public async Task <IActionResult> Add(AddDestinationViewModel model)
{
if (!string.IsNullOrWhiteSpace(model.Name) && await destinationService.ExistsAsync(model.Name))
{
ModelState.AddModelError(nameof(model.Name),
"Destination with the same name already exists.");
}
var invalidIds = await tagService.CheckForInvalidTagIds(model.SelectedTags);
if (invalidIds.Any())
{
ModelState.AddModelError(nameof(model.SelectedTags),
$"Non-existing tags were selected. (Count: {invalidIds.Count})");
}
if (!await regionService.ExistsAsync(model.RegionId))
{
ModelState.AddModelError(nameof(model.RegionId), "Selected region does not exist.");
}
if (!ModelState.IsValid)
{
model.Tags = await GetTags();
model.Regions = await GetRegions();
return(View(model));
}
await destinationService.AddAsync(model.Name, model.RegionId, model.SelectedTags);
return(RedirectToAction(nameof(Add)));
}