mirror of
https://github.com/foxcpp/maddy.git
synced 2025-04-03 05:07:38 +03:00
85 lines
2 KiB
Go
85 lines
2 KiB
Go
/*
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Maddy Mail Server - Composable all-in-one email server.
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Copyright © 2019-2020 Max Mazurov <fox.cpp@disroot.org>, Maddy Mail Server contributors
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This program is free software: you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation, either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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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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"sort"
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"strings"
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"time"
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)
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// To support ad-hoc parsing in a better way we want to make order of fields in
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// output JSON documents determistics. Additionally, this will make them more
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// human-readable when values from multiple messages are lined up to each
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// other.
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type module interface {
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Name() string
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InstanceName() string
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}
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func marshalOrderedJSON(output *strings.Builder, m map[string]interface{}) error {
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order := make([]string, 0, len(m))
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for k := range m {
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order = append(order, k)
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}
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sort.Strings(order)
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output.WriteRune('{')
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for i, key := range order {
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if i != 0 {
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output.WriteRune(',')
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}
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jsonKey, err := json.Marshal(key)
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if err != nil {
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return err
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}
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output.Write(jsonKey)
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output.WriteString(":")
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val := m[key]
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switch casted := val.(type) {
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case time.Time:
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val = casted.Format("2006-01-02T15:04:05.000")
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case time.Duration:
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val = casted.String()
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case LogFormatter:
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val = casted.FormatLog()
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case fmt.Stringer:
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val = casted.String()
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case module:
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val = casted.Name() + "/" + casted.InstanceName()
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case error:
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val = casted.Error()
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}
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jsonValue, err := json.Marshal(val)
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if err != nil {
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return err
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}
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output.Write(jsonValue)
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}
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output.WriteRune('}')
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return nil
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}
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