feat(webui): implement states list

pkg/webui/states.go

@@ -0,0 +1,29 @@
+package webui
+
+import (
+	"html/template"
+	"net/http"
+
+	"git.adyxax.org/adyxax/tfstated/pkg/database"
+	"git.adyxax.org/adyxax/tfstated/pkg/model"
+)
+
+var statesTemplates = template.Must(template.ParseFS(htmlFS, "html/base.html", "html/states.html"))
+
+func handleStatesGET(db *database.DB) http.Handler {
+	type StatesData struct {
+		States []model.State
+	}
+	return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Cache-Control", "no-store, no-cache")
+
+		states, err := db.LoadStatesByPath()
+		if err != nil {
+			errorResponse(w, http.StatusInternalServerError, err)
+			return
+		}
+		render(w, statesTemplates, http.StatusOK, StatesData{
+			States: states,
+		})
+	})
+}