"net/url"
"os"
"path/filepath"
+ "slices"
"strings"
"sync"
"time"
"go.mau.fi/whatsmeow"
+ "go.mau.fi/whatsmeow/proto/waCompanionReg"
+ "go.mau.fi/whatsmeow/proto/waE2E"
"go.mau.fi/whatsmeow/store"
"go.mau.fi/whatsmeow/store/sqlstore"
+ "go.mau.fi/whatsmeow/types"
"go.mau.fi/whatsmeow/types/events"
waLog "go.mau.fi/whatsmeow/util/log"
-
// The session store of the library opens SQLite with this pure Go
// driver.
_ "modernc.org/sqlite"
// as "/whatsapp status".
whatsappCommand = "/whatsapp"
- // whatsappUsage is the answer to a WhatsApp command that does not exist.
+ // whatsappUsage is the answer to a WhatsApp command that does not
+ // exist.
whatsappUsage = "Use /whatsapp pair PHONE, /whatsapp status, or /whatsapp unlink. PHONE is the number of your WhatsApp account with its country code, such as +15550001111."
// whatsappPairSteps tells the user what to do with the pairing code,
// gets a notice.
whatsappNoticeDelay = 10 * time.Minute
+ // whatsappRetryDelay is the first wait after a failed starting
+ // connection.
+ whatsappRetryDelay = 2 * time.Second
+
+ // whatsappRetryLimit is the longest wait between starting connections.
+ whatsappRetryLimit = 5 * time.Minute
+
// whatsappRequests is the number of pair and unlink commands that can
// wait for Run.
whatsappRequests = 8
+
+ // whatsappLookupTime is the longest time of a read of the names in the
+ // session database or of the groups from WhatsApp.
+ whatsappLookupTime = 10 * time.Second
+
+ // whatsappNotLinked is the answer of a WhatsApp tool without a link.
+ whatsappNotLinked = "WhatsApp is not linked. Tell the user to run /whatsapp pair PHONE in the terminal or in Telegram."
)
// WhatsAppClient is the part of the WhatsApp client that the daemon uses. The
GetQRChannel(ctx context.Context) (<-chan whatsmeow.QRChannelItem, error)
PairPhone(ctx context.Context, phone string, showPushNotification bool, clientType whatsmeow.PairClientType, clientDisplayName string) (string, error)
Logout(ctx context.Context) error
+ GetJoinedGroups(ctx context.Context) ([]*types.GroupInfo, error)
+ GenerateMessageID() types.MessageID
+ SendMessage(ctx context.Context, to types.JID, message *waE2E.Message, extra ...whatsmeow.SendRequestExtra) (whatsmeow.SendResponse, error)
}
// openWhatsApp opens the WhatsApp session in the data directory dir. Without
noticeDelay: whatsappNoticeDelay,
requests: make(chan WhatsAppRequest, whatsappRequests),
logouts: make(chan struct{}, 1),
+ groups: newWhatsAppGroups(logger),
+ }
+
+ var err error
+ w.state, err = openWhatsAppState(filepath.Join(w.dir, whatsappStateFileName), whatsappBatchQuiet, whatsappBatchWindow)
+ if err != nil {
+ return nil, err
}
+ w.inbox = newWhatsAppInbox(w.state, clock, w.groups)
+
info, err := os.Stat(w.sessionPath())
if errors.Is(err, os.ErrNotExist) {
return w, nil
if w.device.ID != nil {
w.linked = true
+ w.inbox.waitForCatchup()
w.own = whatsappOwnIDs(w.device.ID.User, w.device.LID.User)
}
return w, nil
}
-// WhatsApp is the link of the daemon to the WhatsApp account of the user, as
-// a linked device. The session database of the library in dir holds the keys
-// of the device. Run keeps a linked device connected, and the library connects
+// WhatsApp is the link of the daemon to the WhatsApp account of the user, as a
+// linked device. The session database of the library in dir holds the keys of
+// the device. Run keeps a linked device connected, and the library connects
// again by itself after a network failure.
//
// The commands pair and unlink go to Run as requests, and Run runs one at a
// client, and the state of the connection, which the event handler of the
// library changes from its own goroutines.
//
+// 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
+// call, so they use the current device and client.
+//
// The library logs nothing, because its log lines hold the ID of the own
// account, which is the phone number of the user. The own number and the own
// LID never go to the log of the agent or to the log of the daemon: redact
-// removes them from the errors.
+// removes them from the errors, and a batch shows the messages of the user as
+// You and a mention of the user as @you. The IDs of the other chats go to the
+// log, and those of private chats hold phone numbers, because the agent needs
+// them to send.
type WhatsApp struct {
dir string
clock func() time.Time
noticeDelay time.Duration
requests chan WhatsAppRequest
logouts chan struct{}
+ state *WhatsAppState
+ groups *WhatsAppGroups
+ inbox *WhatsAppInbox
mutex sync.Mutex
container *sqlstore.Container
own []string
notify func(Event)
connected bool
+ retrying bool
connectedAt time.Time
disconnectedAt time.Time
disconnections int
closed bool
}
-// Run connects a linked device, runs the pair and unlink commands, and handles
-// a logout from the phone, until ctx ends. Its notes go to the log of l, and
-// notify gets the notices for all clients. A failed first connection is
-// logged, and the library tries again when the failure is one of the network.
-func (w *WhatsApp) Run(ctx context.Context, l *TurnLoop, notify func(Event)) {
+// Run connects a linked device, logs the closed batches in l, runs the pair and
+// unlink commands, and handles a logout from the phone, until ctx ends. Its
+// notes go to the log of l, and notify gets the notices for all clients. A
+// failed first connection starts the same outage notice as a lost connection. A
+// timer in the select retries it with a doubled wait from 2 seconds to 5
+// minutes, without a retry goroutine or a wait that blocks commands or the
+// inbox. A connection, unlink, logout, or ctx end stops retries. The library
+// owns retries after a connection opens. Run returns the error of a write of
+// the log or of the state file, which stops the daemon, because then messages
+// would be lost.
+func (w *WhatsApp) Run(ctx context.Context, l *TurnLoop, notify func(Event)) error {
w.mutex.Lock()
w.notify = notify
linked := w.linked
+ w.retrying = linked
w.mutex.Unlock()
- if linked {
- w.connect(ctx)
+ timer := time.NewTimer(whatsappRetryDelay)
+ timer.Stop()
+ defer timer.Stop()
+
+ var retry <-chan time.Time
+ delay := whatsappRetryDelay
+ connect := func() {
+ retry = nil
+ if w.connect(ctx) {
+ timer.Reset(delay)
+ retry = timer.C
+ delay = min(2*delay, whatsappRetryLimit)
+ }
+ }
+
+ stopRetry := func() {
+ timer.Stop()
+ retry = nil
+ w.mutex.Lock()
+ w.retrying = false
+ w.mutex.Unlock()
}
var pairing sync.WaitGroup
w.close()
}()
+ if linked {
+ connect()
+ }
+
for {
+ err := w.inbox.deliver(ctx, l, w.link(), false)
+ if err != nil {
+ return err
+ }
+
select {
case <-ctx.Done():
- return
+ return nil
+ case err = <-w.inbox.failures:
+ return err
+ case <-w.inbox.wake:
+ case <-w.inbox.due():
+ case <-retry:
+ connect()
case <-w.logouts:
- w.loggedOut(l)
+ stopRetry()
+ err = w.loggedOut(ctx, l)
+ if err != nil {
+ return err
+ }
case request := <-w.requests:
cancel()
pairing.Wait()
switch {
case request.unlink:
- w.unlink(ctx, l, request.answer)
+ stopRetry()
+ err = w.unlink(ctx, l, request.answer)
+ if err != nil {
+ return err
+ }
case w.isLinked():
request.answer("WhatsApp is linked already. Run /whatsapp unlink first.")
default:
pairing.Go(func() {
defer cancelPair()
- w.pair(pairCtx, l, request.phone, request.answer)
+ w.pair(pairCtx, ctx, l, request.phone, request.answer)
})
}
}
}
// 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. It never holds the
+// phone number.
func (w *WhatsApp) Status() string {
w.mutex.Lock()
defer w.mutex.Unlock()
return err
}
+// Find returns the answer of whatsapp_find for name, as whatsappFind says.
+func (w *WhatsApp) Find(ctx context.Context, name string) (string, error) {
+ return whatsappFind(ctx, w.link(), w.groups, name)
+}
+
+// Send returns the answer of whatsapp_send for the send id of text to chat, as
+// whatsappSend says.
+func (w *WhatsApp) Send(ctx context.Context, id, chat, text string) (string, error) {
+ return whatsappSend(ctx, w.link(), w.groups, w.state, w.clock, id, chat, text)
+}
+
func (w *WhatsApp) sessionPath() string {
return filepath.Join(w.dir, whatsappSessionFileName)
}
-// openSession opens the session database and its first device. The caller
-// holds the mutex, or no other goroutine uses w yet.
+// openSession opens the session database and its first device. The caller holds
+// the mutex, or no other goroutine uses w yet.
func (w *WhatsApp) openSession(ctx context.Context) error {
address, err := whatsappSessionAddress(w.sessionPath())
if err != nil {
return w.linked
}
-// connect makes the client of the linked device and connects it.
-func (w *WhatsApp) connect(ctx context.Context) {
+// link returns a copy of the link of the device: whether it is linked, the
+// device, the client, whether it is connected, and the own IDs.
+func (w *WhatsApp) link() WhatsAppLink {
+ w.mutex.Lock()
+ defer w.mutex.Unlock()
+
+ return WhatsAppLink{
+ linked: w.linked,
+ device: w.device,
+ client: w.client,
+ connected: w.connected,
+ own: slices.Clone(w.own),
+ }
+}
+
+// connect tries the starting connection of the linked device with one client.
+// It returns whether Run must retry. A failed call starts the shared outage
+// state and logs its redacted cause once, because a returned ConnectContext
+// error does not emit Disconnected. Connected logs recovery after
+// authentication.
+func (w *WhatsApp) connect(ctx context.Context) bool {
w.mutex.Lock()
- w.client = w.newClient(w.device, w.handle)
+ if ctx.Err() != nil || !w.linked || !w.retrying || w.closed {
+ w.mutex.Unlock()
+ return false
+ }
+
+ if w.client == nil {
+ w.client = w.newClient(w.device, w.handle)
+ }
+
client := w.client
w.mutex.Unlock()
err := client.ConnectContext(ctx)
- if err != nil {
- w.logger.Printf("connect: %s", w.redact(err.Error()))
+ w.mutex.Lock()
+ if err == nil || ctx.Err() != nil || !w.retrying || !w.linked {
+ w.retrying = false
+ w.mutex.Unlock()
+ return false
+ }
+
+ first := w.startOutage()
+ cause := whatsappRedact(w.own, err.Error())
+ w.mutex.Unlock()
+ if first {
+ w.logger.Printf("first connect failed, retrying: %s", cause)
}
+
+ return true
}
-// close ends the connection and the timer of the notice, and stops all
-// notices.
+// startOutage starts the shared outage time and notice timer once. The caller
+// holds the mutex. Its result tells whether this is the first failure.
+func (w *WhatsApp) startOutage() bool {
+ first := w.linked && (w.connected || w.disconnectedAt.IsZero())
+ if first {
+ w.disconnectedAt = w.clock()
+ w.disconnections++
+ disconnections := w.disconnections
+ w.timer = time.AfterFunc(w.noticeDelay, func() {
+ w.disconnectedLong(disconnections)
+ })
+ }
+
+ w.connected = false
+
+ return first
+}
+
+// close ends the connection and the timer of the notice, and stops all notices.
func (w *WhatsApp) close() {
w.mutex.Lock()
w.closed = true
w.client = nil
w.mutex.Unlock()
+ w.inbox.close()
+
if client != nil {
client.Disconnect()
}
}
-// loggedOut deletes the session after a logout from the phone, notes it in the
-// log of l, and tells all clients one time.
-func (w *WhatsApp) loggedOut(l *TurnLoop) {
+// loggedOut logs the open batches, deletes the session after a logout from the
+// phone, notes it in the log of l, and tells all clients one time.
+func (w *WhatsApp) loggedOut(ctx context.Context, l *TurnLoop) error {
if !w.isLinked() {
- return
+ return nil
}
- err := w.removeSession()
+ w.logger.Print("logged out by the phone, run /whatsapp pair PHONE")
+ err := w.inbox.deliver(ctx, l, w.link(), true)
if err != nil {
- w.logger.Printf("delete the session after the logout: %v", err)
+ return err
+ }
+
+ err = w.removeSession()
+ if err != nil {
+ w.logger.Printf("session delete failed: %v", err)
}
err = l.note("WhatsApp was unlinked from the phone.")
if err != nil {
- w.logger.Printf("note the logout: %v", err)
+ w.logger.Printf("chat note failed: %v", err)
}
w.broadcast("WhatsApp was unlinked from the phone. Run /whatsapp pair PHONE to link it again.")
+
+ return nil
}
-// unlink logs out the linked device and deletes the session. When the logout
-// call fails, as it does while WhatsApp is disconnected, the session is
-// deleted all the same, and answer tells the user to remove the device in the
-// phone.
-func (w *WhatsApp) unlink(ctx context.Context, l *TurnLoop, answer func(text string)) {
+// unlink logs the open batches, logs out the linked device, and deletes the
+// session. When the logout call fails, as it does while WhatsApp is
+// disconnected, the session is deleted all the same, and answer tells the user
+// to remove the device in the phone. Its error is one of the log or the state
+// file.
+func (w *WhatsApp) unlink(ctx context.Context, l *TurnLoop, answer func(text string)) error {
w.mutex.Lock()
linked := w.linked
client := w.client
if !linked {
answer("WhatsApp is not linked.")
- return
+ return nil
+ }
+
+ err := w.inbox.deliver(ctx, l, w.link(), true)
+ if err != nil {
+ return err
}
var logoutErr error
logoutErr = client.Logout(ctx)
}
- err := w.removeSession()
+ err = w.removeSession()
if err != nil {
answer("The unlink failed: " + w.redact(err.Error()))
- return
+ return nil
}
+ w.logger.Print("unlinked")
err = l.note("WhatsApp is unlinked.")
if err != nil {
- w.logger.Printf("note the unlink: %v", err)
+ w.logger.Printf("chat note failed: %v", err)
}
if client == nil || logoutErr != nil {
answer("WhatsApp is unlinked here, but the phone did not get the logout. In WhatsApp on your phone, open Linked devices and remove the device.")
- return
+ return nil
}
answer("WhatsApp is unlinked.")
+
+ return nil
}
// removeSession ends the connection, closes the session database, and deletes
client := w.client
w.client = nil
w.linked = false
+ w.retrying = false
w.own = nil
w.connected = false
+ w.disconnectedAt = time.Time{}
if w.timer != nil {
w.timer.Stop()
}
w.device = nil
w.mutex.Unlock()
+ w.inbox.stopCatchup()
+
if client != nil {
client.Disconnect()
}
return err
}
-// pair links a new device to the account of phone with a pairing code. It
-// gives the steps and the code to answer, and then the end of the pairing:
-// the linked number, an expired code, or a failure. A pairing that a new one
-// ends gives no answer. A link notes "WhatsApp is linked." in the log of l,
-// with no number. The client of a pairing that does not link is disconnected.
-func (w *WhatsApp) pair(ctx context.Context, l *TurnLoop, phone string, answer func(text string)) {
+// pair links a new device to the account of phone with a pairing code. It gives
+// the steps and the code to answer, and then the end of the pairing: the linked
+// number, an expired code, or a failure. A pairing that a new one ends gives no
+// answer. A link notes "WhatsApp is linked." in the log of l, with no number.
+// The client of a pairing that does not link is disconnected.
+//
+// ctx limits the pairing, but the connection uses runCtx, the context of Run.
+// The library keeps the context of the connection for its keep-alive, its event
+// handler, and its reconnections, and after the link the server ends the stream
+// and the library connects again. With ctx, the end of the pairing would stop
+// that reconnection, and the linked device would never connect.
+func (w *WhatsApp) pair(ctx, runCtx context.Context, l *TurnLoop, phone string, answer func(text string)) {
device, err := w.newDevice(ctx)
if err != nil {
answer("The pairing failed: " + err.Error())
qr, err := client.GetQRChannel(ctx)
if err == nil {
- err = client.ConnectContext(ctx)
+ err = client.ConnectContext(runCtx)
}
if err != nil {
return
}
+ // The server accepts only a display name of the form "Browser (OS)"
+ // with a common browser and OS, and refuses the pairing otherwise.
code, err := client.PairPhone(ctx, phone, true, whatsmeow.PairClientChrome, "Chrome (Linux)")
if err != nil {
answer("WhatsApp refused the pairing: " + err.Error() + ". Check the phone number and run /whatsapp pair PHONE again.")
case item.Event == whatsmeow.QRChannelSuccess.Event:
linked = true
w.linkedBy(client)
+ w.logger.Print("linked")
err = l.note("WhatsApp is linked.")
if err != nil {
- w.logger.Printf("note the link: %v", err)
+ w.logger.Printf("chat note failed: %v", err)
}
answer("WhatsApp is linked to +" + phone + ".")
w.linked = true
}
-// handle takes one event of the library and tells if it was handled. A
-// disconnection keeps the time of its start while the library tries again.
-// After noticeDelay of a disconnection, all clients get one notice, and they
-// get one more when the connection comes back. A disconnection that the
-// library does not try again gives a notice at once.
+// handle takes one event of the library and tells if it was handled. A message
+// goes to the inbox. The names of the groups follow the events of the groups. A
+// connection starts a catch-up of the inbox, which ends at OfflineSyncCompleted
+// or after its catchupLimit. A disconnection keeps the time of its start while
+// Run or the library tries again. After noticeDelay of a disconnection, all
+// clients get one notice, and they get one more when the connection comes back.
+// A disconnection that the library does not try again gives a notice at once.
+//
+// The log of the daemon gets one line for each change of the connection of the
+// linked device: connected, a failed first connection, a lost connection, and
+// connected again with the length of the outage. The retries of the library and
+// Run between them log nothing.
func (w *WhatsApp) handle(event any) bool {
- var notice string
+ switch event := event.(type) {
+ case *events.Message:
+ return w.inbox.receive(w.link(), event)
+ case *events.GroupInfo:
+ if event.Name != nil {
+ w.groups.set(event.JID.String(), event.Name.Name)
+ }
+
+ return true
+ case *events.JoinedGroup:
+ w.groups.set(event.JID.String(), event.Name)
+ return true
+ case *events.OfflineSyncCompleted:
+ w.inbox.endCatchup()
+ return true
+ case *events.Connected:
+ w.inbox.startCatchup()
+ }
+
+ var notice, line string
w.mutex.Lock()
switch event := event.(type) {
case *events.PairSuccess:
w.own = whatsappOwnIDs(event.ID.User, event.LID.User)
case *events.Connected:
+ switch {
+ case !w.linked || w.connected:
+ case w.disconnectedAt.IsZero():
+ line = "connected"
+ default:
+ line = "connected again after " + durationText(w.clock().Sub(w.disconnectedAt))
+ }
+
w.connected = true
+ w.retrying = false
w.connectedAt = w.clock()
if w.timer != nil {
w.timer.Stop()
notice = "WhatsApp is connected again."
}
case *events.Disconnected:
- if w.linked && (w.connected || w.disconnectedAt.IsZero()) {
- w.disconnectedAt = w.clock()
- w.disconnections++
- disconnections := w.disconnections
- w.timer = time.AfterFunc(w.noticeDelay, func() {
- w.disconnectedLong(disconnections)
- })
+ connected := w.connected
+ if w.startOutage() {
+ line = "disconnected, retrying"
+ if !connected {
+ line = "first connect failed, retrying"
+ }
}
-
- w.connected = false
case *events.LoggedOut:
+ w.retrying = false
select {
case w.logouts <- struct{}{}:
default:
}
case events.PermanentDisconnect:
+ w.retrying = false
if w.linked {
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())
}
}
+
+ if w.closed {
+ line = ""
+ }
+
w.mutex.Unlock()
+ if line != "" {
+ w.logger.Print(line)
+ }
+
if notice != "" {
w.broadcast(notice)
}
w.mutex.Lock()
defer w.mutex.Unlock()
- for _, id := range w.own {
- text = strings.ReplaceAll(text, id, "OWN")
- }
+ return whatsappRedact(w.own, text)
+}
- return text
+// WhatsAppLink is a copy of the link of the device at one time, for the parts
+// of WhatsApp that do not own it: the groups, the batches, find, and send.
+type WhatsAppLink struct {
+ linked bool
+ device *store.Device
+ client WhatsAppClient
+ connected bool
+ own []string
}
// WhatsAppRequest is a pair or unlink command for Run, with the function that
answer func(text string)
}
+// whatsappSetDeviceProps sets the device properties that the library sends at
+// the pairing. They are global values of the library, so the daemon sets them
+// once before any client exists. The phone shows the linked device with the
+// name OneChat and a desktop icon only when the platform type is known.
+func whatsappSetDeviceProps() {
+ store.SetOSInfo("OneChat", [3]uint32{0, 1, 0})
+ store.DeviceProps.PlatformType = waCompanionReg.DeviceProps_DESKTOP.Enum()
+}
+
// whatsappNewClient returns the client of the library for device, with handle
-// as its event handler. The client tries again after a failed first
-// connection, acknowledges a message only after handle returns true, and
-// downloads no old history. The phone shows the device with the name OneChat.
+// as its event handler. Run owns failed starting connections of linked devices,
+// so only an unlinked device enables the initial retry of the library for
+// pairing. The library still retries a lost connection. The client acknowledges
+// a message only after handle returns true, and downloads no old history.
func whatsappNewClient(device *store.Device, handle func(event any) bool) WhatsAppClient {
- store.SetOSInfo("OneChat", [3]uint32{0, 1, 0})
client := whatsmeow.NewClient(device, waLog.Noop)
- client.InitialAutoReconnect = true
+ client.InitialAutoReconnect = device.ID == nil
client.SynchronousAck = true
client.ManualHistorySyncDownload = true
client.AddEventHandlerWithSuccessStatus(handle)
return client
}
+// whatsappContactName returns the name of the person jid: the full name, the
+// first name, the business name, or the push name of the contact in the session
+// of device, then push, the push name of a message, then the phone number. A
+// LID gets its phone number from the LID map of the session.
+func whatsappContactName(ctx context.Context, device *store.Device, jid types.JID, push string) string {
+ jid = jid.ToNonAD()
+ candidates := []types.JID{jid}
+ phone := types.EmptyJID
+ switch jid.Server {
+ case types.DefaultUserServer:
+ phone = jid
+ case types.HiddenUserServer:
+ mapped, err := device.LIDs.GetPNForLID(ctx, jid)
+ if err == nil && !mapped.IsEmpty() {
+ phone = mapped
+ candidates = append(candidates, mapped)
+ }
+ }
+
+ for _, candidate := range candidates {
+ contact, err := device.Contacts.GetContact(ctx, candidate)
+ if err != nil || !contact.Found {
+ continue
+ }
+
+ for _, name := range []string{contact.FullName, contact.FirstName, contact.BusinessName, contact.PushName} {
+ if name != "" {
+ return name
+ }
+ }
+ }
+
+ switch {
+ case push != "":
+ return push
+ case !phone.IsEmpty():
+ return "+" + phone.User
+ default:
+ return jid.User
+ }
+}
+
// whatsappOwnIDs returns the own number and the own LID that are not empty.
func whatsappOwnIDs(ids ...string) []string {
var own []string
return own
}
+// whatsappRedact replaces each of the own IDs own in text with OWN.
+func whatsappRedact(own []string, text string) string {
+ for _, id := range own {
+ text = strings.ReplaceAll(text, id, "OWN")
+ }
+
+ return text
+}
+
// whatsappSessionAddress returns the SQLite address of the session database at
// path, with foreign keys on, as the library needs, and a wait for a busy
// database.
return strings.TrimSpace(args), true
}
-// whatsappPhone returns the digits of phone, a number with its country code
-// and an optional + and dashes, and tells if it has the form of a number: 7 to
-// 15 digits, with no 0 first.
+// whatsappPhone returns the digits of phone, a number with its country code and
+// an optional + and dashes, and tells if it has the form of a number: 7 to 15
+// digits, with no 0 first.
func whatsappPhone(phone string) (string, bool) {
phone = strings.ReplaceAll(strings.TrimPrefix(phone, "+"), "-", "")
valid := len(phone) >= 7 && len(phone) <= 15 && phone[0] != '0' && strings.Trim(phone, "0123456789") == ""
projects / onechat / blobdiff