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package extensions
import (
"github.com/mitchellh/mapstructure"
"github.com/rackspace/gophercloud"
common "github.com/rackspace/gophercloud/openstack/common/extensions"
"github.com/rackspace/gophercloud/pagination"
)
// ExtensionPage is a single page of Extension results.
type ExtensionPage struct {
common.ExtensionPage
}
// IsEmpty returns true if the current page contains at least one Extension.
func (page ExtensionPage) IsEmpty() (bool, error) {
is, err := ExtractExtensions(page)
if err != nil {
return true, err
}
return len(is) == 0, nil
}
// ExtractExtensions accepts a Page struct, specifically an ExtensionPage struct, and extracts the
// elements into a slice of Extension structs.
func ExtractExtensions(page pagination.Page) ([]common.Extension, error) {
// Identity v2 adds an intermediate "values" object.
var resp struct {
Extensions struct {
Values []common.Extension `mapstructure:"values"`
} `mapstructure:"extensions"`
}
err := mapstructure.Decode(page.(ExtensionPage).Body, &resp)
return resp.Extensions.Values, err
}
// Get retrieves information for a specific extension using its alias.
func Get(c *gophercloud.ServiceClient, alias string) common.GetResult {
return common.Get(c, alias)
}
// List returns a Pager which allows you to iterate over the full collection of extensions.
// It does not accept query parameters.
func List(c *gophercloud.ServiceClient) pagination.Pager {
return common.List(c).WithPageCreator(func(r pagination.PageResult) pagination.Page {
return ExtensionPage{
ExtensionPage: common.ExtensionPage{SinglePageBase: pagination.SinglePageBase(r)},
}
})
}
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