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/**
* `editor` type prompt
*/
var util = require('util');
var chalk = require('chalk');
var ExternalEditor = require('external-editor');
var Base = require('./base');
var observe = require('../utils/events');
var rx = require('rx-lite-aggregates');
/**
* Module exports
*/
module.exports = Prompt;
/**
* Constructor
*/
function Prompt() {
return Base.apply(this, arguments);
}
util.inherits(Prompt, Base);
/**
* Start the Inquiry session
* @param {Function} cb Callback when prompt is done
* @return {this}
*/
Prompt.prototype._run = function (cb) {
this.done = cb;
this.editorResult = new rx.Subject();
// Open Editor on "line" (Enter Key)
var events = observe(this.rl);
this.lineSubscription = events.line.forEach(this.startExternalEditor.bind(this));
// Trigger Validation when editor closes
var 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 {Prompt} self
*/
Prompt.prototype.render = function (error) {
var bottomContent = '';
var 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
*/
Prompt.prototype.startExternalEditor = function () {
// Pause Readline to prevent stdin and stdout from being modified while the editor is showing
this.rl.pause();
ExternalEditor.editAsync(this.currentText, this.endExternalEditor.bind(this));
};
Prompt.prototype.endExternalEditor = function (error, result) {
this.rl.resume();
if (error) {
this.editorResult.onError(error);
} else {
this.editorResult.onNext(result);
}
};
Prompt.prototype.onEnd = function (state) {
this.editorResult.dispose();
this.lineSubscription.dispose();
this.answer = state.value;
this.status = 'answered';
// Re-render prompt
this.render();
this.screen.done();
this.done(this.answer);
};
Prompt.prototype.onError = function (state) {
this.render(state.isValid);
};
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