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variations_helper.go
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variations_helper.go
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package launchdarkly
import (
"encoding/json"
"fmt"
"reflect"
"strconv"
"strings"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/schema"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/structure"
"github.com/hashicorp/terraform-plugin-sdk/v2/helper/validation"
ldapi "github.com/launchdarkly/api-client-go/v7"
)
const (
BOOL_VARIATION = "boolean"
STRING_VARIATION = "string"
NUMBER_VARIATION = "number"
JSON_VARIATION = "json"
)
func variationTypeSchema() *schema.Schema {
return &schema.Schema{
Type: schema.TypeString,
Required: true,
ForceNew: true,
Description: fmt.Sprintf("The uniform type for all variations. Can be either %q, %q, %q, or %q.",
BOOL_VARIATION, STRING_VARIATION, NUMBER_VARIATION, JSON_VARIATION),
ValidateDiagFunc: validation.ToDiagFunc(validateVariationType),
}
}
func variationsSchema() *schema.Schema {
return &schema.Schema{
Type: schema.TypeList,
Optional: true,
Computed: true,
Description: "An array of possible variations for the flag",
MinItems: 2,
Elem: &schema.Resource{
Schema: map[string]*schema.Schema{
NAME: {
Type: schema.TypeString,
Optional: true,
Description: "A name for the variation",
},
DESCRIPTION: {
Type: schema.TypeString,
Optional: true,
Description: "A description for the variation",
},
VALUE: {
Type: schema.TypeString,
Required: true,
Description: "The value of the flag for this variation",
ValidateDiagFunc: validation.ToDiagFunc(validateVariationValue),
StateFunc: func(i interface{}) string {
// All values are stored as strings in TF state
v, err := structure.NormalizeJsonString(i)
if err != nil {
return fmt.Sprintf("%v", i)
}
return v
},
},
},
},
}
}
func validateVariationType(val interface{}, key string) (warns []string, errs []error) {
value := val.(string)
switch value {
case BOOL_VARIATION, STRING_VARIATION, NUMBER_VARIATION, JSON_VARIATION:
break
default:
errs = append(errs, fmt.Errorf("%q contains an invalid value %q. Valid values are `boolean`, `string`, `number`, and `json`", key, value))
}
return warns, errs
}
func validateVariationValue(val interface{}, key string) (warns []string, errs []error) {
value := strings.TrimSpace(val.(string))
if strings.HasPrefix(value, "{") {
if !json.Valid([]byte(value)) {
warns = append(warns, fmt.Sprintf("%q starts with a '{' but is not valid JSON. received: %q", key, value))
}
}
return warns, errs
}
func variationPatchesFromResourceData(d *schema.ResourceData) ([]ldapi.PatchOperation, error) {
var patches []ldapi.PatchOperation
variationType := d.Get(VARIATION_TYPE).(string)
old, new := d.GetChange(VARIATIONS)
if len(old.([]interface{})) == 0 {
// This can only happen when the resource is first created. Since this is handled in the creation POST,
// variation patches are not necessary.
return patches, nil
}
oldVariations, err := variationsFromSchemaData(old, variationType)
if err != nil {
return patches, err
}
newVariations, err := variationsFromSchemaData(new, variationType)
if err != nil {
return patches, err
}
// remove any unnecessary variations from the end of the variation slice
for idx := len(newVariations); idx < len(oldVariations); idx++ {
patches = append(patches, patchRemove(fmt.Sprintf("/variations/%d", idx)))
}
for idx, variation := range newVariations {
if idx < len(oldVariations) {
patches = append(patches, patchReplace(fmt.Sprintf("/variations/%d/value", idx), variation.Value))
patches = append(patches, patchReplace(fmt.Sprintf("/variations/%d/name", idx), variation.Name))
patches = append(patches, patchReplace(fmt.Sprintf("/variations/%d/description", idx), variation.Description))
} else {
patches = append(patches, patchAdd(fmt.Sprintf("/variations/%d", idx), variation))
}
}
return patches, nil
}
func variationsFromSchemaData(schemaVariations interface{}, variationType string) ([]ldapi.Variation, error) {
list := schemaVariations.([]interface{})
variations := make([]ldapi.Variation, len(list))
if variationType != BOOL_VARIATION && len(list) < 2 {
return variations, fmt.Errorf("multivariate flags must have at least two variations defined")
}
var err error
for i, variation := range list {
switch variationType {
case BOOL_VARIATION:
variations[i] = boolVariationFromResourceData(variation)
case STRING_VARIATION:
variations[i] = stringVariationFromResourceData(variation)
case NUMBER_VARIATION:
variations[i], err = numberVariationFromResourceData(variation)
case JSON_VARIATION:
variations[i], err = jsonVariationFromResourceData(variation)
default:
return variations, fmt.Errorf("invalid variation type: %q", variationType)
}
if err != nil {
return variations, err
}
}
return variations, nil
}
func variationsFromResourceData(d *schema.ResourceData) ([]ldapi.Variation, error) {
schemaVariations := d.Get(VARIATIONS)
variationType := d.Get(VARIATION_TYPE).(string)
variations, err := variationsFromSchemaData(schemaVariations, variationType)
if err != nil {
return variations, err
}
return variations, nil
}
func boolVariationFromResourceData(variation interface{}) ldapi.Variation {
variationMap := variation.(map[string]interface{})
v := variationMap[VALUE].(string) == "true"
transformed := ldapi.Variation{
Value: ptr(v),
}
name := variationMap[NAME].(string)
if name != "" {
transformed.Name = &name
}
description := variationMap[DESCRIPTION].(string)
if description != "" {
transformed.Description = &description
}
return transformed
}
func stringVariationFromResourceData(variation interface{}) ldapi.Variation {
var transformed ldapi.Variation
if variation == nil { // handle empty string value
transformed.Value = strPtr("")
return transformed
}
variationMap := variation.(map[string]interface{})
v := variationMap[VALUE]
transformed.Value = &v
name := variationMap[NAME].(string)
if name != "" {
transformed.Name = &name
}
description := variationMap[DESCRIPTION].(string)
if description != "" {
transformed.Description = &description
}
return transformed
}
func numberVariationFromResourceData(variation interface{}) (ldapi.Variation, error) {
variationMap := variation.(map[string]interface{})
stringValue := variationMap[VALUE].(string)
v, err := strconv.ParseFloat(stringValue, 64)
if err != nil {
return ldapi.Variation{}, fmt.Errorf("%q is an invalid number variation value. %v", stringValue, err)
}
transformed := ldapi.Variation{Value: ptr(v)}
name := variationMap[NAME].(string)
if name != "" {
transformed.Name = &name
}
description := variationMap[DESCRIPTION].(string)
if description != "" {
transformed.Description = &description
}
return transformed, nil
}
func jsonVariationFromResourceData(variation interface{}) (ldapi.Variation, error) {
variationMap := variation.(map[string]interface{})
stringValue := variationMap[VALUE].(string)
var v interface{}
err := json.Unmarshal([]byte(stringValue), &v)
if err != nil {
return ldapi.Variation{}, fmt.Errorf("%q is an invalid json variation value. %v", stringValue, err)
}
transformed := ldapi.Variation{Value: ptr(v)}
name := variationMap[NAME].(string)
if name != "" {
transformed.Name = &name
}
description := variationMap[DESCRIPTION].(string)
if description != "" {
transformed.Description = &description
}
return transformed, nil
}
func stringifyValue(value interface{}) string {
var str string
switch v := (value).(type) {
case int:
str = strconv.Itoa(v)
case float64:
str = strconv.FormatFloat(v, 'f', -1, 64)
case bool:
str = strconv.FormatBool(v)
case string:
str = v
}
return str
}
func variationValueToString(value *interface{}, variationType string) (string, error) {
if variationType != JSON_VARIATION {
return stringifyValue(*value), nil
}
byteVal, err := json.Marshal(*value)
if err != nil {
return "", fmt.Errorf("unable to marshal json variation value: %v", err)
}
ret, err := structure.NormalizeJsonString(string(byteVal))
if err != nil {
return "", fmt.Errorf("unable to normalize json variation value: %v", err)
}
return ret, nil
}
func variationsToResourceData(variations []ldapi.Variation, variationType string) (interface{}, error) {
transformed := make([]interface{}, 0, len(variations))
for _, variation := range variations {
v, err := variationValueToString(&variation.Value, variationType)
if err != nil {
return nil, err
}
transformed = append(transformed, map[string]interface{}{
NAME: variation.Name,
DESCRIPTION: variation.Description,
VALUE: v,
})
}
return transformed, nil
}
func variationsToVariationType(variations []ldapi.Variation) (string, error) {
// since all variations have a uniform type, checking the first variation is sufficient
variationValue := variations[0].Value
if variationValue == nil {
return "", fmt.Errorf("nil variation value: %v", variationValue)
}
var variationType string
switch variationValue.(type) {
case bool:
variationType = BOOL_VARIATION
case string:
variationType = STRING_VARIATION
case float64:
variationType = NUMBER_VARIATION
case map[string]interface{}, []interface{}:
variationType = JSON_VARIATION
default:
return "", fmt.Errorf("unknown variation type: %q", reflect.TypeOf(variationValue))
}
return variationType, nil
}