1 files changed, 48 insertions, 0 deletions
diff --git a/catalog-ui/src/app/ng2/services/file-utils.service.ts b/catalog-ui/src/app/ng2/services/file-utils.service.ts
new file mode 100644
index 0000000000..57897492b0
--- /dev/null
+++ b/catalog-ui/src/app/ng2/services/file-utils.service.ts
@@ -0,0 +1,48 @@
+import { Injectable } from "@angular/core";
+import { WindowRef } from "./window.service";
+
+@Injectable()
+export class FileUtilsService {
+    constructor(private windowRef: WindowRef){}
+
+        public byteCharactersToBlob = (byteCharacters, contentType):any => {
+            contentType = contentType || '';
+            let sliceSize = 1024;
+            let bytesLength = byteCharacters.length;
+            let slicesCount = Math.ceil(bytesLength / sliceSize);
+            let byteArrays = new Array(slicesCount);
+
+            for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
+                let begin = sliceIndex * sliceSize;
+                let end = Math.min(begin + sliceSize, bytesLength);
+
+                let bytes = new Array(end - begin);
+                for (let offset = begin, i = 0; offset < end; ++i, ++offset) {
+                    bytes[i] = byteCharacters[offset].charCodeAt(0);
+                }
+                byteArrays[sliceIndex] = new Uint8Array(bytes);
+            }
+            return new Blob(byteArrays, {type: contentType});
+        };
+
+        public base64toBlob = (base64Data, contentType):any => {
+            let byteCharacters = atob(base64Data);
+            return this.byteCharactersToBlob(byteCharacters, contentType);
+        };
+
+        public downloadFile = (blob, fileName):void=> {
+            let url = this.windowRef.nativeWindow.URL.createObjectURL(blob);
+            let downloadLink = document.createElement("a");
+
+            downloadLink.setAttribute('href', url);
+            downloadLink.setAttribute('download', fileName);
+            document.body.appendChild(downloadLink);
+
+            var clickEvent = new MouseEvent("click", {
+                "view": window,
+                "bubbles": true,
+                "cancelable": true
+            });
+            downloadLink.dispatchEvent(clickEvent);
+        }
+}
+\ No newline at end of file