Merge branch 'issue-82/zip' into 'develop'

Issue #82: FIX check for downloadable items before creating zipfile

See merge request !56

src/app/components/DownloadButton.js

@@ -6,6 +6,7 @@ export default function DownloadButton({id, objects}) {
 
     const handleDowloadCollection = (e) => {
         e.preventDefault();
+        var zip = false
 
         alert("Caso esta coleção contenha links externos, eles serão abertos em novas abas.\
  Talvez seja preciso permitir a abertura de várias abas nas opções do seu navegador!")
@@ -15,12 +16,17 @@ export default function DownloadButton({id, objects}) {
             if (object.collectionable.link !== null) {
                 let url = `https://api.portalmec.c3sl.ufpr.br/v1/learning_objects/${object.collectionable.id}/download`
                 window.open(url, '_blank');
+            } else {
+                // This means we have objects that are not links, so we should download them with a zipfile
+                zip = true
             }
         })
 
+        if (zip) {
             // Downloadable objects will get zipped and sent for download
             window.location = `https://api.portalmec.c3sl.ufpr.br/zipper/${id}`;
         }
+}
 
     return (