modified) { dispatchEvent(new Event(DATA_DIRTY)); }
310                         modified=true;
311                 }
312                 public function markClean():void {
313             if (modified) { dispatchEvent(new Event(DATA_CLEAN)); }
314                         modified=false;
315                 }
316                 public function get isDirty():Boolean {
317                         return modified;
318                 }
319
320                 // Changeset tracking
321
322         protected function setActiveChangeset(changeset:Changeset):void {
323             this.changeset = changeset;
324                         changesetUpdated = new Date().getTime();
325             sendEvent(new EntityEvent(NEW_CHANGESET, changeset),false);
326         }
327
328                 protected function freshenActiveChangeset():void {
329                         changesetUpdated = new Date().getTime();
330                 }
331                 
332                 protected function closeActiveChangeset():void {
333                         changeset = null;
334                 }
335         
336         public function getActiveChangeset():Changeset {
337                         if (changeset && (new Date().getTime()) > (changesetUpdated+58*60*1000)) {
338                                 closeActiveChangeset();
339                         }
340             return changeset;
341         }
342
343         protected function addTrace(t:Object):void {
344             traces.push(t);
345         }
346
347         public function getTraces():Array {
348             return traces;
349         }
350
351         // these are functions that the Connection implementation is expected to
352         // provide. This class has some generic helpers for the implementation.
353                 public function loadBbox(left:Number, right:Number,
354                                                                 top:Number, bottom:Number):void {
355             }
356             
357             public function setAppID(id:Object):void {}
358             public function setAuthToken(id:Object):void {}
359             public function createChangeset(tags:Object):void {}
360                 public function closeChangeset():void {}
361             public function uploadChanges():void {}
362         public function fetchUserTraces():void {}
363     }
364
365 }
366