refactor: extract API handlers into internal packages

Move HTTP handler logic out of main into internal api and server packages, slimming main to a thin entrypoint. Bundles bug fixes: login nil-panic, empty-password validation, chirp sort ordering, duplicate-email 409, and restricting the file server to the assets directory.
2026-08-15 22:07:00 -05:00
parent aaa913ccab
commit cf79c8a626
12 changed files with 966 additions and 817 deletions
@@ -0,0 +1,74 @@
+package server
+
+import (
+	"fmt"
+	"net/http"
+
+	"github.com/StevanFreeborn/chirpy/internal/api"
+)
+
+// handleFiles serves static assets and counts requests for the metrics page.
+func (s *Server) handleFiles(prefix string) http.Handler {
+	fileServer := http.StripPrefix(prefix, http.FileServer(http.Dir("./assets")))
+
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		s.fileServerHits.Add(1)
+		fileServer.ServeHTTP(w, r)
+	})
+}
+
+// HandleIndex serves the static landing page and counts the visit.
+func (s *Server) HandleIndex(w http.ResponseWriter, r *http.Request) {
+	s.fileServerHits.Add(1)
+
+	w.Header().Add("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write(s.indexHTML)
+}
+
+// HandleHealthChecks reports that the service is up.
+func (s *Server) HandleHealthChecks(w http.ResponseWriter, r *http.Request) {
+	w.Header().Add("Content-Type", "text/plain; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte("OK"))
+}
+
+// HandleReset clears the file server hit counter and deletes all users. It is
+// only available when the platform is "dev".
+func (s *Server) HandleReset(w http.ResponseWriter, r *http.Request) {
+	if s.platform != "dev" {
+		w.WriteHeader(http.StatusForbidden)
+		return
+	}
+
+	s.fileServerHits.Store(0)
+
+	if err := s.db.DeleteAllUsers(r.Context()); err != nil {
+		api.WriteError(w, http.StatusInternalServerError, "Failed to reset database")
+		return
+	}
+
+	w.Header().Add("Content-Type", "text/plain; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+	w.Write([]byte("OK"))
+}
+
+// HandleMetrics renders the admin page showing how many times the file server
+// has been hit.
+func (s *Server) HandleMetrics(w http.ResponseWriter, r *http.Request) {
+	hits := s.fileServerHits.Load()
+
+	w.Header().Add("Content-Type", "text/html; charset=utf-8")
+	w.WriteHeader(http.StatusOK)
+
+	template := `
+	<html>
+	  <body>
+		  <h1>Welcome, Chirpy Admin</h1>
+			<p>Chirpy has been visited %d times!</p>
+		</body>
+	</html>
+	`
+
+	fmt.Fprintf(w, template, hits)
+}