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Diffstat (limited to 'common/maps/maps.go')
-rw-r--r-- | common/maps/maps.go | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/common/maps/maps.go b/common/maps/maps.go new file mode 100644 index 000000000..a114b557c --- /dev/null +++ b/common/maps/maps.go @@ -0,0 +1,44 @@ +// Copyright 2018 The Hugo Authors. All rights reserved. +// +// 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 maps + +import ( + "strings" + + "github.com/spf13/cast" +) + +// ToLower makes all the keys in the given map lower cased and will do so +// recursively. +// Notes: +// * This will modify the map given. +// * Any nested map[interface{}]interface{} will be converted to map[string]interface{}. +func ToLower(m map[string]interface{}) { + for k, v := range m { + switch v.(type) { + case map[interface{}]interface{}: + v = cast.ToStringMap(v) + ToLower(v.(map[string]interface{})) + case map[string]interface{}: + ToLower(v.(map[string]interface{})) + } + + lKey := strings.ToLower(k) + if k != lKey { + delete(m, k) + m[lKey] = v + } + + } +} |