feat(rules): add the aggressive deadline option to nl and br

rules/nl/deadline.go

@@ -11,12 +11,23 @@ import (
 	"github.com/pkg/errors"
 )
 
-func Deadline(s rules.Strategy) rules.Rule {
+// DeadlineOptions configures the Deadline rule.
+type DeadlineOptions struct {
+	// Aggressive makes the "binnen"/"in"/"over"/"na" prefix optional, so "3 dagen" matches too.
+	Aggressive bool
+}
+
+func Deadline(s rules.Strategy, opts ...DeadlineOptions) rules.Rule {
 	overwrite := s == rules.Override
 
+	prefix := "(binnen|in|over|na)"
+	if len(opts) > 0 && opts[0].Aggressive {
+		prefix += "?"
+	}
+
 	return &rules.F{
 		RegExp: regexp.MustCompile(
-			"(?i)(?:\\W|^)(binnen|in|over|na)\\s*" +
+			"(?i)(?:\\W|^)" + prefix + "\\s*" +
 				"(" + INTEGER_WORDS_PATTERN + "|[0-9]+|een(?:\\s*(paar|half|halve))?)\\s*" +
 				"(seconden?|minuut|minuten|uur|uren|dag|dagen|week|weken|maand|maanden|jaar|jaren)\\s*" +
 				"(?:\\W|$)"),