Rename an image file when uploading in ionic 2 - ionic2

Question

i stumbled across this function on the internet.
private createFileName() {
var d = new Date(),
n = d.getTime(),
newFileName = n + ".jpg";
return newFileName;
}
It's purpose is to rename an image file. The questions i have are
Does this restrict image upload to jpg only or does it convert it to
jpg.
If it's the former how can i get the image extension before upload
and modify private createFileName(ext) function like so, so as to upload
every image type.
If it would help here is the full code
lastImage: string = null;
loading: Loading;
public takePicture(sourceType) {
// Create options for the Camera Dialog
var options = {
quality: 100,
sourceType: sourceType,
saveToPhotoAlbum: false,
correctOrientation: true
};
// Get the data of an image
this.camera.getPicture(options).then((imagePath) => {
// Special handling for Android library
if (this.platform.is('android') && sourceType === this.camera.PictureSourceType.PHOTOLIBRARY) {
this.filePath.resolveNativePath(imagePath)
.then(filePath => {
let correctPath = filePath.substr(0, filePath.lastIndexOf('/') + 1);
let currentName = imagePath.substring(imagePath.lastIndexOf('/') + 1, imagePath.lastIndexOf('?'));
this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
});
} else {
var currentName = imagePath.substr(imagePath.lastIndexOf('/') + 1);
var correctPath = imagePath.substr(0, imagePath.lastIndexOf('/') + 1);
this.copyFileToLocalDir(correctPath, currentName, this.createFileName());
}
}, (err) => {
this.presentToast('Error while selecting image.');
});
}
private copyFileToLocalDir(namePath, currentName, newFileName) {
this.file.copyFile(namePath, currentName, cordova.file.dataDirectory, newFileName).then(success => {
this.lastImage = newFileName;
}, error => {
this.presentToast('Error while storing file.');
});
}
private presentToast(text) {
let toast = this.toastCtrl.create({
message: text,
duration: 3000,
position: 'top'
});
toast.present();
}
// Always get the accurate path to your apps folder
public pathForImage(img) {
if (img === null) {
return '';
} else {
return cordova.file.dataDirectory + img;
}
}
public uploadImage() {
// Destination URL
var url = "http://my_url/uploads.php";
// File for Upload
var targetPath = this.pathForImage(this.lastImage);
// File name only
var filename = this.lastImage;
var options = {
fileKey: "file",
fileName: filename,
chunkedMode: false,
mimeType: "multipart/form-data",
params : {'fileName': filename}
};
const fileTransfer: TransferObject = this.transfer.create();
this.loading = this.loadingCtrl.create({
content: 'Uploading...',
});
this.loading.present();
// Use the FileTransfer to upload the image
fileTransfer.upload(targetPath, url, options).then(data => {
this.loading.dismissAll()
this.presentToast('Image succesfully uploaded.');
}, err => {
this.loading.dismissAll()
this.presentToast('Error while uploading file.');
});
}

Answer 1

1- It does not restrict to "jpg", and it does not convert to "jpg", as the method name says: create Filename, it creates a string, with the filename, just that.
2- The image extension will be jpg, as it is the default camera encodingType, and it seems like you are taking pictures using the camera. You can change the encodingtype in the camera options.
You can find all the camera options in https://ionicframework.com/docs/native/camera/