1 files changed, 62 insertions, 0 deletions
diff --git a/bug/timeline.go b/bug/timeline.go
new file mode 100644
index 00000000..0f79958b
--- /dev/null
+++ b/bug/timeline.go
@@ -0,0 +1,62 @@
+package bug
+
+import "github.com/MichaelMure/git-bug/util/git"
+
+type TimelineItem interface {
+	// Hash return the hash of the item
+	Hash() (git.Hash, error)
+}
+
+// CreateTimelineItem replace a Create operation in the Timeline and hold its edition history
+type CreateTimelineItem struct {
+	hash    git.Hash
+	History []Comment
+}
+
+func NewCreateTimelineItem(hash git.Hash, comment Comment) *CreateTimelineItem {
+	return &CreateTimelineItem{
+		hash: hash,
+		History: []Comment{
+			comment,
+		},
+	}
+}
+
+func (c *CreateTimelineItem) Hash() (git.Hash, error) {
+	return c.hash, nil
+}
+
+func (c *CreateTimelineItem) LastState() Comment {
+	if len(c.History) == 0 {
+		panic("no history yet")
+	}
+
+	return c.History[len(c.History)-1]
+}
+
+// CommentTimelineItem replace a Comment in the Timeline and hold its edition history
+type CommentTimelineItem struct {
+	hash    git.Hash
+	History []Comment
+}
+
+func NewCommentTimelineItem(hash git.Hash, comment Comment) *CommentTimelineItem {
+	return &CommentTimelineItem{
+		hash: hash,
+		History: []Comment{
+			comment,
+		},
+	}
+}
+
+func (c *CommentTimelineItem) Hash() (git.Hash, error) {
+	return c.hash, nil
+}
+
+func (c *CommentTimelineItem) LastState() Comment {
+	if len(c.History) == 0 {
+		panic("no history yet")
+	}
+
+	return c.History[len(c.History)-1]
+}