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97 lines
2.3 KiB
97 lines
2.3 KiB
package survey |
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import ( |
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"gopkg.in/AlecAivazis/survey.v1/core" |
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) |
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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, nil) |
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*/ |
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type Input struct { |
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core.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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} |
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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 "cyan"}}{{ HelpIcon }} {{ .Help }}{{color "reset"}}{{"\n"}}{{end}} |
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{{- color "green+hb"}}{{ QuestionIcon }} {{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"}}[{{ HelpInputRune }} 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() (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{Input: *i}, |
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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) == string(core.HelpInputRune) && i.Help != "" { |
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err = i.Render( |
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InputQuestionTemplate, |
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InputTemplateData{Input: *i, ShowHelp: true}, |
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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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// we're done |
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return string(line), err |
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} |
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func (i *Input) Cleanup(val interface{}) error { |
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return i.Render( |
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InputQuestionTemplate, |
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InputTemplateData{Input: *i, Answer: val.(string), ShowAnswer: true}, |
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) |
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}
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