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config.go
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config.go
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// Copyright 2024 FishGoddess. All Rights Reserved.
//
// 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 logit
import (
"io"
"log/slog"
"os"
"time"
"github.com/FishGoddess/logit/handler"
)
type nilSyncer struct{}
func (nilSyncer) Sync() error {
return nil
}
type nilCloser struct{}
func (nilCloser) Close() error {
return nil
}
type config struct {
level slog.Level
handler string
newWriter func() (io.Writer, error)
wrapWriter func(io.Writer) io.Writer
replaceAttr func(groups []string, attr slog.Attr) slog.Attr
withSource bool
withPID bool
syncTimer time.Duration
}
func newDefaultConfig() *config {
newWriter := func() (io.Writer, error) {
return os.Stdout, nil
}
conf := &config{
level: slog.LevelDebug,
handler: handler.Tape,
newWriter: newWriter,
wrapWriter: nil,
replaceAttr: nil,
withSource: false,
withPID: false,
syncTimer: 0,
}
return conf
}
func (c *config) newSyncer(handler slog.Handler, writer io.Writer) Syncer {
if syncer, ok := handler.(Syncer); ok {
return syncer
}
if syncer, ok := writer.(Syncer); ok {
return syncer
}
return nilSyncer{}
}
func (c *config) newCloser(handler slog.Handler, writer io.Writer) io.Closer {
if closer, ok := handler.(io.Closer); ok {
return closer
}
if closer, ok := writer.(io.Closer); ok {
return closer
}
return nilCloser{}
}
func (c *config) newHandlerOptions() *slog.HandlerOptions {
opts := &slog.HandlerOptions{
Level: c.level,
AddSource: c.withSource,
ReplaceAttr: c.replaceAttr,
}
return opts
}
func (c *config) newHandler() (slog.Handler, Syncer, io.Closer, error) {
newHandler, err := handler.Get(c.handler)
if err != nil {
return nil, nil, nil, err
}
writer, err := c.newWriter()
if err != nil {
return nil, nil, nil, err
}
if c.wrapWriter != nil {
writer = c.wrapWriter(writer)
}
opts := c.newHandlerOptions()
handler := newHandler(writer, opts)
syncer := c.newSyncer(handler, writer)
closer := c.newCloser(handler, writer)
return handler, syncer, closer, nil
}