// Copyright 2022 The Matrix.org Foundation C.I.C.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package mapsutil

// Union two maps together with "b" overriding the values of "a"
// if the keys collide.
func MapsUnion(a map[string]interface{}, b map[string]interface{}) map[string]interface{} {
	c := make(map[string]interface{})
	for k, v := range a {
		c[k] = v
	}
	for k, v := range b {
		c[k] = v
	}

	return c
}

// Make a copy of the map
func MapCopy(m map[string]interface{}) map[string]interface{} {
	cp := make(map[string]interface{})
	for k, v := range m {
		vm, ok := v.(map[string]interface{})
		if ok {
			cp[k] = MapCopy(vm)
		} else {
			cp[k] = v
		}
	}

	return cp
}
