add new item types to support stars

item.go

@@ -4,6 +4,9 @@ const (
 	TYPE_MESSAGE      = "message"
 	TYPE_FILE         = "file"
 	TYPE_FILE_COMMENT = "file_comment"
+	TYPE_CHANNEL      = "channel"
+	TYPE_IM           = "im"
+	TYPE_GROUP        = "group"
 )
 
 // Item is any type of slack message - message, file, or file comment.
@@ -30,6 +33,21 @@ func NewFileCommentItem(f *File, c *Comment) Item {
 	return Item{Type: TYPE_FILE_COMMENT, File: f, Comment: c}
 }
 
+// NewChannelItem turns a channel id into a typed channel struct.
+func NewChannelItem(ch string) Item {
+	return Item{Type: TYPE_CHANNEL, Channel: ch}
+}
+
+// NewIMItem turns a channel id into a typed im struct.
+func NewIMItem(ch string) Item {
+	return Item{Type: TYPE_IM, Channel: ch}
+}
+
+// NewGroupItem turns a channel id into a typed group struct.
+func NewGroupItem(ch string) Item {
+	return Item{Type: TYPE_GROUP, Channel: ch}
+}
+
 // ItemRef is a reference to a message of any type. One of FileID,
 // CommentId, or the combination of ChannelId and Timestamp must be
 // specified.

item_test.go

@@ -43,6 +43,39 @@ func TestNewFileCommentItem(t *testing.T) {
 	}
 }
 
+func TestNewChannelItem(t *testing.T) {
+	c := "C1"
+	ci := NewChannelItem(c)
+	if ci.Type != TYPE_CHANNEL {
+		t.Errorf("got Type %s, want %s", ci.Type, TYPE_CHANNEL)
+	}
+	if ci.Channel != "C1" {
+		t.Errorf("got Channel %v, want %v", ci.Channel, "C1")
+	}
+}
+
+func TestNewIMItem(t *testing.T) {
+	c := "D1"
+	ci := NewIMItem(c)
+	if ci.Type != TYPE_IM {
+		t.Errorf("got Type %s, want %s", ci.Type, TYPE_IM)
+	}
+	if ci.Channel != "D1" {
+		t.Errorf("got Channel %v, want %v", ci.Channel, "D1")
+	}
+}
+
+func TestNewGroupItem(t *testing.T) {
+	c := "G1"
+	ci := NewGroupItem(c)
+	if ci.Type != TYPE_GROUP {
+		t.Errorf("got Type %s, want %s", ci.Type, TYPE_GROUP)
+	}
+	if ci.Channel != "G1" {
+		t.Errorf("got Channel %v, want %v", ci.Channel, "G1")
+	}
+}
+
 func TestNewRefToMessage(t *testing.T) {
 	ref := NewRefToMessage("chan", "ts")
 	if got, want := ref.ChannelId, "chan"; got != want {