Fs02/grimoire

package changeset

import (
    "fmt"
    "strings"
)

// ValidateInclusionErrorMessage is the default error message for ValidateInclusion.
var ValidateInclusionErrorMessage = "{field} must be one of {values}"

// ValidateInclusion validates a change is included in the given values.
func ValidateInclusion(ch *Changeset, field string, values []interface{}, opts ...Option) {
    val, exist := ch.changes[field]
    if !exist {
        return
    }

    options := Options{
        message: ValidateInclusionErrorMessage,
    }
    options.apply(opts)

    invalid := true
    for _, inval := range values {
        if val == inval {
            invalid = false
            break
        }
    }

    if invalid {
        r := strings.NewReplacer("{field}", field, "{values}", fmt.Sprintf("%v", values))
        AddError(ch, field, r.Replace(options.message))
    }
}