chore: import clean Agent Desk snapshot (2/7)

internal/handlers/third/slack_handler.go

@@ -0,0 +1,43 @@
+package third
+
+import (
+	"bytes"
+	"io"
+	"net/http"
+	"strings"
+
+	"agent-desk/internal/services"
+
+	"github.com/gin-gonic/gin"
+)
+
+// SlackPostWebhook receives incoming Events API payloads from Slack.
+func SlackPostWebhook(ctx *gin.Context) {
+	channelID := strings.TrimSpace(ctx.Param("channel_id"))
+	if channelID == "" {
+		channelID = strings.TrimSpace(ctx.Query("channel_id"))
+	}
+
+	timestampHeader := ctx.GetHeader("X-Slack-Request-Timestamp")
+	signatureHeader := ctx.GetHeader("X-Slack-Signature")
+
+	bodyBytes, err := io.ReadAll(ctx.Request.Body)
+	if err != nil {
+		ctx.JSON(http.StatusBadRequest, gin.H{"ok": false, "error": "failed to read body"})
+		return
+	}
+	ctx.Request.Body = io.NopCloser(bytes.NewBuffer(bodyBytes))
+
+	challenge, err := services.SlackInboundService.HandleWebhook(ctx.Request.Context(), channelID, timestampHeader, signatureHeader, bodyBytes)
+	if err != nil {
+		ctx.JSON(http.StatusOK, gin.H{"ok": false, "error": err.Error()})
+		return
+	}
+
+	if challenge != nil {
+		ctx.JSON(http.StatusOK, gin.H{"challenge": *challenge})
+		return
+	}
+
+	ctx.JSON(http.StatusOK, gin.H{"ok": true})
+}