初始化项目框架，完成部分接口开发

internal/logic/user_follow_author/user_follow_author.go

@@ -0,0 +1,66 @@
+package user_follow_author
+
+import (
+	"context"
+	"server/internal/dao"
+	"server/internal/model"
+	"server/internal/model/do"
+	"server/utility/ecode"
+)
+
+type sUserFollowAuthor struct{}
+
+// List retrieves a paginated list of user follow authors
+func (s *sUserFollowAuthor) List(ctx context.Context, in *model.UserFollowAuthorListIn) (out *model.UserFollowAuthorListOut, err error) {
+	out = &model.UserFollowAuthorListOut{}
+	m := dao.UserFollowAuthors.Ctx(ctx)
+	if in.UserId != 0 {
+		m = m.Where(dao.UserFollowAuthors.Columns().UserId, in.UserId)
+	}
+	if in.AuthorId != 0 {
+		m = m.Where(dao.UserFollowAuthors.Columns().AuthorId, in.AuthorId)
+	}
+	if err = m.Page(in.Page, in.Size).ScanAndCount(&out.List, &out.Total, false); err != nil {
+		return
+	}
+	return
+}
+
+// Create adds a new user follow author
+func (s *sUserFollowAuthor) Create(ctx context.Context, in *model.UserFollowAuthorAddIn) (out *model.UserFollowAuthorCRUDOut, err error) {
+	exist, err := dao.UserFollowAuthors.Ctx(ctx).
+		Where(dao.UserFollowAuthors.Columns().UserId, in.UserId).
+		Where(dao.UserFollowAuthors.Columns().AuthorId, in.AuthorId).
+		Exist()
+	if err != nil {
+		return nil, ecode.Fail.Sub("user_follow_author_query_failed")
+	}
+	if exist {
+		return nil, ecode.Params.Sub("user_follow_author_exists")
+	}
+	if _, err := dao.UserFollowAuthors.Ctx(ctx).Data(do.UserFollowAuthors{
+		UserId:   in.UserId,
+		AuthorId: in.AuthorId,
+	}).Insert(); err != nil {
+		return nil, ecode.Fail.Sub("user_follow_author_create_failed")
+	}
+	return &model.UserFollowAuthorCRUDOut{Success: true}, nil
+}
+
+// Delete removes a user follow author by id
+func (s *sUserFollowAuthor) Delete(ctx context.Context, in *model.UserFollowAuthorDelIn) (out *model.UserFollowAuthorCRUDOut, err error) {
+	exist, err := dao.UserFollowAuthors.Ctx(ctx).
+		WherePri(in.Id).
+		Exist()
+	if err != nil {
+		return nil, ecode.Fail.Sub("user_follow_author_query_failed")
+	}
+	if !exist {
+		return nil, ecode.NotFound.Sub("user_follow_author_not_found")
+	}
+	_, err = dao.UserFollowAuthors.Ctx(ctx).WherePri(in.Id).Delete()
+	if err != nil {
+		return nil, ecode.Fail.Sub("user_follow_author_delete_failed")
+	}
+	return &model.UserFollowAuthorCRUDOut{Success: true}, nil
+}