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Janelle Law
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Oct 13, 2023
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,95 @@ | ||
| package logger | ||
|
|
||
| import ( | ||
| "context" | ||
| "fmt" | ||
| "log/slog" | ||
| "math" | ||
| "math/rand" | ||
| "strings" | ||
|
|
||
| "github.com/charmbracelet/lipgloss" | ||
| gsync "github.com/kralicky/gpkg/sync" | ||
| slogmulti "github.com/samber/slog-multi" | ||
| ) | ||
|
|
||
| var ( | ||
| colorCache gsync.Map[string, lipgloss.Style] | ||
| ) | ||
|
|
||
| func init() { | ||
| colorCache.Store("totem", lipgloss.NewStyle().Background(lipgloss.Color("15")).Foreground(lipgloss.Color("0"))) | ||
|
|
||
| } | ||
|
|
||
| func newRandomForegroundStyle() lipgloss.Style { | ||
| r := math.Round(rand.Float64()*127) + 127 | ||
| g := math.Round(rand.Float64()*127) + 127 | ||
| b := math.Round(rand.Float64()*127) + 127 | ||
| return lipgloss.NewStyle().Foreground(lipgloss.Color(fmt.Sprintf("#%02x%02x%02x", int(r), int(g), int(b)))) | ||
| } | ||
|
|
||
| func newTotemNameMiddleware() slogmulti.Middleware { | ||
| return func(next slog.Handler) slog.Handler { | ||
| return &totemNameMiddleware{ | ||
| next: next, | ||
| } | ||
| } | ||
| } | ||
|
|
||
| type totemNameMiddleware struct { | ||
| next slog.Handler | ||
| groups []string | ||
| } | ||
|
|
||
| func (h *totemNameMiddleware) Enabled(ctx context.Context, level slog.Level) bool { | ||
| return h.next.Enabled(ctx, level) | ||
| } | ||
|
|
||
| func (h *totemNameMiddleware) Handle(ctx context.Context, record slog.Record) error { | ||
| attrs := []slog.Attr{} | ||
|
|
||
| record.Attrs(func(attr slog.Attr) bool { | ||
| attrs = append(attrs, attr) | ||
| return true | ||
| }) | ||
|
|
||
| sb := strings.Builder{} | ||
| for i, part := range h.groups { | ||
| if c, ok := colorCache.Load(part); !ok { | ||
| newStyle := newRandomForegroundStyle() | ||
| colorCache.Store(part, newStyle) | ||
| sb.WriteString(newStyle.Render(part)) | ||
| } else { | ||
| sb.WriteString(c.Render(part)) | ||
| } | ||
| if i < len(h.groups)-1 { | ||
| sb.WriteString(".") | ||
| } else { | ||
| sb.WriteByte(' ') | ||
| } | ||
| } | ||
|
|
||
| // insert logger name before message | ||
| sb.WriteString(record.Message) | ||
|
|
||
| record = slog.NewRecord(record.Time, record.Level, sb.String(), record.PC) | ||
| record.AddAttrs(attrs...) | ||
|
|
||
| return h.next.Handle(ctx, record) | ||
| } | ||
|
|
||
| func (h *totemNameMiddleware) WithAttrs(attrs []slog.Attr) slog.Handler { | ||
|
|
||
| return &totemNameMiddleware{ | ||
| next: h.next.WithAttrs(attrs), | ||
| groups: h.groups, | ||
| } | ||
| } | ||
|
|
||
| func (h *totemNameMiddleware) WithGroup(name string) slog.Handler { | ||
| return &totemNameMiddleware{ | ||
| next: h.next.WithGroup(name), | ||
| groups: append(h.groups, name), | ||
| } | ||
| } |