refactor: migrate LDAP sync to an actor (#1651)

Co-authored-by: Kyle Mendell <kmendell@ofkm.us>

backend/internal/ldapsync/handler.go

@@ -0,0 +1,41 @@
+package ldapsync
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/gin-gonic/gin"
+
+	"github.com/pocket-id/pocket-id/backend/internal/appconfig"
+)
+
+type handler struct {
+	service   *Service
+	appConfig appconfig.AppConfigResolver
+}
+
+func newHandler(service *Service, appConfig appconfig.AppConfigResolver) *handler {
+	return &handler{service: service, appConfig: appConfig}
+}
+
+// syncLdap godoc
+// @Summary Synchronize LDAP
+// @Description Manually trigger LDAP synchronization
+// @Tags Application Configuration
+// @Success 204 "No Content"
+// @Router /api/application-configuration/sync-ldap [post]
+func (h *handler) syncLdap(c *gin.Context) error {
+	dbConfig, err := h.appConfig.GetConfig(c.Request.Context())
+	if err != nil {
+		return fmt.Errorf("error loading app configuration: %w", err)
+	}
+
+	// The sync runs inline rather than through the actor, so the response reports whether it succeeded
+	err = h.service.SyncAll(c.Request.Context(), dbConfig)
+	if err != nil {
+		return err
+	}
+
+	c.Status(http.StatusNoContent)
+	return nil
+}