Merge pull request #463 from spiral/experiment/core_pluginsv2.0.0-beta1

[RR2] Plugins

1 files changed, 94 insertions, 0 deletions

diff --git a/plugins/logger/config.go b/plugins/logger/config.go
new file mode 100644
index 00000000..f7a5742c
--- /dev/null
+++ b/plugins/logger/config.go
@@ -0,0 +1,94 @@
+package logger
+
+import (
+	"strings"
+
+	"go.uber.org/zap"
+	"go.uber.org/zap/zapcore"
+)
+
+// ChannelConfig configures loggers per channel.
+type ChannelConfig struct {
+	// Dedicated channels per logger. By default logger allocated via named logger.
+	Channels map[string]Config `json:"channels" yaml:"channels"`
+}
+
+type Config struct {
+	// Mode configures logger based on some default template (development, production, off).
+	Mode string `json:"mode" yaml:"mode"`
+
+	// Level is the minimum enabled logging level. Note that this is a dynamic
+	// level, so calling ChannelConfig.Level.SetLevel will atomically change the log
+	// level of all loggers descended from this config.
+	Level string `json:"level" yaml:"level"`
+
+	// Encoding sets the logger's encoding. Valid values are "json" and
+	// "console", as well as any third-party encodings registered via
+	// RegisterEncoder.
+	Encoding string `json:"encoding" yaml:"encoding"`
+
+	// Output is a list of URLs or file paths to write logging output to.
+	// See Open for details.
+	Output []string `json:"output" yaml:"output"`
+
+	// ErrorOutput is a list of URLs to write internal logger errors to.
+	// The default is standard error.
+	//
+	// Note that this setting only affects internal errors; for sample code that
+	// sends error-level logs to a different location from info- and debug-level
+	// logs, see the package-level AdvancedConfiguration example.
+	ErrorOutput []string `json:"errorOutput" yaml:"errorOutput"`
+}
+
+// ZapConfig converts config into Zap configuration.
+func (cfg *Config) BuildLogger() (*zap.Logger, error) {
+	var zCfg zap.Config
+	switch strings.ToLower(cfg.Mode) {
+	case "off", "none":
+		return zap.NewNop(), nil
+	case "production":
+		zCfg = zap.NewProductionConfig()
+	case "development":
+		zCfg = zap.NewDevelopmentConfig()
+	default:
+		zCfg = zap.Config{
+			Level:    zap.NewAtomicLevelAt(zap.DebugLevel),
+			Encoding: "console",
+			EncoderConfig: zapcore.EncoderConfig{
+				MessageKey:   "message",
+				LevelKey:     "level",
+				TimeKey:      "time",
+				NameKey:      "name",
+				EncodeName:   ColoredHashedNameEncoder,
+				EncodeLevel:  ColoredLevelEncoder,
+				EncodeTime:   UTCTimeEncoder,
+				EncodeCaller: zapcore.ShortCallerEncoder,
+			},
+			OutputPaths:      []string{"stderr"},
+			ErrorOutputPaths: []string{"stderr"},
+		}
+	}
+
+	if cfg.Level != "" {
+		level := zap.NewAtomicLevel()
+		if err := level.UnmarshalText([]byte(cfg.Level)); err == nil {
+			zCfg.Level = level
+		}
+	}
+
+	if cfg.Encoding != "" {
+		zCfg.Encoding = cfg.Encoding
+	}
+
+	if len(cfg.Output) != 0 {
+		zCfg.OutputPaths = cfg.Output
+	}
+
+	if len(cfg.ErrorOutput) != 0 {
+		zCfg.ErrorOutputPaths = cfg.ErrorOutput
+	}
+
+	// todo: https://github.com/uber-go/zap/blob/master/FAQ.md#does-zap-support-log-rotation
+
+	return zCfg.Build()
+}