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// Copyright (C) 2019-2023 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package util
import (
"fmt"
"time"
)
const spinningCursorTickDuration = 100 * time.Millisecond
// RunFuncWithSpinningCursor runs a given function in a go-routine,
// while displaying a spinning cursor to the CLI
func RunFuncWithSpinningCursor(asyncFunc func()) {
doneChan := make(chan struct{}, 1)
go func() {
asyncFunc()
doneChan <- struct{}{}
}()
progressStrings := [...]string{"/", "-", "\\", "|"}
finished := false
i := 0
ticker := time.NewTicker(spinningCursorTickDuration)
for !finished {
select {
case <-doneChan:
finished = true
ticker.Stop()
break
case <-ticker.C:
fmt.Print(progressStrings[i])
fmt.Print("\b")
i = (i + 1) % len(progressStrings)
}
}
}
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