/bin/html/map/gridconfig/com.secondlife.agni.js

  1/**
  2* @license License and Terms of Use
  3*
  4* Copyright (c) 2011 SignpostMarv
  5* Copyright (c) 2010 Linden Research, Inc.
  6*
  7* Permission is hereby granted, free of charge, to any person obtaining a copy
  8* of this software and associated documentation files (the "Software"), to deal
  9* in the Software without restriction, including without limitation the rights
 10* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 11* copies of the Software, and to permit persons to whom the Software is
 12* furnished to do so, subject to the following conditions:
 13* 
 14* The above copyright notice and this permission notice shall be included in
 15* all copies or substantial portions of the Software.
 16* 
 17* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 18* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 19* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 20* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 21* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 22* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 23* THE SOFTWARE.
 24*/
 25(function(window, undefined){
 26	window['mapapi'] = window['mapapi'] || {};
 27	var
 28		document       = window['document'],
 29		mapapi         = window['mapapi'],
 30		IDBTransaction = window['IDBTransaction'],
 31		Date           = window['Date'],
 32		console        = window['console'],
 33		gridConfig     = mapapi['gridConfig'],
 34		tileSource     = mapapi['tileSource'],
 35		size           = mapapi['size'],
 36		gridPoint      = mapapi['gridPoint']
 37	;
 38
 39	mapapi['gridConfigs'] = mapapi['gridConfigs'] || {};
 40
 41	var SecondLifeTileSource = new tileSource({
 42		'copyright'       : 'Š 2007 - ' + (new Date).getFullYear() + ' Linden Lab',
 43		'label'           : 'Land & Objects',
 44		'maxZoom'         : 7,
 45		'backgroundColor' : '#1d475f'
 46	});
 47
 48//  This Function returns the appropriate image tile from the S3 storage site corresponding to the
 49//  input location and zoom level on the google map.
 50	SecondLifeTileSource['getTileURL'] = function(pos, zoom){
 51		var
 52			sl_zoom               = Math.floor(zoom + 1),
 53			regions_per_tile_edge = Math.pow(2, sl_zoom - 1),
 54			x                     = pos['x'],
 55			y                     = pos['y']
 56		;
 57		x -= x % regions_per_tile_edge;
 58		y -= y % regions_per_tile_edge; 
 59
 60		if(x < 0 || y < 0){
 61			return null;
 62		}
 63		return (
 64			[ // 2 hosts so that we get faster performance on clients with lots of bandwidth but possible browser limits on number of open files
 65				"http://map.secondlife.com.s3.amazonaws.com",
 66				"http://map.secondlife.com"
 67			][((x / regions_per_tile_edge) % 2)] //  Pick a server
 68			+ ["/map", sl_zoom, x, y, "objects.jpg"].join("-") //  Get image tiles from Amazon S3
 69		);
 70	}
 71
 72	var
 73		pos2region_pool = 0,
 74		region2pos_pool = 0,
 75		agni            = new gridConfig({
 76			'namespace'   : 'com.secondlife.agni',
 77			'vendor'      : 'Linden Lab',
 78			'name'        : 'Second Life',
 79			'description' : 'Linden Lab\'s Agni grid',
 80			'label'       : 'Agni',
 81			'size'        : new size(1048576, 1048576),
 82			'tileSources' : [
 83				SecondLifeTileSource
 84			],
 85			'maxZoom'     : 7,
 86			'pos2region'  : function(pos, success, fail){
 87				if(!(pos instanceof mapapi['gridPoint'])){
 88					throw 'Position should be an instance of mapapi.gridPoint';
 89				}
 90				function noIndexedDB(p, s, f){
 91					if(console != undefined){
 92						console.log('IndexedDB cache miss @ ' + Math.floor(p['x']) + ',' + Math.floor(p['y']));
 93					}
 94					var
 95						cachecheck = agni['apiCacheCheck']('pos2region', Math.floor(p['x']), Math.floor(p['y']));
 96					;
 97					if(cachecheck != undefined){
 98						if(s){
 99							s({'pos':p, 'region': cachecheck});
100						}
101						return;
102					}
103					var
104						script = document['createElement']('script'),
105						_var   = 'com_secondlife_agni_posToRegion_' + ((++pos2region_pool) + '')['replace'](/\d/g,function(a){ return 'ABCDEFGHIJ'[a]; })
106					;
107					function done(){
108						if(window[_var] == undefined){
109							if(f){
110								f('slurl.com API failed to load script variable');
111							}
112						}else if(window[_var]['error'] != undefined){
113							if(f){
114								f('slurl.com API call failed, perhaps your arguments were invalid');
115							}
116						}else{
117							var
118								region = window[_var] + ''
119							;
120							if(s){
121								s({'pos':p, 'region': region,'cache':false});
122							}
123							if(agni['IndexedDB']){
124								var
125									transaction = agni['IndexedDB']['transaction']('pos2region', IDBTransaction['READ_WRITE']),
126									objstore    = transaction['objectStore']('pos2region'),
127									req         = objstore['add']({
128										'pos'      : Math.floor(p['x']) + '_' + Math.floor(p['y']),
129										'region'   : region,
130										'l_region' : region['toLowerCase'](),
131										'cached'   : Math.floor(new Date()['getTime']() / 1000)
132									})
133								;
134								if(console != undefined){
135									req['onsuccess'] = function(){
136										console.log('IndexedDB cache write @ ' + Math.floor(p['x']) + ',' + Math.floor(p['y']) + ' for ' + region);
137									}
138								}
139							}
140							agni['APIcache']['pos2region'][Math.floor(p['x'])]                     = agni['APIcache']['pos2region'][Math.floor(p['x'])] || {};
141							agni['APIcache']['pos2region'][Math.floor(p['x'])][Math.floor(p['y'])] = window[_var] + '';
142							script['parentNode']['removeChild'](script);
143						}
144					}
145					script['onload'] = done;
146					script['onreadystatechange'] = function(){
147						if(script['readyState'] == 'complete' || script['readyState'] == 'loaded'){
148							done();
149						}
150					}
151					script['onerror'] = function(){
152						if(f){
153							f('Error with script loading the slurl.com API');
154						}
155						setTimeout(function(){
156							script['parentNode']['removeChild'](script);
157						},30000);
158					}
159					script['setAttribute']('src', 'http://slurl.com/get-region-name-by-coords?' + ['var=' + escape(_var), 'grid_x=' + escape(Math.floor(p['x'])), 'grid_y=' + escape(Math.floor(p['y']))].join('&'));
160					document['getElementsByTagName']('head')[0]['appendChild'](script);
161				}
162				if(agni['IndexedDB']){
163					var
164						index = agni['IndexedDB']['transaction']('pos2region')['objectStore']('pos2region')
165					;
166					index['get'](Math.floor(pos['x']) + '_' + Math.floor(pos['y']))['onsuccess'] = function(e){
167						if(e['target']['result']){
168							if(console != undefined){
169								console.log('IndexedDB cache hit @ ' + Math.floor(pos['x']) + ',' + Math.floor(pos['y']));
170							}
171							if(success){
172								success({'pos':pos, 'region':e['target']['result']['region'],'cache':'hit'});
173							}
174						}else{
175							noIndexedDB(pos, success, fail);
176						}
177					}
178				}else{
179					noIndexedDB(pos, success, fail);
180				}
181			},
182			'region2pos' : function(region, success, fail){
183				var
184					script = document['createElement']('script'),
185					_var   = 'com_secondlife_agni_regionTopos_' + ((++region2pos_pool) + '')['replace'](/\d/g,function(a){ return 'ABCDEFGHIJ'[a]; })
186				;
187				function noIndexedDB(r, s, f){
188					function done(){
189						if(window[_var] == undefined){
190							if(f){
191								f('slurl.com API failed to load script variable');
192							}
193						}else if(window[_var]['error'] != undefined){
194							if(f){
195								f('slurl.com API call failed, perhaps your arguments were invalid');
196							}
197						}else{
198							var
199								pos = window[_var]
200							;
201							if(s){
202								s({'pos':gridPoint['fuzzy'](pos), 'region': r, 'cache':false});
203							}
204							if(agni['IndexedDB']){
205								agni['pos2region'](pos);
206							}
207							script['parentNode']['removeChild'](script);
208						}
209					}
210					script['onload'] = done;
211					script['onreadystatechange'] = function(){
212						if(script['readyState'] == 'complete' || script['readyState'] == 'loaded'){
213							done();
214						}
215					}
216					script['onerror'] = function(){
217						if(f){
218							f('Error with script loading the slurl.com API');
219						}
220						setTimeout(function(){
221							script['parentNode']['removeChild'](script);
222						},30000);
223					}
224					script['setAttribute']('src', 'http://slurl.com/get-region-coords-by-name?' + ['var=' + escape(_var), 'sim_name=' + escape(r)].join('&'));
225					document['getElementsByTagName']('head')[0]['appendChild'](script);
226				}
227				if(agni['IndexedDB']){
228					var
229						req = agni['IndexedDB']['transaction']('pos2region')['objectStore']('pos2region')['index']('l_region')['get'](region['toLowerCase']())
230					;
231					req['onsuccess'] = function(e){
232						if(e['target']['result']){
233							if(console != undefined){
234								console.log('IndexedDB cache hit @ ' + region['toLowerCase']());
235							}
236							var
237								pos = e['target']['result']['pos']['split']('_')
238							;
239							if(success){
240								success({'pos':gridPoint['fuzzy']({'x':pos[0],'y':pos[1]}),'region':e['target']['result']['region'],'cache':'hit'})
241							}
242						}else{
243							noIndexedDB(region, success, fail);
244						}
245					}
246					req['onerror'] = function(e){
247						console.log('IndexedDB cache miss @ ' + region['toLowerCase']());
248						noIndexedDB(region, success, fail);
249					}
250				}else{
251					noIndexedDB(region, success, fail);
252				}
253			}
254		})
255	;
256
257	mapapi['gridConfigs']['com.secondlife.agni'] = agni;
258})(window);