124 lines
1.8 KiB
Go
124 lines
1.8 KiB
Go
package loading
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import (
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"context"
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"fmt"
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"time"
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)
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type Type int
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const (
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TypeProcessing Type = iota
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TypeInfo
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TypeSuccess
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TypeWarning
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TypeError
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)
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func (t Type) Symbol() string {
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switch t {
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case TypeSuccess:
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return "✔️ "
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case TypeWarning:
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return "❗ "
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case TypeError:
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return "❌ "
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case TypeInfo:
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return "❕ "
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default:
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return ""
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}
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}
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type _msg struct {
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msg string
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t Type
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}
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var frames = []string{"|", "/", "-", "\\"}
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func Do(ctx context.Context, fn func(ctx context.Context, print func(msg string, types ...Type)) error) (err error) {
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start := time.Now()
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ch := make(chan *_msg)
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defer func() {
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fmt.Printf("\r\033[K")
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}()
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go func() {
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var (
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m *_msg
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ok bool
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processing string
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)
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for {
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for _, frame := range frames {
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select {
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case <-ctx.Done():
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return
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case m, ok = <-ch:
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if !ok || m == nil {
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return
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}
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switch m.t {
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case TypeProcessing:
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if m.msg != "" {
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processing = m.msg
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}
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case TypeInfo,
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TypeSuccess,
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TypeWarning,
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TypeError:
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// Clear the loading animation
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fmt.Printf("\r\033[K")
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fmt.Printf("%s%s\n", m.t.Symbol(), m.msg)
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}
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default:
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elapsed := time.Since(start).Seconds()
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if processing != "" {
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fmt.Printf("\r\033[K%s %s (%.2fs)", frame, processing, elapsed)
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}
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time.Sleep(100 * time.Millisecond)
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}
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}
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}
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}()
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printFn := func(msg string, types ...Type) {
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if msg == "" {
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return
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}
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m := &_msg{
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msg: msg,
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t: TypeProcessing,
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}
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if len(types) > 0 {
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m.t = types[0]
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}
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ch <- m
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}
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done := make(chan struct{})
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go func() {
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if err = fn(ctx, printFn); err != nil {
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ch <- &_msg{msg: err.Error(), t: TypeError}
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}
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close(ch)
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done <- struct{}{}
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}()
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select {
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case <-ctx.Done():
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case <-done:
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}
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return err
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}
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