diff options
Diffstat (limited to 'bug/operation.go')
| -rw-r--r-- | bug/operation.go | 40 |
1 files changed, 34 insertions, 6 deletions
diff --git a/bug/operation.go b/bug/operation.go index cd4094dc..4c6f2e5a 100644 --- a/bug/operation.go +++ b/bug/operation.go @@ -1,11 +1,13 @@ package bug import ( - "github.com/MichaelMure/git-bug/util/git" - "github.com/pkg/errors" - + "crypto/sha256" + "encoding/json" "fmt" "time" + + "github.com/MichaelMure/git-bug/util/git" + "github.com/pkg/errors" ) // OperationType is an operation type identifier @@ -24,6 +26,8 @@ const ( type Operation interface { // base return the OpBase of the Operation, for package internal use base() *OpBase + // Hash return the hash of the operation + Hash() (git.Hash, error) // Time return the time when the operation was added Time() time.Time // GetUnixTime return the unix timestamp when the operation was added @@ -40,11 +44,35 @@ type Operation interface { GetMetadata(key string) (string, bool) } +func hashRaw(data []byte) git.Hash { + hasher := sha256.New() + return git.Hash(fmt.Sprintf("%x", hasher.Sum(data))) +} + +// hash compute the hash of the serialized operation +func hashOperation(op Operation) (git.Hash, error) { + base := op.base() + + if base.hash != "" { + return base.hash, nil + } + + data, err := json.Marshal(op) + if err != nil { + return "", err + } + + base.hash = hashRaw(data) + + return base.hash, nil +} + // OpBase implement the common code for all operations type OpBase struct { - OperationType OperationType `json:"type"` - Author Person `json:"author"` - UnixTime int64 `json:"timestamp"` + OperationType OperationType `json:"type"` + Author Person `json:"author"` + UnixTime int64 `json:"timestamp"` + hash git.Hash Metadata map[string]string `json:"metadata,omitempty"` } |