board export now checks authentication

models/boards.js

@@ -79,6 +79,33 @@ Boards.attachSchema(new SimpleSchema({
 
 
 Boards.helpers({
+  /**
+   * Is current logged-in user authorized to view this board?
+   */
+  isVisibleByUser() {
+    if(this.isPublic()) {
+      // public boards are visible to everyone
+      return true;
+    } else {
+      // otherwise you have to be logged-in and active member
+      return this.isActiveMember(Meteor.userId());
+    }
+  },
+
+  /**
+   * Is the user one of the active members of the board?
+   *
+   * @param userId
+   * @returns {boolean} the member that matches, or undefined/false
+   */
+  isActiveMember(userId) {
+    if(userId) {
+      return this.members.find((member) => (member.userId === userId && member.isActive));
+    } else {
+      return false;
+    }
+  },
+
   isPublic() {
     return this.permission === 'public';
   },