Remove export button if WITH_API is not enabled

#2938
https://github.com/wekan/wekan/issues/2938#issuecomment-589782402

client/components/boards/boardHeader.js

@@ -33,22 +33,6 @@ Template.boardMenuPopup.events({
   'click .js-card-settings': Popup.open('boardCardSettings'),
 });
 
-Template.boardMenuPopup.helpers({
-  exportUrl() {
-    const params = {
-      boardId: Session.get('currentBoard'),
-    };
-    const queryParams = {
-      authToken: Accounts._storedLoginToken(),
-    };
-    return FlowRouter.path('/api/boards/:boardId/export', params, queryParams);
-  },
-  exportFilename() {
-    const boardId = Session.get('currentBoard');
-    return `wekan-export-board-${boardId}.json`;
-  },
-});
-
 Template.boardChangeTitlePopup.events({
   submit(event, templateInstance) {
     const newTitle = templateInstance

client/components/sidebar/sidebar.jade

@@ -298,6 +298,7 @@ template(name="boardMenuPopup")
     if currentUser.isBoardAdmin
       hr
       ul.pop-over-list
+        if withApi
           li
             a(href="{{exportUrl}}", download="{{exportFilename}}")
               i.fa.fa-share-alt
@@ -326,6 +327,7 @@ template(name="boardMenuPopup")
   if isSandstorm
     hr
     ul.pop-over-list
+      if withApi
         li
           a(href="{{exportUrl}}", download="{{exportFilename}}")
             i.fa.fa-share-alt

client/components/sidebar/sidebar.js

@@ -215,7 +215,18 @@ Template.boardMenuPopup.events({
   'click .js-card-settings': Popup.open('boardCardSettings'),
 });
 
+
+Template.boardMenuPopup.onCreated(function () {
+  this.apiEnabled = new ReactiveVar(false);
+  Meteor.call('_isApiEnabled', (e, result) => {
+    this.apiEnabled.set(result)
+  })
+})
+
 Template.boardMenuPopup.helpers({
+  withApi() {
+    return Template.instance().apiEnabled.get()
+  },
   exportUrl() {
     const params = {
       boardId: Session.get('currentBoard'),

models/settings.js

@@ -198,6 +198,10 @@ if (Meteor.isServer) {
     return process.env.CAS_ENABLED === 'true';
   }
 
+  function isApiEnabled() {
+    return process.env.WITH_API === 'true';
+  }
+
   Meteor.methods({
     sendInvitation(emails, boards) {
       check(emails, [String]);
@@ -314,6 +318,10 @@ if (Meteor.isServer) {
       return isCasEnabled();
     },
 
+    _isApiEnabled() {
+      return isApiEnabled();
+    },
+
     // Gets all connection methods to use it in the Template
     getAuthenticationsEnabled() {
       return {