/
savepath_recorder.go
60 lines (49 loc) · 1.42 KB
/
savepath_recorder.go
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package widgets
import (
"errors"
"os"
"path/filepath"
)
// SavePathRecorder 缓存用户上一次保存文件的目录,通过服务名称获取目录数据
type SavePathRecorder struct {
recorder map[string]string
}
// 记录用户上次保存文件的目录
var pathRecorder = NewSavePathRecorder()
func NewSavePathRecorder() *SavePathRecorder {
recorder := &SavePathRecorder{
recorder: make(map[string]string),
}
return recorder
}
// LastSavePath 根据service返回上次保存文件的目录,service不存在则返回false
func (r *SavePathRecorder) LastSavePath(service string) (string, bool) {
path, ok := r.recorder[service]
return path, ok
}
// SetLastSavePath 设置service上一次保存文件的目录
// service不能为空
func (r *SavePathRecorder) SetLastSavePath(service, path string) error {
if service == "" {
return errors.New("empty service")
}
path = filepath.Dir(path)
r.recorder[service] = path
return nil
}
// defaultSavePath 返回文件默认存储位置
// 优先选择上次保存文件的目录(仅限本次会话期间)
// 否则选择$HOME
func defaultSavePath(service, fileName string) (string, error) {
savePath, ok := pathRecorder.LastSavePath(service)
if !ok {
home := os.Getenv("HOME")
if home == "" {
return "", errors.New("无法获取HOME")
}
savePath = filepath.Join(home, fileName)
} else {
savePath = filepath.Join(savePath, fileName)
}
return savePath, nil
}