wehub-resource-sync
69 lines
2.1 KiB
Go
69 lines
2.1 KiB
Go
// Copyright 2025 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 extensions
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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/doltgresql/core/id"
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"github.com/dolthub/doltgresql/utils"
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)
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// Serialize returns the Extension as a byte slice. If the Extension is invalid (invalid ExtName), then this returns a
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// nil slice.
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func (ext Extension) Serialize(ctx context.Context) ([]byte, error) {
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if !ext.ExtName.IsValid() {
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return nil, nil
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}
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// Initialize the writer
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writer := utils.NewWriter(256)
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writer.VariableUint(0) // Version
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// Write the extension data
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writer.Id(ext.ExtName.AsId())
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writer.Id(ext.Namespace.AsId())
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writer.Bool(ext.Relocatable)
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writer.String(string(ext.LibIdentifier))
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// Returns the data
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return writer.Data(), nil
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}
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// DeserializeExtension returns the Extension that was serialized in the byte slice. Returns an empty Extension (has an
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// invalid ID) if data is nil or empty.
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func DeserializeExtension(ctx context.Context, data []byte) (Extension, error) {
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if len(data) == 0 {
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return Extension{}, nil
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}
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reader := utils.NewReader(data)
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version := reader.VariableUint()
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if version != 0 {
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return Extension{}, errors.Errorf("version %d of extensions are not supported, please upgrade the server", version)
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}
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// Read from the reader
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ext := Extension{}
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ext.ExtName = id.Extension(reader.Id())
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ext.Namespace = id.Namespace(reader.Id())
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ext.Relocatable = reader.Bool()
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ext.LibIdentifier = LibraryIdentifier(reader.String())
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if !reader.IsEmpty() {
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return Extension{}, errors.Errorf("extra data found while deserializing an extension")
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}
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// Return the deserialized object
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return ext, nil
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}
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