static async Task <string?> ApplyTemplateAsync(
EntityTemplate template,
EntityTemplateFunctions functions,
TemplateImportState state,
SeqConnection connection,
RootEntity apiRoot,
bool merge)
{
if (!JsonTemplateEvaluator.TryEvaluate(template.Entity, functions.Exports, out var entity, out var error))
{
return(error);
}
var asObject = (IDictionary <string, object>)JsonTemplateObjectGraphConverter.Convert(entity);
// O(Ntemplates) - easy target for optimization with some caching.
var resourceGroupLink = template.ResourceGroup + "Resources";
var link = apiRoot.Links.Single(l => resourceGroupLink.Equals(l.Key, StringComparison.OrdinalIgnoreCase));
var resourceGroup = await connection.Client.GetAsync <ResourceGroup>(apiRoot, link.Key);
if (state.TryGetCreatedEntityId(template.Name, out var existingId) &&
await CheckEntityExistenceAsync(connection, resourceGroup, existingId))
{
asObject["Id"] = existingId;
await UpdateEntityAsync(connection, resourceGroup, asObject, existingId);
Log.Information("Updated existing entity {EntityId} from {TemplateName}", existingId, template.Name);
}
else if (merge && !state.TryGetCreatedEntityId(template.Name, out _) &&
await TryFindMergeTargetAsync(connection, resourceGroup, asObject) is { } mergedId)
{
asObject["Id"] = mergedId;
await UpdateEntityAsync(connection, resourceGroup, asObject, mergedId);
state.AddOrUpdateCreatedEntityId(template.Name, mergedId);
Log.Information("Merged and updated existing entity {EntityId} from {TemplateName}", existingId, template.Name);
}