providers/validate: Add more functions

providers/validate/validate.go

@@ -1,6 +1,7 @@
 package validate
 
 import "regexp"
+import "unicode"
 import "html/template"
 import "git.tebibyte.media/sashakoshka/step"
 
@@ -17,6 +18,7 @@ func (this *Provider) Package () string {
 	return "validate"
 }
 
+// Configure fulfills the step.Configurable interface.
 func (this *Provider) Configure (config step.Meta) error {
 	emailRegexpText := config.Get("validate.email-regexp")
 	this.emailRegexp = nil
@@ -31,8 +33,10 @@ func (this *Provider) Configure (config step.Meta) error {
 // FuncMap fulfills the step.FuncProvider interface.
 func (this *Provider) FuncMap () template.FuncMap {
 	return template.FuncMap {
-		"isEmail": this.funcIsEmail,
-		"inRange": this.funcInRange,
+		"isEmail":    this.funcIsEmail,
+		"isPrint":    this.funcIsPrint,
+		"inRange":    this.funcInRange,
+		"strInRange": this.funcStrInRange,
 	}
 }
 
@@ -42,6 +46,17 @@ func (this *Provider) funcIsEmail (input string) bool {
 	return emailRegexp.Match([]byte(input))
 }
 
+func (this *Provider) funcIsPrint (input string) bool {
+	for _, run := range input {
+		if !unicode.IsPrint(run) { return false }
+	}
+	return true
+}
+
 func (this *Provider) funcInRange (min, max, value int) bool {
 	return value >= min && value <= max
 }
+
+func (this *Provider) funcStrInRange (min, max int, value string) bool {
+	return len(value) >= min && len(value) <= max
+}