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package operations
import (
"fmt"
"strings"
"github.com/MichaelMure/git-bug/bug"
"github.com/MichaelMure/git-bug/util/text"
)
// SetTitleOperation will change the title of a bug
var _ bug.Operation = SetTitleOperation{}
type SetTitleOperation struct {
*bug.OpBase
Title string `json:"title"`
Was string `json:"was"`
}
func (op SetTitleOperation) Apply(snapshot bug.Snapshot) bug.Snapshot {
snapshot.Title = op.Title
return snapshot
}
func (op SetTitleOperation) Validate() error {
if err := bug.OpBaseValidate(op, bug.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
}
func NewSetTitleOp(author bug.Person, unixTime int64, title string, was string) SetTitleOperation {
return SetTitleOperation{
OpBase: bug.NewOpBase(bug.SetTitleOp, author, unixTime),
Title: title,
Was: was,
}
}
// Convenience function to apply the operation
func SetTitle(b bug.Interface, author bug.Person, unixTime int64, title string) error {
it := bug.NewOperationIterator(b)
var lastTitleOp bug.Operation
for it.Next() {
op := it.Value()
if op.OpType() == bug.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 err
}
b.Append(setTitleOp)
return nil
}
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