61 lines
1.6 KiB
Go
61 lines
1.6 KiB
Go
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package manifest
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import (
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"bytes"
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"encoding/json"
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)
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// Argument is a special struct that was made to handle a mixed-typed array
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// of arguments in a manifest.
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//
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// An argument in a manifest could be:
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// - a single string
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// - an object consists of rules array field and a value field that could be
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// a single string or an array of strings.
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type Argument struct {
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Rules []Rule `json:"rules"`
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Value []string `json:"value"`
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}
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// CheckRules returns true if all rules passed and a feature set in a rule if
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// applicable, a FeatureUnknown otherwise.
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func (a Argument) CheckRules() (ok bool, feature Feature) {
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feature = FeatureUnknown
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for _, r := range a.Rules {
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ok, feature = r.Check()
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if !ok {
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return false, feature
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}
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}
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return true, feature
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}
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// UnmarshalJSON had to be implemented because of mixed-typed nature of an
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// arguments array in a manifest.
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func (a *Argument) UnmarshalJSON(data []byte) error {
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if data[0] == '"' {
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a.Value = append(a.Value, string(data[1:len(data)-1]))
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} else if data[0] == '{' && bytes.Contains(data, []byte("value\": \"")) {
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singleValArg := struct {
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Rules []Rule `json:"rules"`
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Value string `json:"value"`
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}{}
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if err := json.Unmarshal(data, &singleValArg); err != nil {
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return err
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}
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a.Rules = singleValArg.Rules
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a.Value = append(a.Value, singleValArg.Value)
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} else if data[0] == '{' {
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multiValArg := struct {
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Rules []Rule `json:"rules"`
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Value []string `json:"value"`
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}{}
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if err := json.Unmarshal(data, &multiValArg); err != nil {
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return err
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}
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a.Rules = multiValArg.Rules
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a.Value = multiValArg.Value
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}
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return nil
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}
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