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requests.go
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requests.go
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package snapshots
import (
"github.com/chjlangzi/gophercloud"
"github.com/chjlangzi/gophercloud/pagination"
)
// CreateOptsBuilder allows extensions to add additional parameters to the
// Create request.
type CreateOptsBuilder interface {
ToSnapshotCreateMap() (map[string]interface{}, error)
}
// CreateOpts contains options for creating a Snapshot. This object is passed to
// the snapshots.Create function. For more information about these parameters,
// see the Snapshot object.
type CreateOpts struct {
VolumeID string `json:"volume_id" required:"true"`
Force bool `json:"force,omitempty"`
Name string `json:"name,omitempty"`
Description string `json:"description,omitempty"`
Metadata map[string]string `json:"metadata,omitempty"`
}
// ToSnapshotCreateMap assembles a request body based on the contents of a
// CreateOpts.
func (opts CreateOpts) ToSnapshotCreateMap() (map[string]interface{}, error) {
return gophercloud.BuildRequestBody(opts, "snapshot")
}
// Create will create a new Snapshot based on the values in CreateOpts. To
// extract the Snapshot object from the response, call the Extract method on the
// CreateResult.
func Create(client *gophercloud.ServiceClient, opts CreateOptsBuilder) (r CreateResult) {
b, err := opts.ToSnapshotCreateMap()
if err != nil {
r.Err = err
return
}
_, r.Err = client.Post(createURL(client), b, &r.Body, &gophercloud.RequestOpts{
OkCodes: []int{202},
})
return
}
// Delete will delete the existing Snapshot with the provided ID.
func Delete(client *gophercloud.ServiceClient, id string) (r DeleteResult) {
_, r.Err = client.Delete(deleteURL(client, id), nil)
return
}
// Get retrieves the Snapshot with the provided ID. To extract the Snapshot
// object from the response, call the Extract method on the GetResult.
func Get(client *gophercloud.ServiceClient, id string) (r GetResult) {
_, r.Err = client.Get(getURL(client, id), &r.Body, nil)
return
}
// ListOptsBuilder allows extensions to add additional parameters to the List
// request.
type ListOptsBuilder interface {
ToSnapshotListQuery() (string, error)
}
// ListOpts hold options for listing Snapshots. It is passed to the
// snapshots.List function.
type ListOpts struct {
// AllTenants will retrieve snapshots of all tenants/projects.
AllTenants bool `q:"all_tenants"`
// Name will filter by the specified snapshot name.
Name string `q:"name"`
// Status will filter by the specified status.
Status string `q:"status"`
// TenantID will filter by a specific tenant/project ID.
// Setting AllTenants is required to use this.
TenantID string `q:"project_id"`
// VolumeID will filter by a specified volume ID.
VolumeID string `q:"volume_id"`
}
// ToSnapshotListQuery formats a ListOpts into a query string.
func (opts ListOpts) ToSnapshotListQuery() (string, error) {
q, err := gophercloud.BuildQueryString(opts)
return q.String(), err
}
// List returns Snapshots optionally limited by the conditions provided in
// ListOpts.
func List(client *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
url := listURL(client)
if opts != nil {
query, err := opts.ToSnapshotListQuery()
if err != nil {
return pagination.Pager{Err: err}
}
url += query
}
return pagination.NewPager(client, url, func(r pagination.PageResult) pagination.Page {
return SnapshotPage{pagination.SinglePageBase(r)}
})
}
// UpdateMetadataOptsBuilder allows extensions to add additional parameters to
// the Update request.
type UpdateMetadataOptsBuilder interface {
ToSnapshotUpdateMetadataMap() (map[string]interface{}, error)
}
// UpdateMetadataOpts contain options for updating an existing Snapshot. This
// object is passed to the snapshots.Update function. For more information
// about the parameters, see the Snapshot object.
type UpdateMetadataOpts struct {
Metadata map[string]interface{} `json:"metadata,omitempty"`
}
// ToSnapshotUpdateMetadataMap assembles a request body based on the contents of
// an UpdateMetadataOpts.
func (opts UpdateMetadataOpts) ToSnapshotUpdateMetadataMap() (map[string]interface{}, error) {
return gophercloud.BuildRequestBody(opts, "")
}
// UpdateMetadata will update the Snapshot with provided information. To
// extract the updated Snapshot from the response, call the ExtractMetadata
// method on the UpdateMetadataResult.
func UpdateMetadata(client *gophercloud.ServiceClient, id string, opts UpdateMetadataOptsBuilder) (r UpdateMetadataResult) {
b, err := opts.ToSnapshotUpdateMetadataMap()
if err != nil {
r.Err = err
return
}
_, r.Err = client.Put(updateMetadataURL(client, id), b, &r.Body, &gophercloud.RequestOpts{
OkCodes: []int{200},
})
return
}
// IDFromName is a convienience function that returns a snapshot's ID given its name.
func IDFromName(client *gophercloud.ServiceClient, name string) (string, error) {
count := 0
id := ""
pages, err := List(client, nil).AllPages()
if err != nil {
return "", err
}
all, err := ExtractSnapshots(pages)
if err != nil {
return "", err
}
for _, s := range all {
if s.Name == name {
count++
id = s.ID
}
}
switch count {
case 0:
return "", gophercloud.ErrResourceNotFound{Name: name, ResourceType: "snapshot"}
case 1:
return id, nil
default:
return "", gophercloud.ErrMultipleResourcesFound{Name: name, Count: count, ResourceType: "snapshot"}
}
}