wehub-resource-sync
134 lines
4.4 KiB
Go
134 lines
4.4 KiB
Go
// Copyright 2026 Dolthub, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package casts
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import (
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"context"
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"github.com/cockroachdb/errors"
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"github.com/dolthub/dolt/go/libraries/doltcore/doltdb"
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"github.com/dolthub/dolt/go/libraries/doltcore/merge"
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"github.com/dolthub/dolt/go/store/hash"
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"github.com/dolthub/dolt/go/store/prolly"
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"github.com/dolthub/dolt/go/store/prolly/tree"
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"github.com/dolthub/doltgresql/core/id"
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"github.com/dolthub/doltgresql/core/rootobject/objinterface"
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"github.com/dolthub/doltgresql/flatbuffers/gen/serial"
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)
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// storage is used to read from and write to the root.
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var storage = objinterface.RootObjectSerializer{
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Bytes: (*serial.RootValue).CastsBytes,
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RootValueAdd: serial.RootValueAddCasts,
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}
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// HandleMerge implements the interface objinterface.Collection.
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func (*Collection) HandleMerge(ctx context.Context, mro merge.MergeRootObject) (doltdb.RootObject, *merge.MergeStats, error) {
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ourCast := mro.OurRootObj.(Cast)
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theirCast := mro.TheirRootObj.(Cast)
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// Ensure that they have the same identifier
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if ourCast.ID != theirCast.ID {
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return nil, nil, errors.Newf("attempted to merge different casts: `%s` and `%s`",
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ourCast.Name().String(), theirCast.Name().String())
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}
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ourHash, err := ourCast.HashOf(ctx)
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if err != nil {
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return nil, nil, err
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}
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theirHash, err := theirCast.HashOf(ctx)
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if err != nil {
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return nil, nil, err
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}
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if ourHash.Equal(theirHash) {
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return mro.OurRootObj, &merge.MergeStats{
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Operation: merge.TableUnmodified,
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Adds: 0,
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Deletes: 0,
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Modifications: 0,
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DataConflicts: 0,
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SchemaConflicts: 0,
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ConstraintViolations: 0,
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}, nil
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}
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// TODO: figure out a decent merge strategy
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return nil, nil, errors.Errorf("unable to merge `%s`", theirCast.Name().String())
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}
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// LoadCollection implements the interface objinterface.Collection.
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func (*Collection) LoadCollection(ctx context.Context, root objinterface.RootValue) (objinterface.Collection, error) {
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return LoadCasts(ctx, root)
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}
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// LoadCollectionHash implements the interface objinterface.Collection.
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func (*Collection) LoadCollectionHash(ctx context.Context, root objinterface.RootValue) (hash.Hash, error) {
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m, ok, err := storage.GetProllyMap(ctx, root)
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if err != nil || !ok {
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return hash.Hash{}, err
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}
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return m.HashOf(), nil
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}
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// LoadCasts loads the casts collection from the given root.
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func LoadCasts(ctx context.Context, root objinterface.RootValue) (*Collection, error) {
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m, ok, err := storage.GetProllyMap(ctx, root)
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if err != nil {
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return nil, err
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}
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if !ok {
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m, err = prolly.NewEmptyAddressMap(root.NodeStore())
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if err != nil {
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return nil, err
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}
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}
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return NewCollection(ctx, m, root.NodeStore())
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}
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// ResolveNameFromObjects implements the interface objinterface.Collection.
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func (*Collection) ResolveNameFromObjects(ctx context.Context, name doltdb.TableName, rootObjects []objinterface.RootObject) (doltdb.TableName, id.Id, error) {
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// There are root objects to search through, so we'll create a temporary store
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ns := tree.NewTestNodeStore()
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addressMap, err := prolly.NewEmptyAddressMap(ns)
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if err != nil {
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return doltdb.TableName{}, id.Null, err
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}
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tempCollection, err := NewCollection(ctx, addressMap, ns)
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if err != nil {
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return doltdb.TableName{}, id.Null, err
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}
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for _, rootObject := range rootObjects {
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if c, ok := rootObject.(Cast); ok {
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if err = tempCollection.AddCast(ctx, c); err != nil {
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return doltdb.TableName{}, id.Null, err
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}
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}
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}
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return tempCollection.ResolveName(ctx, name)
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}
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// Serializer implements the interface objinterface.Collection.
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func (*Collection) Serializer() objinterface.RootObjectSerializer {
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return storage
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}
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// UpdateRoot implements the interface objinterface.Collection.
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func (pgc *Collection) UpdateRoot(ctx context.Context, root objinterface.RootValue) (objinterface.RootValue, error) {
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m, err := pgc.Map(ctx)
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if err != nil {
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return nil, err
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}
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return storage.WriteProllyMap(ctx, root, m)
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}
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