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|
package msgview
import (
"errors"
"fmt"
"io"
"os"
"path/filepath"
"strings"
"time"
"git.sr.ht/~sircmpwn/getopt"
"github.com/mitchellh/go-homedir"
"git.sr.ht/~sircmpwn/aerc/commands"
"git.sr.ht/~sircmpwn/aerc/models"
"git.sr.ht/~sircmpwn/aerc/widgets"
)
type Save struct{}
func init() {
register(Save{})
}
func (Save) Aliases() []string {
return []string{"save"}
}
func (Save) Complete(aerc *widgets.Aerc, args []string) []string {
path := strings.Join(args, " ")
return commands.CompletePath(path)
}
func (Save) Execute(aerc *widgets.Aerc, args []string) error {
opts, optind, err := getopt.Getopts(args, "fp")
if err != nil {
return err
}
var (
force bool
createDirs bool
trailingSlash bool
)
for _, opt := range opts {
switch opt.Option {
case 'f':
force = true
case 'p':
createDirs = true
}
}
defaultPath := aerc.Config().General.DefaultSavePath
// we either need a path or a defaultPath
if defaultPath == "" && len(args) == optind {
return errors.New("Usage: :save [-fp] <path>")
}
// as a convenience we join with spaces, so that the user doesn't need to
// quote filenames containing spaces
path := strings.Join(args[optind:], " ")
// needs to be determined prior to calling filepath.Clean / filepath.Join
// it gets stripped by Clean.
// we auto generate a name if a directory was given
if len(path) > 0 {
trailingSlash = path[len(path)-1] == '/'
} else if len(defaultPath) > 0 && len(path) == 0 {
// empty path, so we might have a default that ends in a trailingSlash
trailingSlash = defaultPath[len(defaultPath)-1] == '/'
}
// Absolute paths are taken as is so that the user can override the default
// if they want to
if !isAbsPath(path) {
path = filepath.Join(defaultPath, path)
}
path, err = homedir.Expand(path)
if err != nil {
return err
}
mv, ok := aerc.SelectedTab().(*widgets.MessageViewer)
if !ok {
return fmt.Errorf("SelectedTab is not a MessageViewer")
}
pi := mv.SelectedMessagePart()
if trailingSlash || isDirExists(path) {
filename := generateFilename(pi.Part)
path = filepath.Join(path, filename)
}
dir := filepath.Dir(path)
if createDirs && dir != "" {
err := os.MkdirAll(dir, 0755)
if err != nil {
return err
}
}
if pathExists(path) && !force {
return fmt.Errorf("%q already exists and -f not given", path)
}
ch := make(chan error, 1)
store := mv.Store()
store.FetchBodyPart(pi.Msg.Uid, pi.Index, func(reader io.Reader) {
f, err := os.Create(path)
if err != nil {
ch <- err
return
}
defer f.Close()
_, err = io.Copy(f, reader)
if err != nil {
ch <- err
return
}
ch <- nil
})
// we need to wait for the callback prior to displaying a result
go func() {
err := <-ch
if err != nil {
aerc.PushError(fmt.Sprintf("Save failed: %v", err))
return
}
aerc.PushStatus("Saved to "+path, 10*time.Second)
}()
return nil
}
//isDir returns true if path is a directory and exists
func isDirExists(path string) bool {
pathinfo, err := os.Stat(path)
if err != nil {
return false // we don't really care
}
if pathinfo.IsDir() {
return true
}
return false
}
//pathExists returns true if path exists
func pathExists(path string) bool {
_, err := os.Stat(path)
if err != nil {
return false // we don't really care why it failed
}
return true
}
//isAbsPath returns true if path given is anchored to / or . or ~
func isAbsPath(path string) bool {
if len(path) == 0 {
return false
}
switch path[0] {
case '/':
return true
case '.':
return true
case '~':
return true
default:
return false
}
}
// generateFilename tries to get the filename from the given part.
// if that fails it will fallback to a generated one based on the date
func generateFilename(part *models.BodyStructure) string {
var filename string
if fn, ok := part.DispositionParams["filename"]; ok {
filename = fn
} else if fn, ok := part.Params["name"]; ok {
filename = fn
}
// Some MUAs send attachments with names like /some/stupid/idea/happy.jpeg
// Assuming non hostile intent it does make sense to use just the last
// portion of the pathname as the filename for saving it.
filename = filename[strings.LastIndex(filename, "/")+1:]
switch filename {
case "", ".", "..":
timestamp := time.Now().Format("2006-01-02-150405")
filename = fmt.Sprintf("aerc_%v", timestamp)
default:
// already have a valid name
}
return filename
}
|
