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package telegram
import (
"github.com/pkg/errors"
"math"
"strconv"
"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.TdlibParameters
PhoneNumber chan string
Code chan string
State chan client.AuthorizationState
Password chan string
}
func (stateHandler *clientAuthorizer) Handle(c *client.Client, state client.AuthorizationState) error {
stateHandler.State <- state
switch state.AuthorizationStateType() {
case client.TypeAuthorizationStateWaitTdlibParameters:
_, err := c.SetTdlibParameters(&client.SetTdlibParametersRequest{
Parameters: <-stateHandler.TdlibParameters,
})
return err
case client.TypeAuthorizationStateWaitEncryptionKey:
_, err := c.CheckDatabaseEncryptionKey(&client.CheckDatabaseEncryptionKeyRequest{})
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:
return client.ErrNotSupportedAuthorizationState
case client.TypeAuthorizationStateWaitPassword:
_, err := c.CheckAuthenticationPassword(&client.CheckAuthenticationPasswordRequest{
Password: <-stateHandler.Password,
})
return err
case client.TypeAuthorizationStateReady:
return nil
case client.TypeAuthorizationStateLoggingOut:
return client.ErrNotSupportedAuthorizationState
case client.TypeAuthorizationStateClosing:
return client.ErrNotSupportedAuthorizationState
case client.TypeAuthorizationStateClosed:
return client.ErrNotSupportedAuthorizationState
}
return client.ErrNotSupportedAuthorizationState
}
func (stateHandler *clientAuthorizer) Close() {
close(stateHandler.TdlibParameters)
close(stateHandler.PhoneNumber)
close(stateHandler.Code)
close(stateHandler.State)
close(stateHandler.Password)
}
// Connect starts TDlib connection
func (c *Client) Connect() error {
// avoid conflict if another authorization is pending already
c.locks.authorizationReady.Wait()
if c.Online() {
return nil
}
log.Warn("Connecting to Telegram network...")
c.authorizer = &clientAuthorizer{
TdlibParameters: make(chan *client.TdlibParameters, 1),
PhoneNumber: make(chan string, 1),
Code: make(chan string, 1),
State: make(chan client.AuthorizationState, 10),
Password: make(chan string, 1),
}
c.locks.authorizationReady.Add(1)
go c.interactor()
c.authorizer.TdlibParameters <- c.parameters
tdlibClient, err := client.NewClient(c.authorizer, c.logVerbosity)
if err != nil {
return errors.Wrap(err, "Couldn't initialize a Telegram client instance")
}
c.client = tdlibClient
c.listener = tdlibClient.GetListener()
c.locks.authorizationReady.Done()
go c.updateHandler()
return nil
}
// Disconnect drops TDlib connection
func (c *Client) Disconnect() {
// already disconnected
if !c.Online() {
return
}
log.Warn("Disconnecting from Telegram network...")
// we're offline (unsubscribe if logout)
for id := range c.cache.chats {
gateway.SendPresence(
c.xmpp,
c.jid,
gateway.SPFrom(strconv.FormatInt(id, 10)),
gateway.SPType("unavailable"),
)
}
_, err := c.client.Close()
if err != nil {
log.Fatalf("Couldn't close the Telegram instance: %#v", c)
}
}
func (c *Client) interactor() {
for {
state, ok := <-c.authorizer.State
if !ok {
log.Error("Interactor is disconnected")
return
}
stateType := state.AuthorizationStateType()
log.Infof("Telegram authorization state: %#v", stateType)
log.Debugf("%#v", state)
switch stateType {
case client.TypeAuthorizationStateWaitPhoneNumber:
log.Warn("Logging in...")
if c.Session.Login != "" {
c.authorizer.PhoneNumber <- c.Session.Login
} else {
gateway.SendMessage(c.jid, "", "Please, enter your Telegram login via /login 12345", c.xmpp)
}
case client.TypeAuthorizationStateWaitCode:
log.Warn("Waiting for authorization code...")
gateway.SendMessage(c.jid, "", "Please, enter authorization code via /code 12345", c.xmpp)
case client.TypeAuthorizationStateWaitPassword:
log.Warn("Waiting for 2FA password...")
gateway.SendMessage(c.jid, "", "Please, enter 2FA passphrase via /password 12345", c.xmpp)
case client.TypeAuthorizationStateReady:
var err error
c.locks.authorizationReady.Wait()
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
}
_, err = c.client.GetChats(&client.GetChatsRequest{
OffsetOrder: client.JsonInt64(math.MaxInt64),
Limit: chatsLimit,
})
if err != nil {
log.Error("Could not retrieve chats")
}
gateway.SendPresence(c.xmpp, c.jid, gateway.SPStatus("Logged in "+c.Session.Login))
case client.TypeAuthorizationStateClosed:
log.Warn("Closing the updates listener")
c.listener.Close()
}
}
}
// Online checks if the updates listener is alive
func (c *Client) Online() bool {
return c.listener != nil && c.listener.IsActive()
}
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