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<pre class="prettyprint source linenums"><code>'use strict';
const assert = require('assert');
const _ = require('lodash');
/**
* @module promptSuggestion
* @description Utilities to allow remembering answers to Inquirer.js prompts
*/
const promptSuggestion = module.exports;
/**
* Returns the default value for a checkbox
*
* @param {Object} question Inquirer prompt item
* @param {*} defaultValue The stored default value
* @return {*} Default value to set
* @private
*/
const getCheckboxDefault = (question, defaultValue) => {
// For simplicity we uncheck all boxes and use .default to set the active ones
for (const choice of question.choices) {
if (typeof choice === 'object') {
choice.checked = false;
}
}
return defaultValue;
};
/**
* Returns the default value for a list
*
* @param {Object} question Inquirer prompt item
* @param {*} defaultValue The stored default value
* @return {*} Default value to set
* @private
*/
const getListDefault = (question, defaultValue) => {
const choiceValues = question.choices.map((choice) =>
typeof choice === 'object' ? choice.value : choice
);
return choiceValues.indexOf(defaultValue);
};
/**
* Return true if the answer should be store in
* the global store, otherwise false
*
* @param {Object} question Inquirer prompt item
* @param {String|Array} answer The inquirer answer
* @param {Boolean} storeAll Should store default values
* @return {Boolean} Answer to be stored
* @private
*/
const storeListAnswer = (question, answer, storeAll) => {
const choiceValues = question.choices.map((choice) => {
if (Object.prototype.hasOwnProperty.call(choice, 'value')) {
return choice.value;
}
return choice;
});
const choiceIndex = choiceValues.indexOf(answer);
// Check if answer is not equal to default value
if (storeAll || question.default !== choiceIndex) {
return true;
}
return false;
};
/**
* Return true if the answer should be store in
* the global store, otherwise false
*
* @param {Object} question Inquirer prompt item
* @param {String|Array} answer The inquirer answer
* @param {Boolean} storeAll Should store default values
* @return {Boolean} Answer to be stored
* @private
*/
const storeAnswer = (question, answer, storeAll) => {
// Check if answer is not equal to default value or is undefined
if (answer !== undefined && (storeAll || question.default !== answer)) {
return true;
}
return false;
};
/**
* Prefill the defaults with values from the global store
*
* @param {Store} store `.yo-rc-global` global config
* @param {Array|Object} questions Original prompt questions
* @return {Array} Prompt questions array with prefilled values.
*/
promptSuggestion.prefillQuestions = (store, questions) => {
assert(store, 'A store parameter is required');
assert(questions, 'A questions parameter is required');
const promptValues = store.get('promptValues') || {};
if (!Array.isArray(questions)) {
questions = [questions];
}
questions = questions.map(_.clone);
// Write user defaults back to prompt
return questions.map((question) => {
if (question.store !== true) {
return question;
}
const storedValue = promptValues[question.name];
if (storedValue === undefined || _.isFunction(question.choices)) {
// Do not override prompt default when question.choices is a function,
// since can't guarantee that the `storedValue` will even be in the returned choices
return question;
}
// Override prompt default with the user's default
switch (question.type) {
case 'rawlist':
case 'expand':
question.default = getListDefault(question, storedValue);
break;
case 'checkbox':
question.default = getCheckboxDefault(question, storedValue);
break;
default:
question.default = storedValue;
break;
}
return question;
});
};
/**
* Store the answers in the global store
*
* @param {Store} store `.yo-rc-global` global config
* @param {Array|Object} questions Original prompt questions
* @param {Object} answers The inquirer answers
* @param {Boolean} storeAll Should store default values
*/
promptSuggestion.storeAnswers = (store, questions, answers, storeAll) => {
assert(store, 'A store parameter is required');
assert(answers, 'A answers parameter is required');
assert(questions, 'A questions parameter is required');
assert.ok(_.isObject(answers), 'answers must be a object');
storeAll = storeAll || false;
const promptValues = store.get('promptValues') || {};
if (!Array.isArray(questions)) {
questions = [questions];
}
_.each(questions, (question) => {
if (question.store !== true) {
return;
}
let saveAnswer;
const key = question.name;
const answer = answers[key];
switch (question.type) {
case 'rawlist':
case 'expand':
saveAnswer = storeListAnswer(question, answer, storeAll);
break;
default:
saveAnswer = storeAnswer(question, answer, storeAll);
break;
}
if (saveAnswer) {
promptValues[key] = answer;
}
});
if (Object.keys(promptValues).length > 0) {
store.set('promptValues', promptValues);
}
};
</code></pre>
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