david
ca2533d4df
Replace generic string types with strongly-typed value objects throughout the application layer. This change ensures compile-time type checking and automatic validation during JSON deserialization. Changes: - Add JSON marshaling/unmarshaling to HabitType and Frequency value objects - Update all DTOs to use typed fields instead of strings - Update commands and queries to use proper types - Remove unnecessary string conversions - Add comprehensive JSON serialization tests - Fix existing tests to work with typed fields Benefits: - Type safety: compiler catches invalid usage - Automatic validation: invalid values rejected during JSON parsing - Better code documentation and self-explanatory APIs - Reduced runtime errors
41 lines
711 B
Go
41 lines
711 B
Go
package value_objects
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import (
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"encoding/json"
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"fmt"
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)
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type Frequency string
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const (
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FrequencyDaily Frequency = "DAILY"
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FrequencyWeekly Frequency = "WEEKLY"
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FrequencyMonthly Frequency = "MONTHLY"
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)
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func (f Frequency) IsValid() bool {
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switch f {
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case FrequencyDaily, FrequencyWeekly, FrequencyMonthly:
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return true
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}
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return false
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}
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func (f Frequency) MarshalJSON() ([]byte, error) {
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return json.Marshal(string(f))
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}
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func (f *Frequency) UnmarshalJSON(data []byte) error {
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var s string
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if err := json.Unmarshal(data, &s); err != nil {
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return err
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}
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*f = Frequency(s)
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if !f.IsValid() {
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return fmt.Errorf("invalid frequency: %s (must be DAILY, WEEKLY, or MONTHLY)", s)
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}
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return nil
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}
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