private async void postButton_Clicked(object sender, EventArgs e)
{
bool formValid = true;
var postTitle = title.Text;
var postDescription = description.Text;
imageUrl = "";
var postId = $@"{Guid.NewGuid()}";
// Form validation
// validate post title
if (string.IsNullOrEmpty(postTitle))
{
titleErrorLabel.Text = "Title cannot be empty";
titleErrorLabel.IsVisible = true;
formValid = false;
}
else
{
titleErrorLabel.IsVisible = false;
}
// validate post description
if (string.IsNullOrEmpty(postDescription))
{
descriptionErrorLabel.Text = "Description cannot be empty";
descriptionErrorLabel.IsVisible = true;
formValid = false;
}
else
{
descriptionErrorLabel.IsVisible = false;
}
if (categoryPicker.SelectedItem == null)
{
categoryErrorLabel.Text = "Please select a category";
categoryErrorLabel.IsVisible = true;
formValid = false;
}
else
{
categoryErrorLabel.IsVisible = false;
}
if (formValid)
{
loader.IsVisible = true;
loader.IsRunning = true;
postButton.IsEnabled = false;
// only upload file to Firebase Storage if the form is valid
if (file != null)
{
// upload image to Firebase Storage
var uniqueFileName = postId;
try
{
imageUrl = await firebaseHelper.UploadImage(file.GetStream(), uniqueFileName);
}
catch (Exception ex)
{
postButton.IsEnabled = true;
await DisplayAlert("Alert", "Fail to Upload Image: " + ex.Message, "OK");
}
}
// Add post to Realtime Database
try
{
await firebaseHelper.AddPost(postId, postTitle, postDescription, CategorySelectedItem.categoryName, imageUrl);
loader.IsVisible = false;
loader.IsRunning = false;
postButton.IsEnabled = true;
await DisplayAlert("Alert", "Post Added", "OK");
Categories.Clear();
BindingContext = this;
App.Current.MainPage = new MasterDetailPageKitaBantu();
}
catch (Exception ex)
{
loader.IsVisible = false;
loader.IsRunning = false;
postButton.IsEnabled = true;
await DisplayAlert("Alert", "Fail to Add Post: " + ex.Message, "OK");
}
}
}
