1 files changed, 52 insertions, 0 deletions
diff --git a/operations/set_title.go b/operations/set_title.go
new file mode 100644
index 00000000..5bd6260a
--- /dev/null
+++ b/operations/set_title.go
@@ -0,0 +1,52 @@
+package operations
+
+import (
+	"github.com/MichaelMure/git-bug/bug"
+)
+
+// SetTitleOperation will change the title of a bug
+
+var _ bug.Operation = SetTitleOperation{}
+
+type SetTitleOperation struct {
+	bug.OpBase
+	Title string
+	Was   string
+}
+
+func (op SetTitleOperation) Apply(snapshot bug.Snapshot) bug.Snapshot {
+	snapshot.Title = op.Title
+
+	return snapshot
+}
+
+func NewSetTitleOp(author bug.Person, title string, was string) SetTitleOperation {
+	return SetTitleOperation{
+		OpBase: bug.NewOpBase(bug.SetTitleOp, author),
+		Title:  title,
+		Was:    was,
+	}
+}
+
+// Convenience function to apply the operation
+func SetTitle(b bug.Interface, author bug.Person, title string) {
+	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, title, was)
+	b.Append(setTitleOp)
+}