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utils.go
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/
utils.go
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package common
// ReadValue returns the source object item located at the requested path.
// nolint:gocyclo
func ReadValue(source interface{}, path map[string]interface{}) interface{} {
var result interface{}
for k, v := range path {
switch value := v.(type) {
case float64, bool, string:
sourceMap, ok := source.(map[string]interface{})
if !ok {
break
}
result = sourceMap[k]
case []interface{}:
if k != "" {
// array is inside the object
// {"foo":[{},{},{}]}
sourceMap, ok := source.(map[string]interface{})
if !ok {
break
}
source, ok = sourceMap[k]
if !ok {
break
}
}
// array is a root object
// [{},{},{}]
sourceArr, ok := source.([]interface{})
if !ok {
break
}
index := len(value) - 1
if index >= len(sourceArr) {
break
}
result = ReadValue(sourceArr[index], value[index].(map[string]interface{}))
case map[string]interface{}:
if k == "" {
result = source
break
}
sourceMap, ok := source.(map[string]interface{})
if !ok {
break
}
if _, ok := sourceMap[k]; !ok {
break
}
result = ReadValue(sourceMap[k], value)
}
}
return result
}