restore downloader script

src/downloader/downloader.ts

@@ -1,3 +1,34 @@
 document.addEventListener('DOMContentLoaded', () => {
-    // TODO
+    const isSafari = (typeof safari !== 'undefined') && navigator.userAgent.indexOf(' Safari/') !== -1 &&
+        navigator.userAgent.indexOf('Chrome') === -1;
+
+    if (!isSafari) {
+        return;
+    }
+
+    safari.self.addEventListener('message', (msgEvent: any) => {
+        // tslint:disable-next-line
+        console.log('GOT MESSAGE');
+        // tslint:disable-next-line
+        console.log(msgEvent);
+        doDownload(JSON.parse(msgEvent.message.msg));
+    }, false);
+
+    function doDownload(msg: any) {
+        if (msg.command === 'downloaderPageData' && msg.data) {
+            const blob = new Blob([msg.data.blobData], msg.data.blobOptions);
+            if (navigator.msSaveOrOpenBlob) {
+                navigator.msSaveBlob(blob, msg.data.fileName);
+            } else {
+                const a = document.createElement('a');
+                a.href = URL.createObjectURL(blob);
+                a.download = msg.data.fileName;
+                document.body.appendChild(a);
+                a.click();
+                document.body.removeChild(a);
+            }
+        }
+
+        window.setTimeout(() => window.close(), 1500);
+    }
 });