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package images
import (
"fmt"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/pagination"
)
// ListOptsBuilder allows extensions to add additional parameters to the
// List request.
type ListOptsBuilder interface {
ToImageListQuery() (string, error)
}
// ListOpts contain options for limiting the number of Images returned from a call to ListDetail.
type ListOpts struct {
// When the image last changed status (in date-time format).
ChangesSince string `q:"changes-since"`
// The number of Images to return.
Limit int `q:"limit"`
// UUID of the Image at which to set a marker.
Marker string `q:"marker"`
// The name of the Image.
Name string `q:"name"`
// The name of the Server (in URL format).
Server string `q:"server"`
// The current status of the Image.
Status string `q:"status"`
// The value of the type of image (e.g. BASE, SERVER, ALL)
Type string `q:"type"`
}
// ToImageListQuery formats a ListOpts into a query string.
func (opts ListOpts) ToImageListQuery() (string, error) {
q, err := gophercloud.BuildQueryString(opts)
if err != nil {
return "", err
}
return q.String(), nil
}
// ListDetail enumerates the available images.
func ListDetail(client *gophercloud.ServiceClient, opts ListOptsBuilder) pagination.Pager {
url := listDetailURL(client)
if opts != nil {
query, err := opts.ToImageListQuery()
if err != nil {
return pagination.Pager{Err: err}
}
url += query
}
createPage := func(r pagination.PageResult) pagination.Page {
return ImagePage{pagination.LinkedPageBase{PageResult: r}}
}
return pagination.NewPager(client, url, createPage)
}
// Get acquires additional detail about a specific image by ID.
// Use ExtractImage() to interpret the result as an openstack Image.
func Get(client *gophercloud.ServiceClient, id string) GetResult {
var result GetResult
_, result.Err = client.Get(getURL(client, id), &result.Body, nil)
return result
}
// Delete deletes the specified image ID.
func Delete(client *gophercloud.ServiceClient, id string) DeleteResult {
var result DeleteResult
_, result.Err = client.Delete(deleteURL(client, id), nil)
return result
}
// IDFromName is a convienience function that returns an image's ID given its name.
func IDFromName(client *gophercloud.ServiceClient, name string) (string, error) {
imageCount := 0
imageID := ""
if name == "" {
return "", fmt.Errorf("An image name must be provided.")
}
pager := ListDetail(client, &ListOpts{
Name: name,
})
pager.EachPage(func(page pagination.Page) (bool, error) {
imageList, err := ExtractImages(page)
if err != nil {
return false, err
}
for _, i := range imageList {
if i.Name == name {
imageCount++
imageID = i.ID
}
}
return true, nil
})
switch imageCount {
case 0:
return "", fmt.Errorf("Unable to find image: %s", name)
case 1:
return imageID, nil
default:
return "", fmt.Errorf("Found %d images matching %s", imageCount, name)
}
}
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