feat: refactor logging functions to use ZapLogger interface

- Add a new interface `ZapLogger` with `Info` and `Error` methods
- Change the type of the `logger` parameter in the `Ginzap` function to `ZapLogger`
- Change the type of the `logger` parameter in the `GinzapWithConfig` function to `ZapLogger`
- Change the type of the `logger` parameter in the `RecoveryWithZap` function to `ZapLogger`
- Change the type of the `logger` parameter in the `CustomRecoveryWithZap` function to `ZapLogger`

co-author: @a5r0n https://github.com/a5r0n

fix #39
fix #38

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

zap.go

@@ -18,6 +18,12 @@ import (
 
 type Fn func(c *gin.Context) []zapcore.Field
 
+// ZapLogger is the minimal logger interface compatible with zap.Logger
+type ZapLogger interface {
+	Info(msg string, fields ...zap.Field)
+	Error(msg string, fields ...zap.Field)
+}
+
 // Config is config setting for Ginzap
 type Config struct {
 	TimeFormat string
@@ -34,12 +40,12 @@ type Config struct {
 // It receives:
 //  1. A time package format string (e.g. time.RFC3339).
 //  2. A boolean stating whether to use UTC time zone or local.
-func Ginzap(logger *zap.Logger, timeFormat string, utc bool) gin.HandlerFunc {
+func Ginzap(logger ZapLogger, timeFormat string, utc bool) gin.HandlerFunc {
 	return GinzapWithConfig(logger, &Config{TimeFormat: timeFormat, UTC: utc})
 }
 
 // GinzapWithConfig returns a gin.HandlerFunc using configs
-func GinzapWithConfig(logger *zap.Logger, conf *Config) gin.HandlerFunc {
+func GinzapWithConfig(logger ZapLogger, conf *Config) gin.HandlerFunc {
 	skipPaths := make(map[string]bool, len(conf.SkipPaths))
 	for _, path := range conf.SkipPaths {
 		skipPaths[path] = true
@@ -97,7 +103,7 @@ func defaultHandleRecovery(c *gin.Context, err interface{}) {
 // All errors are logged using zap.Error().
 // stack means whether output the stack info.
 // The stack info is easy to find where the error occurs but the stack info is too large.
-func RecoveryWithZap(logger *zap.Logger, stack bool) gin.HandlerFunc {
+func RecoveryWithZap(logger ZapLogger, stack bool) gin.HandlerFunc {
 	return CustomRecoveryWithZap(logger, stack, defaultHandleRecovery)
 }
 
@@ -106,7 +112,7 @@ func RecoveryWithZap(logger *zap.Logger, stack bool) gin.HandlerFunc {
 // All errors are logged using zap.Error().
 // stack means whether output the stack info.
 // The stack info is easy to find where the error occurs but the stack info is too large.
-func CustomRecoveryWithZap(logger *zap.Logger, stack bool, recovery gin.RecoveryFunc) gin.HandlerFunc {
+func CustomRecoveryWithZap(logger ZapLogger, stack bool, recovery gin.RecoveryFunc) gin.HandlerFunc {
 	return func(c *gin.Context) {
 		defer func() {
 			if err := recover(); err != nil {