import (
"context"
+ "database/sql"
"errors"
"fmt"
- "log"
+ "log/slog"
"net/url"
"os"
"path/filepath"
// the account, so a file that another user can read is an error. The clock
// gives the times of the status, logger gets the failures, and newClient makes
// the client of a device with its event handler.
-func openWhatsApp(ctx context.Context, dir string, clock func() time.Time, logger *log.Logger, newClient func(device *store.Device, handle func(event any) bool) WhatsAppClient) (*WhatsApp, error) {
+func openWhatsApp(ctx context.Context, dir string, clock func() time.Time, logger *slog.Logger, newClient func(device *store.Device, handle func(event any) bool) WhatsAppClient) (*WhatsApp, error) {
w := &WhatsApp{
dir: filepath.Join(dir, whatsappDirName),
clock: clock,
// of the client that asked. A logout from the phone comes as an event of the
// library, and Run deletes the session. The mutex protects the session, the
// client, and the state of the connection, which the event handler of the
-// library changes from its own goroutines.
+// library changes from its own goroutines. The sessionMutex serializes session
+// creation, close, removal, and snapshots. It is held before mutex, and stays
+// held when removal releases mutex for client callbacks.
//
// The inbox puts the text messages into batches and logs them, and groups
// holds the names of the groups. Both get a WhatsAppLink from link for each
type WhatsApp struct {
dir string
clock func() time.Time
- logger *log.Logger
+ logger *slog.Logger
newClient func(device *store.Device, handle func(event any) bool) WhatsAppClient
noticeDelay time.Duration
requests chan WhatsAppRequest
state *WhatsAppState
groups *WhatsAppGroups
inbox *WhatsAppInbox
+ routes *Routes
+ sessionMutex sync.Mutex
mutex sync.Mutex
container *sqlstore.Container
device *store.Device
}
// Status returns the state of the link: not linked, linked and connected, or
-// linked and disconnected, with the times of the connection. It never holds the
-// phone number.
+// linked and disconnected, with the times of the connection and the routes.
+// Route source IDs can hold the phone numbers of other chats.
func (w *WhatsApp) Status() string {
w.mutex.Lock()
defer w.mutex.Unlock()
+ routes := ""
+ if w.routes != nil {
+ listed := w.routes.List()
+ if listed != "No routes." {
+ routes = "\nWhatsApp routes:\n" + listed
+ }
+ }
+
switch {
case !w.linked:
- return "WhatsApp is not linked. Run /whatsapp pair PHONE to link it."
+ return "WhatsApp is not linked. Run /whatsapp pair PHONE to link it." + routes
case w.connected:
- return "WhatsApp is linked and connected since " + w.connectedAt.Format(whatsappTimeLayout) + "."
+ return "WhatsApp is linked and connected since " + w.connectedAt.Format(whatsappTimeLayout) + "." + routes
case w.disconnectedAt.IsZero():
- return "WhatsApp is linked and not connected yet."
+ return "WhatsApp is linked and not connected yet." + routes
case w.connectedAt.IsZero():
- return "WhatsApp is linked and disconnected since " + w.disconnectedAt.Format(whatsappTimeLayout) + "."
+ return "WhatsApp is linked and disconnected since " + w.disconnectedAt.Format(whatsappTimeLayout) + "." + routes
default:
- return "WhatsApp is linked and disconnected since " + w.disconnectedAt.Format(whatsappTimeLayout) + ". The last connection started at " + w.connectedAt.Format(whatsappTimeLayout) + "."
+ return "WhatsApp is linked and disconnected since " + w.disconnectedAt.Format(whatsappTimeLayout) + ". The last connection started at " + w.connectedAt.Format(whatsappTimeLayout) + "." + routes
}
}
+// BackupSession writes a consistent SQLite snapshot to path while the session
+// cannot be created, closed, or removed. The source opens without creation
+// permission. No session file means no linked state to copy.
+func (w *WhatsApp) BackupSession(ctx context.Context, path string) (err error) {
+ w.sessionMutex.Lock()
+ defer w.sessionMutex.Unlock()
+
+ w.mutex.Lock()
+ defer w.mutex.Unlock()
+
+ _, err = os.Stat(w.sessionPath())
+ if errors.Is(err, os.ErrNotExist) {
+ return nil
+ }
+
+ if err != nil {
+ return fmt.Errorf("read session file: %w", err)
+ }
+
+ err = os.MkdirAll(filepath.Dir(path), 0o700)
+ if err != nil {
+ return fmt.Errorf("create session snapshot directory: %w", err)
+ }
+
+ address, err := whatsappSessionAddress(w.sessionPath())
+ if err != nil {
+ return fmt.Errorf("find session database: %w", err)
+ }
+
+ database, err := sql.Open("sqlite", address+"&mode=rw")
+ if err != nil {
+ return fmt.Errorf("open session snapshot source: %w", err)
+ }
+
+ defer func() {
+ err = errors.Join(err, database.Close())
+ }()
+
+ _, err = database.ExecContext(ctx, "VACUUM INTO ?", path)
+ if err != nil {
+ return fmt.Errorf("snapshot session database: %w", err)
+ }
+
+ err = os.Chmod(path, 0o600)
+ if err != nil {
+ return fmt.Errorf("set session snapshot mode: %w", err)
+ }
+
+ return nil
+}
+
// Close closes the session database.
func (w *WhatsApp) Close() error {
+ w.sessionMutex.Lock()
+ defer w.sessionMutex.Unlock()
+
w.mutex.Lock()
defer w.mutex.Unlock()
w.mutex.Unlock()
if first {
- w.logger.Printf("first connect failed, retrying: %s", cause)
+ w.logger.Warn("first connect failed, retrying", "err", cause)
}
return true
return nil
}
- w.logger.Print("logged out by the phone, run /whatsapp pair PHONE")
+ w.logger.Error("logged out by the phone, run /whatsapp pair PHONE")
err := w.inbox.deliver(ctx, l, w.link(), true)
if err != nil {
err = w.removeSession()
if err != nil {
- w.logger.Printf("session delete failed: %v", err)
+ w.logger.Error("session delete failed", "err", err)
}
err = l.note("WhatsApp was unlinked from the phone.")
if err != nil {
- w.logger.Printf("chat note failed: %v", err)
+ w.logger.Error("chat note failed", "err", err)
}
w.broadcast("WhatsApp was unlinked from the phone. Run /whatsapp pair PHONE to link it again.")
return nil
}
- w.logger.Print("unlinked")
+ w.logger.Info("unlinked")
err = l.note("WhatsApp is unlinked.")
if err != nil {
- w.logger.Printf("chat note failed: %v", err)
+ w.logger.Error("chat note failed", "err", err)
}
if client == nil || logoutErr != nil {
}
// removeSession ends the connection, closes the session database, and deletes
-// its files.
+// its files. The session lock covers the cleanup after mutex is released, so a
+// snapshot or a new session cannot open files that cleanup removes.
func (w *WhatsApp) removeSession() error {
+ w.sessionMutex.Lock()
+ defer w.sessionMutex.Unlock()
+
w.mutex.Lock()
client := w.client
linked = true
w.linkedBy(client)
- w.logger.Print("linked")
+ w.logger.Info("linked")
err = l.note("WhatsApp is linked.")
if err != nil {
- w.logger.Printf("chat note failed: %v", err)
+ w.logger.Error("chat note failed", "err", err)
}
answer("WhatsApp is linked to +" + phone + ".")
// directory and the file of the session first, with their modes, when they do
// not exist.
func (w *WhatsApp) newDevice(ctx context.Context) (*store.Device, error) {
+ w.sessionMutex.Lock()
+ defer w.sessionMutex.Unlock()
+
w.mutex.Lock()
defer w.mutex.Unlock()
var notice, line string
+ level := slog.LevelInfo
+
+ var attrs []any
+
w.mutex.Lock()
switch event := event.(type) {
case w.disconnectedAt.IsZero():
line = "connected"
default:
- line = "connected again after " + durationText(w.clock().Sub(w.disconnectedAt))
+ line = "connected again"
+ attrs = append(attrs, "after", w.clock().Sub(w.disconnectedAt))
}
w.connected = true
case *events.Disconnected:
connected := w.connected
if w.startOutage() {
+ level = slog.LevelWarn
line = "disconnected, retrying"
if !connected {
line = "first connect failed, retrying"
w.connected = false
w.noticed = true
notice = "WhatsApp is disconnected and does not connect again by itself: " + event.PermanentDisconnectDescription() + ". Restart the daemon to try again."
- line = "disconnected for good, restart to retry: " + whatsappRedact(w.own, event.PermanentDisconnectDescription())
+ level = slog.LevelError
+ line = "disconnected for good, restart to retry"
+ attrs = append(attrs, "err", whatsappRedact(w.own, event.PermanentDisconnectDescription()))
}
}
w.mutex.Unlock()
if line != "" {
- w.logger.Print(line)
+ w.logger.Log(context.Background(), level, line, attrs...)
}
if notice != "" {
projects / onechat / blobdiff