package drive

import (
    "google.golang.org/api/googleapi"
    "time"
)

const MaxBackendErrorRetries = 5

func isBackendError(err error) bool {
    if err == nil {
        return false
    }

    ae, ok := err.(*googleapi.Error)
    return ok && ae.Code >= 500 && ae.Code <= 599
}

func exponentialBackoffSleep(try int) {
    seconds := pow(2, try)
    time.Sleep(time.Duration(seconds) * time.Second)
}