/
collectionresource_storage.go
246 lines (218 loc) · 6.65 KB
/
collectionresource_storage.go
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package internalstorage
import (
"context"
"fmt"
"net/url"
"strconv"
"strings"
"gorm.io/gorm"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
internal "github.com/clusterpedia-io/api/clusterpedia"
"github.com/clusterpedia-io/clusterpedia/pkg/storage"
)
const (
URLQueryGroups = "groups"
URLQueryResources = "resources"
)
type CollectionResourceStorage struct {
db *gorm.DB
typesQuery *gorm.DB
collectionResource *internal.CollectionResource
}
func NewCollectionResourceStorage(db *gorm.DB, cr *internal.CollectionResource) storage.CollectionResourceStorage {
storage := &CollectionResourceStorage{db: db, collectionResource: cr.DeepCopy()}
if len(cr.ResourceTypes) == 0 {
return storage
}
typesQuery := db
groups := make([]string, 0)
for _, rt := range cr.ResourceTypes {
if rt.Resource == "" && rt.Version == "" {
groups = append(groups, rt.Group)
continue
}
where := map[string]interface{}{"group": rt.Group}
if rt.Resource != "" {
where["resource"] = rt.Resource
}
if rt.Version != "" {
where["version"] = rt.Version
}
typesQuery = typesQuery.Or(where)
}
if len(groups) != 0 {
typesQuery = typesQuery.Or(map[string]interface{}{"group": groups})
}
storage.typesQuery = typesQuery
return storage
}
func (s *CollectionResourceStorage) query(ctx context.Context, opts *internal.ListOptions) (*gorm.DB, ObjectList, error) {
var result ObjectList = &ResourceList{}
if opts.OnlyMetadata {
result = &ResourceMetadataList{}
}
query := s.db.WithContext(ctx).Model(&Resource{})
if s.typesQuery != nil {
return result.Select(query).Where(s.typesQuery), result, nil
}
// The `URLQueryGroups` and `URLQueryResources` only works on *Any Collection Resource*,
// does it nned to work on other collection resources?
gvrs, err := resolveGVRsFromURLQuery(opts.URLQuery)
if err != nil {
return nil, nil, apierrors.NewBadRequest(err.Error())
}
if len(gvrs) == 0 {
return nil, nil, apierrors.NewBadRequest("url query - `groups` or `resources` is required")
}
typesQuery := s.db
for _, gvr := range gvrs {
where := map[string]interface{}{"group": gvr.Group}
if gvr.Version != "" {
where["version"] = gvr.Version
}
if gvr.Resource != "" {
where["resource"] = gvr.Resource
}
typesQuery = typesQuery.Or(where)
}
return result.Select(query).Where(typesQuery), result, nil
}
func (s *CollectionResourceStorage) Get(ctx context.Context, opts *internal.ListOptions) (*internal.CollectionResource, error) {
query, list, err := s.query(ctx, opts)
if err != nil {
return nil, err
}
offset, amount, query, err := applyListOptionsToCollectionResourceQuery(query, opts)
if err != nil {
return nil, err
}
if err := list.From(query); err != nil {
return nil, InterpretDBError(s.collectionResource.Name, err)
}
items := list.Items()
collection := &internal.CollectionResource{
TypeMeta: s.collectionResource.TypeMeta,
ObjectMeta: s.collectionResource.ObjectMeta,
Items: make([]runtime.Object, 0, len(items)),
}
gvrs := make(map[schema.GroupVersionResource]struct{})
for _, resource := range items {
obj, err := resource.ConvertToUnstructured()
if err != nil {
return nil, err
}
collection.Items = append(collection.Items, obj)
if resourceType := resource.GetResourceType(); !resourceType.Empty() {
gvr := resourceType.GroupVersionResource()
if _, ok := gvrs[gvr]; !ok {
gvrs[gvr] = struct{}{}
collection.ResourceTypes = append(collection.ResourceTypes, internal.CollectionResourceType{
Group: resourceType.Group,
Resource: resourceType.Resource,
Version: resourceType.Version,
Kind: resourceType.Kind,
})
}
}
}
if opts.WithContinue != nil && *opts.WithContinue {
if int64(len(items)) == opts.Limit {
collection.Continue = strconv.FormatInt(offset+opts.Limit, 10)
}
}
if amount != nil {
// When offset is too large, the data in the response is empty and the remaining count is negative.
// This ensures that `amount = offset + len(objects) + remain`
remain := *amount - offset - int64(len(items))
collection.RemainingItemCount = &remain
}
return collection, nil
}
func resolveGVRsFromURLQuery(query url.Values) (gvrs []schema.GroupVersionResource, err error) {
if query.Has(URLQueryGroups) {
for _, group := range strings.Split(query.Get(URLQueryGroups), ",") {
gv, err := parseGroupVersion(group)
if err != nil {
return nil, fmt.Errorf("%s query: %w", URLQueryGroups, err)
}
gvrs = append(gvrs, gv.WithResource(""))
}
}
if query.Has(URLQueryResources) {
for _, resource := range strings.Split(query.Get(URLQueryResources), ",") {
gvr, err := parseGroupVersionResource(resource)
if err != nil {
return nil, fmt.Errorf("%s query: %w", URLQueryResources, err)
}
gvrs = append(gvrs, gvr)
}
}
return
}
func parseGroupVersion(gv string) (schema.GroupVersion, error) {
gv = strings.ReplaceAll(gv, " ", "")
if (len(gv) == 0) || (gv == "/") {
// match legacy group
return schema.GroupVersion{}, nil
}
strs := strings.Split(gv, "/")
switch len(strs) {
case 1:
/*
match:
* "group"
*/
return schema.GroupVersion{Group: strs[0]}, nil
case 2:
/*
match:
* "/"
* "group/version"
* "/version"
* "group/"
*/
return schema.GroupVersion{Group: strs[0], Version: strs[1]}, nil
}
return schema.GroupVersion{}, fmt.Errorf("unexpected GroupVersion string: %v, expect <group> or <group>/<version>", gv)
}
func parseGroupVersionResource(gvr string) (schema.GroupVersionResource, error) {
gvr = strings.ReplaceAll(gvr, " ", "")
if gvr == "" {
return schema.GroupVersionResource{}, fmt.Errorf("unexpected GroupVersionResource string: %v, expect <group>/<resource> or <group>/<version>/<resource>", gvr)
}
strs := strings.Split(gvr, "/")
switch len(strs) {
case 2:
/*
match:
* "group/resource"
* "/resource" in legacy group /api
not match:
* "/"
* "group/"
*/
if strs[1] != "" {
return schema.GroupVersionResource{Group: strs[0], Resource: strs[1]}, nil
}
case 3:
/*
match:
* "group/version/resource"
* "/version/resource"
* "//resource"
* "group//resource"
not match:
* "group/version/"
* "group//"
*/
if strs[2] != "" {
return schema.GroupVersionResource{Group: strs[0], Version: strs[1], Resource: strs[2]}, nil
}
}
return schema.GroupVersionResource{}, fmt.Errorf("unexpected GroupVersionResource string: %v, expect <group>/<resource> or <group>/<version>/<resource>", gvr)
}
func applyListOptionsToCollectionResourceQuery(query *gorm.DB, opts *internal.ListOptions) (int64, *int64, *gorm.DB, error) {
return applyListOptionsToQuery(query, opts, nil)
}