Add API for resolver

internal/dis/component/resolver/api.go

@@ -0,0 +1,53 @@
+package resolver
+
+import (
+	"context"
+	"net/http"
+
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth/api"
+	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/auth/scopes"
+	"github.com/tkw1536/pkglib/httpx"
+)
+
+type API struct {
+	component.Base
+	Dependencies struct {
+		Auth     *auth.Auth
+		Resolver *Resolver
+	}
+}
+
+var (
+	_ component.Routeable = (*API)(nil)
+)
+
+func (api *API) Routes() component.Routes {
+	return component.Routes{
+		Prefix: "/api/v1/resolve/",
+		Exact:  true,
+	}
+}
+
+func (a *API) HandleRoute(ctx context.Context, path string) (http.Handler, error) {
+	return &api.Handler[string]{
+		Config: a.Config,
+		Auth:   a.Dependencies.Auth,
+
+		Methods: []string{"GET"},
+
+		Scope: scopes.ScopeResolver,
+		Handler: func(s string, r *http.Request) (string, error) {
+			uri := r.URL.Query().Get("uri")
+			if uri == "" {
+				return "", httpx.ErrBadRequest
+			}
+			target := a.Dependencies.Resolver.Target(uri)
+			if target == "" {
+				return "", httpx.ErrNotFound
+			}
+			return target, nil
+		},
+	}, nil
+}