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tui.go
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tui.go
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// Copyright 2020 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package tui
import (
"bufio"
"fmt"
"os"
"strings"
"syscall"
"github.com/AstroProfundis/tabby"
"github.com/fatih/color"
"github.com/pingcap/tiup/pkg/utils/mock"
"golang.org/x/term"
)
// PrintTable accepts a matrix of strings and print them as ASCII table to terminal
func PrintTable(rows [][]string, header bool) {
if f := mock.On("PrintTable"); f != nil {
f.(func([][]string, bool))(rows, header)
return
}
// Print the table
t := tabby.New()
if header {
addRow(t, rows[0], header)
rows = rows[1:]
}
for _, row := range rows {
addRow(t, row, false)
}
t.Print()
}
func addRow(t *tabby.Tabby, rawLine []string, header bool) {
// Convert []string to []interface{}
row := make([]interface{}, len(rawLine))
for i, v := range rawLine {
row[i] = v
}
// Add line to the table
if header {
t.AddHeader(row...)
} else {
t.AddLine(row...)
}
}
// pre-defined ascii art strings
const (
ASCIIArtWarning = `
██ ██ █████ ██████ ███ ██ ██ ███ ██ ██████
██ ██ ██ ██ ██ ██ ████ ██ ██ ████ ██ ██
██ █ ██ ███████ ██████ ██ ██ ██ ██ ██ ██ ██ ██ ███
██ ███ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██ ██
███ ███ ██ ██ ██ ██ ██ ████ ██ ██ ████ ██████
`
)
// Prompt accepts input from console by user
func Prompt(prompt string) string {
if prompt != "" {
prompt += " " // append a whitespace
}
fmt.Print(prompt)
reader := bufio.NewReader(os.Stdin)
input, err := reader.ReadString('\n')
if err != nil {
return ""
}
return strings.TrimSuffix(input, "\n")
}
// PromptForConfirmYes accepts yes / no from console by user, default to No and only return true
// if the user input is Yes
func PromptForConfirmYes(format string, a ...interface{}) (bool, string) {
ans := Prompt(fmt.Sprintf(format, a...) + "(default=N)")
switch strings.TrimSpace(strings.ToLower(ans)) {
case "y", "yes":
return true, ans
default:
return false, ans
}
}
// PromptForConfirmNo accepts yes / no from console by user, default to Yes and only return true
// if the user input is No
func PromptForConfirmNo(format string, a ...interface{}) (bool, string) {
ans := Prompt(fmt.Sprintf(format, a...) + "(default=Y)")
switch strings.TrimSpace(strings.ToLower(ans)) {
case "n", "no":
return true, ans
default:
return false, ans
}
}
// PromptForConfirmOrAbortError accepts yes / no from console by user, generates AbortError if user does not input yes.
func PromptForConfirmOrAbortError(format string, a ...interface{}) error {
if pass, ans := PromptForConfirmYes(format, a...); !pass {
return errOperationAbort.New("Operation aborted by user (with answer '%s')", ans)
}
return nil
}
// PromptForConfirmAnswer accepts string from console by user, default to empty and only return
// true if the user input is exactly the same as pre-defined answer.
func PromptForConfirmAnswer(answer string, format string, a ...interface{}) (bool, string) {
ans := Prompt(fmt.Sprintf(format, a...) + fmt.Sprintf("\n(Type \"%s\" to continue)\n:", color.CyanString(answer)))
if ans == answer {
return true, ans
}
return false, ans
}
// PromptForAnswerOrAbortError accepts string from console by user, generates AbortError if user does
// not input the pre-defined answer.
func PromptForAnswerOrAbortError(answer string, format string, a ...interface{}) error {
if pass, ans := PromptForConfirmAnswer(answer, format, a...); !pass {
return errOperationAbort.New("Operation aborted by user (with incorrect answer '%s')", ans)
}
return nil
}
// PromptForPassword reads a password input from console
func PromptForPassword(format string, a ...interface{}) string {
defer fmt.Println("")
fmt.Printf(format, a...)
input, err := term.ReadPassword(syscall.Stdin)
if err != nil {
return ""
}
return strings.TrimSpace(strings.Trim(string(input), "\n"))
}
// OsArch builds an "os/arch" string from input, it converts some similar strings
// to different words to avoid misreading when displaying in terminal
func OsArch(os, arch string) string {
osFmt := os
archFmt := arch
switch arch {
case "amd64":
archFmt = "x86_64"
case "arm64":
archFmt = "aarch64"
}
return fmt.Sprintf("%s/%s", osFmt, archFmt)
}