Fix legacy code (#4)

Co-authored-by: jolheiser <john.olheiser@gmail.com>
Reviewed-on: https://gitea.com/jolheiser/beaver/pulls/4
Co-authored-by: John Olheiser <john.olheiser@gmail.com>
Co-committed-by: John Olheiser <john.olheiser@gmail.com>

color/basic.go

@@ -82,9 +82,15 @@ func (b *Basic) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the basic color
 func (b *Basic) Format(text string) string {
 	if len(b.Attrs) > 0 {
 		return b.wrap(text)
 	}
 	return text
 }
+
+// Formatf returns a formatted string wrapped in the basic color
+func (b *Basic) Formatf(format string, v ...interface{}) string {
+	return b.Format(fmt.Sprintf(format, v...))
+}

color/basic_colors.go

@@ -47,3 +47,24 @@ const (
 	BgHiCyan
 	BgHiWhite
 )
+
+var attrCache = make(map[BasicAttribute]*Basic)
+
+func attr(a BasicAttribute) *Basic {
+	if c, ok := attrCache[a]; ok {
+		return c
+	}
+	c := New(a)
+	attrCache[a] = c
+	return c
+}
+
+// Format is a quick way to format a string using a single attribute
+func (a BasicAttribute) Format(text string) string {
+	return attr(a).Format(text)
+}
+
+// Format is a quick way to format a formatted string using a single attribute
+func (a BasicAttribute) Formatf(text string, v ...interface{}) string {
+	return attr(a).Formatf(text, v...)
+}

color/color.go

@@ -8,6 +8,7 @@ const escape = "\x1b"
 
 type Color interface {
 	Format(text string) string
+	Formatf(text string, v ...interface{}) string
 }
 
 // ParseLevel parses a string and returns a Beaver Level's Color, defaulting to Info

color/extended.go

@@ -43,6 +43,12 @@ func (e *Extended) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the extended color
 func (e *Extended) Format(text string) string {
 	return e.wrap(text)
 }
+
+// Formatf returns a formatted string wrapped in the extended color
+func (e *Extended) Formatf(text string, v ...interface{}) string {
+	return e.wrap(fmt.Sprintf(text, v...))
+}

color/true.go

@@ -40,6 +40,12 @@ func (t *True) unformat() string {
 	return fmt.Sprintf("%s[%dm", escape, Reset)
 }
 
+// Format returns a string wrapped in the true color
 func (t *True) Format(text string) string {
 	return t.wrap(text)
 }
+
+// Formatf returns a formatted string wrapped in the true color
+func (t *True) Formatf(text string, v ...interface{}) string {
+	return t.wrap(fmt.Sprintf(text, v...))
+}