public Task Load(ResourceDocument fullResourceState)
{
if (!TryGetIdentity(fullResourceState, out var identity))
{
throw new System.Exception("Identity field is required.");
}
if (!TryGetKindManager(fullResourceState, out var manager))
{
throw new System.Exception("Valid kind required.");
}
var newState = new ResourceState(
manager, identity, fullResourceState
);
if (!Validate(newState))
{
throw new System.Exception("Invalid resource parameters specified.");
}
CommitResourceState(newState);
return(newState.Manager.Save(newState));
}
public Task Apply(ResourceDocument partialResourceState)
{
if (!TryGetIdentity(partialResourceState, out var identity))
{
throw new System.Exception("Identity field is required.");
}
if (!TryGetResourceState(identity, out var existingState))
{
existingState = CreateDefaultState(identity, partialResourceState);
}
// ignore any state in case it was present
partialResourceState.State = null;
var newState = ApplyFields(partialResourceState, existingState);
if (!Validate(newState))
{
throw new System.Exception("Invalid resource parameters specified.");
}
CommitResourceState(newState);
return(newState.Manager.Save(newState));
}
private ResourceState ApplyFields(ResourceDocument partialResourceState, ResourceState existingState)
{
return(new ResourceState(
existingState.Manager,
existingState.Identity,
existingState.FullDocument.Patch(partialResourceState)
));
}
private bool TryGetKindManager(ResourceDocument partialResourceDocument, [NotNullWhen(true)] out ResourceManager?kindManager)
{
if (partialResourceDocument.Kind == null)
{
kindManager = default;
return(false);
}
return(_resourceManagers.TryFind(q => q.Kind.GetKindDescriptor().Equals(partialResourceDocument.Kind.Value), out kindManager));
}
private ResourceState CreateDefaultState(string identity, ResourceDocument partialResourceState)
{
if (!TryGetKindManager(partialResourceState, out var manager))
{
throw new System.Exception("Valid kind required.");
}
// todo: create default document from kind schema
var stateDoc = new ResourceDocument(
new ResourceDefinition(new List <ResourceField>
{
new ResourceField("identity", ResourceFieldValue.String(identity))
}),
kind: manager.Kind.GetKindDescriptor());
return(new ResourceState(manager, identity, stateDoc));
}
private bool TryGetIdentity(ResourceDocument resourceDocument, [NotNullWhen(true)] out string?identity)
{
identity = resourceDocument.Definition["identity"]?.GetString();
return(identity != null);
}