M1/#293: add /api/admin/scan route gated on X-API-Token

internal/server/server.go

@@ -1,20 +1,33 @@
 package server
 
 import (
+	"context"
 	"encoding/json"
 	"log/slog"
 	"net/http"
 
 	"github.com/go-chi/chi/v5"
 	"github.com/go-chi/chi/v5/middleware"
+	"github.com/jackc/pgx/v5/pgxpool"
+
+	"git.fabledsword.com/bvandeusen/minstrel/internal/auth"
+	"git.fabledsword.com/bvandeusen/minstrel/internal/library"
 )
 
-type Server struct {
-	Logger *slog.Logger
+// ScanTrigger is the subset of the scanner the HTTP handler needs. Kept as an
+// interface so tests can stub it without touching the DB.
+type ScanTrigger interface {
+	Scan(ctx context.Context) (library.Stats, error)
 }
 
-func New(logger *slog.Logger) *Server {
-	return &Server{Logger: logger}
+type Server struct {
+	Logger  *slog.Logger
+	Pool    *pgxpool.Pool
+	Scanner ScanTrigger
+}
+
+func New(logger *slog.Logger, pool *pgxpool.Pool, scanner ScanTrigger) *Server {
+	return &Server{Logger: logger, Pool: pool, Scanner: scanner}
 }
 
 func (s *Server) Router() http.Handler {
@@ -23,6 +36,17 @@ func (s *Server) Router() http.Handler {
 	r.Use(middleware.Recoverer)
 
 	r.Get("/healthz", s.handleHealthz)
+
+	if s.Pool != nil {
+		r.Route("/api", func(api chi.Router) {
+			api.Route("/admin", func(admin chi.Router) {
+				admin.Use(auth.RequireAdmin(s.Pool))
+				if s.Scanner != nil {
+					admin.Post("/scan", s.handleAdminScan)
+				}
+			})
+		})
+	}
 	return r
 }
 
@@ -31,3 +55,19 @@ func (s *Server) handleHealthz(w http.ResponseWriter, _ *http.Request) {
 	w.WriteHeader(http.StatusOK)
 	_ = json.NewEncoder(w).Encode(map[string]string{"status": "ok"})
 }
+
+// handleAdminScan runs a scan synchronously and returns the resulting stats.
+// Kept synchronous for v1: libraries are small and the operator can tell when
+// it's done. Async jobs with status polling are a later-milestone concern.
+func (s *Server) handleAdminScan(w http.ResponseWriter, r *http.Request) {
+	stats, err := s.Scanner.Scan(r.Context())
+	w.Header().Set("Content-Type", "application/json")
+	if err != nil {
+		s.Logger.Error("admin scan failed", "err", err)
+		w.WriteHeader(http.StatusInternalServerError)
+		_ = json.NewEncoder(w).Encode(map[string]any{"error": err.Error(), "stats": stats})
+		return
+	}
+	w.WriteHeader(http.StatusOK)
+	_ = json.NewEncoder(w).Encode(stats)
+}