github.com/opentelekomcloud/gophertelekomcloud@v0.9.3/openstack/bms/v2/nics/list.go (about)

     1  package nics
     2  
     3  import (
     4  	"reflect"
     5  
     6  	"github.com/opentelekomcloud/gophertelekomcloud"
     7  	"github.com/opentelekomcloud/gophertelekomcloud/pagination"
     8  )
     9  
    10  // ListOpts allows the filtering and sorting of paginated collections through
    11  // the API.
    12  type ListOpts struct {
    13  	// ID is the unique identifier for the nic.
    14  	ID string `json:"port_id"`
    15  
    16  	// Status indicates whether a nic is currently operational.
    17  	Status string `json:"port_state"`
    18  }
    19  
    20  // List returns collection of nics. It accepts a ListOpts struct, which allows you to filter and sort
    21  // the returned collection for greater efficiency.
    22  func List(client *golangsdk.ServiceClient, serverId string, opts ListOpts) ([]Nic, error) {
    23  	pages, err := pagination.NewPager(client, client.ServiceURL("servers", serverId, "os-interface"),
    24  		func(r pagination.PageResult) pagination.Page {
    25  			return NicPage{pagination.LinkedPageBase{PageResult: r}}
    26  		}).AllPages()
    27  	if err != nil {
    28  		return nil, err
    29  	}
    30  
    31  	allNICs, err := ExtractNics(pages)
    32  	if err != nil {
    33  		return nil, err
    34  	}
    35  
    36  	return filterNICs(allNICs, opts)
    37  }
    38  
    39  // filterNICs used to filter nics using id and status.
    40  func filterNICs(nics []Nic, opts ListOpts) ([]Nic, error) {
    41  
    42  	var refinedNICs []Nic
    43  	var matched bool
    44  	m := map[string]interface{}{}
    45  
    46  	if opts.ID != "" {
    47  		m["ID"] = opts.ID
    48  	}
    49  	if opts.Status != "" {
    50  		m["Status"] = opts.Status
    51  	}
    52  	if len(m) > 0 && len(nics) > 0 {
    53  		for _, nic := range nics {
    54  			matched = true
    55  
    56  			for key, value := range m {
    57  				if sVal := getStructField(&nic, key); !(sVal == value) {
    58  					matched = false
    59  				}
    60  			}
    61  
    62  			if matched {
    63  				refinedNICs = append(refinedNICs, nic)
    64  			}
    65  		}
    66  
    67  	} else {
    68  		refinedNICs = nics
    69  	}
    70  
    71  	return refinedNICs, nil
    72  }
    73  
    74  func getStructField(v *Nic, field string) string {
    75  	r := reflect.ValueOf(v)
    76  	f := reflect.Indirect(r).FieldByName(field)
    77  	return f.String()
    78  }