add create post error

x/blog/keeper/msg_server_create_post.go

@@ -12,7 +12,6 @@ import (
 func (k msgServer) CreatePost(goCtx context.Context, msg *types.MsgCreatePost) (*types.MsgCreatePostResponse, error) {
 	ctx := sdk.UnwrapSDKContext(goCtx)
 
-	// TODO: Handling the message
 	postCount, found := k.Keeper.GetPostCount(ctx)
 	if !found {
 		panic("postCount is not found")
@@ -25,6 +24,11 @@ func (k msgServer) CreatePost(goCtx context.Context, msg *types.MsgCreatePost) (
 		Body:  msg.Body,
 	}
 
+	err := storedPost.Validate()
+	if err != nil {
+		return nil, err
+	}
+
 	k.Keeper.SetStoredPost(ctx, storedPost)
 	postCount.Count++
 	k.Keeper.SetPostCount(ctx, postCount)

x/blog/keeper/msg_server_create_post_test.go

@@ -29,3 +29,23 @@ func TestCreatePostSuccess(t *testing.T) {
 		PostIndex: "0",
 	}, *createResponse)
 }
+
+func TestCreatePostBadTitle(t *testing.T) {
+	msgServer, _, context := setupMsgServerCreatePost(t)
+	createResponse, err := msgServer.CreatePost(context, &types.MsgCreatePost{
+		Title: "",
+		Body:  "This is a test",
+	})
+	require.Nil(t, createResponse)
+	require.EqualError(t, err, "index = 0: title is missing")
+}
+
+func TestCreatePostBadBody(t *testing.T) {
+	msgServer, _, context := setupMsgServerCreatePost(t)
+	createResponse, err := msgServer.CreatePost(context, &types.MsgCreatePost{
+		Title: "Test",
+		Body:  "",
+	})
+	require.Nil(t, createResponse)
+	require.EqualError(t, err, "index = 0: body is missing")
+}

x/blog/types/errors.go

@@ -8,5 +8,7 @@ import (
 
 // x/blog module sentinel errors
 var (
-	ErrSample = sdkerrors.Register(ModuleName, 1100, "sample error")
+	ErrSample           = sdkerrors.Register(ModuleName, 1100, "sample error")
+	ErrMissingPostTitle = sdkerrors.Register(ModuleName, 1101, "title is missing")
+	ErrMissingPostBody  = sdkerrors.Register(ModuleName, 1102, "body is missing")
 )

x/blog/types/full_post.go

@@ -0,0 +1,29 @@
+package types
+
+import "fmt"
+
+func (storedPost StoredPost) GetPostTitle() (title string, err error) {
+	if len(storedPost.Title) <= 0 {
+		return title, ErrMissingPostTitle.Wrap(fmt.Sprintf("index = %s", storedPost.Index))
+	}
+	return title, nil
+}
+
+func (storedPost StoredPost) GetPostBody() (body string, err error) {
+	if len(storedPost.Body) <= 0 {
+		return body, ErrMissingPostBody.Wrap(fmt.Sprintf("index = %s", storedPost.Index))
+	}
+	return body, nil
+}
+
+func (storedPost StoredPost) Validate() (err error) {
+	_, err = storedPost.GetPostTitle()
+	if err != nil {
+		return err
+	}
+	_, err = storedPost.GetPostBody()
+	if err != nil {
+		return err
+	}
+	return err
+}