Provides a quick format method by PatternLogFormatter struct

pkg/infrastructure/logs/formatter.go

@@ -14,12 +14,39 @@
 
 package logs
 
+import (
+	"path"
+	"strconv"
+)
+
 var formatterMap = make(map[string]LogFormatter, 4)
 
 type LogFormatter interface {
 	Format(lm *LogMsg) string
 }
 
+// PatternLogFormatter provides a quick format method
+// for example:
+// tes := PatternLogFormatter{Pattern: "%F:%n|%w %t>> %m", WhenFormat: "2006-01-02"}
+// RegisterFormatter("tes", tes)
+// SetGlobalFormatter("tes")
+type PatternLogFormatter struct {
+	Pattern    string
+	WhenFormat string
+}
+
+func (p PatternLogFormatter) getWhenFormatter() string {
+	s := p.WhenFormat
+	if s == "" {
+		s = "2006/01/02 15:04:05.123" // default style
+	}
+	return s
+}
+
+func (p PatternLogFormatter) Format(lm *LogMsg) string {
+	return p.ToString(lm)
+}
+
 // RegisterFormatter register an formatter. Usually you should use this to extend your custom formatter
 // for example:
 // RegisterFormatter("my-fmt", &MyFormatter{})
@@ -32,3 +59,31 @@ func GetFormatter(name string) (LogFormatter, bool) {
 	res, ok := formatterMap[name]
 	return res, ok
 }
+
+// 'w' when, 'm' msg,'f' filename，'F' full path，'n' line number
+// 'l' level number, 't' prefix of level type, 'T' full name of level type
+func (p PatternLogFormatter) ToString(lm *LogMsg) string {
+	s := []rune(p.Pattern)
+	m := map[rune]string{
+		'w': lm.When.Format(p.getWhenFormatter()),
+		'm': lm.Msg,
+		'n': strconv.Itoa(lm.LineNumber),
+		'l': strconv.Itoa(lm.Level),
+		't': levelPrefix[lm.Level-1],
+		'T': levelNames[lm.Level-1],
+		'F': lm.FilePath,
+	}
+	_, m['f'] = path.Split(lm.FilePath)
+	res := ""
+	for i := 0; i < len(s)-1; i++ {
+		if s[i] == '%' {
+			if k, ok := m[s[i+1]]; ok {
+				res += k
+				i++
+				continue
+			}
+		}
+		res += string(s[i])
+	}
+	return res
+}

pkg/infrastructure/logs/formatter_test.go

@@ -0,0 +1,28 @@
+package logs
+
+import (
+	"strconv"
+	"testing"
+	"time"
+)
+
+func TestPatternLogFormatter(t *testing.T) {
+	tes := PatternLogFormatter{
+		Pattern:    "%F:%n|%w%t>> %m",
+		WhenFormat: "2006-01-02",
+	}
+	when := time.Now()
+	lm := &LogMsg{
+		Msg:        "message",
+		FilePath:   "/User/go/beego/main.go",
+		Level:      LevelWarn,
+		LineNumber: 10,
+		When:       when,
+	}
+	got := tes.ToString(lm)
+	want := lm.FilePath + ":" + strconv.Itoa(lm.LineNumber) + "|" +
+		when.Format(tes.WhenFormat) + levelPrefix[lm.Level-1] + ">> " + lm.Msg
+	if got != want {
+		t.Errorf("want %s, got %s", want, got)
+	}
+}