andrey
01d707ccbf
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50 lines
948 B
Go
50 lines
948 B
Go
package key
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import (
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"context"
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"fmt"
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"gitoa.ru/go-4devs/config"
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"gitoa.ru/go-4devs/config/param"
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"gitoa.ru/go-4devs/config/value"
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)
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type pkey int
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const paramKey pkey = iota
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func WithKey(in string) param.Option {
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return func(p param.Params) param.Params {
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return param.With(p, paramKey, in)
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}
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}
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func Key(_ context.Context, in config.Value, opts ...param.Option) (config.Value, error) {
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data := make(map[string]any, 0)
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if err := in.Unmarshal(&data); err != nil {
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return nil, fmt.Errorf("unmarshal:%w", err)
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}
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key, ok := getKey(opts...)
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if !ok {
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return nil, fmt.Errorf("key is %w", config.ErrRequired)
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}
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val, vok := data[key]
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if !vok {
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return nil, fmt.Errorf("value by key[%v]: %w", key, config.ErrNotFound)
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}
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return value.New(val), nil
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}
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func getKey(opts ...param.Option) (string, bool) {
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params := param.New(opts...)
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if name, ok := param.String(params, paramKey); ok {
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return name, ok
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}
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return "", false
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}
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