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package bug
import (
"encoding/json"
"fmt"
"strings"
"github.com/MichaelMure/git-bug/identity"
"github.com/MichaelMure/git-bug/util/timestamp"
"github.com/MichaelMure/git-bug/util/git"
"github.com/MichaelMure/git-bug/util/text"
)
var _ Operation = &SetTitleOperation{}
// SetTitleOperation will change the title of a bug
type SetTitleOperation struct {
OpBase
Title string
Was string
}
func (op *SetTitleOperation) base() *OpBase {
return &op.OpBase
}
func (op *SetTitleOperation) Hash() (git.Hash, error) {
return hashOperation(op)
}
func (op *SetTitleOperation) Apply(snapshot *Snapshot) {
snapshot.Title = op.Title
hash, err := op.Hash()
if err != nil {
// Should never error unless a programming error happened
// (covered in OpBase.Validate())
panic(err)
}
item := &SetTitleTimelineItem{
hash: hash,
Author: op.Author,
UnixTime: timestamp.Timestamp(op.UnixTime),
Title: op.Title,
Was: op.Was,
}
snapshot.Timeline = append(snapshot.Timeline, item)
}
func (op *SetTitleOperation) Validate() error {
if err := opBaseValidate(op, SetTitleOp); err != nil {
return err
}
if text.Empty(op.Title) {
return fmt.Errorf("title is empty")
}
if strings.Contains(op.Title, "\n") {
return fmt.Errorf("title should be a single line")
}
if !text.Safe(op.Title) {
return fmt.Errorf("title should be fully printable")
}
if strings.Contains(op.Was, "\n") {
return fmt.Errorf("previous title should be a single line")
}
if !text.Safe(op.Was) {
return fmt.Errorf("previous title should be fully printable")
}
return nil
}
// Workaround to avoid the inner OpBase.MarshalJSON overriding the outer op
// MarshalJSON
func (op *SetTitleOperation) MarshalJSON() ([]byte, error) {
base, err := json.Marshal(op.OpBase)
if err != nil {
return nil, err
}
// revert back to a flat map to be able to add our own fields
var data map[string]interface{}
if err := json.Unmarshal(base, &data); err != nil {
return nil, err
}
data["title"] = op.Title
data["was"] = op.Was
return json.Marshal(data)
}
// Workaround to avoid the inner OpBase.MarshalJSON overriding the outer op
// MarshalJSON
func (op *SetTitleOperation) UnmarshalJSON(data []byte) error {
// Unmarshal OpBase and the op separately
base := OpBase{}
err := json.Unmarshal(data, &base)
if err != nil {
return err
}
aux := struct {
Title string `json:"title"`
Was string `json:"was"`
}{}
err = json.Unmarshal(data, &aux)
if err != nil {
return err
}
op.OpBase = base
op.Title = aux.Title
op.Was = aux.Was
return nil
}
// Sign post method for gqlgen
func (op *SetTitleOperation) IsAuthored() {}
func NewSetTitleOp(author identity.Interface, unixTime int64, title string, was string) *SetTitleOperation {
return &SetTitleOperation{
OpBase: newOpBase(SetTitleOp, author, unixTime),
Title: title,
Was: was,
}
}
type SetTitleTimelineItem struct {
hash git.Hash
Author identity.Interface
UnixTime timestamp.Timestamp
Title string
Was string
}
func (s SetTitleTimelineItem) Hash() git.Hash {
return s.hash
}
// Convenience function to apply the operation
func SetTitle(b Interface, author identity.Interface, unixTime int64, title string) (*SetTitleOperation, error) {
it := NewOperationIterator(b)
var lastTitleOp Operation
for it.Next() {
op := it.Value()
if op.base().OperationType == SetTitleOp {
lastTitleOp = op
}
}
var was string
if lastTitleOp != nil {
was = lastTitleOp.(*SetTitleOperation).Title
} else {
was = b.FirstOp().(*CreateOperation).Title
}
setTitleOp := NewSetTitleOp(author, unixTime, title, was)
if err := setTitleOp.Validate(); err != nil {
return nil, err
}
b.Append(setTitleOp)
return setTitleOp, nil
}
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