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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,61 @@ | ||
| package enums | ||
|
|
||
| import "fmt" | ||
|
|
||
| // CountiesOfCountry defines the counties of a country | ||
| type CountiesOfCountry struct { | ||
| Country CountryType | ||
| Counties []CountyType | ||
| } | ||
|
|
||
| // Create a struct with a combined list of counties of countries | ||
| var countiesOfCountries = []CountiesOfCountry{ | ||
| { | ||
| Country: CountryTypeKenya, | ||
| Counties: KenyanCounties, | ||
| }, | ||
| // Other CountiesOfCountries | ||
| } | ||
|
|
||
| // ValidateCountiesOfCountries validates the county passed to a country is valid | ||
| func ValidateCountiesOfCountries(country CountryType, county CountyType) error { | ||
| // ensure we are working with a correct country type to begin with | ||
| if !country.IsValid() { | ||
| return fmt.Errorf("failed to validate country: %s", country) | ||
| } | ||
| // Validate the county too | ||
| if !county.IsValid() { | ||
| return fmt.Errorf("failed to validate county: %s", county) | ||
| } | ||
|
|
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| ok, counties := findSelectedCountryCounties(countiesOfCountries, country) | ||
| if !ok { | ||
| return fmt.Errorf("failed to find selected country's counties: %s", county) | ||
| } | ||
|
|
||
| err := findCounty(counties.Counties, county) | ||
| if err != nil { | ||
| return fmt.Errorf("failed to find county: %s", err) | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| // finds the selected country te ensure it's part of the enum, then return the respective counties it has | ||
| func findSelectedCountryCounties(countriesCounties []CountiesOfCountry, countryInput CountryType) (bool, *CountiesOfCountry) { | ||
| for i, countryCounty := range countriesCounties { | ||
| if countryCounty.Country == countryInput { | ||
| return true, &countiesOfCountries[i] | ||
| } | ||
| } | ||
| return false, nil | ||
| } | ||
|
|
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| // checks whether the county provided is present in the list of the selected country's counties | ||
| func findCounty(counties []CountyType, countyInput CountyType) error { | ||
| for _, county := range counties { | ||
| if county == countyInput { | ||
| return nil | ||
| } | ||
| } | ||
| return fmt.Errorf("failed to find county: %s", countyInput) | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,54 @@ | ||
| package enums | ||
|
|
||
| import ( | ||
| "fmt" | ||
| "io" | ||
| "strconv" | ||
| ) | ||
|
|
||
| // CountryType defines various countries available | ||
| type CountryType string | ||
|
|
||
| const ( | ||
| // CountryTypeKenya defines country type KENYA | ||
| CountryTypeKenya CountryType = "KENYA" | ||
| // Other countries | ||
| ) | ||
|
|
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| // AllCountries represents a slice of all countries available | ||
| var AllCountries = []CountryType{ | ||
| CountryTypeKenya, | ||
| } | ||
|
|
||
| // IsValid returns true if a country type is valid | ||
| func (e CountryType) IsValid() bool { | ||
| switch e { | ||
| case CountryTypeKenya: | ||
| return true | ||
| } | ||
| return false | ||
| } | ||
|
|
||
| // String converts country type to string. | ||
| func (e CountryType) String() string { | ||
| return string(e) | ||
| } | ||
|
|
||
| // UnmarshalGQL converts the supplied value to a country type. | ||
| func (e *CountryType) UnmarshalGQL(v interface{}) error { | ||
| str, ok := v.(string) | ||
| if !ok { | ||
| return fmt.Errorf("enums must be strings") | ||
| } | ||
|
|
||
| *e = CountryType(str) | ||
| if !e.IsValid() { | ||
| return fmt.Errorf("%s is not a valid CountryType", str) | ||
| } | ||
| return nil | ||
| } | ||
|
|
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| // MarshalGQL writes the country type to the supplied writer | ||
| func (e CountryType) MarshalGQL(w io.Writer) { | ||
| fmt.Fprint(w, strconv.Quote(e.String())) | ||
| } |
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