58 lines
1.3 KiB
Go
58 lines
1.3 KiB
Go
package handler
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import (
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"crypto/subtle"
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"log"
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"net/http"
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"homework-manager/internal/service"
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"github.com/gin-gonic/gin"
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)
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// TelegramHandler handles incoming Telegram webhook requests.
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type TelegramHandler struct {
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telegramService *service.TelegramService
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webhookSecret string
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}
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// NewTelegramHandler creates a TelegramHandler.
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func NewTelegramHandler(telegramService *service.TelegramService, webhookSecret string) *TelegramHandler {
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return &TelegramHandler{
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telegramService: telegramService,
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webhookSecret: webhookSecret,
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}
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}
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// Webhook is the endpoint registered as the Telegram bot webhook.
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// POST /api/telegram/webhook
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func (h *TelegramHandler) Webhook(c *gin.Context) {
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if h.webhookSecret == "" {
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c.Status(http.StatusServiceUnavailable)
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return
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}
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secret := c.GetHeader("X-Telegram-Bot-Api-Secret-Token")
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if subtle.ConstantTimeCompare([]byte(secret), []byte(h.webhookSecret)) != 1 {
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c.Status(http.StatusUnauthorized)
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return
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}
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var update service.TelegramUpdate
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if err := c.ShouldBindJSON(&update); err != nil {
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c.Status(http.StatusBadRequest)
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return
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}
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// Process asynchronously so Telegram gets a 200 within its timeout window.
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go func() {
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defer func() {
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if r := recover(); r != nil {
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log.Printf("telegram HandleUpdate panic: %v", r)
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}
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}()
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h.telegramService.HandleUpdate(update)
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}()
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c.Status(http.StatusOK)
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}
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