//go:build notmuch
// +build notmuch
package lib
import (
"errors"
"fmt"
"time"
"git.sr.ht/~rjarry/aerc/lib/uidstore"
"git.sr.ht/~rjarry/aerc/logging"
"git.sr.ht/~rjarry/aerc/worker/types"
notmuch "github.com/zenhack/go.notmuch"
)
const MAX_DB_AGE time.Duration = 10 * time.Second
type DB struct {
path string
excludedTags []string
lastOpenTime time.Time
db *notmuch.DB
uidStore *uidstore.Store
}
func NewDB(path string, excludedTags []string) *DB {
db := &DB{
path: path,
excludedTags: excludedTags,
uidStore: uidstore.NewStore(),
}
return db
}
func (db *DB) Connect() error {
// used as sanity check upon initial connect
err := db.connect(false)
return err
}
func (db *DB) close() error {
if db.db == nil {
return nil
}
err := db.db.Close()
db.db = nil
return err
}
func (db *DB) connect(writable bool) error {
var mode notmuch.DBMode = notmuch.DBReadOnly
if writable {
mode = notmuch.DBReadWrite
}
var err error
db.db, err = notmuch.Open(db.path, mode)
if err != nil {
return fmt.Errorf("could not connect to notmuch db: %w", err)
}
db.lastOpenTime = time.Now()
return nil
}
// withConnection calls callback on the DB object, cleaning up upon return.
// the error returned is from the connection attempt, if not successful,
// or from the callback otherwise.
func (db *DB) withConnection(writable bool, cb func(*notmuch.DB) error) error {
too_old := time.Now().After(db.lastOpenTime.Add(MAX_DB_AGE))
if db.db == nil || writable || too_old {
if cerr := db.close(); cerr != nil {
logging.Errorf("failed to close the notmuch db: %v", cerr)
}
err := db.connect(writable)
if err != nil {
logging.Errorf("failed to open the notmuch db: %v", err)
return err
}
}
err := cb(db.db)
if writable {
// we need to close to commit the changes, else we block others
if cerr := db.close(); cerr != nil {
logging.Errorf("failed to close the notmuch db: %v", cerr)
}
}
return err
}
// ListTags lists all known tags
func (db *DB) ListTags() ([]string, error) {
var result []string
err := db.withConnection(false, func(ndb *notmuch.DB) error {
tags, err := ndb.Tags()
if err != nil {
return err
}
defer tags.Close()
var tag *notmuch.Tag
for tags.Next(&tag) {
result = append(result, tag.Value)
}
return nil
})
return result, err
}
// getQuery returns a query based on the provided query string.
// It also configures the query as specified on the worker
func (db *DB) newQuery(ndb *notmuch.DB, query string) (*notmuch.Query, error) {
q := ndb.NewQuery(query)
q.SetExcludeScheme(notmuch.EXCLUDE_ALL)
q.SetSortScheme(notmuch.SORT_OLDEST_FIRST)
for _, t := range db.excludedTags {
err := q.AddTagExclude(t)
if errors.Is(err, notmuch.ErrIgnored) {
return nil, err
}
}
return q, nil
}
func (db *DB) MsgIDsFromQuery(q string) ([]string, error) {
var msgIDs []string
err := db.withConnection(false, func(ndb *notmuch.DB) error {
query, err := db.newQuery(ndb, q)
if err != nil {
return err
}
defer query.Close()
msgIDs, err = msgIdsFromQuery(query)
return err
})
return msgIDs, err
}
func (db *DB) ThreadsFromQuery(q string) ([]*types.Thread, error) {
var res []*types.Thread
err := db.withConnection(false, func(ndb *notmuch.DB) error {
query, err := db.newQuery(ndb, q)
if err != nil {
return err
}
defer query.Close()
qMsgIDs, err := msgIdsFromQuery(query)
if err != nil {
return err
}
valid := make(map[string]struct{})
for _, id := range qMsgIDs {
valid[id] = struct{}{}
}
threads, err := query.Threads()
if err != nil {
return err
}
defer threads.Close()
res, err = db.enumerateThread(threads, valid)
return err
})
return res, err
}
type MessageCount struct {
Exists int
Unread int
}
func (db *DB) QueryCountMessages(q string) (MessageCount, error) {
var (
exists int
unread int
)
err := db.withConnection(false, func(ndb *notmuch.DB) error {
query, err := db.newQuery(ndb, q)
if err != nil {
return err
}
exists = query.CountMessages()
query.Close()
uq, err := db.newQuery(ndb, fmt.Sprintf("(%v) and (tag:unread)", q))
if err != nil {
return err
}
defer uq.Close()
unread = uq.CountMessages()
return nil
})
return MessageCount{
Exists: exists,
Unread: unread,
}, err
}
func (db *DB) MsgFilename(key string) (string, error) {
var filename string
err := db.withConnection(false, func(ndb *notmuch.DB) error {
msg, err := ndb.FindMessage(key)
if err != nil {
return err
}
defer msg.Close()
filename = msg.Filename()
return nil
})
return filename, err
}
func (db *DB) MsgTags(key string) ([]string, error) {
var tags []string
err := db.withConnection(false, func(ndb *notmuch.DB) error {
msg, err := ndb.FindMessage(key)
if err != nil {
return err
}
defer msg.Close()
ts := msg.Tags()
defer ts.Close()
var tag *notmuch.Tag
for ts.Next(&tag) {
tags = append(tags, tag.Value)
}
return nil
})
return tags, err
}
func (db *DB) msgModify(key string,
cb func(*notmuch.Message) error,
) error {
err := db.withConnection(true, func(ndb *notmuch.DB) error {
msg, err := ndb.FindMessage(key)
if err != nil {
return err
}
defer msg.Close()
err = cb(msg)
if err != nil {
logging.Warnf("callback failed: %v", err)
}
err = msg.TagsToMaildirFlags()
if err != nil {
logging.Errorf("could not sync maildir flags: %v", err)
}
return nil
})
return err
}
func (db *DB) MsgModifyTags(key string, add, remove []string) error {
err := db.msgModify(key, func(msg *notmuch.Message) error {
ierr := msg.Atomic(func(msg *notmuch.Message) {
for _, t := range add {
err := msg.AddTag(t)
if err != nil {
logging.Warnf("failed to add tag: %v", err)
}
}
for _, t := range remove {
err := msg.RemoveTag(t)
if err != nil {
logging.Warnf("failed to add tag: %v", err)
}
}
})
return ierr
})
return err
}
func msgIdsFromQuery(query *notmuch.Query) ([]string, error) {
var msgIDs []string
msgs, err := query.Messages()
if err != nil {
return nil, err
}
defer msgs.Close()
var msg *notmuch.Message
for msgs.Next(&msg) {
msgIDs = append(msgIDs, msg.ID())
}
return msgIDs, nil
}
func (db *DB) UidFromKey(key string) uint32 {
return db.uidStore.GetOrInsert(key)
}
func (db *DB) KeyFromUid(uid uint32) (string, bool) {
return db.uidStore.GetKey(uid)
}
func (db *DB) enumerateThread(nt *notmuch.Threads,
valid map[string]struct{},
) ([]*types.Thread, error) {
var res []*types.Thread
var thread *notmuch.Thread
for nt.Next(&thread) {
root := db.makeThread(nil, thread.TopLevelMessages(), valid)
res = append(res, root)
}
return res, nil
}
func (db *DB) makeThread(parent *types.Thread, msgs *notmuch.Messages,
valid map[string]struct{},
) *types.Thread {
var lastSibling *types.Thread
var msg *notmuch.Message
for msgs.Next(&msg) {
msgID := msg.ID()
_, inQuery := valid[msgID]
var noReplies bool
replies, err := msg.Replies()
// Replies() returns an error if there are no replies
if err != nil {
noReplies = true
}
if !inQuery {
if noReplies {
continue
}
defer replies.Close()
parent = db.makeThread(parent, replies, valid)
continue
}
node := &types.Thread{
Uid: db.uidStore.GetOrInsert(msgID),
Parent: parent,
Hidden: !inQuery,
}
if parent != nil && parent.FirstChild == nil {
parent.FirstChild = node
}
if lastSibling != nil {
if lastSibling.NextSibling != nil {
panic(fmt.Sprintf(
"%v already had a NextSibling, tried setting it",
lastSibling))
}
lastSibling.NextSibling = node
}
lastSibling = node
if noReplies {
continue
}
defer replies.Close()
db.makeThread(node, replies, valid)
}
// We want to return the root node
var root *types.Thread
switch {
case parent != nil:
root = parent
case lastSibling != nil:
root = lastSibling // first iteration has no parent
default:
return nil // we don't have any messages at all
}
for ; root.Parent != nil; root = root.Parent {
// move to the root
}
return root
}
