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// -*- Mode: Go; indent-tabs-mode: t -*-
/*
* Copyright (C) 2018 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 utils
import (
"encoding/json"
)
// NormalizeInterfaceAttributes normalises types of an attribute values.
// The following transformations are applied: int -> int64, float32 -> float64.
// The normalisation proceeds recursively through maps and slices.
func NormalizeInterfaceAttributes(value any) any {
// Normalize ints/floats using their 64-bit variants.
switch v := value.(type) {
case int:
return int64(v)
case float32:
return float64(v)
case []any:
vc := make([]any, len(v))
for i, el := range v {
vc[i] = NormalizeInterfaceAttributes(el)
}
return vc
case map[string]any:
vc := make(map[string]any, len(v))
for key, item := range v {
vc[key] = NormalizeInterfaceAttributes(item)
}
return vc
case json.Number:
jsonval := value.(json.Number)
if asInt, err := jsonval.Int64(); err == nil {
return asInt
}
asFloat, _ := jsonval.Float64()
return asFloat
}
return value
}
// CopyAttributes makes a deep copy of the attributes map.
func CopyAttributes(value map[string]any) map[string]any {
return copyRecursive(value).(map[string]any)
}
func copyRecursive(value any) any {
// note: ensure all the mutable types (or types that need a conversion)
// are handled here.
switch v := value.(type) {
case []any:
arr := make([]any, len(v))
for i, el := range v {
arr[i] = copyRecursive(el)
}
return arr
case map[string]any:
mp := make(map[string]any, len(v))
for key, item := range v {
mp[key] = copyRecursive(item)
}
return mp
}
return value
}
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