in cloud-functions-start/public/scripts/main.js [140:160]
function onMediaFileSelected(event) {
event.preventDefault();
var file = event.target.files[0];
// Clear the selection in the file picker input.
imageFormElement.reset();
// Check if the file is an image.
if (!file.type.match('image.*')) {
var data = {
message: 'You can only share images',
timeout: 2000
};
signInSnackbarElement.MaterialSnackbar.showSnackbar(data);
return;
}
// Check if the user is signed-in
if (checkSignedInWithMessage()) {
saveImageMessage(file);
}
}