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27 lines
701 B
Go
27 lines
701 B
Go
package utils
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import (
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"fmt"
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"reflect"
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"github.com/osteele/liquid"
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)
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// FollowDots applied to a property list ["a", "b", "c"] is equivalent to
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// the Liquid data expression "data.a.b.c", except without special treatment
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// of "first", "last", and "size".
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func FollowDots(data interface{}, props []string) (interface{}, error) {
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for _, name := range props {
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data = liquid.FromDrop(data)
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if reflect.TypeOf(data).Kind() == reflect.Map {
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item := reflect.ValueOf(data).MapIndex(reflect.ValueOf(name))
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if item.IsValid() && !item.IsNil() && item.CanInterface() {
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data = item.Interface()
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continue
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}
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}
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return nil, fmt.Errorf("no such property: %q", name)
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}
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return data, nil
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}
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