mirror of
https://github.com/letic/terraform-provider-google.git
synced 2024-09-07 01:26:43 +00:00
72 lines
1.7 KiB
Go
72 lines
1.7 KiB
Go
package flatmap
|
|
|
|
import (
|
|
"fmt"
|
|
"reflect"
|
|
)
|
|
|
|
// Flatten takes a structure and turns into a flat map[string]string.
|
|
//
|
|
// Within the "thing" parameter, only primitive values are allowed. Structs are
|
|
// not supported. Therefore, it can only be slices, maps, primitives, and
|
|
// any combination of those together.
|
|
//
|
|
// See the tests for examples of what inputs are turned into.
|
|
func Flatten(thing map[string]interface{}) Map {
|
|
result := make(map[string]string)
|
|
|
|
for k, raw := range thing {
|
|
flatten(result, k, reflect.ValueOf(raw))
|
|
}
|
|
|
|
return Map(result)
|
|
}
|
|
|
|
func flatten(result map[string]string, prefix string, v reflect.Value) {
|
|
if v.Kind() == reflect.Interface {
|
|
v = v.Elem()
|
|
}
|
|
|
|
switch v.Kind() {
|
|
case reflect.Bool:
|
|
if v.Bool() {
|
|
result[prefix] = "true"
|
|
} else {
|
|
result[prefix] = "false"
|
|
}
|
|
case reflect.Int:
|
|
result[prefix] = fmt.Sprintf("%d", v.Int())
|
|
case reflect.Map:
|
|
flattenMap(result, prefix, v)
|
|
case reflect.Slice:
|
|
flattenSlice(result, prefix, v)
|
|
case reflect.String:
|
|
result[prefix] = v.String()
|
|
default:
|
|
panic(fmt.Sprintf("Unknown: %s", v))
|
|
}
|
|
}
|
|
|
|
func flattenMap(result map[string]string, prefix string, v reflect.Value) {
|
|
for _, k := range v.MapKeys() {
|
|
if k.Kind() == reflect.Interface {
|
|
k = k.Elem()
|
|
}
|
|
|
|
if k.Kind() != reflect.String {
|
|
panic(fmt.Sprintf("%s: map key is not string: %s", prefix, k))
|
|
}
|
|
|
|
flatten(result, fmt.Sprintf("%s.%s", prefix, k.String()), v.MapIndex(k))
|
|
}
|
|
}
|
|
|
|
func flattenSlice(result map[string]string, prefix string, v reflect.Value) {
|
|
prefix = prefix + "."
|
|
|
|
result[prefix+"#"] = fmt.Sprintf("%d", v.Len())
|
|
for i := 0; i < v.Len(); i++ {
|
|
flatten(result, fmt.Sprintf("%s%d", prefix, i), v.Index(i))
|
|
}
|
|
}
|