protected async Task <string> GenerateSlug(
string name,
int?id = null,
CancellationToken cancellationToken = default)
{
// Though not compulsory, since multiple todo-items with the same name will probably be created but will have different execution day or time
// In order to reduce the chance of collision with existing slugs, a random string is appended to the slug name.
var randomString = RandomStringGenerator.Get(7);
var slug = new SlugHelper().GenerateSlug($"{name} ${randomString}");
// Ensure uniqueness
List <string> similarSlugs = await DbSet
.Where(todoItem => todoItem.Id != id)
.Where(todoItem => EF.Functions.Like(todoItem.Slug, $"{slug}%"))
.Select(todoItem => todoItem.Slug).AsNoTracking().ToListAsync(cancellationToken);
if (!similarSlugs.Contains(slug))
{
return(slug);
}
var alternativeSlug = "";
var suffix = 2;
do
{
alternativeSlug = $"{slug}-{suffix}";
suffix++;
} while(similarSlugs.Contains(alternativeSlug));
return(alternativeSlug);
}
private async Task SeedTodoItems()
{
if (!await Uow.UserRepository.IsEmpty()) { return; }
var randomUser = await Uow.UserRepository.Add(new User
{
IdFromIdp = $"random-{RandomStringGenerator.Get(14)}"
});
var todoItems = new TodoItem[]
{
new TodoItem{ Name="Sleep", User = randomUser },
new TodoItem{ Name="Eat", User = randomUser },
new TodoItem{ Name="Drink", User = randomUser }
};
List<Task<TodoItem>> tasks = new List<Task<TodoItem>>();
foreach (TodoItem todoItem in todoItems)
{
tasks.Add(Uow.TodoItemRepository.Add(todoItem));
}
await Task.WhenAll(tasks);
await Uow.Commit();
}