Begin rework of the instances page

internal/dis/component/server/admin/grants.go

@@ -1,186 +0,0 @@
-package admin
-
-import (
-	"context"
-	_ "embed"
-	"fmt"
-	"html/template"
-	"net/http"
-
-	"github.com/FAU-CDI/wisski-distillery/internal/dis/component"
-	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/instances"
-	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/assets"
-	"github.com/FAU-CDI/wisski-distillery/internal/dis/component/server/templating"
-	"github.com/FAU-CDI/wisski-distillery/internal/models"
-	"github.com/FAU-CDI/wisski-distillery/internal/wisski"
-	"github.com/tkw1536/pkglib/httpx"
-	"github.com/tkw1536/pkglib/httpx/field"
-
-	"github.com/julienschmidt/httprouter"
-	"golang.org/x/exp/maps"
-	"golang.org/x/exp/slices"
-)
-
-//go:embed "html/grants.html"
-var grantsHTML []byte
-var grantsTemplate = templating.Parse[grantsContext](
-	"grants.html", grantsHTML, nil,
-
-	templating.Assets(assets.AssetsAdmin),
-)
-
-type grantsContext struct {
-	templating.RuntimeFlags
-
-	Error string
-
-	instance *wisski.WissKI
-	Instance models.Instance // current instance
-
-	Grants    []models.Grant // grants that exist for the user
-	Usernames []string       // unuused distillery usernames
-	Drupals   []string       // unusued drupal usernames
-}
-
-func (admin *Admin) grants(ctx context.Context) http.Handler {
-	tpl := grantsTemplate.Prepare(
-		admin.dependencies.Templating,
-		templating.Crumbs(
-			menuAdmin,
-			menuInstances,
-			menuInstance,
-			menuGrants,
-		),
-	)
-
-	return tpl.HTMLHandlerWithFlags(func(r *http.Request) (grantsContext, []templating.FlagFunc, error) {
-		if r.Method == http.MethodGet {
-			return admin.getGrants(r)
-		} else {
-			return admin.postGrants(r)
-		}
-	})
-}
-
-func (admin *Admin) getGrants(r *http.Request) (gc grantsContext, funcs []templating.FlagFunc, err error) {
-	slug := httprouter.ParamsFromContext(r.Context()).ByName("slug")
-
-	funcs, err = gc.use(r, slug, admin)
-	if err != nil {
-		return gc, nil, err
-	}
-
-	if err := gc.useGrants(r, admin); err != nil {
-		return gc, nil, err
-	}
-
-	return gc, funcs, nil
-}
-
-func (admin *Admin) postGrants(r *http.Request) (gc grantsContext, funcs []templating.FlagFunc, err error) {
-	// parse the form
-	if err := r.ParseForm(); err != nil {
-		return gc, nil, err
-	}
-
-	// read out the form values
-	var (
-		slug           = r.PostFormValue("slug")
-		delete         = r.PostFormValue("action") == "delete"
-		distilleryUser = r.PostFormValue("distillery-user")
-		drupalUser     = r.PostFormValue("drupal-user")
-		adminRole      = r.PostFormValue("admin") == field.CheckboxChecked
-	)
-
-	// set the common fields
-	funcs, err = gc.use(r, slug, admin)
-	if err != nil {
-		return gc, nil, err
-	}
-
-	if delete {
-		// delete the user grant
-		err := admin.dependencies.Policy.Remove(r.Context(), distilleryUser, slug)
-		if err != nil {
-			return gc, nil, err
-		}
-	} else {
-		// update the grant
-		err := admin.dependencies.Policy.Set(r.Context(), models.Grant{
-			User: distilleryUser,
-			Slug: slug,
-
-			DrupalUsername:  drupalUser,
-			DrupalAdminRole: adminRole,
-		})
-		if err != nil {
-			gc.Error = fmt.Sprintf("Unable to update grant for user %s: %s", distilleryUser, err.Error())
-		}
-	}
-
-	// fetch the grants for the instance
-	if err := gc.useGrants(r, admin); err != nil {
-		return gc, nil, err
-	}
-	return gc, funcs, nil
-}
-
-func (gc *grantsContext) use(r *http.Request, slug string, admin *Admin) (funcs []templating.FlagFunc, err error) {
-	// find the instance itself
-	gc.instance, err = admin.dependencies.Instances.WissKI(r.Context(), slug)
-	if err == instances.ErrWissKINotFound {
-		return nil, httpx.ErrNotFound
-	}
-	if err != nil {
-		return nil, err
-	}
-	gc.Instance = gc.instance.Instance
-
-	// replace the functions
-	funcs = []templating.FlagFunc{
-		templating.ReplaceCrumb(menuInstance, component.MenuItem{Title: "Instance", Path: template.URL("/admin/instance/" + slug)}),
-		templating.ReplaceCrumb(menuGrants, component.MenuItem{Title: "Grants", Path: template.URL("/admin/grants/" + slug)}),
-		templating.Title(gc.Instance.Slug + " - Grants"),
-	}
-	return funcs, nil
-}
-
-func (gc *grantsContext) useGrants(r *http.Request, admin *Admin) (err error) {
-	gc.Grants, err = admin.dependencies.Policy.Instance(r.Context(), gc.Instance.Slug)
-	if err != nil {
-		return err
-	}
-
-	users, err := admin.dependencies.Auth.Users(r.Context())
-	if err != nil {
-		return err
-	}
-
-	// create a namemap of users, but not those already taken
-	userNameMap := make(map[string]struct{}, len(users))
-	for _, user := range users {
-		userNameMap[user.User.User] = struct{}{}
-	}
-	for _, grant := range gc.Grants {
-		delete(userNameMap, grant.User)
-	}
-
-	// setup the usernames
-	gc.Usernames = maps.Keys(userNameMap)
-	slices.Sort(gc.Usernames)
-
-	// get the drupal usernames
-	drupals, err := gc.instance.Users().All(r.Context(), nil)
-	if err != nil {
-		return err
-	}
-
-	// and convert them to strings only
-	gc.Drupals = make([]string, len(drupals))
-	for i, drupal := range drupals {
-		gc.Drupals[i] = string(drupal.Name)
-	}
-	slices.Sort(gc.Drupals)
-
-	return nil
-}