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'use strict';
/**
* `editor` type prompt
*/
const chalk = require('chalk');
const { editAsync } = require('external-editor');
const Base = require('./base');
const observe = require('../utils/events');
const { Subject } = require('rxjs');
class EditorPrompt extends Base {
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
_run(cb) {
this.done = cb;
this.editorResult = new Subject();
// Open Editor on "line" (Enter Key)
const events = observe(this.rl);
this.lineSubscription = events.line.subscribe(this.startExternalEditor.bind(this));
// Trigger Validation when editor closes
const validation = this.handleSubmitEvents(this.editorResult);
validation.success.forEach(this.onEnd.bind(this));
validation.error.forEach(this.onError.bind(this));
// Prevents default from being printed on screen (can look weird with multiple lines)
this.currentText = this.opt.default;
this.opt.default = null;
// Init
this.render();
return this;
}
/**
* Render the prompt to screen
* @return {EditorPrompt} self
*/
render(error) {
let bottomContent = '';
let message = this.getQuestion();
if (this.status === 'answered') {
message += chalk.dim('Received');
} else {
message += chalk.dim('Press <enter> to launch your preferred editor.');
}
if (error) {
bottomContent = chalk.red('>> ') + error;
}
this.screen.render(message, bottomContent);
}
/**
* Launch $EDITOR on user press enter
*/
startExternalEditor() {
// Pause Readline to prevent stdin and stdout from being modified while the editor is showing
this.rl.pause();
editAsync(this.currentText, this.endExternalEditor.bind(this));
}
endExternalEditor(error, result) {
this.rl.resume();
if (error) {
this.editorResult.error(error);
} else {
this.editorResult.next(result);
}
}
onEnd(state) {
this.editorResult.unsubscribe();
this.lineSubscription.unsubscribe();
this.answer = state.value;
this.status = 'answered';
// Re-render prompt
this.render();
this.screen.done();
this.done(this.answer);
}
onError(state) {
this.render(state.isValid);
}
}
module.exports = EditorPrompt;
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