resolve

type OwnerGroup struct {
	Kind, ID, Owner, Scope string
}

type Resolution struct {
	// Ref is the canonical reference every row is stored and read under (a
	// merged group resolves to its survivor). A zero Ref keeps the requested
	// one; a Ref of another tenant is an error.
	Ref contentref.ContentRef
	// Visible = live, or edited by the actor. Media's public files (covers,
	// previews) need only Visible.
	Visible bool
	// Accessible = the actor opens it. For media it is all or nothing: every
	// private file of the item, or none.
	Accessible bool
	// Editor = the actor may edit the item (staff, its creators, its owner
	// group's editors): media gives a visible item's editor its private files
	// whatever Accessible says.
	Editor bool
	// Owner is the user that owns the item (its first creator, a group's
	// owner), "" when none does. A comment ban in that owner's scope applies
	// to it.
	Owner string
	// Comments is the item's comments setting: open (also ""), closed or
	// hidden.
	Comments string
	// OwnerGroup is the user-owned group whose comment moderators
	// (access.GroupCommentsModerate in its scope, and its owner) moderate the
	// item's comments: a content item's owner group, or the group itself;
	// nil when none.
	OwnerGroup *OwnerGroup
}

type Resolver interface {
	Resolve(ctx context.Context, refs []contentref.ContentRef, actor access.Actor) (map[contentref.ContentKey]Resolution, error)
}