35 lines
657 B
Go
35 lines
657 B
Go
package internal
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import (
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"context"
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"fmt"
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"io"
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"os"
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"time"
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)
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// ReportLogger writes a simple, human readable, line to the provided io.Writer for each
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// ReportItem received.
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type ReportLogger struct {
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counter int
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writer io.Writer
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}
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func NewStdOutLogger() *ReportLogger {
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return &ReportLogger{
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writer: os.Stdout,
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}
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}
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func NewReportLogger(w io.Writer) *ReportLogger {
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return &ReportLogger{
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writer: w,
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}
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}
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func (rl *ReportLogger) Write(_ context.Context, ri ReportItem) error {
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rl.counter++
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_, err := fmt.Fprintf(rl.writer, "%6d - realised %+f on %s\n", rl.counter, ri.RealisedPnL(), ri.SellTimestamp.Format(time.RFC3339))
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return err
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}
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