add some initialisation for deciding if to use detected tile params or those embedded in the code

console warnings when it fails to detect values from stock, or the internal defaults don't match
disable show-more-portals plugin if it would result in more requests - damn niantic!

code/boot.js

@@ -591,6 +591,7 @@ function boot() {
   window.setupTaphold();
   window.setupStyles();
   window.setupDialogs();
+  window.setupDataTileParams();
   window.setupMap();
   window.setupOMS();
   window.search.setup();

code/map_data_calc_tools.js

@@ -10,22 +10,69 @@
 // http://wiki.openstreetmap.org/wiki/Slippy_map_tilenames
 
 
+window.setupDataTileParams = function() {
+  // default values - used to fall back to if we can't detect those used in stock intel
+  var DEFAULT_ZOOM_TO_TILES_PER_EDGE = [256, 256, 256, 256, 512, 512, 512, 2048, 2048, 2048, 4096, 4096, 6500, 6500, 6500, 18e3, 18e3, 36e3];
+  var DEFAULT_ZOOM_TO_LEVEL = [ 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1 ];
+
+
+  window.TILE_PARAMS = {};
+
+  if (niantic_params.ZOOM_TO_LEVEL && niantic_params.TILES_PER_EDGE) {
+    window.TILE_PARAMS.ZOOM_TO_LEVEL = niantic_params.ZOOM_TO_LEVEL;
+    window.TILE_PARAMS.TILES_PER_EDGE = niantic_params.TILES_PER_EDGE;
+
+
+    // lazy numerical array comparison
+    if ( JSON.stringify(niantic_params.ZOOM_TO_LEVEL) != JSON.stringify(DEFAULT_ZOOM_TO_LEVEL)) {
+      console.warn('Tile parameter ZOOM_TO_LEVEL have changed in stock intel. Detectec correct values, but code should be updated');
+      debugger;
+    }
+    if ( JSON.stringify(niantic_params.TILES_PER_EDGE) != JSON.stringify(DEFAULT_ZOOM_TO_TILES_PER_EDGE)) {
+      console.warn('Tile parameter ZOOM_TO_LEVEL have changed in stock intel. Detectec correct values, but code should be updated');
+      debugger;
+    }
+
+  } else {
+    console.warn('Failed to detect both ZOOM_TO_LEVEL and TILES_PER_EDGE in the stock intel site - using internal defaults');
+    debugger;
+
+    window.TILE_PARAMS.ZOOM_TO_LEVEL = DEFAULT_ZOOM_TO_LEVEL;
+    window.TILE_PARAMS.TILES_PER_EDGE = DEFAULT_ZOOM_TO_TILES_PER_EDGE;
+  }
+
+  // disable SHOW_MORE_PORTALS if it would be unfriendly to the servers (i.e. result in more requests)
+  // needs to be fired a bit later, after plugins have been initialised
+  setTimeout(function(){
+    if (window.CONFIG_ZOOM_SHOW_MORE_PORTALS) {
+      if (window.TILE_PARAMS.TILES_PER_EDGE[17] > window.TILE_PARAMS.TILES_PER_EDGE[15]) {
+        var edgeScale = window.TILE_PARAMS.TILES_PER_EDGE[17]/window.TILE_PARAMS.TILES_PER_EDGE[15];
+        var mapScale = edgeScale*edgeScale;
+
+        dialog({
+          title: 'Show more portals plugin disabled',
+          width: 400,
+          text: 'The "show-more-portals" plugin has been disabled.\n\n'
+               +'Niantic have changed the intel site so that zoom level 17 (all portals) now needs '+mapScale+' times more requests than level 15 (L1+ portals), so fetching at the wrong zoom level will be unfriendly to the servers\n\n'
+        });
+
+        window.CONFIG_ZOOM_SHOW_MORE_PORTALS=false;
+      }
+    }
+  }, 1);
+
+}
+
+
 
 window.getMapZoomTileParameters = function(zoom) {
 
-  var ZOOM_TO_TILES_PER_EDGE = [256, 256, 256, 256, 512, 512, 512, 2048, 2048, 2048, 4096, 4096, 6500, 6500, 6500, 18e3, 18e3, 36e3];
-  var ZOOM_TO_LEVEL = [ 8, 8, 8, 8, 7, 7, 7, 6, 6, 5, 4, 4, 3, 2, 2, 1, 1 ];
 
-  if (niantic_params.ZOOM_TO_LEVEL && niantic_params.TILES_PER_EDGE) {
+  // the current API allows the client to request a minimum portal level. the window.TILE_PARAMS.ZOOM_TO_LEVEL list are minimums
-    ZOOM_TO_LEVEL = niantic_params.ZOOM_TO_LEVEL;
-    ZOOM_TO_TILES_PER_EDGE = niantic_params.TILES_PER_EDGE;
-  }
-
-  // the current API allows the client to request a minimum portal level. the ZOOM_TO_LEVEL list are minimums
   // however, in my view, this can return excessive numbers of portals in many cases. let's try an optional reduction
   // of detail level at some zoom levels
 
-  var level = ZOOM_TO_LEVEL[zoom] || 0;  // default to level 0 (all portals) if not in array
+  var level = window.TILE_PARAMS.ZOOM_TO_LEVEL[zoom] || 0;  // default to level 0 (all portals) if not in array
 
   if (window.CONFIG_ZOOM_SHOW_LESS_PORTALS_ZOOMED_OUT) {
     if (level <= 7 && level >= 4) {
@@ -34,12 +81,12 @@ window.getMapZoomTileParameters = function(zoom) {
     }
   }
 
-  var maxTilesPerEdge = ZOOM_TO_TILES_PER_EDGE[ZOOM_TO_TILES_PER_EDGE.length-1];
+  var maxTilesPerEdge = window.TILE_PARAMS.TILES_PER_EDGE[window.TILE_PARAMS.TILES_PER_EDGE.length-1];
 
   return {
     level: level,
-    maxLevel: ZOOM_TO_LEVEL[zoom] || 0,  // for reference, for log purposes, etc
+    maxLevel: window.TILE_PARAMS.ZOOM_TO_LEVEL[zoom] || 0,  // for reference, for log purposes, etc
-    tilesPerEdge: ZOOM_TO_TILES_PER_EDGE[zoom] || maxTilesPerEdge,
+    tilesPerEdge: window.TILE_PARAMS.TILES_PER_EDGE[zoom] || maxTilesPerEdge,
     zoom: zoom  // include the zoom level, for reference
   };
 }
@@ -48,7 +95,7 @@ window.getMapZoomTileParameters = function(zoom) {
 window.getDataZoomForMapZoom = function(zoom) {
   // we can fetch data at a zoom level different to the map zoom.
 
-  //NOTE: the specifics of this are tightly coupled with the above ZOOM_TO_LEVEL and ZOOM_TO_TILES_PER_EDGE arrays
+  //NOTE: the specifics of this are tightly coupled with the above ZOOM_TO_LEVEL and TILES_PER_EDGE arrays
 
   // firstly, some of IITCs zoom levels, depending on base map layer, can be higher than stock. limit zoom level
   // (stock site max zoom may vary depending on google maps detail in the area - 20 or 21 max is common)