diff options
Diffstat (limited to 'lib/kernel/Branch.ml')
| -rw-r--r-- | lib/kernel/Branch.ml | 28 |
1 files changed, 20 insertions, 8 deletions
diff --git a/lib/kernel/Branch.ml b/lib/kernel/Branch.ml index 1e7794e..4b9d948 100644 --- a/lib/kernel/Branch.ml +++ b/lib/kernel/Branch.ml @@ -12,6 +12,7 @@ module Make (S : Abstract.Storage.STORAGE) = struct module MultigroupM = Merkle.Interface (S) (Merkle.StringKey) (M) module MMDirectory = Prototype.Directory.OfTree (S) (Merkle.StringKey) (M) module MMAssociative = Prototype.Associative.OfTree (S) (Merkle.StringKey) + module MMAddressable = Prototype.Addressable.OfTree (S) (Merkle.StringKey) module Error = struct open Concepts.Condition @@ -29,10 +30,6 @@ module Make (S : Abstract.Storage.STORAGE) = struct and Body : Concepts.Encoding.Record.BODY = struct type nonrec t = t - let load tx addr = - SI.get_req tx addr - |> Utilities.Result.fmap Representation.of_blob - let tag = 'Y' let malformed () = Concepts.Condition. @@ -56,9 +53,14 @@ module Make (S : Abstract.Storage.STORAGE) = struct |> fmap (Value.option_of_bencode (fun v -> Value.hash_of_bencode v |> Result.map (fun hash -> S.Hash hash) - |> Result.map (Fun.flip (SI.Pointer.make) load))) in + |> Result.map (SI.Pointer.make Loader.load))) in Ok { multigroups; previous } end + and Loader : sig val load : (S.transaction -> S.address -> (t, Concepts.Condition.condition) result) end = struct + let load tx addr = + SI.get_req tx addr + |> Utilities.Result.fmap Representation.of_blob + end class branch storage value node = object (self) inherit Lifecycle.null @@ -73,15 +75,25 @@ module Make (S : Abstract.Storage.STORAGE) = struct Protocols.[ Addressable.make self; Prototype.Associative.(of_properties [ "multigroup", update_only (fun node' -> + (* FIXME: most of this should not be here *) let open Utilities.Result in let* addressable = Handle.require Addressable.from node' in let addr = Addressable.address addressable in - ignore addr; - failwith "TODO") ]); + let branch' = { multigroups = addr; + previous = self#address + |> (fun hash -> S.Hash hash) + |> SI.Pointer.make Loader.load + |> Option.some } in + let* node' = SI.with_transaction storage (fun tx -> + let* _ = SI.store_blob tx (Representation.to_blob branch') in + MultigroupM.find tx addr |> fmap (Option.to_result ~none:(Error.incomplete_branch addr))) in + new branch storage branch' node' |> Protocols.Handle.make |> Result.ok) ]); Prototype.Directory.of_properties [ "multigroup", Prototype.mixture_of node (fun make node -> - [ MMDirectory.make + [ MMAddressable.make + ~node:(MultigroupM.into node); + MMDirectory.make ~storage ~node ~constructor:(M.wrap storage); MMAssociative.make |