move packages to src

src/storage/folder.go

@@ -0,0 +1,84 @@
+package storage
+
+import (
+	"fmt"
+)
+
+type Folder struct {
+	Id         int64  `json:"id"`
+	Title      string `json:"title"`
+	IsExpanded bool   `json:"is_expanded"`
+}
+
+func (s *Storage) CreateFolder(title string) *Folder {
+	expanded := true
+	result, err := s.db.Exec(`
+		insert into folders (title, is_expanded) values (?, ?)
+		on conflict (title) do nothing`,
+		title, expanded,
+	)
+	if err != nil {
+		fmt.Println(err)
+		return nil
+	}
+
+	var id int64
+	numrows, err := result.RowsAffected()
+	if err != nil {
+		s.log.Print(err)
+		return nil
+	}
+	if numrows == 1 {
+		id, err = result.LastInsertId()
+		if err != nil {
+			s.log.Print(err)
+			return nil
+		}
+	} else {
+		err = s.db.QueryRow(`select id, is_expanded from folders where title=?`, title).Scan(&id, &expanded)
+		if err != nil {
+			s.log.Print(err)
+			return nil
+		}
+	}
+	return &Folder{Id: id, Title: title, IsExpanded: expanded}
+}
+
+func (s *Storage) DeleteFolder(folderId int64) bool {
+	_, err1 := s.db.Exec(`update feeds set folder_id = null where folder_id = ?`, folderId)
+	_, err2 := s.db.Exec(`delete from folders where id = ?`, folderId)
+	return err1 == nil && err2 == nil
+}
+
+func (s *Storage) RenameFolder(folderId int64, newTitle string) bool {
+	_, err := s.db.Exec(`update folders set title = ? where id = ?`, newTitle, folderId)
+	return err == nil
+}
+
+func (s *Storage) ToggleFolderExpanded(folderId int64, isExpanded bool) bool {
+	_, err := s.db.Exec(`update folders set is_expanded = ? where id = ?`, isExpanded, folderId)
+	return err == nil
+}
+
+func (s *Storage) ListFolders() []Folder {
+	result := make([]Folder, 0, 0)
+	rows, err := s.db.Query(`
+		select id, title, is_expanded
+		from folders
+		order by title collate nocase
+	`)
+	if err != nil {
+		s.log.Print(err)
+		return result
+	}
+	for rows.Next() {
+		var f Folder
+		err = rows.Scan(&f.Id, &f.Title, &f.IsExpanded)
+		if err != nil {
+			s.log.Print(err)
+			return result
+		}
+		result = append(result, f)
+	}
+	return result
+}