Check subsetting based on new born property

Also cleans up a lot of filtering logic

src/public/js/burning.js

@@ -1937,56 +1937,30 @@ function calculateAge($scope){
   $scope.age = age;
 }
 
+function isSubsetting(setting) { return !Object.values(setting).some((lp) => lp.born); }
+
 function calculateSettingNames($scope, burningData){
-  var settingNames = null;
+  let stockSettings = burningData.lifepaths[$scope.stock];
+  $scope.settingNames = Object.keys(stockSettings);
 
   var lastCurrentSetting = $scope.currentSetting;
 
-  if ( ! $scope.enforceLifepathReqts ) {
-    // Display all settings and subsettings
-    settingNames = [];
-    for(key in burningData.lifepaths[$scope.stock]){
-      settingNames.push(key);
-    }
-  }
-  else if ( $scope.selectedLifepaths.length == 0 ){
-    // All settings are allowed. Subsettings have no Born lifepath so don't include them.
-    settingNames = [];
-    for(key in burningData.lifepaths[$scope.stock]){
-      if( key.toLowerCase().indexOf("subsetting") < 0 ){
-        settingNames.push(key);
-      }
+  if ($scope.enforceLifepathReqts){
+    if ( $scope.selectedLifepaths.length == 0 ){
+      // All settings are allowed. Subsettings have no Born lifepath so don't include them.
+      $scope.settingNames = $scope.settingNames.filter(s => !isSubsetting(stockSettings[s]));
     }
-  }
-  else {
-    // Only settings that are leads from the last lifepath are allowed
-    var lastLifepath = $scope.selectedLifepaths[$scope.selectedLifepaths.length-1];
-    settingNames = [];
-    var all = Object.keys(burningData.lifepaths[$scope.stock]);
-    for(var i = 0; i < all.length; i++){
-      //console.log("calculateSettingNames: checking if '"+all[i]+"' is allowed");
-      var setting = all[i];
-
-      if ( lastLifepath.setting == setting ){
-        settingNames.push(setting);
-        continue;
-      }
-
-      if ( lastLifepath.leads ){
-        for(var j = 0; j < lastLifepath.keyLeads.length; j++){
-          var lead = lastLifepath.keyLeads[j];
-          //console.log("calculateSettingNames:   checking lead: '"+lead+"' is allowed");
+    else {
+      // Only settings that are leads from the last lifepath are allowed
+      var lastLifepath = $scope.selectedLifepaths[$scope.selectedLifepaths.length-1];
 
-          if( setting == lead ){
-            settingNames.push(setting);
-          }
-        }
-      }
+      // Doing this filtering instead of something like [lastLifepath.setting, ...lastLifepath.leads]
+      // accomplishes two things: only presents settings present in this server and maintains relative order.
+      $scope.settingNames = $scope.settingNames.filter(s => s == lastLifepath.setting
+        || (lastLifepath.leads && lastLifepath.leads.includes(s)));
     }
   }
 
-  $scope.settingNames = settingNames;
-
   var currentSettingNeedsUpdate = true;
   for(var i = 0; i < $scope.settingNames.length; i++){
     if( $scope.settingNames[i] == lastCurrentSetting){