package validation import ( "fmt" "net" "reflect" "regexp" "strings" "github.com/hashicorp/terraform/helper/schema" "github.com/hashicorp/terraform/helper/structure" ) // IntBetween returns a SchemaValidateFunc which tests if the provided value // is of type int and is between min and max (inclusive) func IntBetween(min, max int) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(int) if !ok { es = append(es, fmt.Errorf("expected type of %s to be int", k)) return } if v < min || v > max { es = append(es, fmt.Errorf("expected %s to be in the range (%d - %d), got %d", k, min, max, v)) return } return } } // IntAtLeast returns a SchemaValidateFunc which tests if the provided value // is of type int and is at least min (inclusive) func IntAtLeast(min int) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(int) if !ok { es = append(es, fmt.Errorf("expected type of %s to be int", k)) return } if v < min { es = append(es, fmt.Errorf("expected %s to be at least (%d), got %d", k, min, v)) return } return } } // IntAtMost returns a SchemaValidateFunc which tests if the provided value // is of type int and is at most max (inclusive) func IntAtMost(max int) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(int) if !ok { es = append(es, fmt.Errorf("expected type of %s to be int", k)) return } if v > max { es = append(es, fmt.Errorf("expected %s to be at most (%d), got %d", k, max, v)) return } return } } // StringInSlice returns a SchemaValidateFunc which tests if the provided value // is of type string and matches the value of an element in the valid slice // will test with in lower case if ignoreCase is true func StringInSlice(valid []string, ignoreCase bool) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(string) if !ok { es = append(es, fmt.Errorf("expected type of %s to be string", k)) return } for _, str := range valid { if v == str || (ignoreCase && strings.ToLower(v) == strings.ToLower(str)) { return } } es = append(es, fmt.Errorf("expected %s to be one of %v, got %s", k, valid, v)) return } } // StringLenBetween returns a SchemaValidateFunc which tests if the provided value // is of type string and has length between min and max (inclusive) func StringLenBetween(min, max int) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(string) if !ok { es = append(es, fmt.Errorf("expected type of %s to be string", k)) return } if len(v) < min || len(v) > max { es = append(es, fmt.Errorf("expected length of %s to be in the range (%d - %d), got %s", k, min, max, v)) } return } } // NoZeroValues is a SchemaValidateFunc which tests if the provided value is // not a zero value. It's useful in situations where you want to catch // explicit zero values on things like required fields during validation. func NoZeroValues(i interface{}, k string) (s []string, es []error) { if reflect.ValueOf(i).Interface() == reflect.Zero(reflect.TypeOf(i)).Interface() { switch reflect.TypeOf(i).Kind() { case reflect.String: es = append(es, fmt.Errorf("%s must not be empty", k)) case reflect.Int, reflect.Float64: es = append(es, fmt.Errorf("%s must not be zero", k)) default: // this validator should only ever be applied to TypeString, TypeInt and TypeFloat panic(fmt.Errorf("can't use NoZeroValues with %T attribute %s", i, k)) } } return } // CIDRNetwork returns a SchemaValidateFunc which tests if the provided value // is of type string, is in valid CIDR network notation, and has significant bits between min and max (inclusive) func CIDRNetwork(min, max int) schema.SchemaValidateFunc { return func(i interface{}, k string) (s []string, es []error) { v, ok := i.(string) if !ok { es = append(es, fmt.Errorf("expected type of %s to be string", k)) return } _, ipnet, err := net.ParseCIDR(v) if err != nil { es = append(es, fmt.Errorf( "expected %s to contain a valid CIDR, got: %s with err: %s", k, v, err)) return } if ipnet == nil || v != ipnet.String() { es = append(es, fmt.Errorf( "expected %s to contain a valid network CIDR, expected %s, got %s", k, ipnet, v)) } sigbits, _ := ipnet.Mask.Size() if sigbits < min || sigbits > max { es = append(es, fmt.Errorf( "expected %q to contain a network CIDR with between %d and %d significant bits, got: %d", k, min, max, sigbits)) } return } } // ValidateJsonString is a SchemaValidateFunc which tests to make sure the // supplied string is valid JSON. func ValidateJsonString(v interface{}, k string) (ws []string, errors []error) { if _, err := structure.NormalizeJsonString(v); err != nil { errors = append(errors, fmt.Errorf("%q contains an invalid JSON: %s", k, err)) } return } // ValidateListUniqueStrings is a ValidateFunc that ensures a list has no // duplicate items in it. It's useful for when a list is needed over a set // because order matters, yet the items still need to be unique. func ValidateListUniqueStrings(v interface{}, k string) (ws []string, errors []error) { for n1, v1 := range v.([]interface{}) { for n2, v2 := range v.([]interface{}) { if v1.(string) == v2.(string) && n1 != n2 { errors = append(errors, fmt.Errorf("%q: duplicate entry - %s", k, v1.(string))) } } } return } // ValidateRegexp returns a SchemaValidateFunc which tests to make sure the // supplied string is a valid regular expression. func ValidateRegexp(v interface{}, k string) (ws []string, errors []error) { if _, err := regexp.Compile(v.(string)); err != nil { errors = append(errors, fmt.Errorf("%q: %s", k, err)) } return }