Merge pull request #12 from ts170710/add_quota_list

Add loadbalance quota list

Author: xieyunyue

openstack/loadbalancer/v2/quotas/requests.go

@@ -2,6 +2,7 @@ package quotas
 
 import (
 	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/pagination"
 )
 
 // Get returns load balancer Quotas for a project.
@@ -11,6 +12,14 @@ func Get(client *gophercloud.ServiceClient, projectID string) (r GetResult) {
 	return
 }
 
+// List returns load balancer Quotas.
+func List(client *gophercloud.ServiceClient) pagination.Pager {
+	url := getURL(client, "")
+	return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
+		return QuotaPage{pagination.LinkedPageBase{PageResult: r}}
+	})
+}
+
 // UpdateOptsBuilder allows extensions to add additional parameters to the
 // Update request.
 type UpdateOptsBuilder interface {

openstack/loadbalancer/v2/quotas/results.go

@@ -4,6 +4,7 @@ import (
 	"encoding/json"
 
 	"github.com/gophercloud/gophercloud"
+	"github.com/gophercloud/gophercloud/pagination"
 )
 
 type commonResult struct {
@@ -19,6 +20,39 @@ func (r commonResult) Extract() (*Quota, error) {
 	return s.Quota, err
 }
 
+type QuotaPage struct {
+	pagination.LinkedPageBase
+}
+
+func (r QuotaPage) NextPageURL() (string, error) {
+	var s struct {
+		Links []gophercloud.Link `json:"quota_links"`
+	}
+	err := r.ExtractInto(&s)
+	if err != nil {
+		return "", err
+	}
+	return gophercloud.ExtractNextURL(s.Links)
+}
+
+// IsEmpty checks whether a QuotaPage struct is empty.
+func (r QuotaPage) IsEmpty() (bool, error) {
+	if r.StatusCode == 204 {
+		return true, nil
+	}
+
+	is, err := ExtractQuotas(r)
+	return len(is) == 0, err
+}
+
+func ExtractQuotas(r pagination.Page) ([]Quota, error) {
+	var s struct {
+		Quotas []Quota `json:"quotas"`
+	}
+	err := (r.(QuotaPage)).ExtractInto(&s)
+	return s.Quotas, err
+}
+
 // GetResult represents the result of a get operation. Call its Extract
 // method to interpret it as a Quota.
 type GetResult struct {