55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
package templates
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import (
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"reflect"
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"strings"
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)
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// https://github.com/peterbourgon/mergemap
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const mergeMaxDepth = 100
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var matchKey = strings.EqualFold
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// mergeMaps recursively merges other into target using matchKey for key comparison
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func mergeMaps(other map[string]any, target map[string]any) error {
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// return mergo.Map(&target, other, mergo.WithOverride)
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// return util.DecodeOther(other, target)
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merge(target, other, 0)
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return nil
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}
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func merge(dst, src map[string]any, depth int) map[string]any {
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if depth > mergeMaxDepth {
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panic("too deep!")
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}
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for key, srcVal := range src {
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for k := range dst {
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if matchKey(k, key) {
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// overwrite key
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key = k
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srcMap, srcMapOk := mapify(srcVal)
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dstMap, dstMapOk := mapify(dst[k])
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if srcMapOk && dstMapOk {
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srcVal = merge(dstMap, srcMap, depth+1)
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}
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break
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}
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}
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dst[key] = srcVal
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}
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return dst
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}
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func mapify(i any) (map[string]any, bool) {
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value := reflect.ValueOf(i)
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if value.Kind() == reflect.Map {
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m := map[string]any{}
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for _, k := range value.MapKeys() {
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m[k.String()] = value.MapIndex(k).Interface()
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}
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return m, true
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}
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return map[string]any{}, false
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}
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