Add parent property to blocks (#28)

block.go

@@ -10,6 +10,7 @@ import (
 // See: https://developers.notion.com/reference/block
 type Block interface {
 	ID() string
+	Parent() Parent
 	CreatedTime() time.Time
 	LastEditedTime() time.Time
 	HasChildren() bool
@@ -19,6 +20,7 @@ type Block interface {
 
 type blockDTO struct {
 	ID             string     `json:"id,omitempty"`
+	Parent         *Parent    `json:"parent,omitempty"`
 	Type           BlockType  `json:"type,omitempty"`
 	CreatedTime    *time.Time `json:"created_time,omitempty"`
 	LastEditedTime *time.Time `json:"last_edited_time,omitempty"`
@@ -60,6 +62,7 @@ type blockDTO struct {
 
 type baseBlock struct {
 	id             string
+	parent         Parent
 	createdTime    time.Time
 	lastEditedTime time.Time
 	hasChildren    bool
@@ -87,6 +90,10 @@ func (b baseBlock) Archived() bool {
 	return b.archived
 }
 
+func (b baseBlock) Parent() Parent {
+	return b.parent
+}
+
 type ParagraphBlock struct {
 	baseBlock
 
@@ -831,6 +838,10 @@ func (dto blockDTO) Block() Block {
 		hasChildren: dto.HasChildren,
 	}
 
+	if dto.Parent != nil {
+		baseBlock.parent = *dto.Parent
+	}
+
 	if dto.CreatedTime != nil {
 		baseBlock.createdTime = *dto.CreatedTime
 	}

client_test.go

@@ -3998,6 +3998,7 @@ func TestFindBlockByID(t *testing.T) {
 		respStatusCode    int
 		expBlock          notion.Block
 		expID             string
+		expParent         notion.Parent
 		expCreatedTime    time.Time
 		expLastEditedTime time.Time
 		expHasChildren    bool
@@ -4012,6 +4013,10 @@ func TestFindBlockByID(t *testing.T) {
 					`{
 						"object": "block",
 						"id": "048e165e-352d-4119-8128-e46c3527d95c",
+						"parent": {
+							"type": "page_id",
+							"page_id": "59833787-2cf9-4fdf-8782-e53db20768a5"
+						},
 						"created_time": "2021-10-02T06:09:00.000Z",
 						"last_edited_time": "2021-10-02T06:31:00.000Z",
 						"has_children": true,
@@ -4028,6 +4033,10 @@ func TestFindBlockByID(t *testing.T) {
 				Title: "test title",
 			},
 			expID: "048e165e-352d-4119-8128-e46c3527d95c",
+			expParent: notion.Parent{
+				Type:   notion.ParentTypePage,
+				PageID: "59833787-2cf9-4fdf-8782-e53db20768a5",
+			},
 			expCreatedTime:    mustParseTime(time.RFC3339, "2021-10-02T06:09:00Z"),
 			expLastEditedTime: mustParseTime(time.RFC3339, "2021-10-02T06:31:00Z"),
 			expHasChildren:    true,
@@ -4088,6 +4097,10 @@ func TestFindBlockByID(t *testing.T) {
 					t.Fatalf("id not equal (expected: %v, got: %v)", tt.expID, block.ID())
 				}
 
+				if tt.expParent != block.Parent() {
+					t.Fatalf("parent not equal (expected: %+v, got: %+v)", tt.expParent, block.Parent())
+				}
+
 				if tt.expCreatedTime != block.CreatedTime() {
 					t.Fatalf("createdTime not equal (expected: %v, got: %v)", tt.expCreatedTime, block.CreatedTime())
 				}

parent.go

@@ -3,6 +3,7 @@ package notion
 type Parent struct {
 	Type ParentType `json:"type,omitempty"`
 
+	BlockID    string `json:"block_id,omitempty"`
 	PageID     string `json:"page_id,omitempty"`
 	DatabaseID string `json:"database_id,omitempty"`
 	Workspace  bool   `json:"workspace,omitempty"`