79 lines
1.9 KiB
Go
79 lines
1.9 KiB
Go
// Copyright 2023 Martin Riedl
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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 log
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import (
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"encoding/json"
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"fmt"
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"log"
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"time"
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)
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type FormatterJSON struct {
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FlatContent bool
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TimeFormat string
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data map[string]interface{}
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}
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func NewFormatterJSON() *FormatterJSON {
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return &FormatterJSON{
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TimeFormat: time.RFC3339,
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}
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}
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func (formatter *FormatterJSON) Begin(entry *Entry) {
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// reset formatter
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formatter.data = make(map[string]interface{})
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// add timestamp
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formatter.data["time"] = entry.Time.Format(formatter.TimeFormat)
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// add log level
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formatter.data["level"] = entry.Level.String()
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}
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func (formatter *FormatterJSON) Process(entry *Entry) {
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// add message
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formatter.data["message"] = entry.Message
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// add call stack
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if len(entry.CallStack) > 0 {
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caller := entry.CallStack[0]
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formatter.data["file"] = fmt.Sprintf("%s:%d", caller.File, caller.Line)
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formatter.data["function"] = caller.Function
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}
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// add additional fields
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if formatter.FlatContent {
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for _, content := range entry.Content {
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formatter.data[content.Key] = content.Value
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}
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} else {
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formatter.data["fields"] = entry.Content
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}
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}
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func (formatter *FormatterJSON) End(entry *Entry) []byte {
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// build JSON
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data, err := json.Marshal(formatter.data)
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if err != nil {
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// marshal should never fail
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log.Println(err)
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return []byte{}
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}
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// return json data
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return data
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}
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