Function NewConditional

internal/check/conditional.go:41–78

NewConditional creates a new `conditional`-based rule.

(cfg *core.Config, generic baseCheck, path string)

// NewConditional creates a new `conditional`-based rule.
func NewConditional(cfg *core.Config, generic baseCheck, path string) (Conditional, error) {
	var expression []*regexp2.Regexp
	rule := Conditional{Vocab: true}

	err := decodeRule(generic, &rule)
	if err != nil {
		return rule, readStructureError(err, path)
	}

	err = checkScopes(rule.Scope, path)
	if err != nil {
		return rule, err
	}

	re, err := updateExceptions(rule.Exceptions, cfg.AcceptedTokens, rule.Vocab)
	if err != nil {
		return rule, core.NewE201FromPosition(err.Error(), path, 1)
	}
	rule.exceptRe = re
	rule.phraseRe = buildPhraseRe(rule.Exceptions, cfg.AcceptedTokens, rule.Vocab)

	re, err = regexp2.CompileStd(rule.Second)
	if err != nil {
		return rule, core.NewE201FromPosition(err.Error(), path, 1)
	}
	expression = append(expression, re)
	rule.secondHasGroup = hasCaptureGroup(rule.Second)

	re, err = regexp2.CompileStd(rule.First)
	if err != nil {
		return rule, core.NewE201FromPosition(err.Error(), path, 1)
	}
	expression = append(expression, re)

	// TODO: How do we support multiple patterns?
	rule.patterns = expression
	return rule, nil
}

// Run evaluates the given conditional statement.
func (c Conditional) Run(blk nlp.Block, f *core.File, cfg *core.Config) ([]core.Alert, error) {