--- /dev/null
+'use strict';
+
+const ArrayPrompt = require('../types/array');
+const utils = require('../utils');
+
+class SelectPrompt extends ArrayPrompt {
+ constructor(options) {
+ super(options);
+ this.emptyError = this.options.emptyError || 'No items were selected';
+ }
+
+ async dispatch(s, key) {
+ if (this.multiple) {
+ return this[key.name] ? await this[key.name](s, key) : await super.dispatch(s, key);
+ }
+ this.alert();
+ }
+
+ separator() {
+ if (this.options.separator) return super.separator();
+ let sep = this.styles.muted(this.symbols.ellipsis);
+ return this.state.submitted ? super.separator() : sep;
+ }
+
+ pointer(choice, i) {
+ return (!this.multiple || this.options.pointer) ? super.pointer(choice, i) : '';
+ }
+
+ indicator(choice, i) {
+ return this.multiple ? super.indicator(choice, i) : '';
+ }
+
+ choiceMessage(choice, i) {
+ let message = this.resolve(choice.message, this.state, choice, i);
+ if (choice.role === 'heading' && !utils.hasColor(message)) {
+ message = this.styles.strong(message);
+ }
+ return this.resolve(message, this.state, choice, i);
+ }
+
+ choiceSeparator() {
+ return ':';
+ }
+
+ async renderChoice(choice, i) {
+ await this.onChoice(choice, i);
+
+ let focused = this.index === i;
+ let pointer = await this.pointer(choice, i);
+ let check = await this.indicator(choice, i) + (choice.pad || '');
+ let hint = await this.resolve(choice.hint, this.state, choice, i);
+
+ if (hint && !utils.hasColor(hint)) {
+ hint = this.styles.muted(hint);
+ }
+
+ let ind = this.indent(choice);
+ let msg = await this.choiceMessage(choice, i);
+ let line = () => [this.margin[3], ind + pointer + check, msg, this.margin[1], hint].filter(Boolean).join(' ');
+
+ if (choice.role === 'heading') {
+ return line();
+ }
+
+ if (choice.disabled) {
+ if (!utils.hasColor(msg)) {
+ msg = this.styles.disabled(msg);
+ }
+ return line();
+ }
+
+ if (focused) {
+ msg = this.styles.em(msg);
+ }
+
+ return line();
+ }
+
+ async renderChoices() {
+ if (this.state.loading === 'choices') {
+ return this.styles.warning('Loading choices');
+ }
+
+ if (this.state.submitted) return '';
+ let choices = this.visible.map(async(ch, i) => await this.renderChoice(ch, i));
+ let visible = await Promise.all(choices);
+ if (!visible.length) visible.push(this.styles.danger('No matching choices'));
+ let result = this.margin[0] + visible.join('\n');
+ let header;
+
+ if (this.options.choicesHeader) {
+ header = await this.resolve(this.options.choicesHeader, this.state);
+ }
+
+ return [header, result].filter(Boolean).join('\n');
+ }
+
+ format() {
+ if (!this.state.submitted || this.state.cancelled) return '';
+ if (Array.isArray(this.selected)) {
+ return this.selected.map(choice => this.styles.primary(choice.name)).join(', ');
+ }
+ return this.styles.primary(this.selected.name);
+ }
+
+ async render() {
+ let { submitted, size } = this.state;
+
+ let prompt = '';
+ let header = await this.header();
+ let prefix = await this.prefix();
+ let separator = await this.separator();
+ let message = await this.message();
+
+ if (this.options.promptLine !== false) {
+ prompt = [prefix, message, separator, ''].join(' ');
+ this.state.prompt = prompt;
+ }
+
+ let output = await this.format();
+ let help = (await this.error()) || (await this.hint());
+ let body = await this.renderChoices();
+ let footer = await this.footer();
+
+ if (output) prompt += output;
+ if (help && !prompt.includes(help)) prompt += ' ' + help;
+
+ if (submitted && !output && !body.trim() && this.multiple && this.emptyError != null) {
+ prompt += this.styles.danger(this.emptyError);
+ }
+
+ this.clear(size);
+ this.write([header, prompt, body, footer].filter(Boolean).join('\n'));
+ this.write(this.margin[2]);
+ this.restore();
+ }
+}
+
+module.exports = SelectPrompt;