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results.go
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results.go
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package stackresources
import (
"encoding/json"
"fmt"
"reflect"
"time"
"github.com/mitchellh/mapstructure"
"github.com/rackspace/gophercloud"
"github.com/rackspace/gophercloud/pagination"
)
// Resource represents a stack resource.
type Resource struct {
Attributes map[string]interface{} `mapstructure:"attributes"`
CreationTime time.Time `mapstructure:"-"`
Description string `mapstructure:"description"`
Links []gophercloud.Link `mapstructure:"links"`
LogicalID string `mapstructure:"logical_resource_id"`
Name string `mapstructure:"resource_name"`
PhysicalID string `mapstructure:"physical_resource_id"`
RequiredBy []interface{} `mapstructure:"required_by"`
Status string `mapstructure:"resource_status"`
StatusReason string `mapstructure:"resource_status_reason"`
Type string `mapstructure:"resource_type"`
UpdatedTime time.Time `mapstructure:"-"`
}
// FindResult represents the result of a Find operation.
type FindResult struct {
gophercloud.Result
}
// Extract returns a slice of Resource objects and is called after a
// Find operation.
func (r FindResult) Extract() ([]Resource, error) {
if r.Err != nil {
return nil, r.Err
}
var res struct {
Res []Resource `mapstructure:"resources"`
}
if err := mapstructure.Decode(r.Body, &res); err != nil {
return nil, err
}
resources := r.Body.(map[string]interface{})["resources"].([]interface{})
for i, resourceRaw := range resources {
resource := resourceRaw.(map[string]interface{})
if date, ok := resource["updated_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
res.Res[i].UpdatedTime = t
}
if date, ok := resource["creation_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
res.Res[i].CreationTime = t
}
}
return res.Res, nil
}
// ResourcePage abstracts the raw results of making a List() request against the API.
// As OpenStack extensions may freely alter the response bodies of structures returned to the client, you may only safely access the
// data provided through the ExtractResources call.
type ResourcePage struct {
pagination.SinglePageBase
}
// IsEmpty returns true if a page contains no Server results.
func (r ResourcePage) IsEmpty() (bool, error) {
resources, err := ExtractResources(r)
if err != nil {
return true, err
}
return len(resources) == 0, nil
}
// ExtractResources interprets the results of a single page from a List() call, producing a slice of Resource entities.
func ExtractResources(page pagination.Page) ([]Resource, error) {
casted := page.(ResourcePage).Body
var response struct {
Resources []Resource `mapstructure:"resources"`
}
if err := mapstructure.Decode(casted, &response); err != nil {
return nil, err
}
var resources []interface{}
switch casted.(type) {
case map[string]interface{}:
resources = casted.(map[string]interface{})["resources"].([]interface{})
case map[string][]interface{}:
resources = casted.(map[string][]interface{})["resources"]
default:
return response.Resources, fmt.Errorf("Unknown type: %v", reflect.TypeOf(casted))
}
for i, resourceRaw := range resources {
resource := resourceRaw.(map[string]interface{})
if date, ok := resource["updated_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
response.Resources[i].UpdatedTime = t
}
if date, ok := resource["creation_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
response.Resources[i].CreationTime = t
}
}
return response.Resources, nil
}
// GetResult represents the result of a Get operation.
type GetResult struct {
gophercloud.Result
}
// Extract returns a pointer to a Resource object and is called after a
// Get operation.
func (r GetResult) Extract() (*Resource, error) {
if r.Err != nil {
return nil, r.Err
}
var res struct {
Res *Resource `mapstructure:"resource"`
}
if err := mapstructure.Decode(r.Body, &res); err != nil {
return nil, err
}
resource := r.Body.(map[string]interface{})["resource"].(map[string]interface{})
if date, ok := resource["updated_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
res.Res.UpdatedTime = t
}
if date, ok := resource["creation_time"]; ok && date != nil {
t, err := time.Parse(gophercloud.STACK_TIME_FMT, date.(string))
if err != nil {
return nil, err
}
res.Res.CreationTime = t
}
return res.Res, nil
}
// MetadataResult represents the result of a Metadata operation.
type MetadataResult struct {
gophercloud.Result
}
// Extract returns a map object and is called after a
// Metadata operation.
func (r MetadataResult) Extract() (map[string]string, error) {
if r.Err != nil {
return nil, r.Err
}
var res struct {
Meta map[string]string `mapstructure:"metadata"`
}
if err := mapstructure.Decode(r.Body, &res); err != nil {
return nil, err
}
return res.Meta, nil
}
// ResourceTypePage abstracts the raw results of making a ListTypes() request against the API.
// As OpenStack extensions may freely alter the response bodies of structures returned to the client, you may only safely access the
// data provided through the ExtractResourceTypes call.
type ResourceTypePage struct {
pagination.SinglePageBase
}
// IsEmpty returns true if a ResourceTypePage contains no resource types.
func (r ResourceTypePage) IsEmpty() (bool, error) {
rts, err := ExtractResourceTypes(r)
if err != nil {
return true, err
}
return len(rts) == 0, nil
}
// ResourceTypes represents the type that holds the result of ExtractResourceTypes.
// We define methods on this type to sort it before output
type ResourceTypes []string
func (r ResourceTypes) Len() int {
return len(r)
}
func (r ResourceTypes) Swap(i, j int) {
r[i], r[j] = r[j], r[i]
}
func (r ResourceTypes) Less(i, j int) bool {
return r[i] < r[j]
}
// ExtractResourceTypes extracts and returns resource types.
func ExtractResourceTypes(page pagination.Page) (ResourceTypes, error) {
casted := page.(ResourceTypePage).Body
var response struct {
ResourceTypes ResourceTypes `mapstructure:"resource_types"`
}
if err := mapstructure.Decode(casted, &response); err != nil {
return nil, err
}
return response.ResourceTypes, nil
}
// TypeSchema represents a stack resource schema.
type TypeSchema struct {
Attributes map[string]interface{} `mapstructure:"attributes"`
Properties map[string]interface{} `mapstrucutre:"properties"`
ResourceType string `mapstructure:"resource_type"`
SupportStatus map[string]interface{} `mapstructure:"support_status"`
}
// SchemaResult represents the result of a Schema operation.
type SchemaResult struct {
gophercloud.Result
}
// Extract returns a pointer to a TypeSchema object and is called after a
// Schema operation.
func (r SchemaResult) Extract() (*TypeSchema, error) {
if r.Err != nil {
return nil, r.Err
}
var res TypeSchema
if err := mapstructure.Decode(r.Body, &res); err != nil {
return nil, err
}
return &res, nil
}
// TemplateResult represents the result of a Template operation.
type TemplateResult struct {
gophercloud.Result
}
// Extract returns the template and is called after a
// Template operation.
func (r TemplateResult) Extract() ([]byte, error) {
if r.Err != nil {
return nil, r.Err
}
template, err := json.MarshalIndent(r.Body, "", " ")
if err != nil {
return nil, err
}
return template, nil
}