mirror of
https://github.com/MichaelMure/git-bug.git
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101 lines
2.1 KiB
Go
101 lines
2.1 KiB
Go
package bug
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import (
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"bytes"
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"encoding/gob"
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"github.com/MichaelMure/git-bug/repository"
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"github.com/MichaelMure/git-bug/util"
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)
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// OperationPack represent an ordered set of operation to apply
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// to a Bug. These operations are stored in a single Git commit.
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//
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// These commits will be linked together in a linear chain of commits
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// inside Git to form the complete ordered chain of operation to
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// apply to get the final state of the Bug
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type OperationPack struct {
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Operations []Operation
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// Private field so not serialized by gob
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commitHash util.Hash
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}
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// ParseOperationPack will deserialize an OperationPack from raw bytes
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func ParseOperationPack(data []byte) (*OperationPack, error) {
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reader := bytes.NewReader(data)
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decoder := gob.NewDecoder(reader)
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var opp OperationPack
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err := decoder.Decode(&opp)
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if err != nil {
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return nil, err
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}
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return &opp, nil
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}
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// Serialize will serialise an OperationPack into raw bytes
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func (opp *OperationPack) Serialize() ([]byte, error) {
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var data bytes.Buffer
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encoder := gob.NewEncoder(&data)
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err := encoder.Encode(*opp)
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if err != nil {
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return nil, err
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}
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return data.Bytes(), nil
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}
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// Append a new operation to the pack
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func (opp *OperationPack) Append(op Operation) {
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opp.Operations = append(opp.Operations, op)
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}
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// IsEmpty tell if the OperationPack is empty
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func (opp *OperationPack) IsEmpty() bool {
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return len(opp.Operations) == 0
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}
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// IsValid tell if the OperationPack is considered valid
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func (opp *OperationPack) IsValid() bool {
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return !opp.IsEmpty()
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}
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// Write will serialize and store the OperationPack as a git blob and return
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// its hash
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func (opp *OperationPack) Write(repo repository.Repo) (util.Hash, error) {
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data, err := opp.Serialize()
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if err != nil {
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return "", err
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}
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hash, err := repo.StoreData(data)
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if err != nil {
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return "", err
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}
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return hash, nil
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}
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// Make a deep copy
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func (opp *OperationPack) Clone() OperationPack {
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clone := OperationPack{
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Operations: make([]Operation, len(opp.Operations)),
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commitHash: opp.commitHash,
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}
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for i, op := range opp.Operations {
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clone.Operations[i] = op
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}
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return clone
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}
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