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ui.go
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ui.go
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package terminal
import (
"fmt"
"io"
"strings"
. "code.cloudfoundry.org/cli/cf/i18n"
"bytes"
"bufio"
"code.cloudfoundry.org/cli/cf"
"code.cloudfoundry.org/cli/cf/configuration/coreconfig"
"code.cloudfoundry.org/cli/cf/trace"
)
type ColoringFunction func(value string, row int, col int) string
func NotLoggedInText() string {
return fmt.Sprintf(T("Not logged in. Use '{{.CFLoginCommand}}' to log in.", map[string]interface{}{"CFLoginCommand": CommandColor(cf.Name + " " + "login")}))
}
//go:generate counterfeiter . UI
type UI interface {
PrintPaginator(rows []string, err error)
Say(message string, args ...interface{})
// ProgressReader
PrintCapturingNoOutput(message string, args ...interface{})
Warn(message string, args ...interface{})
Ask(prompt string) (answer string)
AskForPassword(prompt string) (answer string)
Confirm(message string) bool
ConfirmDelete(modelType, modelName string) bool
ConfirmDeleteWithAssociations(modelType, modelName string) bool
Ok()
Failed(message string, args ...interface{})
ShowConfiguration(coreconfig.Reader) error
LoadingIndication()
Table(headers []string) *UITable
NotifyUpdateIfNeeded(coreconfig.Reader)
Writer() io.Writer
}
type Printer interface {
Print(a ...interface{}) (n int, err error)
Printf(format string, a ...interface{}) (n int, err error)
Println(a ...interface{}) (n int, err error)
}
type terminalUI struct {
stdin io.Reader
stdout io.Writer
printer Printer
logger trace.Printer
}
func NewUI(r io.Reader, w io.Writer, printer Printer, logger trace.Printer) UI {
return &terminalUI{
stdin: r,
stdout: w,
printer: printer,
logger: logger,
}
}
func (ui terminalUI) Writer() io.Writer {
return ui.stdout
}
func (ui *terminalUI) PrintPaginator(rows []string, err error) {
if err != nil {
ui.Failed(err.Error())
return
}
for _, row := range rows {
ui.Say(row)
}
}
func (ui *terminalUI) PrintCapturingNoOutput(message string, args ...interface{}) {
if len(args) == 0 {
fmt.Fprintf(ui.stdout, "%s", message)
} else {
fmt.Fprintf(ui.stdout, message, args...)
}
}
func (ui *terminalUI) Say(message string, args ...interface{}) {
if len(args) == 0 {
_, _ = ui.printer.Printf("%s\n", message)
} else {
_, _ = ui.printer.Printf(message+"\n", args...)
}
}
func (ui *terminalUI) Warn(message string, args ...interface{}) {
message = fmt.Sprintf(message, args...)
ui.Say(WarningColor(message))
return
}
func (ui *terminalUI) Ask(prompt string) string {
fmt.Fprintf(ui.stdout, "\n%s%s ", prompt, PromptColor(">"))
rd := bufio.NewReader(ui.stdin)
line, err := rd.ReadString('\n')
if err == nil {
return strings.TrimSpace(line)
}
return ""
}
func (ui *terminalUI) ConfirmDeleteWithAssociations(modelType, modelName string) bool {
return ui.confirmDelete(T("Really delete the {{.ModelType}} {{.ModelName}} and everything associated with it?",
map[string]interface{}{
"ModelType": modelType,
"ModelName": EntityNameColor(modelName),
}))
}
func (ui *terminalUI) ConfirmDelete(modelType, modelName string) bool {
return ui.confirmDelete(T("Really delete the {{.ModelType}} {{.ModelName}}?",
map[string]interface{}{
"ModelType": modelType,
"ModelName": EntityNameColor(modelName),
}))
}
func (ui *terminalUI) confirmDelete(message string) bool {
result := ui.Confirm(message)
if !result {
ui.Warn(T("Delete cancelled"))
}
return result
}
func (ui *terminalUI) Confirm(message string) bool {
response := ui.Ask(message)
switch strings.ToLower(response) {
case "y", "yes", T("yes"):
return true
}
return false
}
func (ui *terminalUI) Ok() {
ui.Say(SuccessColor(T("OK")))
}
func (ui *terminalUI) Failed(message string, args ...interface{}) {
message = fmt.Sprintf(message, args...)
failed := "FAILED"
if T != nil {
failed = T("FAILED")
}
ui.logger.Print(failed)
ui.logger.Print(message)
if !ui.logger.WritesToConsole() {
ui.Say(FailureColor(failed))
ui.Say(message)
}
}
func (ui *terminalUI) ShowConfiguration(config coreconfig.Reader) error {
var err error
table := ui.Table([]string{"", ""})
if config.HasAPIEndpoint() {
table.Add(
T("API endpoint:"),
T("{{.APIEndpoint}} (API version: {{.APIVersionString}})",
map[string]interface{}{
"APIEndpoint": EntityNameColor(config.APIEndpoint()),
"APIVersionString": EntityNameColor(config.APIVersion()),
}),
)
}
if !config.IsLoggedIn() {
err = table.Print()
if err != nil {
return err
}
ui.Say(NotLoggedInText())
return nil
}
table.Add(T("User:"), EntityNameColor(config.UserEmail()))
if !config.HasOrganization() && !config.HasSpace() {
err = table.Print()
if err != nil {
return err
}
command := fmt.Sprintf("%s target -o ORG -s SPACE", cf.Name)
ui.Say(T("No org or space targeted, use '{{.CFTargetCommand}}'",
map[string]interface{}{
"CFTargetCommand": CommandColor(command),
}))
return nil
}
if config.HasOrganization() {
table.Add(
T("Org:"),
EntityNameColor(config.OrganizationFields().Name),
)
} else {
command := fmt.Sprintf("%s target -o Org", cf.Name)
table.Add(
T("Org:"),
T("No org targeted, use '{{.CFTargetCommand}}'",
map[string]interface{}{
"CFTargetCommand": CommandColor(command),
}),
)
}
if config.HasSpace() {
table.Add(
T("Space:"),
EntityNameColor(config.SpaceFields().Name),
)
} else {
command := fmt.Sprintf("%s target -s SPACE", cf.Name)
table.Add(
T("Space:"),
T("No space targeted, use '{{.CFTargetCommand}}'", map[string]interface{}{"CFTargetCommand": CommandColor(command)}),
)
}
err = table.Print()
if err != nil {
return err
}
return nil
}
func (ui *terminalUI) LoadingIndication() {
_, _ = ui.printer.Print(".")
}
func (ui *terminalUI) Table(headers []string) *UITable {
return &UITable{
UI: ui,
Table: NewTable(headers),
}
}
type UITable struct {
UI UI
Table *Table
}
func (u *UITable) Add(row ...string) {
u.Table.Add(row...)
}
// Print formats the table and then prints it to the UI specified at
// the time of the construction. Afterwards the table is cleared,
// becoming ready for another round of rows and printing.
func (u *UITable) Print() error {
result := &bytes.Buffer{}
t := u.Table
err := t.PrintTo(result)
if err != nil {
return err
}
// DevNote. With the change to printing into a buffer all
// lines now come with a terminating \n. The t.ui.Say() below
// will then add another \n to that. To avoid this additional
// line we chop off the last \n from the output (if there is
// any). Operating on the slice avoids string copying.
//
// WIBNI if the terminal API had a variant of Say not assuming
// that each output is a single line.
r := result.Bytes()
if len(r) > 0 {
r = r[0 : len(r)-1]
}
// Only generate output for a non-empty table.
if len(r) > 0 {
u.UI.Say("%s", string(r))
}
return nil
}
func (ui *terminalUI) NotifyUpdateIfNeeded(config coreconfig.Reader) {
if !config.IsMinCLIVersion(config.CLIVersion()) {
ui.Say("")
ui.Say(T("Cloud Foundry API version {{.APIVer}} requires CLI version {{.CLIMin}}. You are currently on version {{.CLIVer}}. To upgrade your CLI, please visit: https://github.com/cloudfoundry/cli#downloads",
map[string]interface{}{
"APIVer": config.APIVersion(),
"CLIMin": config.MinCLIVersion(),
"CLIVer": config.CLIVersion(),
}))
}
}