1 files changed, 71 insertions, 0 deletions
diff --git a/vendor/github.com/hashicorp/terraform/flatmap/flatten.go b/vendor/github.com/hashicorp/terraform/flatmap/flatten.go
new file mode 100644
index 00000000..9ff6e426
--- /dev/null
+++ b/vendor/github.com/hashicorp/terraform/flatmap/flatten.go
@@ -0,0 +1,71 @@
+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))
+	}
+}