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// Copyright 2017 Unknwon
//
// Licensed under the Apache License, Version 2.0 (the "License"): you may
// not use this file except in compliance with the License. You may obtain
// a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations
// under the License.
package clog
import (
"log"
"github.com/fatih/color"
)
// Console color set for different levels.
var consoleColors = []func(a ...interface{}) string{
color.New(color.FgBlue).SprintFunc(), // Trace
color.New(color.FgGreen).SprintFunc(), // Info
color.New(color.FgYellow).SprintFunc(), // Warn
color.New(color.FgRed).SprintFunc(), // Error
color.New(color.FgHiRed).SprintFunc(), // Fatal
}
type ConsoleConfig struct {
// Minimum level of messages to be processed.
Level LEVEL
// Buffer size defines how many messages can be queued before hangs.
BufferSize int64
}
type console struct {
*log.Logger
Adapter
}
func newConsole() Logger {
return &console{
Logger: log.New(color.Output, "", log.Ldate|log.Ltime),
Adapter: Adapter{
quitChan: make(chan struct{}),
},
}
}
func (c *console) Level() LEVEL { return c.level }
func (c *console) Init(v interface{}) error {
cfg, ok := v.(ConsoleConfig)
if !ok {
return ErrConfigObject{"ConsoleConfig", v}
}
if !isValidLevel(cfg.Level) {
return ErrInvalidLevel{}
}
c.level = cfg.Level
c.msgChan = make(chan *Message, cfg.BufferSize)
return nil
}
func (c *console) ExchangeChans(errorChan chan<- error) chan *Message {
c.errorChan = errorChan
return c.msgChan
}
func (c *console) write(msg *Message) {
c.Logger.Print(consoleColors[msg.Level](msg.Body))
}
func (c *console) Start() {
LOOP:
for {
select {
case msg := <-c.msgChan:
c.write(msg)
case <-c.quitChan:
break LOOP
}
}
for {
if len(c.msgChan) == 0 {
break
}
c.write(<-c.msgChan)
}
c.quitChan <- struct{}{} // Notify the cleanup is done.
}
func (c *console) Destroy() {
c.quitChan <- struct{}{}
<-c.quitChan
close(c.msgChan)
close(c.quitChan)
}
func init() {
Register(CONSOLE, newConsole)
}
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