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53 lines
1.0 KiB
53 lines
1.0 KiB
1 year ago
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package v
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type Matcher struct {
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field string
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label string
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value any
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branches []branch
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fallback func(valuer *Valuer) error
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compare func(a, b any) bool
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}
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type branch struct {
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value any
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handle func(valuer *Valuer) error
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}
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func Match(value any, field, label string) *Matcher {
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return &Matcher{
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field: field,
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label: label,
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value: value,
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branches: []branch{},
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fallback: nil,
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compare: func(a, b any) bool { return a == b },
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}
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}
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func (m *Matcher) Branch(value any, handle func(valuer *Valuer) error) *Matcher {
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m.branches = append(m.branches, branch{value: value, handle: handle})
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return m
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}
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func (m *Matcher) Fallback(handle func(valuer *Valuer) error) *Matcher {
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m.fallback = handle
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return m
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}
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func (m *Matcher) Validate() error {
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for _, b := range m.branches {
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if m.compare(m.value, b.value) {
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valuer := Value(m.value, m.field, m.label)
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return b.handle(valuer)
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}
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}
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if m.fallback != nil {
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valuer := Value(m.value, m.field, m.label)
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return m.fallback(valuer)
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}
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return nil
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}
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