/
util.go
180 lines (158 loc) · 4.83 KB
/
util.go
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package internalstorage
import (
"fmt"
"reflect"
"strconv"
"gorm.io/gorm"
"gorm.io/gorm/clause"
apierrors "k8s.io/apimachinery/pkg/api/errors"
"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
"k8s.io/apimachinery/pkg/runtime"
"k8s.io/apimachinery/pkg/runtime/schema"
"k8s.io/apimachinery/pkg/selection"
"k8s.io/apimachinery/pkg/util/sets"
"k8s.io/apimachinery/pkg/util/validation/field"
internal "github.com/clusterpedia-io/clusterpedia/pkg/apis/clusterpedia"
)
var (
supportedOrderByFields = sets.NewString("cluster", "namespace", "name", "created_at", "resource_version")
)
func applyListOptionsToQuery(query *gorm.DB, opts *internal.ListOptions, applyFn func(query *gorm.DB, opts *internal.ListOptions) (*gorm.DB, error)) (int64, *gorm.DB, error) {
switch len(opts.ClusterNames) {
case 0:
case 1:
query = query.Where("cluster = ?", opts.ClusterNames[0])
default:
query = query.Where("cluster IN ?", opts.ClusterNames)
}
switch len(opts.Namespaces) {
case 0:
case 1:
query = query.Where("namespace = ?", opts.Namespaces[0])
default:
query = query.Where("namespace IN ?", opts.Namespaces)
}
switch len(opts.Names) {
case 0:
case 1:
query = query.Where("name = ?", opts.Names[0])
default:
query = query.Where("name IN ?", opts.Names)
}
if opts.Since != nil {
query = query.Where("created_at >= ?", opts.Since.Time.UTC())
}
if opts.Before != nil {
query = query.Where("created_at < ?", opts.Before.Time.UTC())
}
if opts.LabelSelector != nil {
if requirements, selectable := opts.LabelSelector.Requirements(); selectable {
for _, requirement := range requirements {
values := requirement.Values().List()
jsonQuery := JSONQuery("object", "metadata", "labels", requirement.Key())
switch requirement.Operator() {
case selection.Exists:
jsonQuery.Exist()
case selection.DoesNotExist:
jsonQuery.NotExist()
case selection.Equals, selection.DoubleEquals:
jsonQuery.Equal(values[0])
case selection.NotEquals:
jsonQuery.NotEqual(values[0])
case selection.In:
jsonQuery.In(values...)
case selection.NotIn:
jsonQuery.NotIn(values...)
default:
continue
}
query = query.Where(jsonQuery)
}
}
}
if opts.EnhancedFieldSelector != nil {
if requirements, selectable := opts.EnhancedFieldSelector.Requirements(); selectable {
for _, requirement := range requirements {
var (
fields []string
fieldErrors field.ErrorList
)
for _, f := range requirement.Fields() {
if f.IsList() {
fieldErrors = append(fieldErrors, field.Invalid(f.Path(), f.Name(), fmt.Sprintf("Storage<%s>: Not Support list field", StorageName)))
continue
}
fields = append(fields, f.Name())
}
if len(fieldErrors) != 0 {
return 0, nil, apierrors.NewInvalid(schema.GroupKind{Group: internal.GroupName, Kind: "ListOptions"}, "fieldSelector", fieldErrors)
}
values := requirement.Values().List()
jsonQuery := JSONQuery("object", fields...)
switch requirement.Operator() {
case selection.Exists:
jsonQuery.Exist()
case selection.DoesNotExist:
jsonQuery.NotExist()
case selection.Equals, selection.DoubleEquals:
jsonQuery.Equal(values[0])
case selection.NotEquals:
jsonQuery.NotEqual(values[0])
case selection.In:
jsonQuery.In(values...)
case selection.NotIn:
jsonQuery.NotIn(values...)
default:
continue
}
query = query.Where(jsonQuery)
}
}
}
if applyFn != nil {
var err error
query, err = applyFn(query, opts)
if err != nil {
return 0, nil, err
}
}
// Due to performance reasons, the default order by is not set.
// https://github.com/clusterpedia-io/clusterpedia/pull/44
for _, orderby := range opts.OrderBy {
if supportedOrderByFields.Has(orderby.Field) {
column := clause.OrderByColumn{
Column: clause.Column{Name: orderby.Field, Raw: true},
Desc: orderby.Desc,
}
query = query.Order(column)
}
// if orderby.Field is unsupported, return invalid error?
}
if opts.Limit != -1 {
query = query.Limit(int(opts.Limit))
}
offset, err := strconv.Atoi(opts.Continue)
if err == nil {
query = query.Offset(offset)
}
return int64(offset), query, nil
}
func getNewItemFunc(listObj runtime.Object, v reflect.Value) func() runtime.Object {
if _, isUnstructuredList := listObj.(*unstructured.UnstructuredList); isUnstructuredList {
return func() runtime.Object {
return &unstructured.Unstructured{Object: map[string]interface{}{}}
}
}
elem := v.Type().Elem()
return func() runtime.Object {
return reflect.New(elem).Interface().(runtime.Object)
}
}
func appendListItem(v reflect.Value, data []byte, codec runtime.Codec, newItemFunc func() runtime.Object) error {
obj, _, err := codec.Decode(data, nil, newItemFunc())
if err != nil {
return err
}
v.Set(reflect.Append(v, reflect.ValueOf(obj).Elem()))
return nil
}