Fs02/grimoire

// Package changeset used to cast and validate data before saving it to the database.
package changeset

import (
    "strings"

    "github.com/Fs02/grimoire/errors"
)

// Constraint defines information to infer constraint error.
type Constraint struct {
    Field   string
    Message string
    Code    int
    Name    string
    Exact   bool
    Kind    errors.Kind
}

// Constraints is slice of Constraint
type Constraints []Constraint

// GetError converts error based on constraints.
// If the original error is constraint error, and it's defined in the constraint list, then it'll be updated with constraint's message.
// If the original error is constraint error but not defined in the constraint list, it'll be converted to unexpected error.
// else it'll not modify the error.
func (constraints Constraints) GetError(err errors.Error) error {
    if err.Kind() == errors.Unexpected || err.Kind() == errors.Changeset || err.Kind() == errors.NotFound {
        return err
    }

    for _, c := range constraints {
        if c.Kind == err.Kind() {
            if c.Exact && c.Name != err.Field {
                continue
            }

            if !c.Exact && !strings.Contains(err.Field, c.Name) {
                continue
            }

            return errors.NewWithCode(c.Message, c.Field, c.Code, c.Kind)
        }
    }

    return errors.NewUnexpected(err.Message)
}