mirror of
https://github.com/grafana/grafana.git
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83 lines
3.0 KiB
Go
83 lines
3.0 KiB
Go
package entity
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import (
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apierrors "k8s.io/apimachinery/pkg/api/errors"
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"k8s.io/apimachinery/pkg/labels"
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"k8s.io/apimachinery/pkg/selection"
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"github.com/grafana/grafana/pkg/apimachinery/utils"
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)
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const SortByKey = "grafana.app/sortBy"
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const ListDeletedKey = "grafana.app/listDeleted"
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const ListHistoryKey = "grafana.app/listHistory"
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type Requirements struct {
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// Equals folder
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Folder *string
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// SortBy is a list of fields to sort by
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SortBy []string
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// ListDeleted is a flag to list deleted entities
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ListDeleted bool
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// ListHistory is a resource name to list the history of
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ListHistory string
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}
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func ReadLabelSelectors(selector labels.Selector) (Requirements, labels.Selector, error) {
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requirements := Requirements{}
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newSelector := labels.NewSelector()
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if selector == nil {
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return requirements, newSelector, nil
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}
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labelSelectors, _ := selector.Requirements()
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for _, r := range labelSelectors {
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switch r.Key() {
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case utils.AnnoKeyFolder:
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if (r.Operator() != selection.Equals) && (r.Operator() != selection.DoubleEquals) {
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return requirements, newSelector, apierrors.NewBadRequest(utils.AnnoKeyFolder + " label selector only supports equality")
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}
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folder := r.Values().List()[0]
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requirements.Folder = &folder
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case SortByKey:
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if r.Operator() != selection.In {
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return requirements, newSelector, apierrors.NewBadRequest(SortByKey + " label selector only supports in")
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}
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requirements.SortBy = r.Values().List()
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case ListDeletedKey:
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if r.Operator() != selection.Equals {
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return requirements, newSelector, apierrors.NewBadRequest(ListDeletedKey + " label selector only supports equality")
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}
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if len(r.Values().List()) != 1 {
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return requirements, newSelector, apierrors.NewBadRequest(ListDeletedKey + " label selector only supports one value")
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}
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if r.Values().List()[0] != "true" && r.Values().List()[0] != "false" {
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return requirements, newSelector, apierrors.NewBadRequest(ListDeletedKey + " label selector only supports true or false")
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}
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requirements.ListDeleted = r.Values().List()[0] == "true"
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case ListHistoryKey:
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if r.Operator() != selection.Equals {
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return requirements, newSelector, apierrors.NewBadRequest(ListHistoryKey + " label selector only supports equality")
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}
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if len(r.Values().List()) != 1 {
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return requirements, newSelector, apierrors.NewBadRequest(ListHistoryKey + " label selector only supports one value")
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}
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if r.Values().List()[0] == "" {
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return requirements, newSelector, apierrors.NewBadRequest(ListHistoryKey + " label selector must not be empty")
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}
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requirements.ListHistory = r.Values().List()[0]
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// add all unregonized label selectors to the new selector list, these will be processed by the entity store
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default:
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newSelector = newSelector.Add(r)
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}
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}
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if requirements.ListDeleted && requirements.ListHistory != "" {
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return requirements, newSelector, apierrors.NewBadRequest("cannot list deleted and history at the same time")
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}
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return requirements, newSelector, nil
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}
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