Support to getting image & video name for motion photo

src/services/motionPhotoService.ts

@@ -1,10 +1,25 @@
 import downloadManager from "./downloadManager"
 import { File } from './fileService';
 import JSZip from 'jszip';
+import { fileExtensionWithDot, fileNameWithoutExtension } from "utils/file";
 
 class MotionPhoto {
     imageBlob: Promise<Uint8Array>
     videoBlob: Promise<Uint8Array>
+    title: String
+    // name of the file which contains image
+    _zipImageName: String
+    // name of the file which contains video
+    _zipVideoName: String
+
+    imageName() {
+        return fileNameWithoutExtension(this.title) + fileExtensionWithDot(this._zipImageName);
+    }
+
+    videoName() {
+        return fileNameWithoutExtension(this.title) + fileExtensionWithDot(this._zipVideoName);
+    }
+
 }
 
 export const downloadAndDecodeMotionPhoto = async (file: File) => {
@@ -13,10 +28,13 @@ export const downloadAndDecodeMotionPhoto = async (file: File) => {
     return JSZip.loadAsync(zipBlob, { createFolders: true })
         .then(function (zip) {
             let instnace = new MotionPhoto();
+            instnace.title = file.metadata.title
             Object.keys(zip.files).forEach(function (filename) {
                 if (filename.startsWith("image")) {
+                    instnace._zipImageName = filename
                     instnace.imageBlob = zip.files[filename].async('uint8array');
                 } else if (filename.startsWith("video")) {
+                    instnace._zipVideoName = filename
                     instnace.videoBlob = zip.files[filename].async('uint8array');
                 }
             })

src/utils/file/index.ts

@@ -146,3 +146,15 @@ export function removeUnneccessaryFileProps(files:File[]):File[] {
     });
     return stripedFiles;
 }
+
+export function fileNameWithoutExtension(filename) {
+    var lastDotPosition = filename.lastIndexOf(".");
+    if (lastDotPosition === -1) return filename;
+    else return filename.substr(0, lastDotPosition);
+}
+
+export function fileExtensionWithDot(filename) {
+    var lastDotPosition = filename.lastIndexOf(".");
+    if (lastDotPosition === -1) return "";
+    else return filename.substr(lastDotPosition);
+}