111 lines
2.5 KiB
Go
111 lines
2.5 KiB
Go
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package survey
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/*
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Input is a regular text input that prints each character the user types on the screen
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and accepts the input with the enter key. Response type is a string.
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name := ""
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prompt := &survey.Input{ Message: "What is your name?" }
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survey.AskOne(prompt, &name)
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*/
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type Input struct {
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Renderer
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Message string
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Default string
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Help string
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}
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// data available to the templates when processing
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type InputTemplateData struct {
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Input
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Answer string
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ShowAnswer bool
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ShowHelp bool
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Config *PromptConfig
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}
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// Templates with Color formatting. See Documentation: https://github.com/mgutz/ansi#style-format
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var InputQuestionTemplate = `
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{{- if .ShowHelp }}{{- color .Config.Icons.Help.Format }}{{ .Config.Icons.Help.Text }} {{ .Help }}{{color "reset"}}{{"\n"}}{{end}}
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{{- color .Config.Icons.Question.Format }}{{ .Config.Icons.Question.Text }} {{color "reset"}}
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{{- color "default+hb"}}{{ .Message }} {{color "reset"}}
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{{- if .ShowAnswer}}
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{{- color "cyan"}}{{.Answer}}{{color "reset"}}{{"\n"}}
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{{- else }}
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{{- if and .Help (not .ShowHelp)}}{{color "cyan"}}[{{ print .Config.HelpInput }} for help]{{color "reset"}} {{end}}
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{{- if .Default}}{{color "white"}}({{.Default}}) {{color "reset"}}{{end}}
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{{- end}}`
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func (i *Input) Prompt(config *PromptConfig) (interface{}, error) {
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// render the template
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err := i.Render(
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InputQuestionTemplate,
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InputTemplateData{
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Input: *i,
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Config: config,
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},
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)
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if err != nil {
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return "", err
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}
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// start reading runes from the standard in
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rr := i.NewRuneReader()
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rr.SetTermMode()
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defer rr.RestoreTermMode()
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cursor := i.NewCursor()
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line := []rune{}
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// get the next line
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for {
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line, err = rr.ReadLine(0)
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if err != nil {
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return string(line), err
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}
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// terminal will echo the \n so we need to jump back up one row
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cursor.PreviousLine(1)
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if string(line) == config.HelpInput && i.Help != "" {
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err = i.Render(
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InputQuestionTemplate,
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InputTemplateData{
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Input: *i,
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ShowHelp: true,
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Config: config,
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},
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)
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if err != nil {
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return "", err
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}
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continue
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}
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break
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}
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// if the line is empty
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if line == nil || len(line) == 0 {
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// use the default value
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return i.Default, err
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}
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lineStr := string(line)
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i.AppendRenderedText(lineStr)
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// we're done
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return lineStr, err
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}
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func (i *Input) Cleanup(config *PromptConfig, val interface{}) error {
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return i.Render(
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InputQuestionTemplate,
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InputTemplateData{
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Input: *i,
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Answer: val.(string),
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ShowAnswer: true,
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Config: config,
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},
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)
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}
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