forked from emilevs/label_printer
53 lines
1.3 KiB
Go
53 lines
1.3 KiB
Go
package main
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import (
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"context"
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"errors"
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"log/slog"
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"slices"
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)
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// slogMultiHandler is a simple slog.Handler that passes slog.Records on to
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// every inner slog.Handler of the slice.
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type slogMultiHandler []slog.Handler
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func (smh slogMultiHandler) Enabled(ctx context.Context, level slog.Level) bool {
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for _, h := range smh {
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if h.Enabled(ctx, level) {
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return true
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}
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}
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return false
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}
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func (smh slogMultiHandler) Handle(ctx context.Context, record slog.Record) error {
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retValues := make([]error, len(smh))
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for i, h := range smh {
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if !h.Enabled(ctx, record.Level) {
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continue
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}
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retValues[i] = h.Handle(ctx, record)
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}
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return errors.Join(retValues...)
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}
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func (smh slogMultiHandler) WithAttrs(attrs []slog.Attr) slog.Handler {
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newHandlers := make([]slog.Handler, len(smh))
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for i, h := range smh {
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// From slog.Handler.WithAttrs godoc:
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// "The Handler owns the slice: it may retain, modify or discard it."
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// Clone the slice so that modifications don't impact other slog.Handlers.
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newHandlers[i] = h.WithAttrs(slices.Clone(attrs))
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}
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return slogMultiHandler(newHandlers)
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}
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func (smh slogMultiHandler) WithGroup(name string) slog.Handler {
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newHandlers := make([]slog.Handler, len(smh))
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for i, h := range smh {
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newHandlers[i] = h.WithGroup(name)
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}
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return slogMultiHandler(newHandlers)
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}
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