/// <summary>
/// Select new name and avoid collision in the resource
/// group.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="collection"></param>
/// <param name="resourceGroup"></param>
/// <param name="prefix"></param>
/// <param name="name"></param>
/// <returns></returns>
public static async Task <string> SelectResourceNameAsync <T>(
this ISupportsGettingByResourceGroup <T> collection,
string resourceGroup, string prefix, string name = null) where T : class
{
if (string.IsNullOrEmpty(prefix))
{
throw new ArgumentNullException(nameof(prefix));
}
// Check name - null means we need to create one
if (string.IsNullOrEmpty(name))
{
while (true)
{
name = StringEx.CreateUnique(10, prefix);
var exists = await collection.ContainsAsync(resourceGroup, name);
if (!exists)
{
break;
}
}
}
else
{
var exists = await collection.ContainsAsync(resourceGroup, name);
if (exists)
{
throw new ArgumentException(
$"A {prefix} resource exists with name {name}", nameof(name));
}
}
return(name);
}
/// <summary>
/// Returns whether a resource with name exists in
/// the resource group.
/// </summary>
/// <typeparam name="T"></typeparam>
/// <param name="collection"></param>
/// <param name="resourceGroup"></param>
/// <param name="name"></param>
/// <returns></returns>
public static async Task <bool> ContainsAsync <T>(
this ISupportsGettingByResourceGroup <T> collection,
string resourceGroup, string name) where T : class
{
if (collection == null)
{
throw new ArgumentNullException(nameof(collection));
}
if (string.IsNullOrEmpty(resourceGroup))
{
throw new ArgumentNullException(nameof(resourceGroup));
}
try {
var resource = await collection.GetByResourceGroupAsync(
resourceGroup, name);
return(resource != null);
}
catch {
return(false);
}
}
