Refactored tabletop methods

app/imports/api/tabletop/methods/shared/tabletopPermissions.js

@@ -0,0 +1,25 @@
+import Tabletops from '../../Tabletops.js';
+
+export function assertUserInTabletop(tabletopId, userId){
+  let tabletop = Tabletops.findOne(tabletopId);
+  if (!tabletop){
+    throw new Meteor.Error('Tabletop does not exist',
+    'No tabletop could be found for the given tabletop id');
+  }
+  if (tabletop.gameMaster !== userId && !tabletop.players.includes(userId)){
+    throw new Meteor.Error('Not in tabletop',
+    'The user is not the gamemaster or a player in the given tabletop');
+  }
+}
+
+export function assertUserIsTabletopOwner(tabletopId, userId){
+  let tabletop = Tabletops.findOne(tabletopId);
+  if (!tabletop){
+    throw new Meteor.Error('Tabletop does not exist',
+    'No tabletop could be found for the given tabletop id');
+  }
+  if (tabletop.gameMaster !== userId){
+    throw new Meteor.Error('Not the owner',
+    'The user is not the owner of the given tabletop');
+  }
+}