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package account
import (
"errors"
"fmt"
"os"
"path/filepath"
"sync"
"time"
"git.sr.ht/~rjarry/aerc/logging"
"git.sr.ht/~rjarry/aerc/widgets"
mboxer "git.sr.ht/~rjarry/aerc/worker/mbox"
"git.sr.ht/~rjarry/aerc/worker/types"
)
type ExportMbox struct{}
func init() {
register(ExportMbox{})
}
func (ExportMbox) Aliases() []string {
return []string{"export-mbox"}
}
func (ExportMbox) Complete(aerc *widgets.Aerc, args []string) []string {
if acct := aerc.SelectedAccount(); acct != nil {
if path := acct.SelectedDirectory(); path != "" {
if f := filepath.Base(path); f != "" {
return []string{f + ".mbox"}
}
}
}
return nil
}
func (ExportMbox) Execute(aerc *widgets.Aerc, args []string) error {
if len(args) != 2 {
return exportFolderUsage(args[0])
}
filename := args[1]
acct := aerc.SelectedAccount()
if acct == nil {
return errors.New("No account selected")
}
store := acct.Store()
if store == nil {
return errors.New("No message store selected")
}
aerc.PushStatus("Exporting to "+filename, 10*time.Second)
go func() {
file, err := os.Create(filename)
if err != nil {
logging.Errorf("failed to create file: %v", err)
aerc.PushError(err.Error())
return
}
defer file.Close()
var mu sync.Mutex
var ctr uint32
var retries int
done := make(chan bool)
uids := make([]uint32, len(store.Uids()))
copy(uids, store.Uids())
t := time.Now()
for len(uids) > 0 {
if retries > 0 {
if retries > 10 {
errorMsg := fmt.Sprintf("too many retries: %d; stopping export", retries)
logging.Errorf(errorMsg)
aerc.PushError(args[0] + " " + errorMsg)
break
}
sleeping := time.Duration(retries * 1e9 * 2)
logging.Debugf("sleeping for %s before retrying; retries: %d", sleeping, retries)
time.Sleep(sleeping)
}
logging.Debugf("fetching %d for export", len(uids))
acct.Worker().PostAction(&types.FetchFullMessages{
Uids: uids,
}, func(msg types.WorkerMessage) {
switch msg := msg.(type) {
case *types.Done:
done <- true
case *types.Error:
logging.Errorf("failed to fetch message: %v", msg.Error)
aerc.PushError(args[0] + " error encountered: " + msg.Error.Error())
done <- false
case *types.FullMessage:
mu.Lock()
mboxer.Write(file, msg.Content.Reader, "", t)
for i, uid := range uids {
if uid == msg.Content.Uid {
uids = append(uids[:i], uids[i+1:]...)
break
}
}
ctr++
mu.Unlock()
}
})
if ok := <-done; ok {
break
}
retries++
}
statusInfo := fmt.Sprintf("Exported %d of %d messages to %s.", ctr, len(store.Uids()), filename)
aerc.PushStatus(statusInfo, 10*time.Second)
logging.Infof(statusInfo)
}()
return nil
}
func exportFolderUsage(cmd string) error {
return fmt.Errorf("Usage: %s <filename>", cmd)
}
|
