package telegram
import (
"github.com/pkg/errors"
"time"
"dev.narayana.im/narayana/telegabber/xmpp/gateway"
log "github.com/sirupsen/logrus"
"github.com/zelenin/go-tdlib/client"
)
const chatsLimit int32 = 999
type clientAuthorizer struct {
TdlibParameters chan *client.SetTdlibParametersRequest
PhoneNumber chan string
Code chan string
State chan client.AuthorizationState
Password chan string
FirstName chan string
LastName chan string
isClosed bool
}
func (stateHandler *clientAuthorizer) Handle(c *client.Client, state client.AuthorizationState) error {
if stateHandler.isClosed {
return errors.New("Channel is closed")
}
stateHandler.State <- state
switch state.AuthorizationStateType() {
case client.TypeAuthorizationStateWaitTdlibParameters:
_, err := c.SetTdlibParameters(<-stateHandler.TdlibParameters)
return err
case client.TypeAuthorizationStateWaitPhoneNumber:
_, err := c.SetAuthenticationPhoneNumber(&client.SetAuthenticationPhoneNumberRequest{
PhoneNumber: <-stateHandler.PhoneNumber,
Settings: &client.PhoneNumberAuthenticationSettings{
AllowFlashCall: false,
IsCurrentPhoneNumber: false,
AllowSmsRetrieverApi: false,
},
})
return err
case client.TypeAuthorizationStateWaitCode:
_, err := c.CheckAuthenticationCode(&client.CheckAuthenticationCodeRequest{
Code: <-stateHandler.Code,
})
return err
case client.TypeAuthorizationStateWaitRegistration:
_, err := c.RegisterUser(&client.RegisterUserRequest{
FirstName: <-stateHandler.FirstName,
LastName: <-stateHandler.LastName,
})
return err
case client.TypeAuthorizationStateWaitPassword:
_, err := c.CheckAuthenticationPassword(&client.CheckAuthenticationPasswordRequest{
Password: <-stateHandler.Password,
})
return err
case client.TypeAuthorizationStateReady:
return nil
case client.TypeAuthorizationStateLoggingOut:
return nil
case client.TypeAuthorizationStateClosing:
return nil
case client.TypeAuthorizationStateClosed:
return client.ErrNotSupportedAuthorizationState
}
return client.ErrNotSupportedAuthorizationState
}
func (stateHandler *clientAuthorizer) Close() {
if stateHandler.isClosed {
return
}
stateHandler.isClosed = true
close(stateHandler.TdlibParameters)
close(stateHandler.PhoneNumber)
close(stateHandler.Code)
close(stateHandler.State)
close(stateHandler.Password)
close(stateHandler.FirstName)
close(stateHandler.LastName)
}
// Connect starts TDlib connection
func (c *Client) Connect(resource string) error {
log.Warn("Attempting to connect to Telegram network...")
// avoid conflict if another authorization is pending already
c.locks.authorizationReady.Lock()
if c.Online() {
c.roster(resource)
c.locks.authorizationReady.Unlock()
return nil
}
log.Warn("Connecting to Telegram network...")
c.locks.authorizerWriteLock.Lock()
c.authorizer = &clientAuthorizer{
TdlibParameters: make(chan *client.SetTdlibParametersRequest, 1),
PhoneNumber: make(chan string, 1),
Code: make(chan string, 1),
State: make(chan client.AuthorizationState, 10),
Password: make(chan string, 1),
FirstName: make(chan string, 1),
LastName: make(chan string, 1),
}
go c.interactor()
log.Warn("Interactor launched")
c.authorizer.TdlibParameters <- c.parameters
c.locks.authorizerWriteLock.Unlock()
tdlibClient, err := client.NewClient(c.authorizer, c.options...)
if err != nil {
c.locks.authorizationReady.Unlock()
return errors.Wrap(err, "Couldn't initialize a Telegram client instance")
}
c.client = tdlibClient
// stage 3: if a client is succesfully created, AuthorizationStateReady is already reached
log.Warn("Authorization successful!")
c.me, err = c.client.GetMe()
if err != nil {
log.Error("Could not retrieve me info")
} else if c.Session.Login == "" {
c.Session.Login = c.me.PhoneNumber
}
go c.updateHandler()
c.online = true
c.locks.authorizationReady.Unlock()
c.addResource(resource)
go func() {
_, err = c.client.GetChats(&client.GetChatsRequest{
Limit: chatsLimit,
})
if err != nil {
log.Errorf("Could not retrieve chats: %v", err)
}
gateway.SubscribeToTransport(c.xmpp, c.jid)
c.sendPresence(gateway.SPStatus("Logged in as: "+c.Session.Login))
}()
return nil
}
func (c *Client) TryLogin(resource string, login string) error {
wasSessionLoginEmpty := c.Session.Login == ""
c.Session.Login = login
if wasSessionLoginEmpty && c.authorizer == nil {
go func() {
err := c.Connect(resource)
if err != nil {
log.Error(errors.Wrap(err, "TDlib connection failure"))
}
}()
// a quirk for authorizer to become ready. If it's still not,
// nothing bad: just re-login again
time.Sleep(1e5)
}
c.locks.authorizerWriteLock.Lock()
defer c.locks.authorizerWriteLock.Unlock()
if c.authorizer == nil {
return errors.New(TelegramNotInitialized)
}
if c.authorizer.isClosed {
return errors.New(TelegramAuthDone)
}
return nil
}
func (c *Client) SetPhoneNumber(login string) error {
c.locks.authorizerWriteLock.Lock()
defer c.locks.authorizerWriteLock.Unlock()
if c.authorizer == nil || c.authorizer.isClosed {
return errors.New("Authorization not needed")
}
c.authorizer.PhoneNumber <- login
return nil
}
// Disconnect drops TDlib connection and
// returns the flag indicating if disconnecting is permitted
func (c *Client) Disconnect(resource string, quit bool) bool {
if !quit {
c.deleteResource(resource)
}
// other resources are still active
if (len(c.resources) > 0 || c.Session.KeepOnline) && !quit {
log.Infof("Resource %v for account %v has disconnected, %v remaining", resource, c.Session.Login, len(c.resources))
log.Debugf("Resources: %#v", c.resources)
return false
}
// already disconnected
if !c.Online() {
return false
}
log.Warn("Disconnecting from Telegram network...")
// we're offline (unsubscribe if logout)
for _, id := range c.cache.ChatsKeys() {
args := gateway.SimplePresence(id, "unavailable")
c.sendPresence(args...)
}
c.close()
return true
}
func (c *Client) interactor() {
for {
c.locks.authorizerReadLock.Lock()
if c.authorizer == nil {
log.Warn("Authorizer is lost, halting the interactor")
c.locks.authorizerReadLock.Unlock()
return
}
state, ok := <-c.authorizer.State
if !ok {
log.Warn("Interactor is disconnected")
c.locks.authorizerReadLock.Unlock()
return
}
stateType := state.AuthorizationStateType()
log.Infof("Telegram authorization state: %#v", stateType)
log.Debugf("%#v", state)
switch stateType {
// stage 0: set login
case client.TypeAuthorizationStateWaitPhoneNumber:
log.Warn("Logging in...")
if c.Session.Login != "" {
c.authorizer.PhoneNumber <- c.Session.Login
} else {
gateway.SendServiceMessage(c.jid, "Please, enter your Telegram login via /login 12345", c.xmpp)
}
// stage 1: wait for auth code
case client.TypeAuthorizationStateWaitCode:
log.Warn("Waiting for authorization code...")
gateway.SendServiceMessage(c.jid, "Please, enter authorization code via /code 12345", c.xmpp)
// stage 1b: wait for registration
case client.TypeAuthorizationStateWaitRegistration:
log.Warn("Waiting for full name...")
gateway.SendServiceMessage(c.jid, "This number is not registered yet! Please, enter your name via /setname John Doe", c.xmpp)
// stage 2: wait for 2fa
case client.TypeAuthorizationStateWaitPassword:
log.Warn("Waiting for 2FA password...")
gateway.SendServiceMessage(c.jid, "Please, enter 2FA passphrase via /password 12345", c.xmpp)
}
c.locks.authorizerReadLock.Unlock()
}
}
func (c *Client) forceClose() {
c.locks.authorizerReadLock.Lock()
c.locks.authorizerWriteLock.Lock()
defer c.locks.authorizerReadLock.Unlock()
defer c.locks.authorizerWriteLock.Unlock()
c.online = false
c.authorizer = nil
}
func (c *Client) close() {
c.locks.authorizerWriteLock.Lock()
if c.authorizer != nil && !c.authorizer.isClosed {
c.authorizer.Close()
}
c.locks.authorizerWriteLock.Unlock()
if c.client != nil {
_, err := c.client.Close()
if err != nil {
log.Errorf("Couldn't close the Telegram instance: %v; %#v", err, c)
}
}
c.forceClose()
}
func (c *Client) cancelAuth() {
c.close()
c.Session.Login = ""
}
// Online checks if the updates listener is alive
func (c *Client) Online() bool {
return c.online
}
