// TODO: move to validation class?
/// <summary>
/// Submit request to query engine for execution.
/// </summary>
private static Dictionary <string, string> ExecuteQuery(
string operation,
RequestManager request)
{
return(operation switch
{
// TODO: (switch) move literal string to const
"InsertKey" => QueryProvider.InsertKey(request),
"InsertTag" => QueryProvider.InsertTag(request),
"SelectKey" => QueryProvider.SelectKey(request),
"SelectTags" => QueryProvider.SelectTags(request),
"SelectTagCount" => QueryProvider.SelectTagCount(request),
"SelectKeyList" => QueryProvider.SelectKeyList(request),
"SelectKeyTags" => QueryProvider.SelectKeyTags(request),
"UpdateKey" => QueryProvider.UpdateKey(request),
"UpdateData" => QueryProvider.UpdateData(request),
"UpdateTag" => QueryProvider.UpdateTag(request),
"UpdateKeyTag" => QueryProvider.UpdateKeyTag(request),
"DeleteKey" => QueryProvider.DeleteKey(request),
"DeleteTag" => QueryProvider.DeleteTag(request),
"DeleteKeyTags" => QueryProvider.DeleteKeyTags(request),
"DeleteKeyTag" => QueryProvider.DeleteKeyTag(request),
_ => new Dictionary <string, string>(),
});