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package slack
import (
"fmt"
"sync"
)
// SetLogger let's library users supply a logger, so that api debugging
// can be logged along with the application's debugging info.
func SetLogger(l logProvider) {
loggerMutex.Lock()
logger = ilogger{logProvider: l}
loggerMutex.Unlock()
}
var (
loggerMutex = new(sync.Mutex)
logger logInternal // A logger that can be set by consumers
)
// logProvider is a logger interface compatible with both stdlib and some
// 3rd party loggers such as logrus.
type logProvider interface {
Output(int, string) error
}
// logInternal represents the internal logging api we use.
type logInternal interface {
Print(...interface{})
Printf(string, ...interface{})
Println(...interface{})
Output(int, string) error
}
// ilogger implements the additional methods used by our internal logging.
type ilogger struct {
logProvider
}
// Println replicates the behaviour of the standard logger.
func (t ilogger) Println(v ...interface{}) {
t.Output(2, fmt.Sprintln(v...))
}
// Printf replicates the behaviour of the standard logger.
func (t ilogger) Printf(format string, v ...interface{}) {
t.Output(2, fmt.Sprintf(format, v...))
}
// Print replicates the behaviour of the standard logger.
func (t ilogger) Print(v ...interface{}) {
t.Output(2, fmt.Sprint(v...))
}
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