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package images
import (
"github.com/mitchellh/mapstructure"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/pagination"
)
// GetResult temporarily stores a Get response.
type GetResult struct {
gophercloud.Result
}
// DeleteResult represents the result of an image.Delete operation.
type DeleteResult struct {
gophercloud.ErrResult
}
// Extract interprets a GetResult as an Image.
func (gr GetResult) Extract() (*Image, error) {
if gr.Err != nil {
return nil, gr.Err
}
var decoded struct {
Image Image `mapstructure:"image"`
}
err := mapstructure.Decode(gr.Body, &decoded)
return &decoded.Image, err
}
// Image is used for JSON (un)marshalling.
// It provides a description of an OS image.
type Image struct {
// ID contains the image's unique identifier.
ID string
Created string
// MinDisk and MinRAM specify the minimum resources a server must provide to be able to install the image.
MinDisk int
MinRAM int
// Name provides a human-readable moniker for the OS image.
Name string
// The Progress and Status fields indicate image-creation status.
// Any usable image will have 100% progress.
Progress int
Status string
Updated string
Metadata map[string]string
}
// ImagePage contains a single page of results from a List operation.
// Use ExtractImages to convert it into a slice of usable structs.
type ImagePage struct {
pagination.LinkedPageBase
}
// IsEmpty returns true if a page contains no Image results.
func (page ImagePage) IsEmpty() (bool, error) {
images, err := ExtractImages(page)
if err != nil {
return true, err
}
return len(images) == 0, nil
}
// NextPageURL uses the response's embedded link reference to navigate to the next page of results.
func (page ImagePage) NextPageURL() (string, error) {
type resp struct {
Links []gophercloud.Link `mapstructure:"images_links"`
}
var r resp
err := mapstructure.Decode(page.Body, &r)
if err != nil {
return "", err
}
return gophercloud.ExtractNextURL(r.Links)
}
// ExtractImages converts a page of List results into a slice of usable Image structs.
func ExtractImages(page pagination.Page) ([]Image, error) {
casted := page.(ImagePage).Body
var results struct {
Images []Image `mapstructure:"images"`
}
err := mapstructure.Decode(casted, &results)
return results.Images, err
}
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