github.com/spotmaxtech/k8s-apimachinery-v0260@v0.0.1/pkg/api/meta/table/table.go (about)

     1  /*
     2  Copyright 2018 The Kubernetes Authors.
     3  
     4  Licensed under the Apache License, Version 2.0 (the "License");
     5  you may not use this file except in compliance with the License.
     6  You may obtain a copy of the License at
     7  
     8      http://www.apache.org/licenses/LICENSE-2.0
     9  
    10  Unless required by applicable law or agreed to in writing, software
    11  distributed under the License is distributed on an "AS IS" BASIS,
    12  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13  See the License for the specific language governing permissions and
    14  limitations under the License.
    15  */
    16  
    17  package table
    18  
    19  import (
    20  	"time"
    21  
    22  	"github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/api/meta"
    23  	metav1 "github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/apis/meta/v1"
    24  	"github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/runtime"
    25  	"github.com/spotmaxtech/k8s-apimachinery-v0260/pkg/util/duration"
    26  )
    27  
    28  // MetaToTableRow converts a list or object into one or more table rows. The provided rowFn is invoked for
    29  // each accessed item, with name and age being passed to each.
    30  func MetaToTableRow(obj runtime.Object, rowFn func(obj runtime.Object, m metav1.Object, name, age string) ([]interface{}, error)) ([]metav1.TableRow, error) {
    31  	if meta.IsListType(obj) {
    32  		rows := make([]metav1.TableRow, 0, 16)
    33  		err := meta.EachListItem(obj, func(obj runtime.Object) error {
    34  			nestedRows, err := MetaToTableRow(obj, rowFn)
    35  			if err != nil {
    36  				return err
    37  			}
    38  			rows = append(rows, nestedRows...)
    39  			return nil
    40  		})
    41  		if err != nil {
    42  			return nil, err
    43  		}
    44  		return rows, nil
    45  	}
    46  
    47  	rows := make([]metav1.TableRow, 0, 1)
    48  	m, err := meta.Accessor(obj)
    49  	if err != nil {
    50  		return nil, err
    51  	}
    52  	row := metav1.TableRow{
    53  		Object: runtime.RawExtension{Object: obj},
    54  	}
    55  	row.Cells, err = rowFn(obj, m, m.GetName(), ConvertToHumanReadableDateType(m.GetCreationTimestamp()))
    56  	if err != nil {
    57  		return nil, err
    58  	}
    59  	rows = append(rows, row)
    60  	return rows, nil
    61  }
    62  
    63  // ConvertToHumanReadableDateType returns the elapsed time since timestamp in
    64  // human-readable approximation.
    65  func ConvertToHumanReadableDateType(timestamp metav1.Time) string {
    66  	if timestamp.IsZero() {
    67  		return "<unknown>"
    68  	}
    69  	return duration.HumanDuration(time.Since(timestamp.Time))
    70  }