feat: add email notification for post like

internal/handler/notification.go

@@ -1,6 +1,7 @@
 package handler
 
 import (
+	"encoding/json"
 	"net/http"
 
 	"github.com/prabhupadasays/spsays-bff/internal/middleware"
@@ -49,3 +50,36 @@ func (h *NotificationHandler) MarkAllRead(w http.ResponseWriter, r *http.Request
 	}
 	response.NoContent(w)
 }
+
+type emailPrefsResp struct {
+	LikeEmails bool `json:"like_emails"`
+}
+
+// GetEmailPrefs — GET /notifications/email-prefs. The caller's email-notification
+// preferences (currently just aggregated like emails).
+func (h *NotificationHandler) GetEmailPrefs(w http.ResponseWriter, r *http.Request) {
+	uid := middleware.UserID(r.Context())
+	enabled, err := h.svc.LikeEmailPref(r.Context(), uid)
+	if err != nil {
+		response.Error(w, http.StatusInternalServerError, "could not load email preferences")
+		return
+	}
+	response.JSON(w, http.StatusOK, emailPrefsResp{LikeEmails: enabled})
+}
+
+// UpdateEmailPrefs — PUT /notifications/email-prefs { like_emails }.
+func (h *NotificationHandler) UpdateEmailPrefs(w http.ResponseWriter, r *http.Request) {
+	uid := middleware.UserID(r.Context())
+	var req struct {
+		LikeEmails bool `json:"like_emails"`
+	}
+	if err := json.NewDecoder(r.Body).Decode(&req); err != nil {
+		response.Error(w, http.StatusBadRequest, "invalid JSON body")
+		return
+	}
+	if err := h.svc.SetLikeEmailPref(r.Context(), uid, req.LikeEmails); err != nil {
+		response.Error(w, http.StatusInternalServerError, "could not update email preferences")
+		return
+	}
+	response.JSON(w, http.StatusOK, emailPrefsResp{LikeEmails: req.LikeEmails})
+}