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Detect Gmail labels from All Mail mbox export

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This commit is contained in:
Michal Horejsek
2020-10-08 15:03:03 +02:00
parent 719d369c2a
commit ef85c8df24
16 changed files with 461 additions and 73 deletions
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133
internal/transfer/provider_mbox_source.go
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@ -34,7 +34,7 @@ func (p *MBOXProvider) TransferTo(rules transferRules, progress *Progress, ch ch
log.Info("Started transfer from MBOX to channel")
defer log.Info("Finished transfer from MBOX to channel")
filePathsPerFolder, err := p.getFilePathsPerFolder(rules)
filePathsPerFolder, err := p.getFilePathsPerFolder()
if err != nil {
progress.fatal(err)
return
@ -45,31 +45,28 @@ func (p *MBOXProvider) TransferTo(rules transferRules, progress *Progress, ch ch
}
for folderName, filePaths := range filePathsPerFolder {
// No error guaranteed by getFilePathsPerFolder.
rule, _ := rules.getRuleBySourceMailboxName(folderName)
log.WithField("folder", folderName).Debug("Estimating folder counts")
for _, filePath := range filePaths {
if progress.shouldStop() {
break
}
p.updateCount(rule, progress, filePath)
p.updateCount(progress, filePath)
}
}
progress.countsFinal()
for folderName, filePaths := range filePathsPerFolder {
// No error guaranteed by getFilePathsPerFolder.
rule, _ := rules.getRuleBySourceMailboxName(folderName)
log.WithField("rule", rule).Debug("Processing rule")
log.WithField("folder", folderName).Debug("Processing folder")
for _, filePath := range filePaths {
if progress.shouldStop() {
break
}
p.transferTo(rule, progress, ch, filePath)
p.transferTo(rules, progress, ch, folderName, filePath)
}
}
}
func (p *MBOXProvider) getFilePathsPerFolder(rules transferRules) (map[string][]string, error) {
func (p *MBOXProvider) getFilePathsPerFolder() (map[string][]string, error) {
filePaths, err := getFilePathsWithSuffix(p.root, ".mbox")
if err != nil {
return nil, err
@ -79,18 +76,12 @@ func (p *MBOXProvider) getFilePathsPerFolder(rules transferRules) (map[string][]
for _, filePath := range filePaths {
fileName := filepath.Base(filePath)
folder := strings.TrimSuffix(fileName, ".mbox")
_, err := rules.getRuleBySourceMailboxName(folder)
if err != nil {
log.WithField("msg", filePath).Trace("Mailbox skipped due to folder name")
continue
}
filePathsMap[folder] = append(filePathsMap[folder], filePath)
}
return filePathsMap, nil
}
func (p *MBOXProvider) updateCount(rule *Rule, progress *Progress, filePath string) {
func (p *MBOXProvider) updateCount(progress *Progress, filePath string) {
mboxReader := p.openMbox(progress, filePath)
if mboxReader == nil {
return
@ -107,10 +98,10 @@ func (p *MBOXProvider) updateCount(rule *Rule, progress *Progress, filePath stri
}
count++
}
progress.updateCount(rule.SourceMailbox.Name, uint(count))
progress.updateCount(filePath, uint(count))
}
func (p *MBOXProvider) transferTo(rule *Rule, progress *Progress, ch chan<- Message, filePath string) {
func (p *MBOXProvider) transferTo(rules transferRules, progress *Progress, ch chan<- Message, folderName, filePath string) {
mboxReader := p.openMbox(progress, filePath)
if mboxReader == nil {
return
@ -134,50 +125,122 @@ func (p *MBOXProvider) transferTo(rule *Rule, progress *Progress, ch chan<- Mess
break
}
msg, err := p.exportMessage(rule, id, msgReader)
msg, err := p.exportMessage(rules, folderName, id, msgReader)
// Read and check time in body only if the rule specifies it
// to not waste energy.
if err == nil && rule.HasTimeLimit() {
msgTime, msgTimeErr := getMessageTime(msg.Body)
if msgTimeErr != nil {
err = msgTimeErr
} else if !rule.isTimeInRange(msgTime) {
log.WithField("msg", id).Debug("Message skipped due to time")
continue
}
if err == nil && len(msg.Targets) == 0 {
// Here should be called progress.messageSkipped(id) once we have
// this feature, and following progress.updateCount can be removed.
continue
}
// Counting only messages filtered by time to update count to correct total.
count++
// addMessage is called after time check to not report message
// which should not be exported but any error from reading body
// or parsing time is reported as an error.
progress.addMessage(id, rule)
progress.addMessage(id, msg.sourceNames(), msg.targetNames())
progress.messageExported(id, msg.Body, err)
if err == nil {
ch <- msg
}
}
progress.updateCount(rule.SourceMailbox.Name, uint(count))
progress.updateCount(filePath, uint(count))
}
func (p *MBOXProvider) exportMessage(rule *Rule, id string, msgReader io.Reader) (Message, error) {
func (p *MBOXProvider) exportMessage(rules transferRules, folderName, id string, msgReader io.Reader) (Message, error) {
body, err := ioutil.ReadAll(msgReader)
if err != nil {
return Message{}, errors.Wrap(err, "failed to read message")
}
msgRules := p.getMessageRules(rules, folderName, id, body)
sources := p.getMessageSources(msgRules)
targets := p.getMessageTargets(msgRules, id, body)
return Message{
ID: id,
Unread: false,
Body: body,
Source: rule.SourceMailbox,
Targets: rule.TargetMailboxes,
Sources: sources,
Targets: targets,
}, nil
}
func (p *MBOXProvider) getMessageRules(rules transferRules, folderName, id string, body []byte) []*Rule {
msgRules := []*Rule{}
folderRule, err := rules.getRuleBySourceMailboxName(folderName)
if err != nil {
log.WithField("msg", id).WithField("source", folderName).Debug("Message skipped due to source")
} else {
msgRules = append(msgRules, folderRule)
}
gmailLabels, err := getGmailLabelsFromMessage(body)
if err != nil {
log.WithError(err).Error("Failed to get gmail labels, ")
} else {
for _, label := range gmailLabels {
rule, err := rules.getRuleBySourceMailboxName(label)
if err != nil {
log.WithField("msg", id).WithField("source", label).Debug("Message skipped due to source")
continue
}
msgRules = append(msgRules, rule)
}
}
return msgRules
}
func (p *MBOXProvider) getMessageSources(msgRules []*Rule) []Mailbox {
sources := []Mailbox{}
for _, rule := range msgRules {
sources = append(sources, rule.SourceMailbox)
}
return sources
}
func (p *MBOXProvider) getMessageTargets(msgRules []*Rule, id string, body []byte) []Mailbox {
targets := []Mailbox{}
haveExclusiveMailbox := false
for _, rule := range msgRules {
// Read and check time in body only if the rule specifies it
// to not waste energy.
if rule.HasTimeLimit() {
msgTime, err := getMessageTime(body)
if err != nil {
log.WithError(err).Error("Failed to parse time, time check skipped")
} else if !rule.isTimeInRange(msgTime) {
log.WithField("msg", id).WithField("source", rule.SourceMailbox.Name).Debug("Message skipped due to time")
continue
}
}
for _, newTarget := range rule.TargetMailboxes {
// msgRules is sorted. The first rule is based on the folder name,
// followed by the order from X-Gmail-Labels. The rule based on
// the folder name should have priority for exclusive target.
if newTarget.IsExclusive && haveExclusiveMailbox {
continue
}
found := false
for _, target := range targets {
if target.Hash() == newTarget.Hash() {
found = true
break
}
}
if found {
continue
}
if newTarget.IsExclusive {
haveExclusiveMailbox = true
}
targets = append(targets, newTarget)
}
}
return targets
}
func (p *MBOXProvider) openMbox(progress *Progress, mboxPath string) *mbox.Reader {
mboxPath = filepath.Join(p.root, mboxPath)
mboxFile, err := os.Open(mboxPath) //nolint[gosec]