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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2016 Canonical Ltd
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 3 as
* published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
// Package metautil takes care of basic details of working with snap metadata formats.
package metautil
import (
"fmt"
)
// NormalizeValue validates values and returns a normalized version of it
// (map[any]any is turned into map[string]any)
func NormalizeValue(v any) (any, error) {
switch x := v.(type) {
case string:
return x, nil
case bool:
return x, nil
case int:
return int64(x), nil
case int64:
return x, nil
case float64:
return x, nil
case float32:
return float64(x), nil
case []any:
l := make([]any, len(x))
for i, el := range x {
el, err := NormalizeValue(el)
if err != nil {
return nil, err
}
l[i] = el
}
return l, nil
case map[any]any:
m := make(map[string]any, len(x))
for k, item := range x {
kStr, ok := k.(string)
if !ok {
return nil, fmt.Errorf("non-string key: %v", k)
}
item, err := NormalizeValue(item)
if err != nil {
return nil, err
}
m[kStr] = item
}
return m, nil
case map[string]any:
m := make(map[string]any, len(x))
for k, item := range x {
item, err := NormalizeValue(item)
if err != nil {
return nil, err
}
m[k] = item
}
return m, nil
default:
return nil, fmt.Errorf("invalid scalar: %v", v)
}
}
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