corteza/compose/rest/namespace.go

package rest

import (
	"context"
	"fmt"
	"io"
	"net/http"
	"time"

	"github.com/cortezaproject/corteza-server/compose/rest/request"
	"github.com/cortezaproject/corteza-server/compose/service"
	"github.com/cortezaproject/corteza-server/compose/service/event"
	"github.com/cortezaproject/corteza-server/compose/types"
	"github.com/cortezaproject/corteza-server/pkg/api"
	"github.com/cortezaproject/corteza-server/pkg/corredor"
	"github.com/cortezaproject/corteza-server/pkg/envoy"
	"github.com/cortezaproject/corteza-server/pkg/envoy/resource"
	envoyStore "github.com/cortezaproject/corteza-server/pkg/envoy/store"
	"github.com/cortezaproject/corteza-server/pkg/envoy/yaml"
	"github.com/cortezaproject/corteza-server/pkg/filter"
)

type (
	namespacePayload struct {
		*types.Namespace

		CanGrant           bool `json:"canGrant"`
		CanUpdateNamespace bool `json:"canUpdateNamespace"`
		CanDeleteNamespace bool `json:"canDeleteNamespace"`
		CanManageNamespace bool `json:"canManageNamespace"`
		CanCreateModule    bool `json:"canCreateModule"`
		CanCreateChart     bool `json:"canCreateChart"`
		CanCreatePage      bool `json:"canCreatePage"`
	}

	namespaceSetPayload struct {
		Filter types.NamespaceFilter `json:"filter"`
		Set    []*namespacePayload   `json:"set"`
	}

	Namespace struct {
		namespace  service.NamespaceService
		locale     service.ResourceTranslationsManagerService
		attachment service.AttachmentService
		ac         namespaceAccessController
	}

	namespaceAccessController interface {
		CanGrant(context.Context) bool

		CanUpdateNamespace(context.Context, *types.Namespace) bool
		CanDeleteNamespace(context.Context, *types.Namespace) bool
		CanManageNamespace(context.Context, *types.Namespace) bool

		CanCreateModuleOnNamespace(context.Context, *types.Namespace) bool
		CanCreateChartOnNamespace(context.Context, *types.Namespace) bool
		CanCreatePageOnNamespace(context.Context, *types.Namespace) bool
	}
)

func (Namespace) New() *Namespace {
	return &Namespace{
		namespace:  service.DefaultNamespace,
		locale:     service.DefaultResourceTranslation,
		attachment: service.DefaultAttachment,
		ac:         service.DefaultAccessControl,
	}
}

func (ctrl Namespace) List(ctx context.Context, r *request.NamespaceList) (interface{}, error) {
	var (
		err error
		f   = types.NamespaceFilter{
			Query:  r.Query,
			Slug:   r.Slug,
			Labels: r.Labels,
		}
	)

	if f.Paging, err = filter.NewPaging(r.Limit, r.PageCursor); err != nil {
		return nil, err
	}

	if f.Sorting, err = filter.NewSorting(r.Sort); err != nil {
		return nil, err
	}

	set, filter, err := ctrl.namespace.Find(ctx, f)
	return ctrl.makeFilterPayload(ctx, set, filter, err)
}

func (ctrl Namespace) Create(ctx context.Context, r *request.NamespaceCreate) (interface{}, error) {
	var (
		err error
		ns  = &types.Namespace{
			Name:    r.Name,
			Slug:    r.Slug,
			Enabled: r.Enabled,
			Labels:  r.Labels,
		}
	)

	if err = r.Meta.Unmarshal(&ns.Meta); err != nil {
		return nil, err
	}

	ns, err = ctrl.namespace.Create(ctx, ns)
	return ctrl.makePayload(ctx, ns, err)
}

func (ctrl Namespace) Read(ctx context.Context, r *request.NamespaceRead) (interface{}, error) {
	ns, err := ctrl.namespace.FindByID(ctx, r.NamespaceID)
	return ctrl.makePayload(ctx, ns, err)
}

func (ctrl Namespace) ListTranslations(ctx context.Context, r *request.NamespaceListTranslations) (interface{}, error) {
	return ctrl.locale.Namespace(ctx, r.NamespaceID)
}

func (ctrl Namespace) UpdateTranslations(ctx context.Context, r *request.NamespaceUpdateTranslations) (interface{}, error) {
	return api.OK(), ctrl.locale.Upsert(ctx, r.Translations)
}

func (ctrl Namespace) Update(ctx context.Context, r *request.NamespaceUpdate) (interface{}, error) {
	var (
		err error
		ns  = &types.Namespace{
			ID:        r.NamespaceID,
			Name:      r.Name,
			Slug:      r.Slug,
			Enabled:   r.Enabled,
			Labels:    r.Labels,
			UpdatedAt: r.UpdatedAt,
		}
	)

	if err = r.Meta.Unmarshal(&ns.Meta); err != nil {
		return nil, err
	}

	ns, err = ctrl.namespace.Update(ctx, ns)
	return ctrl.makePayload(ctx, ns, err)
}

func (ctrl Namespace) Delete(ctx context.Context, r *request.NamespaceDelete) (interface{}, error) {
	_, err := ctrl.namespace.FindByID(ctx, r.NamespaceID)
	if err != nil {
		return nil, err
	}

	return api.OK(), ctrl.namespace.DeleteByID(ctx, r.NamespaceID)
}

func (ctrl Namespace) Upload(ctx context.Context, r *request.NamespaceUpload) (interface{}, error) {
	file, err := r.Upload.Open()
	if err != nil {
		return nil, err
	}
	defer file.Close()

	a, err := ctrl.attachment.CreateNamespaceAttachment(
		ctx,
		r.Upload.Filename,
		r.Upload.Size,
		file,
	)
	if err != nil {
		return nil, err
	}

	return makeAttachmentPayload(ctx, a, err)
}

func (ctrl Namespace) Clone(ctx context.Context, r *request.NamespaceClone) (interface{}, error) {
	dup := &types.Namespace{
		Name: r.Name,
		Slug: r.Slug,
	}

	// prepare filters
	df := envoyStore.NewDecodeFilter()

	// - compose resources
	df = df.ComposeNamespace(&types.NamespaceFilter{
		NamespaceID: []uint64{r.NamespaceID},
	}).
		ComposeModule(&types.ModuleFilter{}).
		ComposePage(&types.PageFilter{}).
		ComposeChart(&types.ChartFilter{})

	// - workflow
	// @todo how do we want to handle these ones?
	//       do we handle these ones?

	decoder := func() (resource.InterfaceSet, error) {
		// get from store
		return envoyStore.Decoder().Decode(ctx, service.DefaultStore, df)
	}

	encoder := func(nn resource.InterfaceSet) error {
		// prepare for encoding
		se := envoyStore.NewStoreEncoder(service.DefaultStore, &envoyStore.EncoderConfig{})
		bld := envoy.NewBuilder(se)
		g, err := bld.Build(ctx, nn...)
		if err != nil {
			return err
		}

		return envoy.Encode(ctx, g, se)
	}

	ns, err := ctrl.namespace.Clone(ctx, r.NamespaceID, dup, decoder, encoder)
	return ctrl.makePayload(ctx, ns, err)
}

func (ctrl Namespace) Export(ctx context.Context, r *request.NamespaceExport) (interface{}, error) {
	var (
		// @todo support multiple archive types
		ext  = "zip"
		file = fmt.Sprintf("%s.%s", r.Filename, ext)
	)

	// prepare filters
	df := envoyStore.NewDecodeFilter()

	// - compose resources
	df = df.ComposeNamespace(&types.NamespaceFilter{
		NamespaceID: []uint64{r.NamespaceID},
	}).
		ComposeModule(&types.ModuleFilter{}).
		ComposePage(&types.PageFilter{}).
		ComposeChart(&types.ChartFilter{})

	// - workflow
	// @todo how do we want to handle these ones?
	//       do we handle these ones?

	decoder := func() (resource.InterfaceSet, error) {
		// get from store
		sd := envoyStore.Decoder()
		return sd.Decode(ctx, service.DefaultStore, df)
	}

	encoder := func(nn resource.InterfaceSet) (envoy.Streamer, error) {
		// prepare for encoding
		ye := yaml.NewYamlEncoder(&yaml.EncoderConfig{})
		bld := envoy.NewBuilder(ye)
		g, err := bld.Build(ctx, nn...)
		if err != nil {
			return nil, err
		}

		err = envoy.Encode(ctx, g, ye)
		return ye, err
	}

	rs, err := ctrl.namespace.Export(ctx, r.NamespaceID, ext, decoder, encoder)
	return ctrl.serveExport(ctx, file, rs, err)
}

func (ctrl Namespace) ImportInit(ctx context.Context, r *request.NamespaceImportInit) (interface{}, error) {
	f, err := r.Upload.Open()
	if err != nil {
		return nil, err
	}
	defer f.Close()

	return ctrl.namespace.ImportInit(ctx, f, r.Upload.Size)
}

func (ctrl Namespace) ImportRun(ctx context.Context, r *request.NamespaceImportRun) (interface{}, error) {
	var (
		dup = &types.Namespace{
			Name: r.Name,
			Slug: r.Slug,
		}

		encoder = func(nn resource.InterfaceSet) error {
			se := envoyStore.NewStoreEncoder(service.DefaultStore, &envoyStore.EncoderConfig{})

			bld := envoy.NewBuilder(se)
			g, err := bld.Build(ctx, nn...)
			if err != nil {
				return err
			}

			err = envoy.Encode(ctx, g, se)
			if err != nil {
				return err
			}

			return nil
		}
	)

	ns, err := ctrl.namespace.ImportRun(ctx, r.SessionID, dup, encoder)
	return ctrl.makePayload(ctx, ns, err)
}

func (ctrl Namespace) serveExport(ctx context.Context, fn string, archive io.ReadSeeker, err error) (interface{}, error) {
	if err != nil {
		return nil, err
	}

	return func(w http.ResponseWriter, req *http.Request) {
		w.Header().Add("Content-Disposition", "attachment; filename="+fn)

		http.ServeContent(w, req, fn, time.Now(), archive)
	}, nil
}

func (ctrl *Namespace) TriggerScript(ctx context.Context, r *request.NamespaceTriggerScript) (rsp interface{}, err error) {
	var (
		namespace *types.Namespace
	)

	if namespace, err = ctrl.namespace.FindByID(ctx, r.NamespaceID); err != nil {
		return
	}

	err = corredor.Service().Exec(ctx, r.Script, event.NamespaceOnManual(namespace, nil))
	return ctrl.makePayload(ctx, namespace, err)
}

func (ctrl Namespace) makePayload(ctx context.Context, ns *types.Namespace, err error) (*namespacePayload, error) {
	if err != nil || ns == nil {
		return nil, err
	}

	return &namespacePayload{
		Namespace: ns,

		CanGrant:           ctrl.ac.CanGrant(ctx),
		CanUpdateNamespace: ctrl.ac.CanUpdateNamespace(ctx, ns),
		CanDeleteNamespace: ctrl.ac.CanDeleteNamespace(ctx, ns),
		CanManageNamespace: ctrl.ac.CanManageNamespace(ctx, ns),

		CanCreateModule: ctrl.ac.CanCreateModuleOnNamespace(ctx, ns),
		CanCreateChart:  ctrl.ac.CanCreateChartOnNamespace(ctx, ns),
		CanCreatePage:   ctrl.ac.CanCreatePageOnNamespace(ctx, ns),
	}, nil
}

func (ctrl Namespace) makeFilterPayload(ctx context.Context, nn types.NamespaceSet, f types.NamespaceFilter, err error) (*namespaceSetPayload, error) {
	if err != nil {
		return nil, err
	}

	nsp := &namespaceSetPayload{Filter: f, Set: make([]*namespacePayload, len(nn))}

	for i := range nn {
		nsp.Set[i], _ = ctrl.makePayload(ctx, nn[i], nil)
	}

	return nsp, nil
}