101 lines
3.2 KiB
Go
101 lines
3.2 KiB
Go
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package consul
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import (
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"fmt"
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"regexp"
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"time"
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"github.com/hashicorp/errwrap"
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)
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// An array of inputs used as typed arguments and converted from their type into
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// function objects that are dynamically constructed and executed.
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type validatorInputs []interface{}
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// validateDurationMin is the minimum duration to accept as input
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type validateDurationMin string
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// validateIntMin is the minimum integer value to accept as input
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type validateIntMin int
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// validateRegexp is a regexp pattern to use to validate schema input.
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type validateRegexp string
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// makeValidateionFunc takes the name of the attribute and a list of typed
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// validator inputs in order to create a validation closure that calls each
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// validator in serial until either a warning or error is returned from the
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// first validation function.
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func makeValidationFunc(name string, validators []interface{}) func(v interface{}, key string) (warnings []string, errors []error) {
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if len(validators) == 0 {
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return nil
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}
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fns := make([]func(v interface{}, key string) (warnings []string, errors []error), 0, len(validators))
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for _, v := range validators {
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switch u := v.(type) {
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case validateDurationMin:
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fns = append(fns, validateDurationMinFactory(name, string(u)))
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case validateIntMin:
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fns = append(fns, validateIntMinFactory(name, int(u)))
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case validateRegexp:
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fns = append(fns, validateRegexpFactory(name, string(u)))
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}
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}
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return func(v interface{}, key string) (warnings []string, errors []error) {
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for _, fn := range fns {
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warnings, errors = fn(v, key)
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if len(warnings) > 0 || len(errors) > 0 {
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break
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}
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}
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return warnings, errors
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}
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}
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func validateDurationMinFactory(name, minDuration string) func(v interface{}, key string) (warnings []string, errors []error) {
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dMin, err := time.ParseDuration(minDuration)
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if err != nil {
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return func(interface{}, string) (warnings []string, errors []error) {
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return nil, []error{
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errwrap.Wrapf(fmt.Sprintf("PROVIDER BUG: duration %q not valid: {{err}}", minDuration), err),
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}
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}
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}
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return func(v interface{}, key string) (warnings []string, errors []error) {
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d, err := time.ParseDuration(v.(string))
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if err != nil {
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errors = append(errors, errwrap.Wrapf(fmt.Sprintf("Invalid %s specified (%q): {{err}}", name), err))
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}
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if d < dMin {
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errors = append(errors, fmt.Errorf("Invalid %s specified: duration %q less than the required minimum %s", name, v.(string), dMin))
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}
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return warnings, errors
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}
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}
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func validateIntMinFactory(name string, min int) func(v interface{}, key string) (warnings []string, errors []error) {
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return func(v interface{}, key string) (warnings []string, errors []error) {
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if v.(int) < min {
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errors = append(errors, fmt.Errorf("Invalid %s specified: %d less than the required minimum %d", name, v.(int), min))
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}
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return warnings, errors
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}
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}
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func validateRegexpFactory(name string, reString string) func(v interface{}, key string) (warnings []string, errors []error) {
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re := regexp.MustCompile(reString)
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return func(v interface{}, key string) (warnings []string, errors []error) {
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if !re.MatchString(v.(string)) {
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errors = append(errors, fmt.Errorf("Invalid %s specified (%q): regexp failed to match string", name, v.(string)))
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}
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return warnings, errors
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}
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}
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