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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,91 @@ | ||
| /* | ||
| * @license | ||
| * Copyright 2025 Dynatrace LLC | ||
| * 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 log | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "log/slog" | ||
| "strconv" | ||
| ) | ||
|
|
||
| var _ slog.Handler = (*ColorHandler)(nil) | ||
|
|
||
| type ColorHandler struct { | ||
| handler slog.Handler | ||
| } | ||
|
|
||
| func NewColorHandler(h slog.Handler) *ColorHandler { | ||
| return &ColorHandler{ | ||
| handler: h, | ||
| } | ||
| } | ||
|
|
||
| func (c *ColorHandler) Enabled(ctx context.Context, l slog.Level) bool { | ||
| return c.handler.Enabled(ctx, l) | ||
| } | ||
|
|
||
| func (c *ColorHandler) Handle(ctx context.Context, r slog.Record) error { | ||
| if r.Level <= slog.LevelDebug { | ||
| r.Message = colorize(lightGray, r.Message) | ||
| } else if r.Level <= slog.LevelInfo { | ||
| r.Message = colorize(cyan, r.Message) | ||
| } else if r.Level < slog.LevelWarn { | ||
| r.Message = colorize(lightBlue, r.Message) | ||
| } else if r.Level < slog.LevelError { | ||
| r.Message = colorize(lightYellow, r.Message) | ||
| } else if r.Level <= slog.LevelError+1 { | ||
| r.Message = colorize(lightRed, r.Message) | ||
| } else if r.Level > slog.LevelError+1 { | ||
| r.Message = colorize(lightMagenta, r.Message) | ||
| } | ||
|
|
||
| return c.handler.Handle(ctx, r) | ||
| } | ||
|
|
||
| func (c *ColorHandler) WithAttrs(attrs []slog.Attr) slog.Handler { | ||
| return NewColorHandler(c.handler.WithAttrs(attrs)) | ||
| } | ||
|
|
||
| func (c *ColorHandler) WithGroup(name string) slog.Handler { | ||
| return NewColorHandler(c.handler.WithGroup(name)) | ||
| } | ||
|
|
||
| var ( | ||
| reset = "\033[0m" | ||
|
|
||
| //black = 30 | ||
| //red = 31 | ||
| //green = 32 | ||
| //yellow = 33 | ||
| //blue = 34 | ||
| //magenta = 35 | ||
| cyan = 36 | ||
| lightGray = 37 | ||
| //darkGray = 90 | ||
| lightRed = 91 | ||
| //lightGreen = 92 | ||
| lightYellow = 93 | ||
| lightBlue = 94 | ||
| lightMagenta = 95 | ||
| //lightCyan = 96 | ||
| //white = 97 | ||
| ) | ||
|
|
||
| func colorize(colorCode int, v string) string { | ||
| return fmt.Sprintf("\033[%sm%s%s", strconv.Itoa(colorCode), v, reset) | ||
| } |
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