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-rw-r--r--catalog-ui/src/app/utils/file-utils.ts51
1 files changed, 51 insertions, 0 deletions
diff --git a/catalog-ui/src/app/utils/file-utils.ts b/catalog-ui/src/app/utils/file-utils.ts
new file mode 100644
index 0000000000..d8c18229c3
--- /dev/null
+++ b/catalog-ui/src/app/utils/file-utils.ts
@@ -0,0 +1,51 @@
+export class FileUtils {
+
+ static '$inject' = [
+ '$window'
+ ];
+
+ constructor(private $window:any) {
+ }
+
+ public byteCharactersToBlob = (byteCharacters, contentType):any => {
+ contentType = contentType || '';
+ let sliceSize = 1024;
+ let bytesLength = byteCharacters.length;
+ let slicesCount = Math.ceil(bytesLength / sliceSize);
+ let byteArrays = new Array(slicesCount);
+
+ for (let sliceIndex = 0; sliceIndex < slicesCount; ++sliceIndex) {
+ let begin = sliceIndex * sliceSize;
+ let end = Math.min(begin + sliceSize, bytesLength);
+
+ let bytes = new Array(end - begin);
+ for (let offset = begin, i = 0; offset < end; ++i, ++offset) {
+ bytes[i] = byteCharacters[offset].charCodeAt(0);
+ }
+ byteArrays[sliceIndex] = new Uint8Array(bytes);
+ }
+ return new Blob(byteArrays, {type: contentType});
+ };
+
+ public base64toBlob = (base64Data, contentType):any => {
+ let byteCharacters = atob(base64Data);
+ return this.byteCharactersToBlob(byteCharacters, contentType);
+ };
+
+ public downloadFile = (blob, fileName):void=> {
+ let url = this.$window.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);
+
+ }
+}