package bug import ( "crypto/rand" "encoding/json" "fmt" "strings" "github.com/MichaelMure/git-bug/entity" "github.com/MichaelMure/git-bug/identity" "github.com/MichaelMure/git-bug/repository" "github.com/MichaelMure/git-bug/util/text" "github.com/MichaelMure/git-bug/util/timestamp" ) var _ Operation = &CreateOperation{} // CreateOperation define the initial creation of a bug type CreateOperation struct { OpBase // mandatory random bytes to ensure a better randomness of the data of the first // operation of a bug, used to later generate the ID // len(Nonce) should be > 20 and < 64 bytes Nonce []byte `json:"nonce"` Title string `json:"title"` Message string `json:"message"` Files []repository.Hash `json:"files"` } // Sign-post method for gqlgen func (op *CreateOperation) IsOperation() {} func (op *CreateOperation) base() *OpBase { return &op.OpBase } func (op *CreateOperation) Id() entity.Id { return idOperation(op) } func (op *CreateOperation) Apply(snapshot *Snapshot) { snapshot.addActor(op.Author) snapshot.addParticipant(op.Author) snapshot.Title = op.Title comment := Comment{ id: op.Id(), Message: op.Message, Author: op.Author, UnixTime: timestamp.Timestamp(op.UnixTime), } snapshot.Comments = []Comment{comment} snapshot.Author = op.Author snapshot.CreateTime = op.Time() snapshot.Timeline = []TimelineItem{ &CreateTimelineItem{ CommentTimelineItem: NewCommentTimelineItem(op.Id(), comment), }, } } func (op *CreateOperation) GetFiles() []repository.Hash { return op.Files } func (op *CreateOperation) Validate() error { if err := opBaseValidate(op, CreateOp); err != nil { return err } if len(op.Nonce) > 64 { return fmt.Errorf("create nonce is too big") } if len(op.Nonce) < 20 { return fmt.Errorf("create nonce is too small") } 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 is not fully printable") } if !text.Safe(op.Message) { return fmt.Errorf("message is not fully printable") } return nil } // UnmarshalJSON is a two step JSON unmarshaling // This workaround is necessary to avoid the inner OpBase.MarshalJSON // overriding the outer op's MarshalJSON func (op *CreateOperation) UnmarshalJSON(data []byte) error { // Unmarshal OpBase and the op separately base := OpBase{} err := json.Unmarshal(data, &base) if err != nil { return err } aux := struct { Nonce []byte `json:"nonce"` Title string `json:"title"` Message string `json:"message"` Files []repository.Hash `json:"files"` }{} err = json.Unmarshal(data, &aux) if err != nil { return err } op.OpBase = base op.Nonce = aux.Nonce op.Title = aux.Title op.Message = aux.Message op.Files = aux.Files return nil } // Sign post method for gqlgen func (op *CreateOperation) IsAuthored() {} func makeNonce(len int) []byte { result := make([]byte, len) _, err := rand.Read(result) if err != nil { panic(err) } return result } func NewCreateOp(author identity.Interface, unixTime int64, title, message string, files []repository.Hash) *CreateOperation { return &CreateOperation{ OpBase: newOpBase(CreateOp, author, unixTime), Nonce: makeNonce(20), Title: title, Message: message, Files: files, } } // CreateTimelineItem replace a Create operation in the Timeline and hold its edition history type CreateTimelineItem struct { CommentTimelineItem } // Sign post method for gqlgen func (c *CreateTimelineItem) IsAuthored() {} // Convenience function to apply the operation func Create(author identity.Interface, unixTime int64, title, message string) (*Bug, *CreateOperation, error) { return CreateWithFiles(author, unixTime, title, message, nil) } func CreateWithFiles(author identity.Interface, unixTime int64, title, message string, files []repository.Hash) (*Bug, *CreateOperation, error) { newBug := NewBug() createOp := NewCreateOp(author, unixTime, title, message, files) if err := createOp.Validate(); err != nil { return nil, createOp, err } newBug.Append(createOp) return newBug, createOp, nil }