}
var config TelegramConfig
+
decoder := json.NewDecoder(bytes.NewReader(data))
decoder.DisallowUnknownFields()
+
err = decoder.Decode(&config)
if err == nil && !errors.Is(decoder.Decode(&struct{}{}), io.EOF) {
err = errors.New("data after the JSON object")
// makes Telegram send the update again, and the message repeats once.
//
// A failed Bot API call waits and tries again, from minWait up to maxWait, or
-// as long as the Bot API asks. It never stops the agent.
+// as long as the Bot API asks. It never stops the agent. A TelegramOutage logs
+// the first failure and the end of each run of failures, and the retries
+// between them log nothing.
type TelegramBot struct {
api *TelegramAPI
owner int64
}
b.mutex.Lock()
+
b.queue = append(b.queue, event)
b.mutex.Unlock()
defer cancel()
var sender sync.WaitGroup
+
sender.Add(1)
+
go func() {
defer sender.Done()
}()
err := b.poll(ctx, l, whatsapp)
+
cancel()
sender.Wait()
switch event.Kind {
case "busy":
busy = true
+
b.typing(ctx)
ticker.Reset(telegramTypingInterval)
case "idle":
return err
}
+ outage := &TelegramOutage{
+ logger: b.logger,
+ loss: "receive failed",
+ back: "receive back",
+ }
+
wait := b.minWait
for ctx.Err() == nil {
updates, err := b.api.GetUpdates(ctx, offset)
if err != nil {
_, asked := telegramRetryable(err)
- wait = b.pause(ctx, err, wait, asked)
+ wait = b.pause(ctx, outage, err, wait, asked)
continue
}
+ outage.End()
+
wait = b.minWait
for _, update := range updates {
if ctx.Err() != nil {
}
}
-// pause logs err and waits the longer of wait and asked, or until ctx ends. It
-// returns the wait of the next failure: twice wait, up to maxWait.
-func (b *TelegramBot) pause(ctx context.Context, err error, wait, asked time.Duration) time.Duration {
+// pause gives err to outage and waits the longer of wait and asked, or until
+// ctx ends. It returns the wait of the next failure: twice wait, up to maxWait.
+func (b *TelegramBot) pause(ctx context.Context, outage *TelegramOutage, err error, wait, asked time.Duration) time.Duration {
delay := max(wait, asked)
- b.logger.Printf("%v (next try in %s)", err, delay)
+ outage.Fail(err, delay)
timer := time.NewTimer(delay)
defer timer.Stop()
func (b *TelegramBot) handle(ctx context.Context, l *TurnLoop, whatsapp *WhatsApp, update TelegramUpdate) error {
message := update.Message
if message == nil || message.Chat.Type != "private" || message.Chat.ID != b.owner || message.From == nil || message.From.ID != b.owner {
- b.logger.Print("update ignored: not a message of the owner in the private chat")
+ b.logger.Print("message ignored: not from the owner")
+
return nil
}
// reply is not lost to a bad entity. It tries again after each failure that a
// later try can fix, until ctx ends. It drops the part after any other failure.
func (b *TelegramBot) deliver(ctx context.Context, part TelegramPart) {
+ outage := b.sendOutage()
wait := b.minWait
for {
err := b.api.SendMessage(ctx, b.owner, part.text, part.entities)
+ retry, asked := telegramRetryable(err)
+ if !retry {
+ outage.End()
+ }
+
if err == nil || ctx.Err() != nil {
return
}
var answer *TelegramError
+
if len(part.entities) > 0 && errors.As(err, &answer) && answer.Status == http.StatusBadRequest {
- b.logger.Printf("entities refused, the message goes again as plain text: %v", err)
+ b.logger.Printf("reply sent as plain text: %v", err)
+
part.entities = nil
continue
}
- retry, asked := telegramRetryable(err)
if !retry {
- b.logger.Printf("message dropped: %v", err)
+ b.logger.Printf("reply lost: %v", err)
+
return
}
- wait = b.pause(ctx, err, wait, asked)
+ wait = b.pause(ctx, outage, err, wait, asked)
}
}
// the model wrote it. It tries again after each failure that a later try can
// fix, until ctx ends. It drops the message after any other failure.
func (b *TelegramBot) deliverRich(ctx context.Context, markdown string) {
+ outage := b.sendOutage()
wait := b.minWait
for {
err := b.api.SendRichMessage(ctx, b.owner, markdown)
+ retry, asked := telegramRetryable(err)
+ if !retry {
+ outage.End()
+ }
+
if err == nil || ctx.Err() != nil {
return
}
if telegramRejected(err) {
- b.logger.Printf("rich message refused, the reply goes with entities: %v", err)
+ b.logger.Printf("reply sent with simple formatting: %v", err)
+
for _, part := range telegramReplyParts(telegramUnescapeTags(markdown)) {
b.deliver(ctx, part)
}
return
}
- retry, asked := telegramRetryable(err)
if !retry {
- b.logger.Printf("message dropped: %v", err)
+ b.logger.Printf("reply lost: %v", err)
+
return
}
- wait = b.pause(ctx, err, wait, asked)
+ wait = b.pause(ctx, outage, err, wait, asked)
+ }
+}
+
+// sendOutage returns a new outage of the messages to the chat.
+func (b *TelegramBot) sendOutage() *TelegramOutage {
+ return &TelegramOutage{
+ logger: b.logger,
+ loss: "send failed",
+ back: "send back",
}
}
})
}
+// TelegramOutage is one run of failures of a kind of Bot API call. The first
+// failure logs loss, its cause, and the wait of the next try. The retries log
+// nothing. The next answer of Telegram logs back and the length of the outage.
+// loss and back say what the user loses and gets again.
+type TelegramOutage struct {
+ logger *log.Logger
+ loss string
+ back string
+ start time.Time
+}
+
+// Fail logs the start of an outage with err and delay, unless an outage runs.
+func (o *TelegramOutage) Fail(err error, delay time.Duration) {
+ if !o.start.IsZero() {
+ return
+ }
+
+ o.start = time.Now()
+ o.logger.Printf("%s: %v (retry in %s)", o.loss, err, durationText(delay))
+}
+
+// End logs the end of the outage that runs, with its length.
+func (o *TelegramOutage) End() {
+ if o.start.IsZero() {
+ return
+ }
+
+ o.logger.Printf("%s after %s", o.back, durationText(time.Since(o.start)))
+
+ o.start = time.Time{}
+}
+
// TelegramPart is the text of one message to the chat, at most
// telegramMessageUnits long, and its entities.
type TelegramPart struct {
}
var file TelegramOffsetFile
+
err = json.Unmarshal(data, &file)
if err != nil {
return 0, fmt.Errorf("%s: %w", path, err)
// never cuts a character.
func telegramSplitMessage(text string, limit int) []string {
var parts []string
+
for {
end := telegramPrefixEnd(text, limit)
if end == len(text) {
// not cut an entity of telegramEscapeTags. It never cuts a character.
func telegramSplitRich(markdown string, limit int) []string {
var parts []string
+
for len(markdown) > limit {
cut, fence, opening := telegramRichCut(markdown, limit)
if fence == "" {
// so each cut makes the rest shorter.
func telegramRichCut(markdown string, limit int) (int, string, string) {
blank, line, code := 0, 0, 0
+
var fence, opening, inFence, inOpening string
+
for start := 0; start < limit; {
end := strings.IndexByte(markdown[start:], '\n')
if end < 0 || start+end+1 > limit {
// An entity that crosses a cut becomes one entity in each part.
func telegramSplitEntities(text string, entities []TelegramEntity, limit int) []TelegramPart {
var parts []TelegramPart
+
start := 0
for _, part := range telegramSplitMessage(text, limit) {
end := start + telegramUTF16Units(part)
+
var kept []TelegramEntity
+
for _, entity := range entities {
from := max(entity.Offset, start)
to := min(entity.Offset+entity.Length, end)
projects / onechat / blobdiff