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126 lines
3.2 KiB
126 lines
3.2 KiB
// Copyright 2014 beego Author. All Rights Reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package logs
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import (
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"encoding/json"
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"fmt"
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"os"
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"strings"
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"github.com/pkg/errors"
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"github.com/shiena/ansicolor"
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)
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// brush is a color join function
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type brush func(string) string
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// newBrush returns a fix color Brush
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func newBrush(color string) brush {
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pre := "\033["
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reset := "\033[0m"
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return func(text string) string {
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return pre + color + "m" + text + reset
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}
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}
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var colors = []brush{
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newBrush("1;37"), // Emergency white
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newBrush("1;36"), // Alert cyan
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newBrush("1;35"), // Critical magenta
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newBrush("1;31"), // Error red
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newBrush("1;33"), // Warning yellow
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newBrush("1;32"), // Notice green
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newBrush("1;34"), // Informational blue
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newBrush("1;44"), // Debug Background blue
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}
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// consoleWriter implements LoggerInterface and writes messages to terminal.
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type consoleWriter struct {
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lg *logWriter
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formatter LogFormatter
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Formatter string `json:"formatter"`
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Level int `json:"level"`
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Colorful bool `json:"color"` // this filed is useful only when system's terminal supports color
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}
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func (c *consoleWriter) Format(lm *LogMsg) string {
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msg := lm.OldStyleFormat()
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if c.Colorful {
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msg = strings.Replace(msg, levelPrefix[lm.Level], colors[lm.Level](levelPrefix[lm.Level]), 1)
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}
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h, _, _ := formatTimeHeader(lm.When)
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return string(append(h, msg...))
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}
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func (c *consoleWriter) SetFormatter(f LogFormatter) {
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c.formatter = f
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}
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// NewConsole creates ConsoleWriter returning as LoggerInterface.
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func NewConsole() Logger {
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return newConsole()
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}
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func newConsole() *consoleWriter {
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cw := &consoleWriter{
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lg: newLogWriter(ansicolor.NewAnsiColorWriter(os.Stdout)),
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Level: LevelDebug,
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Colorful: true,
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}
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cw.formatter = cw
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return cw
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}
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// Init initianlizes the console logger.
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// jsonConfig must be in the format '{"level":LevelTrace}'
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func (c *consoleWriter) Init(config string) error {
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if len(config) == 0 {
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return nil
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}
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res := json.Unmarshal([]byte(config), c)
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if res == nil && len(c.Formatter) > 0 {
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fmtr, ok := GetFormatter(c.Formatter)
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if !ok {
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return errors.New(fmt.Sprintf("the formatter with name: %s not found", c.Formatter))
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}
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c.formatter = fmtr
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}
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return res
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}
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// WriteMsg writes message in console.
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func (c *consoleWriter) WriteMsg(lm *LogMsg) error {
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if lm.Level > c.Level {
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return nil
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}
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msg := c.formatter.Format(lm)
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c.lg.writeln(msg)
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return nil
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}
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// Destroy implementing method. empty.
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func (c *consoleWriter) Destroy() {
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}
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// Flush implementing method. empty.
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func (c *consoleWriter) Flush() {
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}
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func init() {
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Register(AdapterConsole, NewConsole)
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}
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