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package datastores
import (
"github.com/mitchellh/mapstructure"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/pagination"
)
// Version represents a version API resource. Multiple versions belong to a Datastore.
type Version struct {
ID string
Links []gophercloud.Link
Name string
}
// Datastore represents a Datastore API resource.
type Datastore struct {
DefaultVersion string `json:"default_version" mapstructure:"default_version"`
ID string
Links []gophercloud.Link
Name string
Versions []Version
}
// DatastorePartial is a meta structure which is used in various API responses.
// It is a lightweight and truncated version of a full Datastore resource,
// offering details of the Version, Type and VersionID only.
type DatastorePartial struct {
Version string
Type string
VersionID string `json:"version_id" mapstructure:"version_id"`
}
// GetResult represents the result of a Get operation.
type GetResult struct {
gophercloud.Result
}
// GetVersionResult represents the result of getting a version.
type GetVersionResult struct {
gophercloud.Result
}
// DatastorePage represents a page of datastore resources.
type DatastorePage struct {
pagination.SinglePageBase
}
// IsEmpty indicates whether a Datastore collection is empty.
func (r DatastorePage) IsEmpty() (bool, error) {
is, err := ExtractDatastores(r)
if err != nil {
return true, err
}
return len(is) == 0, nil
}
// ExtractDatastores retrieves a slice of datastore structs from a paginated
// collection.
func ExtractDatastores(page pagination.Page) ([]Datastore, error) {
casted := page.(DatastorePage).Body
var resp struct {
Datastores []Datastore `mapstructure:"datastores" json:"datastores"`
}
err := mapstructure.Decode(casted, &resp)
return resp.Datastores, err
}
// Extract retrieves a single Datastore struct from an operation result.
func (r GetResult) Extract() (*Datastore, error) {
if r.Err != nil {
return nil, r.Err
}
var response struct {
Datastore Datastore `mapstructure:"datastore"`
}
err := mapstructure.Decode(r.Body, &response)
return &response.Datastore, err
}
// DatastorePage represents a page of version resources.
type VersionPage struct {
pagination.SinglePageBase
}
// IsEmpty indicates whether a collection of version resources is empty.
func (r VersionPage) IsEmpty() (bool, error) {
is, err := ExtractVersions(r)
if err != nil {
return true, err
}
return len(is) == 0, nil
}
// ExtractVersions retrieves a slice of versions from a paginated collection.
func ExtractVersions(page pagination.Page) ([]Version, error) {
casted := page.(VersionPage).Body
var resp struct {
Versions []Version `mapstructure:"versions" json:"versions"`
}
err := mapstructure.Decode(casted, &resp)
return resp.Versions, err
}
// Extract retrieves a single Version struct from an operation result.
func (r GetVersionResult) Extract() (*Version, error) {
if r.Err != nil {
return nil, r.Err
}
var response struct {
Version Version `mapstructure:"version"`
}
err := mapstructure.Decode(r.Body, &response)
return &response.Version, err
}
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